Note: Descriptions are shown in the official language in which they were submitted.
The present invention relates in general to a coke oven furnace
construction, and more particularly to a coke oven door used to seal the open-
ing of a coke oven furnace.
Prior to the present invention the door body of a coke oven door
that includes a locking mechanism and which is situai:ed outside and in front
of a coke oven furnace opening, and the brick supporter which carries bricks
that are directly subject to extremely high temperatures in the coke oven
furnace opening have been integrally constructed and secured directly to
each other by means of bolts or the like.
There are generated great differences in temperature between the
brick supporter, which is subject to such extremely high temperatures as
800C to 1100C, and the door body, so that the door body tends to bend or
distort outwardly due to heat expansion.
Lt is a disadvantage of this construction that this phenomenon
often prevents the opening of the coke oven furnace from being Eirmly sealed
by means of the door. Crevices are produced between the door and the opening
of the coke oven furnace so that gas or tar are leaked, resulting in air
pollution. Another disadvantage of this construction is that to prevent
these leaks it is often necessary to adjust knife edges provided on the door
body which seal the body to the coke oven furnace.
Summary of the Invention
According to the present invention there is provided a coke oven
door construction for closing an opening in a coke oven furnace comprising a
vertically elongated brick supporter for carrying a brick block in the coke
oven furnace opening which is exposed to high temperature within the coke
oven furnace, a door body spaced from the brick supporter and connected
thereto for carrying the brick supporter in the coke oven furnace opening,
said brick supporter being subject to vertical thermal expansion of varying
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degree along its vertical length due to the high temperature in the coke
oven furnace with highe} expansion at an upper portion than at a lower
portion of said brick supporter, at least one connecting pin rigidly connect-
ed between said brick supporter and said door body at one vertical Location
on said door body, a plurality of spaced sliding mechanisms connected between
said brick supporter and said door body for providing a sliding engagement
between said brick supporter and said door body, whereby vertical thermal
expansion of said brick supporter is not transmitted to said door body so
that said brick supporter and door body are not warped and distorted, said
at least one connecting pin being connected at a vertical position above the
central vertical position of said door body and brick supporter so that the
thermal expansion of an upper portion of said brick supporter above said at
least one connecting pin is equal to the thermal expansion of the lower
portion of said brick supporter below said connecting pin, a sea:Ling plate
connected around the periphery of said brick supporter, and a knife edge
connected around the periphery of said sealing plate bearing against a
periphery of the coke oven furnace opening to maintain a seal between said
brick supporter and the coke oven furnace opening.
Such a construction makes it possible for the bricks and supporters
which are subject to extremely high temperatures not to directly affect the
door body though they themselves extend, so that the door body will not be
distorted or bent.
A conventional door for a coke oven furnace has been made in general
of such large-sized and thick material so that it has a high stiffness in
order to prevent the door body from being distorted due to heat expansion~ ;
and to increase bearing stresses. The total weight and size of the door thus
often becomes increased to an undesirable extent so that the opening, closing,
attaching and detaching operations for the door become difficult. Large-sized
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door lifters are also needed, due to the great size. According to the
present invention, it is not necessary to strengthen the door body, unlike
in conventional ones, so that a light-weight door can be obtained, which
enables the attaching and detaching operations to be more easily carried out.
The novel door for a coke oven furnace is not distorted and does
not reduce the sealing effect with the opening of a coke oven furnace, and
a reduced requirement for adjusting operations of knife edges which are pro-
vided. The door is easily attachable and detachable, and is light-weight and
simple in design, rugged in construction and economical to manufacture.
For an understanding of the principles of the invention, re~erence
is made to the following description of typical embodiments thereof as illus-
trated in the accompanying drawings.
Description of the Drawings
Referrlng now to the attached drawings;
Figure 1 is a side sectional view taken on the line C-C~ of Figure
3 showing a door for a coke oven furnace embodied in accordance with the
present invention.
Figure 2 is a sectional view taken on the line A-A' of Figure 1.
Figure 3 is an enlarged sectional view taken on the line B-B' oE
Figure 1.
Figure 4 is an enlarged sectional view showing the sliding mechanism
portion.
Figure 5 is an enlarged sectional view showing the portion secured
by means of connecting pins,
General Description of the Preferred Embodiment
In the embodiment shown in the drawing, numeral 1 designate a door
bocly, which is constructed of almost the same size as the opening 5 of a coke
oven furnace 4, and which has a locking bar 14 and a locking bar holder 15 on
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the outer surEace at the upper and lower portion thereof.
Numeral 2 is a metallic brick supporter secured to door body 1 and
spaced therefrom as shown in Figure 1, by means of one or more connecting
pins 8, and this brick supporter is constructed slightly smaller than the
opening 5, having a brick block 3 to be situated inside the coke oven
furnace 4. The brick block 3 is used for sealing off high temperatures from
the inside of coke oven furnace 4.
Numeral 6 is a sealing plate made of stainless steel located at
the periphery of the supporter 2. The sealing plate 6 includes kniEe edges
6' provided therearound. Each of these knife edges is in contact with a
receiving frame 7 of the opening 5 of coke oven furnace 4 to seal the suppor-
ter 2 around them.
In this embodiment, brick supporter 2 is secured to door body 1
by means of connecting pin 8 at welded position 8' as seen ln Figure 5, and
such welding is made at the two points horizontally on door body 1 at one
vertical position.
In addition, the connecting pin 8 is to be used in a higher posi-
tion than the middle of the door body, since at the opening 5, the higher one
goes, the hotter it is so that the heat effect and heat expansion are differ-
ent at the lower and upper portion while centering on connecting pin 8, thus
the degree of extention due to heat also differs from each other at the lower
and upper side.
Numeral 9 is a guide supporter utilizable for one example as a
sliding mechanism 10 provided between door body 1 and brick supporter 2 in
order to maintain a certain space ~a' between the two. The guide supporter 9
is of an open channel shape and has its opening 9~ facing door body 1 as seen
in Figure 4.
Numeral 13 is an engaging or T-shaped body inlayed into the guide
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supporter 9, and fixed to door body 1 by means of bolt 11 and nut 12.
Said sliding mechanism 10 connects door body 1 with brick supporter
2 by way of spaces ~a' at the upper end and lower part of connecting pin 8.
And said brick supporter 2 is so constructed as to extend itself in the
directions indicated by the arrows X ~ Y as sho~ in Figure 1 due to thermal
forces.
According to the present invention thus composed, brick supporter
2 can be extended vertically, centering on connecting pin 8, and when said
brick supporter 2 and brick block 3 are affected by extremely high tempera-
tures in the coke oven furnace~ they extend themselves vertically due to heat
expansion with no effect on door body, that is, door body 1 will not be by
heat expansion in supporter 2.
If door body 1 and supporter 2 are integrally secured and fixed,
then door body 1 tends to be distorted, but according to the present inven-
tion, door body will not be bent nor distorted due to the sliding connection
10 .
In addition, there is provided in the embodiment~ sealing plate 6
around said brick supporter 2, and at the periphery of the for~er there are
provided knife edges to be in contact with receiving frame 7, so that if said
brick supporter 2 slides vertically, a knife edge 6 can move s~oothly along
the surface of receiving frame 7. And as mentioned above, said brick
supporter 2 extends vertically due to heat expansion, but is little distorted,
so that the tip of knife edge 6' will not discontact with the surface of
receiving frame 7O
The present invention thus will perform the following effectively.
1) There is no danger of gas or tar leakage due to sealing failure,
since the present invention is capable of forming a firm sealing of the open-
ing 5 of the coke oven furnace 4.
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2) High performance oE closing or sealing of the door makes it
possible to reduce or eliminate adjustment operations for knife edges.
3) It is not necessary to increase stiffness of the door body,
so that a lighter one can be available, thus resulting in obtaining a lighter
and smaller-si~ed door lifter.
~ ) There is provided a certain space 'a "to constitute an air
layer, which cuts off high temperatures inside the coke oven, and is little
affected by heat.
For these reasons door body 1 will not be distorted due to heat,
thus there is found an advantage that operational errors ~esulting from
attaching, detaching and locking the door will disappear.
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