JP2000109845A - Flattened mouthpiece metal work of small closure attached to coke-oven door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject flattened mouthpiece metal work having such improvements as not to deform itself to cause gas leakage be being exposed to high temp. gas, consequently as not to burn out the seal plate and not to increase considerably the gas leakage from the small closure, by providing a flattened mouthpiece metal work of a small closure with a gap along the lateral direction. SOLUTION: A flattened mouthpiece metal work 4 of a small closure 3 attached to the oven door 2 of a coke-oven 1, has two cut parts between which a gap 5 is made to absorb the thermal deformation, and as a result of the absorption, the metal work 4 is made not to expand out towards the inside of the coke-oven 1. Thus, this does not cause crevices among the parts such as the flattened mouthpiece metal work 4, a heat insulating board 14 passed through with a bolt 9, a seal plate 7 welded with a knife edge 12, a slide plate 8, and a small-closure mouthframe 10, and consequently does not cause the burning out of the seal plate 7 owing to the leakage of a high temp. gas. In addition, the small closure 3 is constituted with the flattened, mouthpiece metal work 4, a small-closure mouthframe 10, a small-closure knife edge 16, a small-closure seal plate 17, and a small-closure body. This constitution enables a long-time use of the whole oven, reduces a repairing cost and also an exchanging time, hence contributes extremely to labor-saving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leveling fitting attached to a small lid of a furnace lid for guiding a leveling rod for leveling coal deposited in a coke oven.

[0002]

2. Description of the Related Art As shown in FIG.
The leveling fitting 24 of the small lid 23 attached to the furnace lid 22 is an integral structure of a heat-resistant steel casting, and the leveling fitting 24 is formed by a bolt 29 penetrating the seal plate 27 and the slide plate 28. It was fixed to the mouth frame 30. At this time, when attaching the bolt 29 to the small lid opening frame 30, a casting hole is formed in the working range of the spanner so that the tip of the spanner for rotating the head of the bolt 29 does not hit the side surface of the fitting 24. I have. However, in the leveling fitting 24 as described above, although the leveling rod guides the leveling coal for leveling the coal deposited in the coke oven as the original function of the leveling fitting 24, the leveling fitting itself is used in the furnace. During the operation of the slab, it is greatly deformed by being exposed to the high-temperature gas.
A gap is formed in the contact area between the seal plate 4 and the seal plate 27, and as a result, the seal plate 27 is distorted according to the deformation of the leveling fitting 24, or the high-temperature gas Leaks and flows, and the seal plate 27 is burned.
Of the coke oven and thereby the seal between the coke oven and the outside of the oven is impaired, resulting in significant gas leakage in the small lid 23. As a result, the function of the small lid 23 of the lid 22 is impaired.

More specifically, during operation of the coke oven 21, the leveling fitting 24 is in a high temperature state of 600 ° C. or higher. However, when the operation of the coke oven 21 is completed, the small lid is cleaned by cleaning the door cleaner with cooling water. The flange portion of the leveling fitting 23 is rapidly cooled to a temperature near normal temperature. As a result, a large temperature difference is generated between the portion A (FIG. 7) of the leveling fitting 24 near the inside of the furnace and the portion B (FIG. 7) far from the inside of the furnace, and thermal strain occurs. Subsequently, when the operation of the coke oven 21 is started again, the small lid opening frame 30 by the bolt 29 due to the thermal strain.
The leveling cap 24 mounted on the coke oven 21 bulges by about 2 mm to 3 mm toward the coke oven 21. As a result, a gap is generated between the seal plate 27 penetrated by the bolt 29 and the small lid cap frame 30, and High-temperature gas leaks and flows through the mounting hole of the plate 27 to the outside of the small lid opening frame 30, and the seal plate 27 is burned out, resulting in significant gas leakage out of the coke oven.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the leveling fitting of the small lid attached to the furnace lid of a coke oven to high temperature gas, and the leveling fitting itself is deformed. In order to prevent gas leakage from the mounting hole of the seal plate as a result of burning of the seal plate and as a result, gas leakage of the small lid does not become significant, by improving the leveling fitting is there.

[0005]

According to the present invention, the object is to provide a coke oven 1 according to the present invention.
In the leveling fitting 4 of the small lid 3 attached to the furnace lid 2 of
The problem is solved by the leveling base of the coke oven door lid, characterized in that the leveling base 4 is provided with a gap 5 or 5 'in the lateral direction.

Further, according to the present invention, the above-mentioned problem is solved by the features specified in claims 2 and 3, that is, in the leveling cap 4 of the small lid 3 attached to the furnace lid 2 of the coke oven 1. A gap 5 'is provided in the leveling base 4 in the lateral direction thereof, and the leveling base 4 is composed of two parts, a leveling base 4c and a flange 4d. The leveling fitting 4 of the small lid 3 attached to the furnace lid 2 of the coke oven 1 by means of the leveling fitting of the lid, the side of the leveling fitting 4 is partially notched, and a normal leveling fitting is used. The problem is solved by the leveling fitting of the coke oven door small lid, characterized in that the notch leveling fitting 6 has a smaller area than the area of the side surface 4.

Therefore, as shown in FIG.
A gap 5 is provided between the two cut pieces 4a and 4b, or a gap 5 'is formed as shown in FIG. ', The leveling cap 4 is prevented from bulging toward the coke oven 1 by this absorption. By constructing the leveling base 4 as described above, the leveling base 4 with the bolt 9 attached thereto, the heat insulating plate 14 penetrated by the bolt 9, the seal plate 7, the slide plate 8, and the small lid frame. No gaps are formed between the members of the seal plate 10, and therefore, the seal plate 7 is not burned out due to leakage and flow of the high-temperature gas from these gaps and the mounting holes.

The gaps 5 and 5 'shown in FIGS. 1 and 2 are provided only at one side of the leveling fitting 4, but may be plural. As shown in FIG. 3, a gap 5 'is provided from the tip of the leveling base 4c to the casting hole to absorb thermal deformation. The leveling fitting 4c is attached to a separate flange 4d with bolts 9 '. The bolt 9 'is only long enough to be attached to the flange 4d, and does not penetrate the heat insulating plate 14, the seal plate 7, and the slide plate 8. The flange 4 d is fixed to the small lid opening frame 10 by bolts 9 ″ penetrating the heat insulating plate 14, the seal plate 7, and the slide plate 8.

The advantages of the leveling fitting according to FIG.
One is. The flange 4d is behind the leveling fitting 4c and is not directly heated because of the shadow of the heat radiation. Since the flange 4d is separate from the leveling base 4c and is firmly fixed to the slide plate 8 and the small lid opening frame 10, there is no thermal deformation. Therefore, there is no gap due to the deformation of the flange 4d in the penetrating portion of the heat insulating plate 14, the seal plate 7, and the slide plate 8 formed by the bolts 9 '', and there is no loosening.

[0010] Even if the leveling base 4c is distorted by the heat, the deformation is absorbed by the gap 5 '. Even if the leveling cap 4c is deformed, the heat shield 14, the seal plate 7, and the slide plate 8 are not affected because they are separate from the flange 4d. Since the flange 4d and the leveling base 4c are separate bodies, they can be easily removed, and the leveling base 4c can be repaired separately from the flange 4d.

As shown in FIG. 4, the clearance between the leveling base 4 and the seal plate 7 is hardly formed by partially removing the side surface of the leveling base 4 and reducing the area of the side surface. By forming the leveling base 4 as a notch leveling base 6 by suppressing the thermal deformation as described above, that is, by reducing the area of the side surface of the leveling base 6, the side of the notch leveling base 6 is reduced. The temperature difference in the direction is reduced to prevent thermal deformation of the side surface of the leveling base 4, thereby preventing the formation of a gap between the notch leveling base 6 and the seal plate 7, and Prevents burnout.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When a furnace lid 2 is attached to a kiln opening of a coke oven 1, a knife edge 12 abuts a furnace frame 13 to perform gas sealing. The seal plate 7 to which the knife edge 12 is welded expands greatly due to the high-temperature gas. However, a heat insulating plate 14 is provided on the surface of the seal plate 7 on the coke oven 1 side, and On the other hand, the seal plate 7 and the heat insulating plate 14 are integrally connected to the slide plate 8 by stacking the slide plates 8 against each other and mounting a distance piece 19 so as to be slidable between the slide plates 8 and the main body of the furnace lid 2. In addition, the seal plate 7 is rigidly supported, and on the other hand, free of thermal expansion and contraction of the seal plate 7 is allowed except for a portion to be tightened by the bolt 9 to absorb thermal expansion (FIG. 5).

In particular, since the upper region of the seal plate 7 becomes hot, the heat insulating plate 14 is placed on the seal plate 7 from this region to the furnace lid brick 15 on the side of the coke oven 1 so that the seal plate 7 is Prevents direct exposure to hot gases (FIG. 5). Coke oven 1 of furnace lid 2
The furnace lid brick 15 is provided on the side to close the kiln opening as in the conventional case (FIG. 5).

The small lid 3 comprises a leveling base 4, a small lid opening frame 10, a small lid knife edge 16, a small lid seal plate 17, and a small lid 18 as in the prior art (FIG. 5).

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. The opening of the coke oven 1 can be closed by an oven lid 2 equipped with a small lid 3. The closing of the furnace frame 13 of the coke oven 1 by the furnace lid 2 is provided on the furnace lid 2 to hook the bar of the furnace lid 2 on the hook of the coke oven 1 with a bar receiving hook (not shown) attached to the furnace frame 13. It is arranged outside the case for the spring 11, and is carried out by pressing the furnace lid 2 against the surface of the furnace frame 13 by only partially locking the illustrated bar. The seal between the inside of the coke oven and the outside of the oven on the surface of the furnace frame 13 is fixed at the ends to knife edges 12 provided above and below the furnace lid 2 to seal the kiln opening. This is carried out by pressure bonding to the furnace frame 13 by the above method. The seal plate 7 whose end is fixed to the knife edge 12 is provided on the coke oven 1 side and above the coke oven 1 in the heat insulating plate 1 extending to the oven lid brick 15.
4 and thereby the coke oven 1
Direct heat radiation from inside to the seal plate 7 is blocked.

The leveling fitting 4 is mounted on the furnace lid 2 together with the small lid 3. At this time, the leveling fitting 4, the seal plate 7, the slide plate 8, and the small lid opening frame 10 are arranged from the coke oven 1 side. The leveling cap 4 is integrally connected to the small cap frame 10 by bolts 9 which are arranged in this order and penetrate these members. On the surface of the small lid opening frame 10, it is attached to the small lid lid body 18 of the small lid 3 and provided so as to be able to advance and retreat with respect to the surface of the small lid opening frame 10, and the end of the small lid sealing plate 17 is fixed. The cut small knife edge 16 comes into contact. The small lid body 18 can be fixed to the small lid opening frame 10, and the small lid knife edge 16 can be fixed to the surface of the small lid opening frame 10 by an adjustment screw provided on the small lid opening frame 18. The crimping force can be reduced by compressing or relaxing the spring force provided by the spring provided on the edge 16.

Although the slide plate 8 is formed thick only in the area of the small lid 3, a separate plate may be welded to this area to form a thick portion. In FIG. 5, the slide plate 8 extends further downward from the area of the small lid 3, and on the coke oven 1 side, the oven lid brick 15 together with the seal plate 7 is fixed to the main body of the oven lid 2.
In the end area of the furnace lid brick 15, a distance piece 19 is attached between the slide plate 8 and the main body of the furnace lid 2 on the side opposite to the coke oven 1.

As a first embodiment, as shown in FIG. 1, two pieces 4a and 4b of the leveling base 4 obtained by cutting the leveling base 4 into two in the horizontal direction are provided with a gap 5 of 3 mm to 5 mm. To join together. As a result, when the leveling fitting 4 is thermally expanded, the thermal deformation of the two leveling piece cut pieces 4a and 4b can be absorbed by the gap 5. The size of the gap 5 is limited to a maximum of 5 mm.

As a second embodiment, as shown in FIG. 2, a gap 5 'is provided in the lateral direction of the leveling base 4 so as to extend from the left end of FIG. As a result, thermal deformation can be absorbed by the gap 5 'when the leveling fitting 4 is thermally expanded. The size of the gap 5 'is the same as in the first embodiment, and is set to a maximum of 5 mm or less. As shown in FIG. 3 as a third embodiment, the leveling base 4 is replaced with a leveling base 4c.
And a flange 4d and a leveling fitting 4c
A gap 5 'leading from the tip of the to the casting hole is provided to absorb thermal deformation. The leveling fitting 4c is attached to a separate flange 4d with bolts 9 '. Bolt 9 'is leveling base 4c
Is just long enough to attach it to the flange 4d.
4. The seal plate 7 and the slide plate 8 do not penetrate. The flange 4d is connected to the heat insulating plate 14 by bolts 9 ",
It penetrates through the seal plate 7 and the slide plate 8 and is fixed to the small lid opening frame 10.

As a fourth embodiment, as shown in FIG. 4, in order to reduce the temperature difference in the horizontal direction of the leveling fitting 4, a part of the side is removed to reduce the area of the side, and the notch level is reduced. It is referred to as a base 6. According to the above-mentioned four embodiments, the deformation due to the thermal expansion of the leveling base 4 causes the gap 5 between the two leveling base cut pieces 4a and 4b or the tip of the leveling base 4 in the lateral direction. Is absorbed by the gap 5 'extending from the hole to the casting hole, or furthermore, the leveling base is composed of two parts, the leveling base 4c and the flange 4d, or the heat of the notch leveling base 6 Since the leveling die 4 does not deform so much as to impair the function of the leveling die 4 due to expansion, the leveling die 4 swells toward the coke oven 1 side, and the sealing plate 7 penetrated by the bolt 9 or 9 ″. A gap is prevented from being formed between the coke oven and the small lid frame 10, and the gas is prevented from leaking out of the coke oven due to the burnout of the slide plate 8 and the seal plate 7 under the high-temperature gas.

[0021]

Either the thermal deformation of the leveling base is absorbed by the gap or the leveling base is rigidly attached to the cap frame with a flange, or the leveling base is fixed. The lack of deformation that impairs the function makes it possible to use the entire furnace lid for a long time. This leads not only to a reduction in repair costs but also to a reduction in replacement time, contributing significantly to labor savings.

Further, since there is no thermal deformation, no gas leakage occurs and the atmosphere around the coke oven is not polluted. Since there is no loss due to gas leakage, it significantly contributes to energy saving.

[Brief description of the drawings]

FIG. 1 is a side view of a leveling fitting according to a first embodiment of the present invention.

FIG. 2 is a side view of a leveling fitting according to a second embodiment of the present invention.

FIG. 3 is a side view of a leveling fitting according to a third embodiment of the present invention.

FIG. 4 is a side view of a leveling fitting according to a fourth embodiment of the present invention.

FIG. 5 is a view showing a state in which the leveling cap according to the present invention is incorporated in a furnace cover of a coke oven.

FIG. 6 is a side view of a leveling cap according to the prior art.

FIG. 7 is a view showing a state in which a leveling cap according to the prior art is incorporated in a furnace lid of a coke oven.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coke oven 2 Furnace lid 3 Small lid 4 Leveling piece 4a Leveling piece 4b Leveling piece 4c Leveling piece 4d Flange 5 Gap 5 'Gap 6 Notch leveling piece 7 Seal plate Reference Signs List 8 Slide plate 9 Bolt 9 'Bolt 9 "Bolt 10 Small lid frame 11 Spring 12 Knife edge 13 Furnace lid 14 Heat insulation plate 15 Furnace lid brick 16 Small lid knife edge 17 Small lid seal plate 18 Small lid lid

Continued on front page (72) Inventor Takashi Torii 4-1-1, Tsukiji, Chuo-ku, Tokyo Inside Otto Corporation (72) Inventor Hideo Ayabe 4-1-1, Tsukiji, Chuo-ku, Tokyo Otto Corporation (72) Inventor Yoshinori Tsukamoto 5-3 Tokai-cho, Tokai-shi, Aichi Prefecture Inside Nippon Steel Corporation Nagoya Works (72) Inventor Yoichi Sato 5-3-1 Tokai-cho, Tokai-city, Aichi Prefecture Nippon Steel Corporation Nagoya Works (72) Inventor Yoshihiro Ishibashi 5-3 Tokai-cho, Tokai-shi, Aichi F-term in Nippon Steel Corporation Nagoya Works 4H012 BA05

Claims (3)

[Claims] 1. A leveling fitting (4) of a small lid (3) attached to a furnace lid (2) of a coke oven (1). A leveling fitting for the coke oven door lid, wherein a gap (5 or 5 ') is provided. 2. A leveling fitting (4) of a small lid (3) attached to a furnace lid (2) of a coke oven (1). Gap (5 ')
And the leveling base (4) is leveled.
(c) a flange of the coke oven door lid (4d). 3. A leveling fitting (4) of a small lid (3) attached to a furnace lid (2) of a coke oven (1), wherein a side surface of the leveling fitting (4) is partially cut out. A leveling fitting for a coke oven door small lid, wherein a notch leveling fitting (6) having a reduced area than a side surface area of a normal leveling fitting (4).