Stove lid

Abstract

To provide an oven lid of a coke oven, which is capable of suppressing deformation of a seal plate.SOLUTION: An oven lid 10 that is an oven lid capable of blocking a kiln mouth 84 of a coke oven 100, includes: a seal plate 1 provided with a knife edge portion 12 for coming into contact with an oven frame 82 of the kiln mouth 84; and a slide plate 2 placed over the seal plate 1 on an outside of the oven. The slide plate 2 includes: a slide plate body 21; and a horizontal rib 22 projecting in a thickness direction from the slide plate body 21 and extending in a lateral direction of the kiln mouth 84.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a furnace roof for a coke oven. [Background technology]

[0002] A coke oven hood for opening and closing the mouth of a coke oven is known. Patent Document 1 describes a coke oven hood in which an airtight furnace mouth overlapping member is attached to the furnace inner side of the hood frame. This airtight furnace mouth overlapping member includes a heat-resistant metal seal plate with a flange member attached to the periphery of the furnace wall near the entrance and exit of the coke oven, a metal inner furnace plate attached to the inner side of the seal plate, and a metal slide plate attached to the outer side of the seal plate and slidable relative to the hood frame. The inner furnace plate, seal plate, and slide plate are integrated with each other by a plurality of bolts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3230420 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors have come to the following realization regarding furnace covers. To ensure the sealing performance of a coke oven cover, it is important to ensure a good contact between the furnace frame surface on the furnace body side and the knife edge of the seal plate on the cover side. However, the temperature inside a coke oven is high, exceeding 1000°C, and a large thermal load is applied to the cover that abuts the coke oven. The seal plate is deformed by repeated expansion and contraction due to this thermal load. This deformation reduces the contact of the seal plate, resulting in insufficient sealing performance.

[0005] In the furnace head described in Patent Document 1, the seal plate, furnace inner plate, and slide plate are integrated with stud bolts, and in order to suppress deformation such as wrinkles in the seal plate, numerous stud bolts are used at positions 25 to 100 mm from both ends in the width direction of the slide plate. In other words, this furnace head suppresses deformation of the seal plate by increasing the number of stud bolts.

[0006] It is desirable to replace seal plates at a predetermined frequency, and to ensure workability during replacement, it is desirable to reduce the number of studs used to secure the seal plates. However, in the furnace roof of Patent Document 1, if the number of studs is reduced to ensure workability, deformation of the seal plates cannot be suppressed to the desired level.

[0007] The present invention has been made in view of the above problems, and one of its objects is to provide a coke oven furnace hood that can suppress deformation of the seal plate. [Means for solving the problem]

[0008] In order to solve the above problems, one aspect of the present invention provides a furnace cover capable of closing the mouth of a coke oven, comprising a seal plate provided with a knife edge portion for abutting against the furnace rim of the mouth, and a slide plate disposed on the outer side of the seal plate. The slide plate has a slide plate body and a transverse rib protruding from the slide plate body in the thickness direction and extending in the short direction of the mouth.

[0009] Any combination of the above components, or mutual substitution of the components or expressions of the present invention between methods, systems, etc., are also valid aspects of the present invention. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a coke oven hood that can suppress deformation of the seal plate. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional view showing a schematic horizontal cross section of a furnace cover according to this embodiment. [Figure 2] FIG. 2 is a front view showing the slide plate of the furnace cover of FIG. [Figure 3] FIG. 3 is a side view of the slide plate of FIG. [Figure 4] 4 is a cross-sectional view of the slide plate of FIG. 2 cut along the horizontal plane along the line AA. [Figure 5] 5 is a cross-sectional view of the slide plate of FIG. 2 taken along the horizontal line BB. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present disclosure will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modified examples, identical or equivalent components and members are designated by the same reference numerals, and redundant explanations will be omitted where appropriate. Furthermore, the dimensions of the members in each drawing are enlarged or reduced as appropriate for ease of understanding. Furthermore, some members that are not important for explaining the embodiments are omitted from the drawings.

[0013] Furthermore, separate components that share something in common are distinguished by prefixing their names with "first," "second," etc., and these are omitted when referring to them collectively. Terms including ordinal numbers such as "first" and "second" are used to describe various components, but these terms are used only to distinguish one component from other components and do not limit the components.

[0014] First, an overview of the present disclosure will be described. The sealing performance of a coke oven hood depends on the degree of contact between the furnace frame and the knife edge of the hood's seal plate. However, the temperature inside a coke oven is high, exceeding 1,000°C, and the hood that contacts it is subjected to a large thermal load. This causes the seal plate to deform due to thermal expansion, deteriorating its sealing performance. Because the seal plate is subject to thermal deformation, it is important to regularly replace the seal plate to maintain the hood's sealing performance.

[0015] The furnace roof described in Patent Document 1 has a configuration in which the seal plate, furnace inner plate, and slide plate are integrated with stud bolts. The stud bolts are positioned within a range of 25 to 100 mm from both lateral ends of the slide plate to suppress deformation (wrinkling) of the seal plate and improve sealing performance. However, this configuration significantly increases the number of stud bolts, which requires a great deal of labor to replace the seal plate and makes maintenance difficult. This configuration also increases the possibility of gas and tar leaks through the bolt holes of the stud bolts.

[0016] The seal plate is sandwiched between an inner plate on the furnace interior side and a slide plate on the atmospheric side. Because the furnace interior side of the furnace lid is exposed to high temperatures and the atmospheric side is cooled by the atmosphere, the temperature difference between the inner and outer surfaces becomes large, making each plate prone to warping. The inventors have found that suppressing warping of the slide plate on the atmospheric side is effective in suppressing warping of the seal plate.

[0017] The inventors' research has revealed that providing multiple horizontal ribs extending laterally on the slide plate suppresses lateral deformation of the slide plate, thereby suppressing deformation of the seal plate and improving the sealing performance of the furnace hood. This configuration eliminates the need for stud bolts to maintain sealing performance. Since the number of bolt holes can be reduced in accordance with the number of stud bolts, the possibility of gas or tar leakage through the bolt holes can be reduced, and good maintainability can be achieved. The furnace hood of the present disclosure will be specifically described below with reference to the embodiments.

[0018] [Embodiment] First, the overall configuration of a furnace hood 10 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view showing a horizontal cross section of the furnace hood 10. FIG. 2 is a front view of a slide plate 2. In this figure, (a) an overall view is shown on the left, and (b) an enlarged view of the upper vertical section is shown on the right. The furnace hood 10 is a structure capable of opening and closing the furnace opening 84 of the carbonization chamber 7 of a coke oven 100. For ease of explanation, the horizontal left-right direction in a front view of the furnace hood 10 is referred to as the horizontal direction, the vertical up-down direction in a front view of the furnace hood 10 is referred to as the vertical direction, and the front-to-back direction in a front view of the furnace hood 10 is referred to as the thickness direction. In this example, the short side of the furnace opening 84 is the direction along the horizontal direction, and the long side of the furnace opening 84 is the direction along the vertical direction. The horizontal, vertical, and thickness directions are perpendicular to each other. In addition, in the thickness direction, the direction from the outside toward the inside of the furnace is referred to as the furnace inside, and the opposite direction is referred to as the furnace outside. Such directional indications do not limit the position of the furnace cover 10, and the furnace cover 10 can be used in any position.

[0019] The furnace cover 10 is a structure that presses against and closes a furnace frame 82 attached to the periphery of the furnace mouth 84 of a coke oven 100 constructed using refractory materials 8 such as firebricks and non-refractory materials, thereby airtightly sealing the inside of the coke oven chamber 7 of the coke oven 100. In this example, the longitudinal direction of the furnace cover 10 or the furnace mouth 84 is the vertical direction, and the lateral direction is the horizontal direction when viewed from the front. The furnace cover 10 mainly includes a furnace cover frame 5, a slide plate 2, a seal plate 1, an inner furnace plate 4, and firebricks 6.

[0020] The furnace cover frame 5 is a steel frame member with a frame structure formed by casting. The furnace cover frame 5 is installed approximately parallel to the slide plate 2 on the outside of the furnace. The furnace cover frame 5 is sized to fit the vertically long kiln mouth 84 and is installed so that the kiln mouth 84 can be opened and closed. On the inside of the furnace cover frame 5, in order of thickness, are attached the slide plate 2, seal plate 1, inner furnace plate 4, and refractory bricks 6. The slide plate 2, seal plate 1, inner furnace plate 4, and refractory bricks 6 are sometimes collectively referred to as the "furnace cover polymer."

[0021] The slide plate 2 is a steel structure that supports the seal plate 1, the furnace inner plate 4, and the refractory bricks 6, which are located on the main furnace inner surface. It is desirable that the slide plate 2 be able to withstand the weight of these supported components and maintain a constant shape without bending or deforming even at high temperatures. The slide plate 2 is attached to the furnace cover frame 5 via pins (not shown), and is supported so that it can slide vertically relative to the furnace cover frame 5. The slide plate 2 extends mainly in the vertical and horizontal directions.

[0022] The seal plate 1 has a seal plate body 11 and a knife edge portion 12 for contacting the furnace frame 82 of the kiln opening 84. The seal plate body 11 is a steel plate-shaped member extending vertically and horizontally. The knife edge portion 12 seals the outer periphery of the furnace lid 10 by contacting the furnace frame 82. The knife edge portion 12 is a member having a knife edge cross-sectional shape (a blade-shaped cross-sectional shape) that contacts the furnace frame 82. The seal plate body 11 has a vertically elongated rectangular shape in front view, and has dimensions that extend vertically from both the top and bottom of the slide plate 2 and horizontally from both the left and right of the slide plate 2. The knife edge portion 12 is joined to the outer periphery of the seal plate body 11 by welding.

[0023] The seal plate 1 is provided so as to overlap the slide plate 2 on the furnace inside. In other words, the slide plate 2 is disposed so as to overlap the seal plate 1 on the furnace outside. The seal plate body 11 is supported by the slide plate 2 with its main surface abutting against the main surface of the slide plate 2. The seal plate 1 is sandwiched between the slide plate 2 and the in-furnace plate 4 in the thickness direction.

[0024] The in-furnace plate 4 is a steel plate-like member attached to the outside of the furnace of the refractory bricks 6. The in-furnace plate 4 is placed on top of the seal plate 1 on the inside of the furnace. One main surface of the in-furnace plate 4 abuts against the main surface of the seal plate 1, and the other main surface abuts against the refractory bricks 6. The in-furnace plate 4 may be composed of a single plate or may be composed of multiple plates stacked together. The in-furnace plate 4 may include a heat-resistant packing sheet. The packing sheet may be provided on the abutting surface with the refractory bricks 6 and / or the abutting surface with the refractory bricks 6. The slide plate 2, seal plate 1, and in-furnace plate 4 are integrated by stud bolts (not shown). For example, the stud bolts are attached laterally inward by fastening bolts 62 when viewed from above.

[0025] The refractory bricks 6 are heat-resistant structures that protrude into the inside of the furnace and provide heat-resistant protection for the furnace roof polymer and furnace roof frame 5. The refractory bricks 6 include a refractory brick body 61 and a plurality of fastening bolts 62 that extend in the thickness direction. One end of the fastening bolts 62 is embedded in the surface of the refractory brick body 61 facing outside the furnace, and the other end protrudes in the thickness direction toward the outside of the furnace. The fastening bolts 62 are arranged at predetermined intervals on the surface of the refractory brick body 61 facing outside the furnace. In this example, two rows of fastening bolts 62 are arranged horizontally apart, one row spaced apart from the other row arranged vertically at predetermined intervals.

[0026] Fastening bolts 62 pass through bolt holes 44 provided in the in-furnace plate 4, bolt holes 14 provided in the seal plate 1, and bolt holes 24 provided in the slide plate 2, and protrude from the surface of the slide plate 2 facing outside the furnace. Bolt holes 44, 14, and 24 pass through in the thickness direction at positions corresponding to the positions of the multiple fastening bolts 62. By fastening nuts 63 to the protruding sides of the fastening bolts 62, the slide plate 2, seal plate 1, and in-furnace plate 4, which are integrated by the embedded bolts, are pressed against and fixed to the refractory brick body 61.

[0027] The slide plate 2 will be described with reference to Figures 3, 4, and 5. Figure 3 is a side view of the slide plate 2, corresponding to the enlarged view (b) of Figure 2. Figure 4 is a cross-sectional view of the slide plate 2 taken along the horizontal plane along line AA in Figure 2. Figure 5 is a cross-sectional view of the slide plate 2 taken along the horizontal plane along line BB in Figure 2.

[0028] The slide plate 2 has a slide plate body 21, horizontal ribs 22, vertical ribs 23, and a slide member 31. The slide plate body 21 is a steel plate-shaped member extending in the vertical and horizontal directions. When viewed from the front, the slide plate body 21 has a rectangular shape that is longer in the vertical direction than in the horizontal direction, and has approximately the same size as the outer contour of the furnace cover frame 5 when viewed from the front. The main surface of the slide plate body 21 on the inside of the furnace is placed on top of the seal plate 1 on the outside of the furnace and abuts against the seal plate 1.

[0029] As shown in FIG. 2 , a plurality of bolt holes 24 are provided at predetermined intervals in the vertical direction at both lateral ends of the slide plate body 21, through which fastening bolts 62 pass to abut the seal plate 1 against the slide plate 2. In this example, two rows of bolt holes 24 are arranged horizontally, each spaced apart vertically. In FIG. 2 , to distinguish the bolt holes 24, they are labeled, from top to bottom, as a first bolt hole 241, a second bolt hole 242, a third bolt hole 243, and a fourth bolt hole 244. A plurality of stud bolt holes 26 are provided vertically at predetermined intervals in the slide plate body 21, through which stud bolts pass. In this example, two rows of four stud bolt holes 26 are arranged horizontally, each spaced apart horizontally. The stud bolt holes 26 are installed laterally inward of the bolt holes 24. The number of stud bolt holes 26 is fewer than the number of bolt holes 24.

[0030] To suppress deformation of the seal plate 1, it is important to suppress deformation of the slide plate 2. Therefore, the slide plate 2 of this embodiment has horizontal ribs 22 that protrude in the thickness direction from the slide plate main body 21 toward the outside of the furnace and extend laterally. The presence of the horizontal ribs 22 increases the lateral rigidity of the slide plate 2, thereby suppressing deformation of the slide plate 2. As shown in FIG. 2 , the slide plate main body 21 is provided with multiple horizontal ribs 22 at predetermined intervals in the vertical direction. In this example, the horizontal ribs 22 are steel strip-shaped members extending in the horizontal and thickness directions. In FIGS. 2 and 3 , the multiple horizontal ribs 22 are distinguished from one another by being labeled, from top to bottom, as a first horizontal rib 221, a second horizontal rib 222, a third horizontal rib 223, and a fourth horizontal rib 224.

[0031] If the horizontal rib 22 were positioned so as to overlap with the bolt holes 24 in the vertical direction, the horizontal rib 22 would interfere, making it difficult to pass the fastening bolts 62 through. Therefore, in the slide plate 2 of this embodiment, the horizontal rib 22 is positioned in a vertical position so as not to overlap with multiple bolt holes 24. In other words, the horizontal rib 22 is positioned in a vertical position between two adjacent bolt holes 24. This positioning reduces the possibility of the horizontal rib 22 interfering with the fastening bolts 62.

[0032] As shown in FIG. 2( b), the first transverse rib 221, the second transverse rib 222, the third transverse rib 223, and the fourth transverse rib 224 are positioned in the vertical direction to avoid the first bolt hole 241, the second bolt hole 242, the third bolt hole 243, and the fourth bolt hole 244 and not overlap these bolt holes. Furthermore, the second transverse rib 222 is positioned approximately midway between the adjacent first bolt hole 241 and the adjacent second bolt hole 242. Furthermore, the third transverse rib 223 is positioned approximately midway between the adjacent second bolt hole 242 and the adjacent third bolt hole 243. Furthermore, the fourth transverse rib 224 is positioned approximately midway between the adjacent third bolt hole 243 and the adjacent fourth bolt hole 244. As shown in FIG. 2( a), the other transverse ribs 22 are positioned in a similar manner.

[0033] Increasing the lateral rigidity of the slide plate 2 may change the balance with the longitudinal rigidity, concentrating distortion due to thermal stress in the longitudinal direction and increasing warpage in the longitudinal direction. Therefore, in this embodiment, the slide plate 2 has longitudinal ribs 23 that protrude in the thickness direction from the slide plate body 21 and extend in the longitudinal direction. The longitudinal ribs 23 are arranged laterally outward of the transverse ribs 22. This arrangement improves the balance between lateral rigidity and longitudinal rigidity. In this example, the longitudinal ribs 23 are steel strip-shaped members extending in the longitudinal and thickness directions. The longitudinal ribs 23 may include a single longitudinal rib body or multiple longitudinal rib bodies. In the example shown in FIG. 2(a), one longitudinal rib 23 is arranged on each side of the transverse rib 22, and each longitudinal rib 23 is composed of multiple (three in this example) first longitudinal rib bodies 231, second longitudinal rib bodies 232, and third longitudinal rib bodies 233 arranged in the longitudinal direction.

[0034] The horizontal ribs 22 may be arranged at a distance from the vertical ribs 23 with a gap therebetween, but in the example of FIG. 4, the horizontal ribs 22 are continuous with the vertical ribs 23. In this case, deformation due to thermal expansion can be further suppressed. The horizontal ribs 22 may be joined to the vertical ribs 23 by welding or the like, or may not be joined at all. In the example of FIG. 4, the second horizontal rib 222 is joined to the two first vertical rib bodies 231 arranged at a distance in the horizontal direction by welding between these vertical rib bodies.

[0035] As shown in Fig. 2, the slide plate body 21 is provided with a plurality of slide members 31 that can slide relative to the furnace cover frame 5 provided on the furnace exterior side of the slide plate 2. In the example of Fig. 2(a), two rows of slide members 31 are arranged horizontally, spaced apart, with each row arranged at a predetermined interval in the vertical direction. The slide members 31 are joined to the main surface of the slide plate body 21 on the furnace exterior side by welding or the like.

[0036] In the example of FIG. 5, the slide member 31 has an angular pipe shape with an opening 312 extending vertically on the outside of the furnace. In other words, the slide member 31 has an angular C-shaped cross section. The slide member 31 surrounds a slide body 51 fixed to the extending end of an extension body 52 extending from the furnace cover frame 5 toward the inside of the furnace. In particular, the slide body 51 has a substantially rectangular parallelepiped shape that is flat in the thickness direction, and the slide member 31 has a rectangular parallelepiped space capable of accommodating the slide body 51. The slide member 31 and the slide body 51 have a gap that allows them to slide vertically relative to each other. The extension body 52 has a shape that allows it to pass through the opening 312 and slide vertically within the opening 312. The slide member 31 functions as a rail that guides the slide body 51, and the slide body 51 functions as a runner guided by this rail.

[0037] In this example, the extension body 52 has a hollow cylindrical shape extending in the thickness direction. Connecting bolts 53 penetrate the furnace cover frame 5 and the extension body 52 in the thickness direction from the outside of the furnace and are fastened to the slide body 51. With this configuration, the slide body 51 is supported by the furnace cover frame 5.

[0038] As shown in Figures 2 and 5, the transverse rib 22 is disposed between a pair of left and right slide members 31 spaced apart in the horizontal direction. The transverse rib 22 may be disposed apart from the slide members 31, but in the example of Figure 5, the transverse rib 22 is continuous with the slide members 31. In this case, deformation due to thermal expansion can be further suppressed. The transverse rib 22 may be joined to the slide members 31 by welding or the like, or may not be joined.

[0039] 2 and 5, the vertical ribs 23 are arranged laterally outward of the slide member 31. The vertical ribs 23 may be arranged apart from the slide member 31 with a gap therebetween, but in this example, the vertical ribs 23 are continuous with the slide member 31. In this case, deformation due to thermal expansion can be further suppressed. The vertical ribs 23 may be joined to the slide member 31 by welding or the like, or may not be joined.

[0040] If the protruding dimension H1 of the horizontal rib 22 from the slide plate main body 21 is too small, the deformation suppression effect will be reduced. If this protruding dimension H1 is too large, the manufacturing cost will be high. Therefore, in this embodiment, the protruding dimension H1 of the horizontal rib 22 from the slide plate main body 21 is equal to or less than the protruding dimension H3 of the slide member 31 from the slide plate main body 21 and is equal to or greater than the thickness dimension H4 of the slide plate main body 21. Within this range, the deformation suppression effect can be ensured while suppressing the manufacturing cost. As an example, when the thickness dimension H4 of the slide plate main body 21 is 16 mm, the protruding dimension H1 of the horizontal rib 22 can be set to be equal to or greater than 20 mm and equal to or less than the protruding dimension H3 of the slide member 31.

[0041] The protruding dimension H2 of the vertical rib 23 from the slide plate body 21 may be substantially the same as the protruding dimension H1 of the horizontal rib 22.

[0042] The features of the furnace lid 10 of this embodiment configured as described above will be described. The furnace lid 10 is a furnace lid capable of closing the furnace mouth 84 of a coke oven 100, and includes a seal plate 1 provided with a knife edge portion 12 for abutting against the furnace frame 82 of the furnace mouth 84, and a slide plate 2 placed on the furnace outer side of the seal plate 1. The slide plate 2 has a slide plate body 21 and a horizontal rib 22 that protrudes from the slide plate body 21 in the thickness direction and extends in the short direction of the furnace mouth 84.

[0043] According to this configuration, the presence of the lateral ribs 22 suppresses lateral deformation of the slide plate 2, and thus suppresses deformation of the seal plate 1. As a result, it is possible to improve sealing performance without increasing the number of stud bolts, thereby achieving good maintainability.

[0044] The above describes in detail exemplary embodiments of the present invention. The above-described embodiments merely illustrate specific examples of implementing the present invention. The content of the embodiments does not limit the technical scope of the present invention, and many design modifications, such as changes, additions, and deletions of components, are possible within the scope of the inventive concept defined in the claims. In the above-described embodiments, content that allows such design modifications is described using notations such as "in the embodiment" or "in the embodiment," but design modifications are also permitted for content not otherwise specified. Furthermore, hatching on cross sections in the drawings does not limit the material of the hatched object.

[0045] The following describes modified examples. In the drawings and descriptions of the modified examples, the same or equivalent components and members as those in the embodiment are denoted by the same reference numerals. Explanations that overlap with the embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the embodiment.

[0046] (Variation) In the description of the embodiment, an example has been shown in which the slide member 31 is a rail that guides the slide body 51, but the present invention is not limited to this. The slide member may be configured as a runner that is guided by the slide body.

[0047] In the description of the embodiment, an example has been shown in which the vertical ribs 23 are arranged on the outer side of the slide member 31 in the lateral direction, but the present invention is not limited to this. The vertical ribs may also be arranged on the inner side of the slide member in the lateral direction.

[0048] In the description of the embodiment, an example has been shown in which the horizontal ribs 22 and the vertical ribs 23 are strip-shaped, but they may have other shapes other than strip-shaped, such as rod-shaped or pipe-shaped.

[0049] In the description of the embodiment, an example has been shown in which one vertical rib 23 is arranged on each side of the horizontal rib 22, but the present invention is not limited to this. Three or more vertical ribs may be arranged, and the vertical ribs 23 and the horizontal ribs 22 may be arranged to intersect with each other in a lattice pattern.

[0050] In the description of the embodiment, an example has been shown in which the slide plate main body 21, horizontal ribs 22, vertical ribs 23, slide member 31, and bolt holes 24 are each arranged symmetrically as shown in Fig. 2, but the present invention is not limited to this. Any of the slide plate main body 21, horizontal ribs 22, vertical ribs 23, slide member 31, and bolt holes 24 may be arranged asymmetrically. Furthermore, the horizontal ribs 22 do not have to be perfectly perpendicular to the vertical ribs 23; a slight inclination is permitted.

[0051] The above-described modifications have the same functions and effects as the embodiment.

[0052] Any combination of the components and modifications of the above-described embodiments is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the combined effects of the combined embodiments and modifications. [Explanation of symbols]

[0053] 1 seal plate, 2 slide plate, 4 furnace inner plate, 5 furnace cover frame, 6 refractory brick, 10 furnace cover, 11 seal plate body, 12 knife edge portion, 21 slide plate body, 22 horizontal rib, 23 vertical rib, 24 bolt hole, 31 slide member, 61 refractory brick body, 62 fastening bolt, 82 furnace frame, 84 kiln mouth, 100 coke oven.

Claims

1. A furnace cover capable of closing the mouth of a coke oven, A seal plate having a knife edge portion joined to its outer periphery to contact the furnace frame of the kiln mouth; a slide plate disposed on the outer side of the seal plate; an in-furnace plate provided on the furnace inner side of the seal plate so as to overlap the seal plate, one main surface of which abuts against the main surface of the seal plate and the other main surface of which abuts against the refractory bricks; Equipped with The slide plate has a slide plate body, a horizontal rib protruding from the slide plate body in the thickness direction and extending in the short direction of the kiln opening, and a vertical rib protruding from the slide plate body in the thickness direction and extending in the longitudinal direction of the kiln opening, and arranged laterally outside the horizontal rib. The slide plate body has a plurality of bolt holes through which bolts for abutting the seal plate against the slide plate are passed, and a plurality of stud bolt holes through which stud bolts for integrating the slide plate, the seal plate, and the furnace inner plate are passed, which are provided at predetermined intervals in the longitudinal direction of the kiln mouth; At the longitudinal position, the transverse rib is disposed at a position not overlapping with the plurality of bolt holes, the number of the plurality of stud bolt holes is less than the number of the plurality of bolt holes; The furnace cover has a dimension in which, when viewed from the front, the seal plate extends vertically from both the top and bottom of the slide plate and extends horizontally from both the left and right sides of the slide plate.

2. The furnace cover according to claim 1 , wherein the horizontal ribs are continuous with the vertical ribs.

3. The slide plate body is provided with a plurality of slide members that are slidable relative to a furnace cover frame that is overlapped with the slide plate on the furnace outer side, The furnace cover according to claim 1 or 2, wherein the horizontal rib is arranged between two of the plurality of slide members that are arranged apart in the short direction of the kiln opening.

4. The furnace cover according to claim 3 , wherein the transverse rib is continuous with the two slide members.

5. A furnace cover as described in claim 3 or 4, wherein the protruding dimension of the horizontal rib from the slide plate body is equal to or greater than the thickness dimension of the slide plate body and is equal to or less than the protruding dimension of the slide member from the slide plate body.

Images