JP2015078267A - Attachment adjusting structure for coke oven protective plate and adjusting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment adjusting structure for a coke oven protective plate and an adjusting method which enable accurate and easy adjustment of an installation position of a protective plate in a stage of piling bricks for a combustion chamber, in constructing a brick structure of a chamber oven type coke oven.SOLUTION: An adjusting method comprises providing a hole (protective plate screw hole 11) formed with a female screw in a surface facing the backstay 1 of a coke oven protective plate 2, forming a through hole 12 in the surface of the backstay 1 facing the protective plate 2, screwing a bolt 13 to the protective plate screw hole 11 through penetration of the through hole 12, screwing two nuts (push nut 15 and pull nut 14) to the bolt 13, arranging the nuts on both sides of the through hole 12 of the backstay and adjusting the positions of the nuts in the bolt 13 so as to adjust the attachment positions of the protective plate 2. A sufficient holding power is secured, and the bolt is never detached unintentionally from the protective plate 2. The method allows an unskilled worker to do safe work.

Description

  The present invention relates to an attachment adjustment structure and an attachment adjustment method for a protective plate of a chamber furnace type coke oven.

  In the chamber furnace type coke oven, the lower stage of the furnace is a heat storage chamber, and the carbonization chamber and the combustion chamber are alternately arranged on the upper stage of the furnace. The longitudinal direction of the carbonization chamber is referred to as the furnace length direction, and the direction in which the carbonization chamber and the combustion chamber are alternately arranged is referred to as the furnace group length direction. The portion between the lower heat storage chamber and the upper carbonization chamber and combustion chamber is called the bellows portion. The heat storage chamber, the carbonization chamber, the combustion chamber, and the bellows portion are brick structures that are built by brickwork, each of which is heated during operation of the coke oven, and the furnace body expands thermally.

  FIG. 11 shows a cross-sectional view in the furnace length direction 61 of the coke oven (cut along the combustion chamber 6). In the brick structure, a heat storage chamber 4, a bellows portion 5, and a combustion chamber 6 are formed from below. Backstays 1 for applying a furnace clamping force to the brick structure are disposed at both ends of the brick structure 3 in the furnace length direction. The backstay 1 is disposed on the surface facing each combustion chamber 6 in the furnace group length direction, and a protective plate 2 is provided between the backstay and the combustion chamber brick structure. The protective plate 2 is usually made of a casting, and in a furnace having a furnace height of 6.5 m, the height is about 8 m, and a refractory heat-insulating castable is lined therein and has a mass of about 3.5 tons.

  The lower end of the backstay 1 is fastened to the foundation concrete by a lower cross tie rod 8, and a furnace clamping spring 9 for adjusting the furnace clamping force is installed between the backstay 1 and the lower cross tie rod 8. The upper end portion of the backstay 1 is connected to the backstays on both sides in the furnace length direction by the upper cross tie rod 7, and a furnace clamping spring 9 for adjusting the furnace clamping force is provided between the backstay 1 and the upper cross tie rod 7. It is installed (for example, Patent Document 1).

  When building a brick structure for a coke oven, a backstay is first built, and then a heat storage chamber and a bellows portion of the brick structure are built. Next, a protection plate is attached to the backstay, and then brickwork of the carbonization chamber and the combustion chamber is built. As a reference for building a brick structure, a furnace core 63 is defined at the center position in the furnace length direction as shown in FIG. Since the protective plate is a standard for combustion chamber brickwork, when attaching the protective plate to the backstay, the height direction of the protective plate is vertical, and the furnace length direction is accurately attached from the furnace core 63 to the position as shown in the drawing. There is a need. The accuracy of adjustment of the protective plate in the furnace length direction is required to be within ± 2 mm.

  In the combustion chamber brick building stage, the backstay is not furnace-clamped and is installed vertically. The position of the backstay in the furnace length direction is not good enough to satisfy the mounting accuracy of the protective plate to be subsequently mounted. Therefore, when attaching the protection plate to the backstay, it is necessary to accurately adjust the position from the furnace core 63 to the protection plate so that the attachment accuracy of the protection plate is within ± 2 mm.

  In addition, after accurately adjusting the position of the protection plate as described above, the brickwork of the combustion chamber and the carbonization chamber was built, and after the brickwork construction was completed, the mechanism for attaching the protection plate to the backstay was removed, Tighten the back stays on both sides of the furnace length with upper cross tie rods so that the back stays are in close contact with the protective plate, and press the protective plate against the brick structure.

JP 2004-137336 A

  Conventionally, various methods have been adopted in order to accurately adjust the mounting accuracy of the protective plate when the protective plate is attached to the backstay in the combustion chamber brick building stage. For example, adjusting the mounting position of the protective plate by providing a screw hole in the surface facing the protective plate of the backstay, screwing a push bolt into this screw hole, and adjusting the protruding amount of the push bolt on the protective plate installation side Has been done. In this method, the push bolt only acts in the direction of pushing the protective plate, and the action of attracting and holding the protective plate to the backstay needs to be secured by another mechanism. For this reason, for example, in order to attract the protective plate to the backstay side, a bracket and a hook bolt attached thereto are provided. The bracket is temporarily welded to the backstay, and the hook bolt is hooked on the protective plate and pulled to the backstay side. However, it is necessary to weld the bracket to the backstay, and when removing the bracket, it is necessary to repaint the welded portion cleanly. Further, since the hook bolt is easily detached from the protective plate, it is necessary to pay close attention so that the protective plate does not fall down, and since the work is complicated, an operation by a skilled worker is essential.

  The present invention provides a coke oven protection plate mounting adjustment structure capable of accurately and easily adjusting the installation position of the protection plate in the combustion chamber brick building stage when building the brick structure of the chamber furnace type coke oven, and An object is to provide a method for adjusting the mounting.

That is, the gist of the present invention is as follows.
(1) The coke oven protection plate has a hole on the surface facing the back stay (hereinafter referred to as “protection plate screw hole”), and the back stay has a through hole on the surface facing the protection plate. And a bolt screwed into the protective plate screw hole through the through hole, and two nuts are screwed to the bolt, and the two nuts are on both sides of the through hole of the backstay. Coke oven protective plate mounting adjustment structure, characterized by being arranged in
(2) The coke oven protection plate attachment adjustment structure according to (1), wherein the protection plate screw hole and the through hole of the backstay are provided at a plurality of positions in the height direction of the protection plate.
(3) The coke oven protective plate has a hole with a female screw formed on the surface facing the backstay (hereinafter referred to as “protective plate screw hole”), and the backstay has a through hole on the surface facing the protective plate. And a pulling bolt that passes through the through hole and is screwed into the protective plate screw hole. A pulling nut is screwed into the pulling bolt, and the pulling nut is opposite to the protective plate of the through hole of the backstay. Placed on the side
There is a hole (hereinafter referred to as “backstay screw hole”) with a female screw formed on the surface of the backstay that faces the protective plate, and a push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. Coke oven protective plate mounting adjustment structure characterized by the above.
(4) The coke oven protection plate has a hole with a female screw formed on the surface facing the back stay (hereinafter referred to as “protection plate screw hole”), and the back stay has a through hole on the surface facing the protection plate. And having a pulling bolt that penetrates through the through hole and is screwed to a halfway depth of the protective plate screw hole,
There is a hole (hereinafter referred to as “backstay screw hole”) with a female screw formed on the surface of the backstay that faces the protective plate, and a push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. Coke oven protective plate mounting adjustment structure characterized by the above.
(5) The protective plate screw hole, the backstay through-hole, and the backstay screw hole are provided at a plurality of positions in the height direction of the protective plate, as described in (3) or (4) above Coke oven protective plate mounting adjustment structure.
(6) A hole in which a female screw is formed on the surface facing the back stay of the coke oven protection plate (hereinafter referred to as “protection plate screw hole”) is provided, and a through hole is provided on the surface of the back stay facing the protection plate. A bolt is screwed into the protective plate screw hole through the through hole, and two nuts are screwed to the bolt, and the two nuts are arranged on both sides of the through hole of the backstay, A coke oven protection plate attachment adjustment method, wherein the attachment position of the protection plate is adjusted by adjusting the positions of the two nuts in the bolt.
(7) The coke oven protection plate attachment adjustment method according to (6), wherein the protection plate screw hole and the through hole of the backstay are provided at a plurality of locations in the height direction of the protection plate.
(8) A hole in which a female screw is formed on the surface of the coke oven protection plate facing the back stay (hereinafter referred to as “protection plate screw hole”) is provided, and a through hole is provided on the surface of the back stay facing the protection plate. A pulling bolt is screwed into the protective plate screw hole through the through hole, a pulling nut is screwed into the pulling bolt, and the pulling nut is arranged on the opposite side of the backstay through hole protective plate,
A hole with a female thread is formed on the surface facing the protective plate of the backstay (hereinafter referred to as “backstay screw hole”). A push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. A coke oven protection plate attachment adjustment method, wherein the attachment position of the protection plate is adjusted by adjusting a pull nut position and a screw bolt insertion position.
(9) A hole in which a female screw is formed on the surface facing the back stay of the coke oven protection plate (hereinafter referred to as “protection plate screw hole”) is provided, and a through hole is provided on the surface of the back stay facing the protection plate. Screw the pulling bolt through the through-hole to a halfway depth of the protective plate screw hole,
A hole with a female thread is formed on the surface facing the protective plate of the backstay (hereinafter referred to as “backstay screw hole”). A push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. A coke oven protection plate attachment adjustment method, wherein the attachment position of the protection plate is adjusted by adjusting the screwing position and the screwing position of the push bolt.
(10) The protective plate screw hole, the backstay through hole, and the backstay screw hole are provided at a plurality of height direction locations of the protective plate, as described in (8) or (9) above Coke oven protective plate installation adjustment method.

  In the present invention, the coke oven protection plate mounting adjustment structure and the mounting adjustment method are capable of holding the protective plate on the backstay by simply passing the through hole of the backstay and screwing the bolt into the protective plate screw hole. In addition, there is no need for tack welding of brackets or repainting of the welded part after completion, ensuring sufficient holding power by screwing the bolt into the protective plate screw hole with the required length, and the bolt unexpectedly comes off the protective plate There is nothing. Therefore, it is possible to perform work safely without a skilled worker.

It is a figure which shows embodiment of this invention, (a) is a side view of a backstay and a protection board part, (b) is a BB arrow partial sectional view. It is a fragmentary sectional view showing the 1st embodiment of the present invention. It is a fragmentary sectional view showing the 1st embodiment of the present invention. It is a fragmentary sectional view showing the 1st embodiment of the present invention. It is a fragmentary sectional view showing the 2nd embodiment of the present invention, (a) (c) is a sectional view of a through hole and a protection board screw hole part, and (b) (d) is a backstay screw hole part. . It is a fragmentary sectional view which shows the 2nd Embodiment of this invention. It is a fragmentary sectional view showing a 3rd embodiment of the present invention, (a) (c) is a sectional view of a through hole and a protection board screw hole part, and (b) and (d) are backstay screw hole parts. . It is a fragmentary sectional view which shows the 3rd Embodiment of this invention. It is a figure which shows embodiment of this invention, (a) is a side view of a backstay and a protection board part, (b) is B partial enlarged view. It is a fragmentary perspective view which shows the condition where the heat storage chamber and the bellows part were constructed | assembled among the coke oven refractories. It is a furnace length direction sectional view of a coke oven.

  When building a brick structure for a coke oven, a backstay is first built, and then a heat storage chamber and a bellows part of the brick structure are built. At this stage, the backstay 1 is not fastened in the furnace and is built vertically (see FIG. 10). At this stage, a protective plate is arranged along the back stay, and the protective plate is fixed to the back stay. The brickwork of the carbonization chamber and combustion chamber is then built. Since the protective plate is a standard for combustion chamber brickwork, when attaching the protective plate to the backstay, the height direction of the protective plate is vertical, and the furnace length direction is accurately attached from the furnace core 63 to the position as shown in the drawing. There is a need. The accuracy of adjustment of the protective plate in the furnace length direction is required to be within ± 2 mm.

  After the brick-laying of the coke oven is completed, the furnace body is closed with a cross tie rod, and the backstay and the protection plate come into contact with each other. On the other hand, in the combustion chamber brick building stage, the furnace is not closed and a space is provided between the backstay and the protection plate. The position of the backstay in the furnace length direction is determined so that a distance adjustment allowance of about 10 mm can be secured.

  The attachment adjustment structure and attachment adjustment method of the coke oven protection plate of the present invention can be classified into three embodiments. Hereinafter, embodiments will be described in order.

  A first embodiment will be described below with reference to FIGS. In the example shown in FIG. 1A, the backstay 1 and the protection plate 2 are fixed by three bolts 13. FIG. 1B is a partial cross-sectional view taken along the line B-B, and a part of the protective plate 2 is illustrated. The protection plate 2 includes a casting part 2a and a fireproof and heat-insulating castable part 2b.

  In the coke oven protection plate mounting adjustment structure of the first embodiment, as shown in FIGS. 1B and 2A, a female screw is formed on the surface of the coke oven protection plate 2 facing the backstay. A through hole 12 is provided on the surface of the backstay 1 that faces the protection plate. When the protection plate is arranged on the backstay and the position in the furnace height direction is determined, the protection plate screw hole 11 and the backstay through-hole 12 are provided at positions where both axes face each other coaxially. The bolt 13 has a bolt 13 that passes through the through hole 12 and is screwed into the protective plate screw hole 11. Two nuts (14, 15) are screwed to the bolt 13, and the two nuts are connected to the backstay 1. It arrange | positions at the both sides of the through-hole 12 of this. Among the two nuts, the nut closer to the protective plate is called the push nut 15, and the other nuts are called the pull nuts 14. As shown in FIG. 3 (a), the distance between the backstay 1 and the protective plate 2 is increased by turning the push nut 15 and moving it away from the protective plate (the direction of the arrow in FIG. 3 (a)). To move). As shown in FIG. 2 (b), the distance between the backstay and the protective plate is made closer by turning the pull nut 14 and moving it toward the protective plate 2 (moving in the direction of the arrow in FIG. 2 (b)). ) The positions of the push nut 15 and the pull nut 14 are adjusted, and finally, the push nut 15 and the pull nut 14 are fixed in close contact with both sides of the through hole 12 of the back stay (FIG. 3B), whereby the back The position of the protection plate 2 with respect to the stay 1 can be determined.

  When adjusting the position by turning the push nut 15 and the pull nut 14, if the bolt 13 is pulled and turned, there is a problem in the adjustment. A method is used that keeps the bolt head from rotating when the nut is turned. Alternatively, the bolt may be fixed by being screwed to the innermost part of the protective plate screw hole. Alternatively, as shown in FIG. 4 (a), a fixing nut 40 is added to the bolt 13, the fixing nut 40 is inserted between the push nut 15 and the protective plate 2, and the fixing nut 40 is turned to the protective plate side to turn the bolt 13 on. It can also be fixed to the protective plate 2. As shown in FIG. 4B, a bolt having no head may be used as the bolt 13.

  As described above, in the method for adjusting the attachment of the coke oven protection plate according to the first embodiment, a hole (protection plate screw hole 11) in which a female screw is formed on the surface of the coke oven protection plate 2 facing the backstay. ), A through hole 12 is provided on the surface of the backstay 1 facing the protective plate, a bolt 13 is screwed into the protective plate screw hole 11 through the through hole 12, and the bolt 13 has two nuts ( 14, 15) are screwed, the two nuts are arranged on both sides of the through hole 12 of the backstay, and the mounting position of the protective plate 2 is adjusted by adjusting the position of the two nuts in the bolt 13 can do. The two nuts are a push nut 15 and a pull nut 14, and the position adjustment of the two nuts is as described above.

  In adjusting the position of the protective plate, it is necessary to ensure the parallelism of the protective plate in the furnace group length direction. In order to ensure the parallelism in the furnace length direction, it is preferable to provide protective plate screw holes at different positions in the furnace length direction of the protection plate so that the respective positions in the furnace length direction can be adjusted. Specifically, as shown in FIG. 1B, protective plate screw holes 11 are provided at two positions on the left and right when the protective plate is erected at the same position in the height direction. The corresponding backstay through-holes 12 are also provided at two positions on the left and right sides of the backstay. In the second and third embodiments described later, backstay screw holes are also provided at two positions on the left and right.

  In the first embodiment, it is preferable that the protective plate screw holes and the through holes of the backstay are provided at a plurality of locations in the height direction of the protective plate. By providing one place near the upper end and the lower end of the protective plate, the position in the furnace length direction can be specified in the longitudinal direction of the protective plate. Furthermore, as shown to Fig.1 (a), it is more preferable by providing also in the intermediate position between an upper end and a lower end and making it a total of three places, since the curvature of a furnace length direction can be adjusted in the longitudinal direction of a protective plate.

  A second embodiment will be described below with reference to FIGS.

  In the adjustment adjustment structure of the coke oven protection plate according to the second embodiment, as shown in FIGS. 5 (a) and 5 (c), the surface of the coke oven protection plate 2 facing the backstay is the first embodiment. Similarly, a hole (protective plate screw hole 11) in which a female screw is formed is provided, and a through hole 12 is provided on the surface of the backstay 1 facing the protective plate. The pulling bolt 33 is screwed into the protective plate screw hole 11 through the through hole 12, and a pulling nut 34 is screwed into the pulling bolt 33, and the pulling nut 34 is the protective plate 2 of the through hole 12 of the backstay. And placed on the opposite side. In the second embodiment, in addition to the structure of the first embodiment, as shown in FIGS. 5B and 5D, a hole (back surface) in which a female screw is formed on the surface facing the protection plate of the backstay. There is a stay screw hole 21), and a push bolt 22 is screwed into the back stay screw hole 21 from the opposite side of the protective plate. The pulling nut 34 screwed into the pulling bolt 33 is rotated and moved in a direction approaching the protective plate, thereby making the distance between the backstay 1 and the protective plate 2 closer. By rotating the push bolt 22 to increase the protruding length of the push bolt 22 on the protection plate side, the distance between the backstay 1 and the protection plate 2 is increased. The positions of the pull nut 34 and the push bolt 22 are adjusted, and finally the pull nut 34 comes into close contact with the through hole 12 of the backstay (FIG. 5A) and the push bolt 22 comes into close contact with the protective plate 2 and is fixed. By doing (FIG.5 (b)), the position of the protection board 2 with respect to the backstay 1 can be decided.

  In addition, when screwing a pulling bolt into the protective plate screw hole, a method of screwing and fixing the pulling bolt to the back of the protective plate screw hole can be employed. The pull bolt may not be fixed by screwing it into the protective plate screw hole, but the head of the pull bolt may be pressed so that the pull bolt does not rotate when the pull nut is rotated. Alternatively, as shown in FIG. 6A, a method of fixing the pulling bolt 33 to the protective plate 2 by screwing the fixing nut 40 into the pulling bolt 33 and bringing the fixing nut 40 into close contact with the protective plate 2 may be adopted. . A bolt having no head may be used as the pulling bolt 33 as shown in FIG.

  As described above, in the method of adjusting the attachment of the coke oven protection plate according to the second embodiment, a hole (protection plate screw hole 11) in which a female screw is formed on the surface of the coke oven protection plate 2 facing the backstay. ), A through hole 12 is provided on the surface of the backstay 1 facing the protective plate, a pull bolt 33 is screwed into the protective plate screw hole 11 through the through hole 12, and a pull nut 34 is attached to the pull bolt 33. The pull nut 34 is disposed on the side opposite to the protection plate of the through hole 12 of the backstay, and a hole (backstay screw hole 21) in which a female screw is formed on the surface facing the protection plate of the backstay 1 is provided. The backstay screw hole 21 is screwed with a push bolt 22 from the opposite side of the protective plate, and the position of the pull nut 33 of the pull bolt 33 and the screwed position of the push bolt 22 are adjusted to remove the protective plate 2. It can be adjusted only position. The position adjustment of the pull nut 34 and the push bolt 22 is as described above.

  A third embodiment will be described below with reference to FIGS.

  In the adjustment adjustment structure of the coke oven protection plate of the third embodiment, as shown in FIGS. 7A and 7C, a hole (in which a female screw is formed on the surface facing the back stay of the coke oven protection plate 2 ( It has a protective plate screw hole 11) and a through hole 12 on the surface of the backstay 1 that faces the protective plate. It has a pulling bolt 23 that passes through the through-hole 12 and is screwed to a halfway depth of the protective plate screw hole 11. In the third embodiment, as in the second embodiment, as shown in FIGS. 7B and 7D, a hole (backstay) in which a female screw is formed on the surface facing the protective plate of the backstay 1 is used. The back stay screw hole 21 is screwed with a push bolt 22 from the side opposite to the protective plate. The pulling bolt 23 is turned to change the screwing allowance into the protective plate screw hole 11, and the pulling bolt 23 is moved in a direction to approach the protective plate 2, thereby reducing the distance between the backstay 1 and the protective plate 2. Do. By rotating the push bolt 22 to increase the protruding length of the push bolt 22 on the protection plate side, the distance between the backstay 1 and the protection plate 2 is increased. The positions of the pull bolt 23 and the push bolt 22 are adjusted, and finally the head of the pull bolt 23 comes into close contact with the through hole 12 of the backstay (FIG. 7A) and the push bolt 22 comes into close contact with the protective plate 2. The position of the protection plate 2 with respect to the back stay 1 can be determined by fixing (Fig. 7 (b)). As shown in FIG. 8A, a fixing nut 40 may be provided in the middle of the pulling bolt 23, and the position of the fixing nut 40 may be adjusted by bringing the head of the fixing nut 40 into close contact with the through hole 12 of the backstay. In this case, the fixing nut may be fixed as a double nut. As shown in FIG. 8B, a bolt having no head may be used as the pulling bolt 23.

  As described above, in the method of adjusting the attachment of the coke oven protection plate according to the third embodiment, a hole (protection plate screw hole 11) in which a female screw is formed on the surface of the coke oven protection plate 2 facing the backstay. ), A through hole 12 is provided on the surface of the backstay 1 facing the protective plate, and a pulling bolt 23 is screwed through the through hole 12 to a halfway depth of the protective plate screw hole 11 to the protective plate of the backstay 1. A hole (back stay screw hole 21) in which an internal thread is formed is provided on the facing surface, and a push bolt 22 is screwed into the back stay screw hole 21 from the side opposite to the protective plate. The mounting position of the protection plate 2 can be adjusted by adjusting the screwing position. The position adjustment of the pull bolt 23 and the push bolt 22 is as described above.

  In the second and third embodiments, it is preferable that the protective plate screw hole, the backstay through hole, and the backstay screw hole are provided at a plurality of positions in the height direction of the protective plate. By providing one place near the upper end and the lower end of the protective plate, the position in the furnace length direction can be specified in the longitudinal direction of the protective plate. Furthermore, it is more preferable to provide three intermediate positions between the upper end and the lower end, since the warpage in the furnace length direction can be adjusted in the longitudinal direction of the protective plate.

  A method for adjusting the position of the protective plate common to the first to third embodiments will be described. Brickwork has been completed for the heat storage chamber and the bellows. The backstay is also attached without furnace tightening.

  In any of the first to third embodiments, since the bolt is inserted from the through hole of the backstay and the bolt is screwed into the protective plate screw hole of the protective plate, the central axis of the through hole and the protective plate screw hole is almost It is necessary to be located on the same axis. By finely adjusting the height of the protective plate, the installation positions of both are arranged so that the positions of the through hole and the protective plate screw hole coincide. About the height direction of a protection board, as shown to Fig.1 (a), it can fix by installing the protection board 2 on the brick structure 3 of a bellows part. In this case, fine adjustment in the height direction can be performed by providing a liner between the brick structure 3 and the protective plate 2. Alternatively, as shown in FIG. 9 (a), a receiving projection 52 for receiving the protection plate is provided at the lower portion of the back stay facing the protection plate, and at the lower portion of the protection plate facing the back stay. Alternatively, the protective plate protrusion 51 may be provided, and the protective plate protrusion 51 may be placed on the receiving protrusion 52 to determine the height direction of the protective plate. Use a crane or chain block to move the protective plate to the position where the protective plate is located near the backstay and fix the approximate position.

  Hereinafter, based on the first embodiment, a protective plate attachment adjustment structure and attachment adjustment method having a mass of about 3.5 tons will be described (FIGS. 1 to 4). For example, about M20 is suitable for the bolt 13, the protective plate screw hole 11, and the nut screw. The female screw formation depth of the protective plate screw hole 11 is 30 mm or more, preferably about 70 mm. It is preferable that the screwing depth of the bolt 13 into the protective plate screw hole 11 is about 30 mm or more and about 50 mm. If the screwing depth of the bolt 13 is 30 mm or more, it is possible to sufficiently secure the holding force when the protective plate is temporarily fixed. In this case, the diameter of the through hole 12 of the backstay is preferably about 30 mmφ. The length of the bolt 13 is about 190 mm.

  In order to adjust the installation position of the protective plate in the furnace length direction, the reference position needs to be accurately grasped. For this reason, for example, as shown in FIG. 10, the piano wire 41 is extended in the furnace group length direction 62 at a position of 100 to 200 mm inside the furnace from the furnace inner surface of the protection plate. The position in the furnace length direction can be determined. In the height direction, it is preferable to extend the piano wire in the furnace group length direction at three locations near the upper end, the center, and the lower end of the protective plate.

  As shown in FIG. 2A, a pull nut 14 is screwed into the bolt 13 to the vicinity of the head of the bolt, and a washer 16 is inserted. In this state, the bolt 13 is inserted into the through hole 12 of the backstay, a washer 16 and a push nut 15 are prepared at the tip of the through hole 12, and the push nut 15 is screwed together with the washer 16 from the tip of the bolt 13. Next, the tip of the bolt 13 is screwed into the protective plate screw hole 11 of the protective plate. Screw the bolt 13 to a predetermined screwing depth into the protective plate screw hole 11, for example, about 50 mm, and then finely adjust the position of the protective plate 2 in the furnace length direction by adjusting the screwing position of the pull nut 14 and the push nut 15. I do. When the piano wire 41 indicating the reference position is extended in the furnace group length direction, the pull nut 14 and the push nut 15 are respectively set so that the distance between the piano wire 41 and the protective plate surface becomes a predetermined distance. It rotates to adjust the position of the bolt 13 in the length direction. When rotating the pull nut and push nut, it is recommended to hold the bolt head so that the bolt is not pulled and rotated. In the position adjustment, when it is necessary to move the protection plate position further from the back stay than the current state, the position of the protection plate 2 is adjusted by turning the push nut 15 as shown in FIG. The pull nut is tightened to tighten the bolt and the back stay firmly (FIG. 3B). If it is necessary to bring the protective plate closer to the backstay than the current state, adjust the position of the protective plate 2 by turning the pull nut 14 as shown in FIG. 2 (b), and then tighten the push nut. The bolt and the back stay are firmly tightened (FIG. 3B). When the position adjustment is completed, the backstay and the protective plate are preferably separated from each other by about 10 mm from the close contact position. Thereby, the furnace plate direction position adjustment allowance of the protection plate can be sufficiently secured. By adjusting the temporary fixing position of the back stay in advance, the adjustment allowance between the back stay and the protection plate can be secured.

  The case where the protective plate screw hole and the through hole of the backstay are provided at three locations in the height direction of the protective plate (near the upper end, the center, and the lower end) as shown in FIG. Fine adjustment of the position of the protective plate in the furnace length direction is appropriately performed for each of the three positions in the height direction. Thereby, the furnace length direction position on the surface of the protective plate is accurately determined with the required accuracy at any position in the height direction.

  After accurately adjusting the position of the protection plate as described above, brickwork of the combustion chamber and the carbonization chamber is constructed based on the position of the protection plate. After these brickwork constructions are finished, the bolt is removed from the protective plate screw hole and the backstay through hole. Thereafter, as shown in FIG. 11, the protection plate is pressed against the brick structure with a predetermined furnace clamping force so that the backstay 1 is in close contact with the protection plate 2.

  When the coke oven is operated and the brick structure is heated to a high temperature, the brick structure is thermally expanded. Since the protective plate is placed on the bellows brick stack, the protective plate rises as the bellows brick thermally expands in the height direction. Therefore, when the coke oven is operating, the protective plate screw hole is raised to a position higher than the backstay through hole, and the protective plate screw hole cannot be observed even when observed from the backstay through hole. .

  Conventionally, when the protection plate is attached to the backstay, if the method of pulling the protection plate to the backstay side by providing the bracket and the hook bolt attached to it is used, the bracket is temporarily welded to the backstay to protect the hook bolt. It was necessary to hook on the board. However, this method requires a large space, and the bracket needs to be welded to the backstay. When the bracket is removed, the welded portion needs to be repainted cleanly. Further, since the hook bolt is easily detached from the protective plate, it is necessary to pay close attention so that the protective plate does not fall down, and work by a group of four skilled workers is essential. In order to prevent the protective plate from falling, it was essential to secure the vicinity of the upper end of the protective plate with a chain.

  On the other hand, in the present invention, it is possible to hold the protective plate on the backstay by simply passing the through hole of the backstay and screwing the bolt into the protective plate screw hole. There is no need to repaint the welded part, and a sufficient holding force is secured by screwing the bolt into the protective plate screw hole with a required length, so that the bolt does not come off the protective plate unexpectedly. Therefore, it is possible to work safely by a pair of two persons without using a skilled worker.

  In constructing the brick structure of the chamber furnace type coke oven, the attachment adjustment structure and the attachment adjustment method of the coke oven protection plate of the present invention were applied. The protective plate is made of a casting, and has a thickness of 150 mm, a width of 850 mm, a height of 8 m, and a mass of about 3.5 tons in the present 6.5 m furnace. As the mounting adjustment structure of the protective plate, the above-described first embodiment is adopted, and the adjustment structure is provided at three positions in the height direction, the upper stage, the center, and the lower stage, and the protective plate screw holes at the left and right positions at each position. And through holes in the backstay. M20 screws were used for the bolts, protective plate screw holes, and nut screws, the female plate formation depth of the protective plate screw holes was 70 mm, and the bolt length was 190 mm. The screwing depth of the bolt into the protective plate screw hole is 50 mm. The diameter of the through hole of the back stay was 30 mmφ.

  Brickwork has been completed for the heat storage chamber and the bellows. Also, the backstay is attached without being furnace-tightened. In order to adjust the installation position of the protective plate in the furnace length direction, the piano wire 41 is extended in the furnace group length direction 62 as shown in FIG. The position of the protective plate in the furnace top direction was determined. In the height direction, piano wires 41 are extended in the furnace group length direction at three locations near the upper end, center, and lower end of the protective plate.

  Lift the protection plate using a crane or chain block, move it to the position where the protection plate is located near the backstay, and fix the approximate position of the protection plate. The height direction of the protection plate is fixed by installing a protection plate projection 51 of the protection plate on the backstay receiving projection 52 provided near the lower end of the backstay, as shown in FIG. 9A. Fine adjustment in the height direction is performed by inserting a liner between the backstay receiving projection 52 and the protective plate projection 51. In this state, the center axis of the through hole of the backstay and the protective plate screw hole is located substantially coaxially.

  A pull nut 14 is screwed into the bolt 13 to the vicinity of the head of the bolt, and a washer 16 is inserted (FIG. 2A). In this state, the bolt 13 is inserted into the through hole 12 of the backstay, and the push nut 15 is screwed together with the washer from the tip of the bolt. Next, the bolt tip is screwed into the protective plate screw hole 11 of the protective plate. Screw the bolt to a predetermined screwing depth (50 mm) into the protective plate screw hole, and then finely adjust the position of the protective plate in the furnace length direction by adjusting the screwing position of the pull nut and push nut. Since the piano wire indicating the reference position is extended in the furnace group length direction, the length of the bolt is increased by rotating the pull nut and the push nut so that the distance between the piano wire and the surface of the protective plate is a predetermined distance. Adjust the vertical position. When rotating the pull nut and push nut, hold the head of the bolt so that the bolt is not pulled and rotated.

  Fine adjustment of the position of the protective plate in the furnace length direction is appropriately performed for each of the three positions in the height direction. Thereby, the furnace length direction position on the surface of the protective plate is accurately determined with the required accuracy at any position in the height direction. Actually, at any position in the height direction of the protective plate, it was possible to adjust the position within ± 2 mm from the predetermined position in the furnace length direction.

  After accurately adjusting the position of the protection plate as described above, brickwork of the combustion chamber and the carbonization chamber is constructed based on the position of the protection plate. After these brickwork constructions are finished, the bolts 13 are removed from the protective plate screw holes 11 and the backstay through holes 12. After that, tighten the cross tie rod, tighten the furnace, and press the backstay against the protective plate.

DESCRIPTION OF SYMBOLS 1 Backstay 2 Protective plate 2a Casting part 2b Refractory heat insulation castable part 3 Brick structure 4 Thermal storage chamber 5 Bellows part 6 Combustion chamber 7 Upper cross tie rod 8 Lower cross tie rod 9 Furnace spring 11 Protection plate screw hole 12 Through hole 13 Bolt 14 Pull nut 15 Push nut 16 Washer 21 Backstay screw hole 22 Push bolt 23 Pull bolt 24 Pull nut 33 Pull bolt 34 Pull nut 40 Fixing nut 41 Piano wire 51 Protection plate protrusion 52 Receiving protrusion 61 Furnace length direction 62 Furnace group length direction 63 Furnace core

Claims (10)

  The surface of the coke oven protection plate facing the back stay has a hole in which an internal thread is formed (hereinafter referred to as “protection plate screw hole”), the surface of the back stay facing the protection plate has a through hole, There is a bolt that passes through the through hole and is screwed into the protective plate screw hole, and two nuts are screwed to the bolt, and the two nuts are arranged on both sides of the through hole of the backstay. Coke oven protective plate mounting adjustment structure, characterized by   The coke oven protection plate attachment adjustment structure according to claim 1, wherein the protection plate screw hole and the through hole of the backstay are provided at a plurality of positions in the height direction of the protection plate. The surface of the coke oven protection plate facing the back stay has a hole in which an internal thread is formed (hereinafter referred to as “protection plate screw hole”), the surface of the back stay facing the protection plate has a through hole, It has a pull bolt that passes through the through hole and is screwed into the protective plate screw hole, and a pull nut is screwed into the pull bolt, and the pull nut is disposed on the opposite side of the back stay through hole protective plate. And
There is a hole (hereinafter referred to as “backstay screw hole”) with a female screw formed on the surface of the backstay that faces the protective plate, and a push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. Coke oven protective plate mounting adjustment structure characterized by the above. The surface of the coke oven protection plate facing the back stay has a hole in which an internal thread is formed (hereinafter referred to as “protection plate screw hole”), the surface of the back stay facing the protection plate has a through hole, It has a pulling bolt that penetrates through the through hole and is screwed to a halfway depth of the protective plate screw hole,
There is a hole (hereinafter referred to as “backstay screw hole”) with a female screw formed on the surface of the backstay that faces the protective plate, and a push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. Coke oven protective plate mounting adjustment structure characterized by the above.   The attachment of the coke oven protection plate according to claim 3 or 4, wherein the protection plate screw hole, the through hole of the back stay, and the back stay screw hole are provided at a plurality of positions in the height direction of the protection plate. Adjustment structure.   The coke oven protection plate is provided with a hole in which a female screw is formed (hereinafter referred to as “protection plate screw hole”) on the surface facing the back stay, and the through hole is provided on the surface of the back stay facing the protection plate. Are screwed into the protective plate screw holes, and two nuts are screwed to the bolts, and the two nuts are arranged on both sides of the through hole of the backstay, and the bolts A coke oven protection plate attachment adjustment method, wherein the attachment position of the protection plate is adjusted by adjusting the positions of two nuts.   The method for attaching and adjusting a coke oven protection plate according to claim 6, wherein the protection plate screw hole and the through hole of the backstay are provided at a plurality of positions in the height direction of the protection plate. The coke oven protection plate is provided with a hole in which a female screw is formed (hereinafter referred to as “protection plate screw hole”) on the surface facing the back stay, and the through hole is provided on the surface of the back stay facing the protection plate. Through which the pulling bolt is screwed into the protective plate screw hole, the pulling nut is screwed into the pulling bolt, and the pulling nut is disposed on the side opposite to the protective plate of the through hole of the backstay,
A hole with a female thread is formed on the surface facing the protective plate of the backstay (hereinafter referred to as “backstay screw hole”). A push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. A coke oven protection plate attachment adjustment method, wherein the attachment position of the protection plate is adjusted by adjusting a pull nut position and a screw bolt insertion position. The coke oven protection plate is provided with a hole in which a female screw is formed (hereinafter referred to as “protection plate screw hole”) on the surface facing the back stay, and the through hole is provided on the surface of the back stay facing the protection plate. And screw the pulling bolt to the halfway depth of the protective plate screw hole,
A hole with a female thread is formed on the surface facing the protective plate of the backstay (hereinafter referred to as “backstay screw hole”). A push bolt is screwed into the backstay screw hole from the opposite side of the protective plate. A coke oven protection plate attachment adjustment method, wherein the attachment position of the protection plate is adjusted by adjusting the screwing position and the screwing position of the push bolt.   The attachment of the coke oven protection plate according to claim 8 or 9, wherein the protection plate screw hole, the through hole of the back stay, and the back stay screw hole are provided at a plurality of positions in the height direction of the protection plate. Adjustment method.

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