Guide jig

Abstract

To easily install a precast block so as not to be shifted in the direction of an oven battery.SOLUTION: A guide jig according to the present invention includes: two guide plates capable of sandwiching a precast block for a coke oven; and a connecting body that connects the two guide plates facing each other, wherein the two guide plates each have a curved portion whose end portion expands outward.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a guide jig for installing precast blocks in a coke oven without misalignment. [Background technology]

[0002] In this application, the horizontal direction is referred to as the oven length direction (FD), and the horizontal direction perpendicular to the oven length direction (FD) is referred to as the oven battery direction (SD). The precast block PB is referred to as the oven length direction (FD) and oven battery direction (SD) depending on the direction in which it is installed in the coke oven. In the drawings, the oven length direction (FD) is indicated by a double-headed arrow with FD, and the oven battery direction (SD) is indicated by a double-headed arrow with SD. Furthermore, the top and bottom directions of the guide jig are described when it is attached to the precast block PB, and the side where the precast block PB is located is referred to as the inside.

[0003] Fig. 1 is a cross-sectional view of a coke oven 1 as seen from the pusher side. As shown in Fig. 1, in the coke oven 1, a large number of firebricks 12 are stacked on a corbel 16 provided above a regenerator chamber 11 to construct a plurality of combustion chambers 13, thereby forming a plurality of combustion chambers 13 and a plurality of coking chambers 14. In Fig. 1, a flue (not shown) is formed inside the combustion chamber 13, and a coking chamber 14 is formed between two combustion chambers 13. The coke oven 1 in Fig. 1 is provided with a plurality of combustion chambers 13, coking chambers 14, etc. (not shown) on both sides in the furnace battery direction SD.

[0004] The coke oven 1 is used under harsh conditions of high temperature, and continued use causes deterioration over time. If a hole develops in the combustion chamber 13 due to deterioration over time, it can be repaired by forming a thermal spray layer on the surface of the combustion chamber 13, as described in Patent Document 1. However, deterioration over time can cause cracks due to thermal shock in the refractory bricks 12 of the combustion chamber 13, which can cause overhangs toward the coke chamber 14. When such deterioration occurs, the overhangs become an obstacle when pushing out the coke carbonized in the coke chamber 14, making it difficult to push out the coke.

[0005] In a coke oven 1, when refractory bricks 12 protrude into a combustion chamber 13 due to deterioration over time, the refractory bricks 12 must be demolished and repaired. In this case, as disclosed in Patent Documents 2 and 3, one of the multiple combustion chambers 13 that has deteriorated and become misaligned is dismantled, and a new combustion chamber 13 is constructed. In FIG. 1, the three combustion chambers 13 in the re-installation range TR indicated by diagonal lines and the furnace ceiling 15 above them are dismantled and reconstructed.

[0006] A new combustion chamber 13 can be reconstructed by installing a large number of precast blocks PB larger than the refractory bricks 12 (see Patent Document 3). FIG. 2 shows a perspective view of the combustion chamber 13 constructed in the transfer area TR. The combustion chamber 13 is reconstructed using multiple precast blocks PB along the furnace length direction FD indicated by the double arrow. In the embodiment shown in FIG. 2, three combustion chambers 13 are constructed in the transfer area TR in the furnace battery direction SD. A coking chamber 14 is formed between adjacent combustion chambers 13. The combustion chambers 13 and the coking chambers 14 are formed alternately in the furnace battery direction SD. The precast blocks PB have the width of the combustion chamber 13 in the furnace battery direction SD, and the combustion chamber 13 is formed by stacking multiple precast blocks PB. A space for a flue is provided inside each precast block PB. A flue is formed in the internal space of the combustion chamber 13, which is formed by stacking the precast blocks PB. A furnace ceiling 15 is installed above the combustion chambers 13 and the coking chambers 14. The furnace ceiling 15 in FIG. 2 is in a state before casters are laid on the upper side to make it flat.

[0007] Figure 3 shows the installation of multiple precast blocks PB in the transfer area TR. Similar to Figure 1, Figure 3 is a cross-sectional view of the coke oven 1 perpendicular to the furnace length direction FD as seen from the pusher side. Figure 3 also shows the state in which a combustion chamber 13 is being created using precast blocks PB in the transfer area TR indicated by the dotted line. The precast block PB being hung for installation is referred to as precast block PB1, and the precast block PB that has already been installed is referred to as precast block PB2. When installing the precast block PB in the transfer area TR, as shown in Figure 3, precast block PB1 is hung from the top of the coke oven 1 and installed like precast block PB2.

[0008] To reconstruct the combustion chamber 13 and the coke chamber 14, a traveling crane 2 for transporting precast blocks PB and the like is provided above the coke oven 1 in FIG. 3. The traveling crane 2 is lifted above the furnace ceiling 15 by a crane vehicle or the like and placed on rails R for a coal loading car (not shown). The rails R extend in the furnace battery direction SD. The traveling crane 2 shown in FIG. 3 includes a crane frame 21, crane rails 22, movable rails 23, wheels 24, and a winch 25. Two crane rails 22 are attached to the top of the crane frame 21 so as to extend in the furnace length direction FD. In addition, a movable rail 23 extending in the furnace battery direction SD is provided so as to straddle the two crane rails 22. The traveling crane 2 is placed on the rails R by the wheels 24. The movable rails 23 extending in the furnace battery direction SD can move along the crane rails 22 in the furnace length direction FD. The winch 25, which is movably attached to the moving rail 23, can move in the furnace battery direction SD and the furnace length direction FD relative to the crane frame 21. The winch 25 can wind up the wire 3, and below the wire 3, a precast block PB1 is clamped by a gripping device 4, and the precast block PB1 is gripped by the gripping device 4 at its side CS1. Wheels 24 are provided below the crane frame 21, and the traveling crane 2 can move in the furnace battery direction SD on the rail R. The rail R is provided above the furnace ceiling 15, but is suspended in the air above the transfer range TR.

[0009] In Figure 3, precast block PB2 is installed on top of corbel 16 located below the transfer area TR. Another precast block PB1 is suspended above the installed precast block PB2 from a traveling crane 2. As described above, a rail R on which a coal loading car (not shown) runs is provided above the coke oven 1, and the traveling crane 2 is installed on the rail R to suspend precast block PB1 from above, thereby constructing the combustion chamber 13. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent Publication No. 2021-130783 [Patent Document 2] International Publication No. 2012 / 078036 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-137447 Summary of the Invention [Problem to be solved by the invention]

[0011] Because precast block PB is large and heavy, it cannot be manually placed in place like firebrick 12; instead, it is suspended from a crane such as a traveling crane 2. Due to the weight of precast block PB and the limited working space, it is difficult to accurately place precast block PB2 on corbel 16 or on or beside another precast block PB1, as shown in Figure 3. If precast block PB1 is misaligned in the furnace battery direction SD when suspended and placed, as shown in Figure 3, unevenness will occur on both sides of the coke chamber 14. This will cause the unevenness to become an obstacle when pushing out the coke carbonized in the coke chamber 14, making it difficult to push out the coke.

[0012] The present invention aims to make it possible to easily install precast block PB1 without shifting in the furnace battery direction SD. [Means for solving the problem]

[0013] The guide jig of the present invention comprises two guide plates capable of clamping precast blocks for coke ovens, and a connector that connects the two opposing guide plates, and the two guide plates have curved portions whose ends extend outward. [Effects of the Invention]

[0014] The present invention allows for easy positioning and installation of precast blocks in a coke oven. [Brief explanation of the drawings]

[0015] [Figure 1] Cross section of a coke oven seen from the pusher side. [Figure 2] FIG. 1 is a perspective view of a combustion chamber and other components formed from precast blocks. [Figure 3] Cross section of a coke oven showing precast blocks hanging in the transfer area. [Figure 4] FIG. 1 is a cross-sectional view of a coke oven showing a state in which a precast block is being moved in an embodiment of the present invention. [Figure 5] FIG. 2 is a top view of the guide jig of the first embodiment. [Figure 6] FIG. 3 is a bottom view of the guide jig of the first embodiment. [Figure 7] FIG. 1 is a perspective view of the guide jig of Example 1 installed on a precast block. [Figure 8] A side view of a precast block being installed using the guide jig of Example 1. [Figure 9] A side view of a precast block being installed using the guide jig of Example 2. DETAILED DESCRIPTION OF THE INVENTION

[0016] Figure 4 is a cross-sectional view of a coke oven 1 showing a state in which a precast block PB1 is being moved in an embodiment of the present invention. The cross-sectional view is perpendicular to the oven battery direction SD. In Figure 4, the horizontal direction is the oven length direction FD, and the depth direction is the oven battery direction SD. The cross-sectional view seen from the direction of arrow S in Figure 4 is Figure 3, and the cross-sectional view seen from the direction of arrow F in Figure 3 is Figure 4.

[0017] 3 and 4, as the winch 25 moves using the crane rail 22 or the moving rail 23, the precast block PB1 for the coke oven suspended from the winch 25 moves in the oven battery direction SD or the oven length direction FD. Then, by extending the wire 3 with the winch 25, the precast block PB1 moves downward. In this way, the precast block PB1 is placed at the installation position by controlling its three-dimensional position.

[0018] In Figure 4, wire 3 is loosened with winch 25 and winch 25 is moved in the direction of arrow M. Then, precast block PB1 suspended by wire 3 is installed in the transfer area TR so that its connection side end SE1 contacts the connection side end SE2 of precast block PB2 for the installed coke oven. At this time, precast block PB1 must be installed so that it does not shift relative to precast block PB2 in the oven battery direction SD shown in Figure 3. [Example]

[0019] In Example 1, a guide jig 5 is installed at the position indicated by the dotted line in Figure 4 to prevent the precast block PB1 from shifting in the furnace battery direction SD. Figure 5 shows a top view of the guide jig 5 of Example 1, and Figure 6 shows a bottom view of the guide jig 5. In this application, the top and bottom of the guide jig 5 are shown in the direction when attached to the precast block PB. The guide jig 5 includes two opposing guide plates 51 that can sandwich the precast block PB2 and a connector 52 that connects the two guide plates 51. The two guide plates 51 have flat portions 511 and curved portions 512, and the flat portions 511 can sandwich the coke oven precast block PB2. The curved portions 512 of the two guide plates 51 are shaped so that the diagonally upper portions of the guide plates 51 expand outward. The two guide plates 51 are connected to the connector 52 above the flat portions 511. A weight 53 is provided on the outer side of the guide plate 51 opposite to the curved portion 512 in the furnace length direction FD.

[0020] The connector 52 has an outer plate 521 connected to one guide plate 51, an inner plate 522 connected to the other guide plate 51, bolts 523, and nuts 524. The connector 52 having these components serves as an adjustment mechanism for adjusting the distance between the two guide plates 51. As shown in Fig. 6, the outer plate 521 and the inner plate 522 are bent downward at right angles near the opposing sides to form bent portions 521a and 522a. The inner plate 522 is slidably housed below the outer plate 521.

[0021] The bolts 523 shown in Fig. 6 are inserted into holes (not shown) from the back side of the internal plate 522, and the heads of the bolts 523 are welded and fixed to the internal plate 522. As shown in Fig. 5, the external plate 521 has long adjustment slots 521b in the furnace battery direction SD. The two bolts 523 protruding upward from the internal plate 522 pass through the adjustment slots 521b of the external plate 521 and protrude above the external plate 521. Nuts 524 are attached to the protruding bolts 523, and the external plate 521 and the internal plate 522 are fixed together by tightening the nuts 524 from above the external plate 521.

[0022] The outer plate 521 and the guide plate 51 connected to the outer plate 521 form the first jig part 5A. The inner plate 522 to which the bolt 523 is fixed and the guide plate 51 connected to the inner plate 522 form the second jig part 5B. The first jig part 5A and the second jig part 5B are connected and fixed by tightening the nuts 524 attached to the bolts 523. The first jig part 5A, the second jig part 5B and the two nuts 524 form the guide jig 5. The first jig part 5A and the second jig part 5B can be carried separately, making it easier for the worker to work.

[0023] FIG. 7 shows a perspective view of a precast block PB2 to which the guide jig 5 of Example 1 is attached. The first jig part 5A has an outer plate 521 fixed to the flat portion 511 above the guide plate 51, and the second jig part 5B has an inner plate 522 fixed to the flat portion 511 above the guide plate 51. The guide jig 5 is used by placing the connector 52 on the installed precast block PB2. When attaching the guide jig 5 to the precast block PB2, the inner plate 522 of the second jig part 5B is placed on the precast block PB2, and then the outer plate 521 of the first jig part 5A is placed on top of that. When placing the outer plate 521 on the inner plate 522, the two bolts 523 pass through the elongated adjustment holes 521b. Then, nuts 524 are attached to the bolts 523, and the gap between the two opposing guide plates 51 is narrowed to the width of the precast block PB2 in the furnace bed direction SD. Then, nuts 524 are tightened onto the bolts 523 to fix the first jig part 5A and the second jig part 5B, and the guide jig 5 can be attached to the precast block PB2.

[0024] The inside of the flat portions 511 of the two guide plates 51 of the attached guide jig 5 contacts the two side surfaces CS2 of the precast block PB2. The side surfaces CS2 are the surfaces that face the coking chamber 14 when the precast block PB2 forms the combustion chamber 13. The curved portions 512 of the two guide plates 51 have their ends in the furnace length direction FD positioned outside the surface of the side surface CS2 near the connecting end SE2 of the precast block PB2, and open obliquely upward. The guide jig 5 is fixed in contact with the precast block PB2 by the underside of the connector 52 and the inner surfaces of the flat portions 511 of the two guide plates 51. In this manner, the guide jig 5 is attached to the precast block PB2.

[0025] Figure 8 is a side view showing the installation of precast block PB1 using guide jig 5. Guide jig 5 is attached to precast block PB2, which is installed on corbel 16. Guide plate 51 has a flat portion 511 and a curved portion 512, indicated by diagonal lines. The boundary between flat portion 511 and curved portion 512 is inclined with respect to the furnace length direction FD and a direction perpendicular to the furnace length direction. Curved portion 512 is located diagonally above the boundary and opens outward diagonally upward (diagonally upward left in Figure 8). Guide jig 5 has a weight 53 near the end of guide plate 51, making it difficult for the curved portion 512 side to sag under its own weight.

[0026] Figure 8 is an enlarged partial view of the lower part of Figure 4, showing the suspended precast block PB1 being lowered diagonally from above to be installed so that it is in contact with precast block PB2 in the furnace length direction FD. The gripping device 4 is not shown. After the state shown in Figures 4 and 8, when precast block PB1 is installed next to precast block PB2, the connection side end SE1 of precast block PB1 and the connection side end SE2 of precast block PB2 come into contact.

[0027] Precast block PB2 has the shape shown in Figure 7, with the connection side end SE2 protruding slightly in the furnace length direction FD. Precast block PB1 also has the same shape as precast block PB2 shown in Figure 7. The connection side end SE1 of precast block PB1, which corresponds to the end opposite the connection side end SE2 in Figure 7 in the furnace length direction FD, is recessed in the center. Therefore, the connection side end SE1 and connection side end SE2 are connected so that the protruding portion of precast block PB2 fits into the recess of precast block PB1.

[0028] As shown in Figure 8, a portion of the lower part of the flat portion 511 of the guide plate 51 protrudes from the connection-side end SE2 of the precast block PB2 in the furnace length direction FD. The inside of the flat portion 511 contacts the side surface CS2 of the precast block PB2 shown in Figure 3 and is flush with the side surface CS2. The curved portion 512 is diagonally above the guide plate 51 and opens outward from the surface of the side surface CS2. In Figure 8, the curved portion 512 opens toward the suspended precast block PB1. Because the curved portion 512 opens in the furnace bed direction SD and is wider than the width of the precast block PB1, the suspended precast block PB1 easily fits inside the two guide plates 51. As the precast block PB1 approaches the connection-side end SE2, the connection-side end SE1 of the precast block PB1 is guided by the curved portion 512. It then fits between the flat portion 511 protruding from the connection-side end SE2 of the precast block PB2. Then, using the connection end SE1 connected to precast block PB2 as a reference, the side CS1 of precast block PB1 is adjusted so that it is flush with the side CS2 of precast block PB2, and precast block PB1 is installed. In this way, precast block PB1 is installed so that its side CS1 is flush with the side CS2 of precast block PB2.

[0029] Once the precast block PB1 has been placed, the nuts 524 of the guide jig 5 are loosened and the guide jig 5 is removed. Then, in order to place the next precast block PB1, the guide jig 5 is attached onto another precast block PB2.

[0030] In the guide jig 5 of Example 1, the nut 524 is tightened directly on the elongated adjustment hole 521b. However, it is also possible to place a plate with a hole for the bolt 523 on the elongated adjustment hole 521b, and then attach and tighten the nut 524 to the bolt 523 from above. [Example]

[0031] The guide jig 6 of Example 2 differs from the guide jig 5 of Example 1 in the shape of the guide plate 51. Figure 9 is a side view of the situation in which precast block PB1 is being installed using the guide jig 6 of Example 2. As with Figure 8 of Example 1, the suspended precast block PB1 is about to be installed next to precast block PB2.

[0032] The guide jig 6 of Example 2 has two guide plates 61 that can sandwich a precast block PB2 and are connected by a connector 62 (not shown). The structure of the connector 62 is the same as that of the connector 52 of Example 1, and an outer plate 621 (not shown) and an inner plate 622 (not shown) are fixed to the flat portion 611 of the guide plate 61. The connector 62 also has an adjustment mechanism for adjusting the distance between the two guide plates 61. On the other hand, the two guide plates 61 of Example 2 have the ends of the curved portions 612 in the furnace length direction FD that open toward the furnace bed direction SD. Furthermore, the flat portion 611 is installed so that a portion of the curved portion 612 side in the furnace length direction FD protrudes outward beyond the connection side end SE2. In the guide plate 61 of Example 2, the boundary between the flat portion 611 and the curved portion 612 is perpendicular to the furnace length direction FD. In the furnace length direction FD, the flat portion 611 is located on one side of the boundary, and the curved portion 612 is located on the other side of the boundary. The curved portion 612 opens outward in the furnace length direction FD (leftward in FIG. 9) and opens in the furnace battery direction SD.

[0033] When installing precast block PB1 using guide jig 6, as shown in Figure 9, precast block PB1 is lowered until the lower end of precast block PB1 is positioned to the side of guide plate 61. Then, precast block PB1 is brought closer to precast block PB2. As a result, connection side end portion SE1 of precast block PB1 is guided by curved portion 612 of guide plate 61 and enters between flat portion 611 protruding from connection side end portion SE2 of precast block PB2. Thereafter, as in Example 1, precast block PB1 is installed so that side surface CS1 is flush with side surface CS2 of precast block PB2.

[0034] The guide jigs 5 and 6 in Examples 1 and 2 were attached to the installed precast block PB2, but may also be attached to the suspended precast block PB1.

[0035] Furthermore, the specific configuration is not limited to the examples, and the present invention includes design changes within the scope of the present invention. Furthermore, the above-described examples can be combined by utilizing each other's technologies as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0036] 1. Coke oven 11 Heat storage chamber 12 Firebrick 13 Combustion chamber 14 Carbonization chamber 15 Furnace roof 16 Corbel 2 Traveling Crane 21 Crane frame 22 Crane Rail 23 Moving Rail 24 wheels 25 Winch 3 wire 4 Gripping device 5 Guide jig 5A First jig part 5B Second jig part 51 Guide plate 511 Plane section 512 curved section 52 Connectors 521 External Panel 521a Bending part 521b Adjustment slot 522 Internal plate 522a Bending part 523 volts 524 Nut 53 Weight 6 Guide jig 61 Guide plate 611 Plane section 612 Curved section 62 Connectors 621 External Panel 622 Internal plate PB Precast Block PB1 Precast Block PB2 Precast Block CS1 side CS2 side SE1 connection end SE2 connection end TR Transshipment Range R rail FD furnace length direction SD Furnace Batteries Direction

Claims

1. Two guide plates that can hold precast blocks for coke ovens, a connector that connects the two opposing guide plates, The two guide plates have curved portions at their ends that flare outward. Guide jig.

2. 2. The guide jig according to claim 1, wherein the connector is placed on a precast block for a coke oven.

3. 3. The guide jig according to claim 1, wherein the connecting member has an adjustment mechanism for adjusting the gap between the two guide plates.

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