JP5854000B2 - How to update the coal carriage rail cradle - Google Patents

Description

  The present invention relates to a charcoal rail cradle that is installed on a ceiling portion of a coke oven and supports a charcoal rail, and a method for updating the same.

  On the ceiling of the coke oven, there is a rail for a coal car that travels in a horizontal direction orthogonal to the furnace length direction (a charcoal car rail) and a coal car rail cradle that supports the car rail (hereinafter simply referred to as a “rail cradle”). Also called).

  FIG. 10 shows a conventional rail cradle. As shown in FIG. 10, a rail (a charcoal rail) 13 for running a charcoal vehicle (not shown) is laid on the ceiling portion 2 of the coke oven 1, and the rail 13 is a rail receiving beam (a charcoal vehicle). (Rail support beam) 12 and further supported by a rail support (charcoal vehicle rail support) 11 embedded in the ceiling 2.

  In FIG. 11, the effect | action of the charcoal vehicle load W to the conventional rail stand 11 is shown. The ceiling portion 2 below the rail pedestal 11 is damaged by the action of the loaded vehicle load W due to repeated running of the loaded vehicle with a total weight of 200 to 300 tons, that is, the bricks and joints of the ceiling portion 2 are damaged and deformed, The rail cradle 11 sinks, and the furnace wall 4 under the ceiling 2 is overhanged. And if it progresses, it will eventually lead to collapse of the ceiling part 2 and collapse of the furnace wall part 4.

  In such cases, repairs have been made by transposing damaged bricks on the ceiling or pouring indefinite refractories, but repairing the ceiling while continuing operation is extremely difficult and expensive. It was difficult, and we couldn't repair enough.

  On the other hand, in patent document 1, the joint of a rail and the joint of a rail receiving beam is welded, respectively, and it is set as one seamless rail and a rail receiving beam, and these are supported by a rail cradle. A method has been disclosed for eliminating the impact and partial overload when running a charcoal vehicle caused by a seam.

Utility Model Registration No. 2570693

  However, in the case of the method described in Patent Document 1, there is already a single piece without a joint in a state where the bricks and joints on the ceiling below the rail cradle are damaged and deformed, and the rail cradle is sinking. It is difficult to install a rail and a rail receiving beam. After all, it is necessary to repair a ceiling brick or adjust the height of the rail receiving base, which is not realistic.

  Moreover, even if it uses the method of patent document 1, it does not change that a repeated load other than the impact force by a charcoal vehicle acts on a rail cradle, and damage to the ceiling part in which the charcoal vehicle rail cradle is installed. It does not lead to a drastic improvement against the occurrence of (damage / deformation of bricks and joints on the ceiling).

  The present invention has been made in view of the circumstances as described above, and in the coke oven, the ceiling portion on which the coal-bearing vehicle rail cradle is installed is damaged (damage or deformation of the bricks or joints in the ceiling portion). However, it is an object of the present invention to provide a coaled vehicle rail cradle that can accurately suppress the progress of the damage and a method for updating the same.

  In order to solve the above problems, the present invention has the following features.

  [1] A charcoal car rail cradle installed by updating an existing charcoal car rail cradle in a damaged section of a ceiling portion of a coke oven, wherein the length in the furnace length direction of the charcoal car rail cradle is A coal-car rail pedestal that has been updated to be longer than the length of the damaged section in the furnace length direction.

  [2] The charcoal rail of the above-described [1], wherein the length in the furnace length direction is increased by joining steel members or castings to both ends of the existing charcoal rail rail pedestal in the furnace length direction. Cradle.

  [3] The apparatus according to [1], wherein the length in the furnace length direction is lengthened by removing the existing charred car rail cradle and re-installing it on a newly produced charcoal car rail cradle. Charcoal rail cradle.

  [4] A method of renewing a coal-car rail pedestal installed in a damaged section of a ceiling portion of a coke oven, wherein a length in a furnace length direction of the charcoal-car rail cradle is a length in a furnace length direction of the damaged section A method for updating a coal-car rail cradle that is updated so as to be longer than the length.

  [5] The charcoal vehicle rail according to [4], wherein the length in the furnace length direction is increased by joining steel members or castings to both ends of the existing charcoal vehicle rail pedestal in the furnace length direction. How to update the cradle.

  [6] The apparatus according to [4], wherein the length in the furnace length direction is lengthened by removing the existing charred car rail cradle and re-installing it on a newly produced charcoal car rail cradle. How to update the charcoal rail cradle.

  In the present invention, even when the ceiling portion on which the charcoal vehicle rail cradle is installed is damaged (damage / deformation of bricks and joints on the ceiling portion), the progress of the damage can be accurately suppressed.

It is a figure which shows Embodiment 1 of this invention. It is a figure which shows the relationship between the furnace length direction length of the charcoal vehicle rail support in Embodiment 1 of this invention, and the furnace length direction length of the damage area of a ceiling part. It is a figure which shows Embodiment 2 of this invention. It is a figure which shows Embodiment 3 of this invention. It is a figure which shows Embodiment 4 of this invention. It is a figure which shows Embodiment 5 of this invention. It is a figure for demonstrating the effect in this invention. It is a figure which shows the analysis model in the Example of this invention. It is a figure which shows the analysis result in the Example of this invention. It is a figure which shows the conventional charcoal-car track receiving stand. It is a figure which shows the effect | action of the charcoal vehicle load in the conventional charcoal vehicle rail stand.

  In the present invention, when the ceiling portion where the coal-car rail gauge cradle is installed is damaged (damaged or deformed ceiling bricks or joints), the damaged section (the region where the ceiling bricks or joints are damaged / deformed) ) To install an updated coal-car rail cradle, in which case the length of the renewed coal-car rail cradle in the furnace length direction is longer than the length of the damaged section in the furnace length direction. Yes. Thereby, the load of the charcoal vehicle can be dispersed in the furnace length direction, the stress and deformation of the ceiling part and the furnace wall part can be relaxed, and the progress of damage can be suppressed accurately.

  Embodiments (Embodiments 1 to 5) of the present invention will be described below.

[Embodiment 1]
1A and 1B are diagrams showing Embodiment 1 of the present invention, in which FIG. 1A is a top view and FIG. 1B is a longitudinal sectional view.

  As shown in FIG. 1, in this Embodiment 1, the steel plate 22 is joined by welding (welding part 23) to the furnace length direction (horizontal direction orthogonal to the longitudinal direction of a rail) of the existing rail base 11 at both ends. As a result, the updated rail receiving base 21 is obtained. At that time, as shown in FIG. 2, the length L in the furnace length direction of the updated rail cradle 21 is made longer than the length Ld in the furnace length direction of the damaged section of the ceiling 2 (L > Ld). The plate thickness of the steel plate 22 is preferably 50 mm to 100 mm based on the analysis results described later.

  When steel plates 22 are joined and integrated at both ends of the existing rail cradle 11 in the furnace length direction, parts that interfere with existing equipment such as the flue inspection hole 3 are dealt with by punching or notching. To do. In order to adjust the installation position of the rail cradle 21 to a predetermined position and perform uniform load transmission to the ceiling portion 2, the lower surface portion and the side surface portion of the rail cradle 21 are filled with grout 24. Moreover, since it is desirable that there is no protrusion on the upper surface of the ceiling part 2, most of the rail receiving base 21 is preferably embedded in the ceiling part 2.

[Embodiment 2]
FIG. 3 is a diagram showing Embodiment 2 of the present invention.

  As shown in FIG. 3, the second embodiment is basically the same as the first embodiment, and by joining and integrating the steel plates 22 at both ends of the existing rail cradle 11 in the furnace length direction, The updated rail receiving base 21 is used.

  However, in this Embodiment 2, it replaces with the welding in Embodiment 1, and is integrated by the bolt joining 28 using the splicing plate 26 and the shape steel 27. FIG.

[Embodiment 3]
FIG. 4 is a diagram showing Embodiment 3 of the present invention.

  As shown in FIG. 4, the third embodiment is basically the same as the second embodiment, and the steel members 32 are integrated by bolt joints 33 at both ends of the existing rail cradle 11 in the furnace length direction. Thus, the updated rail receiving base 31 is provided.

  However, in this Embodiment 3, it replaces with the steel plate (steel member) 22 in Embodiment 2, and as a steel member 32, shaped steel, such as H-section steel reinforced with a vertical rib, etc., welding members, such as built-up H-section steel Is used. In addition, as the steel member (H-shaped steel) 32, it is preferable to use a member having a cross-sectional performance equal to or higher than that of a steel plate having a thickness of 50 mm to 100 mm.

  When the steel member 32 is joined and integrated at both ends of the existing rail cradle 11 in the furnace length direction, portions that interfere with the existing equipment such as the flue inspection hole 3 may be cut or notched. deal with. In order to adjust the installation position of the rail cradle 31 to a predetermined position and perform uniform load transmission to the ceiling portion 2, the lower surface portion and the side surface portion of the rail cradle 31 are filled with grout 24. Moreover, since it is desirable that there is no protrusion on the upper surface of the ceiling part 2, most of the rail receiving base 31 is preferably embedded in the ceiling part 2.

  Here, the steel member 32 is integrated by the bolt joint 33, but may be integrated by welding. A casting may be used instead of the steel member 32.

[Embodiment 4]
FIG. 5 is a diagram showing Embodiment 4 of the present invention.

  As shown in FIG. 5, in the fourth embodiment, the existing charcoal vehicle rail cradle 11 is removed and updated to a newly manufactured rail cradle 41. At that time, as shown in FIG. 2, the length L of the updated rail cradle 41 in the furnace length direction is set to be longer than the length Ld of the damaged section of the ceiling portion 2 ( L> Ld). In addition, as for the member used for the rail receiving stand 41, it is good to use what has a cross-sectional performance comparable as or more than a 50 mm-100 mm steel plate.

  When a newly manufactured rail receiver 41 is installed, a portion that interferes with existing equipment such as the flue inspection hole 3 is dealt with by a cutout or a notch. In order to adjust the installation position of the rail cradle 41 to a predetermined position and perform uniform load transmission to the ceiling portion 2, the lower surface portion and the side surface portion of the rail cradle 31 are filled with grout 24. Moreover, since it is desirable that there is no protrusion on the upper surface of the ceiling portion 2, most of the rail receiving base 41 is preferably embedded in the ceiling portion 2.

[Embodiment 5]
In this Embodiment 5, it replaces with the existing rail receptacle 11, and the procedure at the time of installing the rail receptacles 21, 31, and 41 shown in said Embodiment 1-4 is demonstrated using FIG.

  First, the case where the rail stands 21 and 31 are installed will be described.

  (S1) After the rail receiving beam 12 is supported by the temporary receiving jig 51, the existing rail receiving base 11 is taken out.

  (S2) Next, the steel rails (steel plate 22, H-shaped steel 31 and the like) 31 are joined and integrated to both ends of the taken-out existing rail base 11 to thereby update the rail bases 21 and 31 updated. obtain.

  (S3) Next, excavation, repair, and correction of the installation position are performed, the grout 24 is filled, and the updated rail receivers 21 and 31 are installed at predetermined installation positions.

  (S4) Finally, after curing the grout 24, the provisional jig 51 is removed and the process is completed.

  Next, the case where the rail receiving base 41 is installed will be described.

  (P1) After the rail receiving beam 12 is supported by the temporary receiving jig 51, the existing rail receiving base 11 is removed.

  (P2) Next, the rail receiving base 41 is newly manufactured. Note that (P1) and (P2) may be reversed.

  (P3) Next, excavation, repair, and correction of the installation position are performed, the grout 24 is filled, and the newly manufactured rail receiver 41 is installed at a predetermined installation position.

  (P4) Finally, after curing the grout 24, the provisional jig 51 is removed and the process is completed.

  Here, first, in the present invention, a mechanism for dispersing the coal loaded vehicle load W in the furnace length direction and relieving stress and deformation of the ceiling part 2 and the furnace wall part 4 will be described with reference to FIG. In addition, in FIG. 7, although the rail stand 21 in said Embodiment 1 is installed, it is the same also in the other rail bases 31 and 41. FIG.

  As shown in FIG. 7, in the rail cradle 21, the pressure of the rail cradle receiving the loaded coal load W is obtained by joining and integrating the steel plates 22 to both ends of the existing rail cradle 11 in the furnace length direction. The area can be increased. Thereby, the stress which acts on the lower part of the rail receiving base 21 can be disperse | distributed to a furnace length direction, and the stress and deformation amount of the ceiling part 2 and the furnace wall part 4 can be made small.

  In general, damage due to repeated loads has a high correlation with the applied stress and the amount of deformation, and by reducing the applied stress and the amount of deformation, the progress of the damage can be suppressed or the progress speed can be reduced.

  It should be noted that the longitudinal direction of the rail may have already been greatly damaged due to repeated loading of the charcoal vehicle, and it is not preferable to extend the rail base. It is preferable to extend the rail cradle in the furnace length direction, which is the direction away from the rail position, and to distribute the stress to the healthy part.

  From the above, the rail cradle extended in the furnace length direction can reduce the stress and deformation amount of the ceiling part 2 and the furnace wall part 4, and the ceiling part 2 and the furnace wall part 4 have already been damaged. However, the progress of the damage can be suppressed or the progress speed can be reduced.

  Next, in order to confirm the effects and preferred conditions of the present invention, the following analysis was performed. An analysis model is shown in FIG. A part of the coke oven was taken out, and the ceiling part 2, the furnace wall part 4, the rail cradle 21 and the rail cradle 29 were modeled with solid elements, and FEM analysis was performed.

  Here, when the length of the rail cradle is L and the length of the damaged section is Ld, as shown in FIG. 8 (a), case 1: the rail cradle 21 where L> Ld, As shown in FIG. 8B, the thickness of the steel plate 22 (0 to 250 mm: where 0 is no steel plate) was used as a parameter for the case 2 of the rail cradle 29 where L <Ld. Analysis was performed, and the amount of overhang of the furnace wall portion 4 due to the loading of the load W on the rail cradle 21 and the rail cradle 29 was compared.

In addition, about the healthy part of the ceiling part 2, and the furnace wall part 4, it was set as Young's modulus 7300N / mm < ² > and Poisson's ratio 0.2. About the damaged part (damaged section) of the ceiling part 2, the Young's modulus was reduced to 1/500 of the healthy part. For the rail supports 21 and 29, the Young's modulus was 207000 N / mm ² and the Poisson's ratio was 0.29.

  FIG. 9 shows the relationship between the overhang amount reduction coefficient and the plate thickness of the steel plate 22. Here, the overhang amount reduction coefficient is the rail of the case 1 when the overhang amount of the furnace wall portion 4 in the case where there is no steel plate 22 (steel plate thickness = 0), which is a conventional rail base, is 1.0. The ratio of the overhang amount of each furnace wall part 4 in the cradle 21 and the rail cradle 29 of the case 2 is shown.

  As shown in FIG. 9, in case 2: L <Ld, even if the steel plate thickness is increased, the overhang amount reduction coefficient (reduction effect) reaches a peak at 0.83 (17% reduction), The effect is limited. Therefore, it is understood that the length L in the furnace length direction of the rail pedestal should be larger than the length Ld of the damaged section of the ceiling (L> Ld).

  Case 1: When L> Ld, the steel sheet thickness is 50 mm, the overhang reduction factor is 0.64, the steel sheet thickness is 100 mm, the overhang reduction coefficient is 0.32, and the steel sheet thickness is 50 mm- About 100 mm, the overhang amount of the furnace wall 4 can be reduced to about 2/3 to 1/3 of the conventional one. However, it can be seen that when the steel plate thickness exceeds 100 mm, the reduction effect tends to peak. Therefore, the thickness of the steel plate 22 is preferably 50 mm to 100 mm.

DESCRIPTION OF SYMBOLS 1 Coke oven 2 Ceiling part 3 Flue inspection hole 4 Furnace wall part 11 Rail cradle (coal-car rail cradle)
12 Rail receiving beam (Coaled car rail receiving beam)
13 rail (coal-car rail)
21 Rail cradle (Coaled car rail cradle)
22 Steel plate 23 Welded part 24 Grout 26 Joint plate 27 Shape steel 28 Bolt joint 29 Rail cradle (coal vehicle rail cradle)
31 Rail cradle (Coaled car rail cradle)
32 Steel members 33 Bolt joints 41 Rail cradle (coal vehicle rail cradle)
51 Temporary receiving jig

Claims (3)

  A method of renewing a coal-carrying rail rail pedestal installed in a damaged section of a ceiling portion of a coke oven, wherein a length in a furnace length direction of the coal-carrying vehicle rail pedestal is longer than a length in a furnace length direction of the damaged section A method for updating a coal-car rail cradle, characterized by being updated so as to be. The renewal of a charcoal-car rail cradle according to claim 1 , wherein the length in the furnace-length direction is increased by joining steel members or castings to both ends of the existing charcoal-car rail cradle in the furnace length direction. Method. The length of the furnace-coiled vehicle rail pedestal according to claim 1 , wherein the length of the furnace-coiled vehicle rail pedestal is increased by removing the existing coal-coated vehicle rail pedestal and re-installing it on a newly manufactured coaled vehicle rail pedestal. Update method.