JP3570184B2 - Widening device for pallet truck in sintering machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pallet truck widening device in a sintering machine used for producing sinter.
[0002]
[Prior art]
In the sinter production process to be charged into the blast furnace, a Rurugi type downward suction type sintering machine is often used. As shown in FIG. 6, the Lurgi type downward suction type sintering machine continuously supplies a sintering raw material 1 from a raw material hopper 2 to a pallet truck 7 via a drum feeder 3 and a sloping plate 5, and a driving sprocket. The sintering material layer 8 on the pallet truck 7 is moved at a low speed in the direction of the arrow by rotating the pallet truck 7. At the same time, a large number of wind boxes 9 arranged below the pallet truck 7 are suctioned by a suction exhaust fan 12 via an exhaust gas duct 10 and an exhaust gas dust collector 11, and the sintering raw material layer 8 on the pallet truck 7 is ignited by an ignition furnace 6. Ignite the surface. With the sintering raw material layer 8 ignited on the surface, the sintering reaction is shifted downward by air passing downward from the surface with the movement of the pallet truck 7, and the sintering reaction is performed over the entire layer while reaching the mining part. And continuously producing sintered ore.
[0003]
As shown in FIG. 7, a great bar 16 is detachably supported on a pallet body beam 13 constituting the pallet truck 7, and a side wall 17 is detachably supported on a pallet side wall 14. As shown in FIG. 8, abrasion-resistant and heat-insulating insulation is provided on the beam head 18 of the pallet body beam 13 disposed between the pallet side walls 14 disposed on both sides in the width direction of the pallet truck 7. Ration cover 19. As shown in FIG. 9, a number of great bars 16 are sequentially set between the pallet body beams 13 before and after the insulation cover 19 is covered, and a slit-like gap formed between the great bars 16 is formed. Is a ventilation path. Wheels 20 are provided on the pallet side walls 14 on both sides, and the pallet truck 7 travels on the track 15 via the wheels 20. In order to seal the pallet side wall 14 and the fixedly disposed wind box 9, a seal bar 21 is incorporated at a lower portion of the pallet side wall 14, and slides with a fixed-side wear bar 22 provided at an upper end of the wind box 9. The movement prevents the leakage.
[0004]
In the sintering by the downward suction type sintering machine, the wind speed increases at both ends near the sidewall 17 from the center of the sintering raw material layer 8 due to the wall effect, and excessive air flows. The reason why the wind speed in the vicinity of the side wall 17 is increased is that the porosity between the raw material particles and the side wall surface is larger than that in the case where the raw material particles are filled. As the sintering of the sintering raw material layer 8 progresses, the sintering raw material shrinks due to shrinkage, so that a gap is generated in the side wall portion, which promotes excessive air flow. For this reason, in the vicinity of the side wall 17 of the pallet truck 7, the sintering time is shortened by excess air as compared with the central portion, the necessary sintering reaction at both ends is not sufficiently performed, and the air volume distribution is unbalanced. The shortage of air in the central portion adversely affects the sintering reaction in the central region, and deteriorates the yield of sintered ore.
[0005]
In order to solve this problem, the width of the great bar near the side wall that constitutes the pallet truck was enlarged, the widened portion was blinded, or the width of the great bar attachment portion was made larger than the width of the suction portion at the lower end of the pallet. It is known that the structure (see Japanese Patent Application Laid-Open No. 9-12165) reduces the amount of air passing through both ends of the pallet and suppresses the unevenness of the wind speed in the width direction of the pallet. In order to adopt these measures, it is necessary to make the width of the great bar attachment part larger than the width of the air suction part at the bottom of the pallet. Cannot be widened, and its cost is several hundred million yen, which is disadvantageous in terms of investment recovery.
[0006]
When the pallet is divided in the width direction, it is possible to widen the width by separating only the both ends and replacing it with widening parts manufactured in advance. However, in order to interchange the widening parts, since expanding width construction schedules are required for long-term, it is implemented in terms of sintered ore production ensuring extremely difficult.
As shown in FIG. 10, German Patent Publication (DE-B-39353), which is one of the prior arts in which the width is increased by arranging additional members at both ends of a great pallet truck, is shown in FIG. A structure is shown in which an additional member 25 having a flat plate portion 24 connected to the side end surface of the great bar 16 is provided at the upper end of the wind box 9, and the sidewall 17 is arranged at the outer end of the additional member 25. On the great bar 16 including the additional member 25, a sintering raw material is charged.
[0007]
The detailed structure is as shown in FIG. 11, in which a great bar 16 is surrounded by a pallet side wall 14 having a shortened upper portion, and an additional member 25 having a flat portion 24 extending widely outward is mounted on the pallet side wall 14. . A sidewall 17 extending upward is fixed to the outer end of the additional member 25, so that the pallet can be widened. As another example of the detailed structure, a frame member 26 is attached to the outside of the pallet side wall 14 as shown in FIG. 12, and a horizontal flange portion 27 is provided above the frame member 26. An additional member 25 is disposed on a horizontal flange portion 27 constituting the frame member 26, and a protruding member 28 is disposed so as to be connected to the outside of the flange portion 27. Further, the additional member 25 and the protruding member 28 Sidewalls 17 are arranged on the corner portions to be formed. The additional member 25 is fixed to the frame member 26 through the side wall 17 by a bolt 29 so that the pallet can be widened.
[0008]
[Problems to be solved by the invention]
In the German Patent Publication (DE-B-39353), in the structure shown in FIG. 11, in order to remove the damaged great bar 16 from the pallet body beam 13 and replace it with a new one, it is necessary to add a because it requires a long time to expand the width construction must remove the member 25, implementation is difficult in terms of sintered ore production ensure necessary. Further, it is necessary to newly manufacture a pallet side wall 14 having a shortened upper portion and an additional member 25 disposed on the pallet side wall 14. Further, when the removed existing sidewall 17 is attached to the upper surface of the side end portion of the additional member 25, the upper end of the sidewall 17 is higher by the height of the additional member 25 than when the conventional additional member 25 is not installed. As a result, when the sidewall 17 moves, there is a risk of interfering with the incidental facilities, and it becomes difficult to reuse the existing sidewall 17. For this reason, there is a problem that the equipment cost increases.
[0009]
Further, the structure shown in FIG. 12 is a divided structure in which a frame member 26 is provided outside the pallet side wall 14, and an additional member 25 is disposed on a horizontal flange portion 27 that constitutes the frame member 26. Because of the complicated structure in which the protruding members 28 are arranged on the outside, all of them need to be newly provided. Further, since the side wall 17 is arranged on the corner formed by the additional member 25 and the protruding member 28, the height of the side wall 17 is significantly higher than that of the conventional one, so that the existing side wall 17 cannot be used. For this reason, there is a problem that the equipment cost further increases.
[0010]
The present invention, the conventional and solve the problems of the art, existing constituting the pallet truck with Upon increasing the productivity of the sintered ore by widening the end portions of the existing pallet truck, to simplify remodeling structure It is an object of the present invention to provide a pallet truck widening device in a sintering machine suitable for reducing the remodeling cost by reusing parts as much as possible.
[0011]
[Means for Solving the Problems]
The present invention according to claim 1, which achieves the above object, is a widening device for a pallet truck in a sintering machine, which is detachably mounted on a side wall of a pallet constituting the pallet truck adjacent to an outer end of a great bar. A flat widening receiving plate disposed horizontally, a widening blind plate removably disposed on the great bar side of the flat widening receiving plate, and the widening blind plate adjacent to the outside of the widening blind plate. An existing side wall detachably mounted on the receiving plate, and a horizontal opening provided in the lower part of the side wall, through which a holding rod portion is inserted from the inside toward the outside, and detached so as to press down the widening blind plate from above. A pallet truck in a sintering machine, comprising:
[0012]
The present invention according to claim 2 is characterized in that a great bar holder for attaching a great bar is provided on the surface of the widening blind plate placed on the great bar side on the flat widening receiving plate. Item 2. A widening device for a pallet truck in the sintering machine according to Item 1.
The present invention according to claim 3 is a widening device for a pallet truck in a sintering machine, wherein a height corresponding to a plate thickness is provided on a side wall of a pallet constituting the pallet truck adjacent to an outer end of a great bar. A bent widening receiving plate that is detachably arranged by lowering the level only outward, and a lower surface mounted on the great bar side on the bent widening receiving plate is bent so that the upper surface is flat. A blind plate, an existing sidewall removably disposed on an outer surface adjacent to the outside of the widening blind plate and having a reduced level of the widening receiving plate, and a horizontal plate provided below the sidewall. A pallet truck widening device in a sintering machine, comprising: a holding plate that is detachably disposed so as to hold the widening blind plate by inserting the holding rod portion from the inside toward the outside from the opening. is there.
[0013]
The present invention according to claim 4, wherein the great bar is mounted on the surface of the widening blind plate whose lower surface is bent and whose upper surface is flat on the bent bar side on the bent widening receiving plate. 4. The widening device for a pallet truck in a sintering machine according to claim 3, wherein a holding body is provided.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a plurality of pallet body beams 13 are arranged at right angles on a pallet side wall 14 constituting the pallet truck 7, and a beam head 18 of each pallet body beam 13 has abrasion resistance. , And a heat insulating insulation cover 19. A large number of great bars 16 are sequentially set between the pallet body beams 13 before and after the insulation cover 19 is covered.
[0015]
As shown in FIG. 3, on the pallet side wall 14 constituting the pallet truck 7, a detachable flat widening receiving plate 30 is horizontally fixed by bolts and nuts 36 adjacent to the outer end of the great bar 16. Are located. Further, on the widening receiving plate 30, a flat widening blind plate 31 is placed on the great bar 16 side. In this case, a loose hole 38 is provided in the widening blind plate 31 corresponding to the head of the bolt / nut 36 so that the head of the bolt / nut 36 does not prevent the placement of the widening blind plate 31. Alternatively, a notch reaching the side end of the widening blind plate 31 is provided. Further, on the widening receiving plate 30 adjacent to the outside of the widening blind plate 31, the sidewall 17 is detachably fixedly arranged by another bolt / nut. In addition, the sliding between the seal bar 21 incorporated in the lower portion of the pallet side wall 14 and the wear bar 22 on the fixed side provided at the upper end of the wind box 9 prevents leakage.
[0016]
A horizontal opening 34 is provided at a lower portion of the side wall 17, and a holding rod portion 33 provided at one end of the holding plate 32 is inserted through the horizontal opening 34 from the inside to the outside, and the widening blind plate 31 is raised. The presser plate 32 is detachably disposed so as to be pressed down from above. A fixing pin 39 is attached to the holding rod 33 protruding outside the sidewall 17 by passing the horizontal opening 34 from the inside to the outside, and is fixed so that the pressing plate 32 does not come off inside. In addition, if the corner holding part 37 which contacts the inner surface of the sidewall 17 is provided on the upper surface of the holding plate 32, the holding plate 32 does not hang down by the corner holding part 37 when the pallet truck 7 is turned to the return side. The widening blind plate 31 can be reliably supported.
[0017]
Next, the procedure for widening the pallet truck in the sintering machine of the present invention will be described. In the pallet truck 7 of the conventional structure shown in FIG. 9, first, the bolts and nuts 36 are removed and the side wall 17 arranged on the pallet side wall 14 is removed. Remove it. Subsequently, as shown in FIG. 3, the widening receiving plate 30 is fixedly arranged on the pallet side wall 14 using bolts and nuts 36.
[0018]
Next, a flat widening blind plate 31 is placed on the great bar 16 side on the widening receiving plate 30. In this case, the head of the bolt / nut 36 places the widening blind plate 31 thereon. A loose hole 38 is provided in the widening blind plate 31 corresponding to the head of the bolt / nut 36 so as not to interfere. Further, the existing side wall 17 removed earlier is attached to the widening receiving plate 30 outside the widening blind plate 31 by using bolts and nuts 36.
[0019]
Subsequently, the holding rod portion 33 is inserted from the inside toward the outside into the horizontal opening 34 provided at the lower portion of the side wall 17, and the holding plate 32 is placed so as to be pressed onto the widening blind plate 31. A series of widening operations can be completed in a short time by attaching the fixing pins 39 to the holding rod portions 33 protruding outward from the horizontal openings 34 of the sidewalls 17. The reverse removal operation is also easy, and the removal of the great bar 16 can be performed in the same manner as in the related art. The means for fixing the holding plate 32 is not limited to the fixing pins 39, but may be bolts, nuts, cotters, or the like.
[0020]
According to the embodiment of the present invention, it is possible to widen the pallet truck for increasing sinter production simply by newly preparing the widening receiving plate 30, the widening blind plate 31, and the pressing plate 32. Further, when the sintering raw material layer 8 is formed on the pallet truck 7 widened according to the present invention and the sintering process is performed, the flow of excess air in both end regions of the pallet near the sidewall 17 is suppressed by the widening blind plate 31. Can be. Therefore, as compared with the case where the width is widened with the conventional structure, the unevenness in the air volume distribution in both end regions and the center region of the sintering material layer loaded on the pallet truck 7 is eliminated, and the uniformity in the pallet width direction is improved. Since the sintering reaction is promoted, the yield of the sinter is improved.
[0021]
In the embodiment, since the existing sidewall 17 is mounted on the widening receiving plate 30 disposed on the pallet side wall 14, the upper end of the sidewall 17 is higher than the conventional case by the thickness of the widening receiving plate 30. Increases. For this reason, when the pallet cart 7 moves together with the sidewall 17, there is a risk of colliding with the existing equipment installed near the sidewall 17, and the existing sidewall 17 and peripheral equipment may need to be modified. .
[0022]
In such a case, as shown in FIG. 4, the level is lowered outward by a height corresponding to the plate thickness on the pallet side wall 14 constituting the pallet truck 7 adjacent to the outer end of the great bar 16. The widened receiving plate 30 bent as described above is removably disposed using bolts and nuts 36. A widening blind plate 31 whose lower surface is bent and whose upper surface is flat is placed on the great bar side on the bent widening receiving plate 30. Further, the existing side wall 17 removed earlier is attached to the outside of the widened receiving plate 30 whose level has been lowered using bolts and nuts 36.
[0023]
Then, similarly to the above-described procedure, the holding rod portion 33 is inserted from the inside toward the outside through the horizontal opening 34 provided at the lower portion of the sidewall 17, and the holding plate 32 is placed on the widening blind plate 31. A fixing pin 39 is attached to the holding rod portion 33 protruding outward from the horizontal opening 34 to fix the holding plate 32. In this case, the upper end of the side wall 17 can be made the same height as the conventional one, so that the existing side wall 17 can be used as it is, and it is not necessary to modify the peripheral equipment through which the side wall 17 passes.
[0024]
As shown in FIG. 5, a great bar is mounted on the widened receiving plate 30. The large bar is attached to and arranged on the surface of the widening blind plate 31 whose lower surface is bent and whose upper surface is flat. It is also possible to adopt a structure in which the body 35 is provided. In this case, since the great bar holder 35 is located at both ends in the width direction, it is not necessary to cover the insulator cover, and has a shape corresponding to the outer shape of the insulator cover 19 covering the beam head 18 of the pallet body beam 13. . By setting the grate bar 16 here with the insulator cover 19 and the great bar holder 35 being continuous, the grate bar 16 can be arranged to the inside of the sidewall 17. In this way, the grate bars 16 arranged on the great bar holder 35 allow a small amount of air to flow over the widening blind plate 31. It is effective in mitigating.
[0025]
If necessary, the great bar holding member 35 can be provided on the surface of the flat widening blind plate 31 shown in FIG. 3, and it goes without saying that the same effect can be obtained. Further, in the above-described embodiment, the case where the pallet truck in the existing sintering machine is modified has been described, but the present invention can of course be applied to the case where a sintering machine is newly installed. In this case, if necessary, remove the widening receiving plate, widening blind plate and holding plate arranged on the pallet side wall, and simply place the sidewall on the pallet side wall to return to the pallet truck of the conventional structure. it can.
[0026]
【The invention's effect】
As described above, the present invention is applicable to the case where a downward suction type sintering machine is newly installed, and according to the pallet truck widening device in the sintering machine of the present invention, both ends of the pallet near the side wall are provided. Excessive flow of air into the region can be suppressed. This eliminates uneven air volume distribution at both end regions and the central region of the sintering material layer loaded on the pallet, promotes a uniform sintering reaction in the width direction of the pallet, and improves the yield of sinter. Is achieved.
[0027]
Also, in order to increase the pallet width by modifying the both ends of the existing pallet truck to increase the sintering capacity of the sintering machine, remove the existing sidewalls from the side walls of the pallet. After that, the widening of the pallet truck in the sintering machine can be easily performed simply by newly arranging the widening receiving plate, widening blind plate and presser plate on the pallet side wall and relocating the existing sidewall. It is possible to reduce the equipment cost required for remodeling. Non-uniform air volume distribution at both end regions and the central region of the sintering raw material layer loaded on the pallet can be eliminated, uniform sintering reaction in the pallet width direction is promoted, and the yield of sinter The improvement is similar, and a reduction in sinter production costs is achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a pallet truck in a sintering machine of the present invention.
FIG. 2 is a perspective view showing FIG. 1 from an opposite direction.
FIG. 3 is a front view showing the direction of arrow AA in FIG. 2;
FIG. 4 is a front view showing another embodiment of the pallet truck in the sintering machine of the present invention.
FIG. 5 is a front view showing still another embodiment of the pallet truck in the sintering machine of the present invention.
FIG. 6 is a side view showing the overall arrangement of a conventional downward suction type sintering machine.
FIG. 7 is a sectional view showing a width direction of a pallet truck in a conventional sintering machine.
FIG. 8 is a sectional view showing a longitudinal direction of a pallet truck in a conventional sintering machine.
FIG. 9 is a cross-sectional view showing a width direction side end of a pallet truck in a conventional sintering machine.
FIG. 10 is a cross-sectional view showing a widthwise side end of another pallet truck in a conventional sintering machine.
11 is a detailed cross-sectional view showing a width direction side end of the pallet truck of FIG. 10;
12 is a detailed cross-sectional view showing a deformation of a width direction side end of the pallet truck of FIG. 10;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sintering raw material 2 Raw material hopper 3 Drum feeder 4 Driving sprocket 5 Sloping plate 6 Ignition furnace 7 Pallet truck 8 Sintering raw material layer 9 Wind box 10 Exhaust gas duct 11 Exhaust gas dust collector 12 Suction exhauster 13 Pallet main body beam 14 Pallet side wall 15 Track Reference Signs List 16 Great bar 17 Side wall 18 Beam head 19 Insulation cover 20 Wheel 21 Seal bar 22 Wear bar 23 Side end surface 24 Plate portion 25 Additional member 26 Frame member 27 Flange portion 28 Projection member 29 Bolt 30 Widening receiving plate 31 Widening Blind plate 32 Holding plate 33 Holding rod portion 34 Horizontal opening 35 Great bar holder 36 Bolt / nut 37 Corner holding portion 38 Loose hole 39 Fixing pin

Claims (4)

A widening device for a pallet truck in a sintering machine, comprising: a flat widening receiving plate disposed on a side wall of a pallet constituting the pallet truck so as to be detachably horizontally adjacent to an outer end of a great bar; A widening blind plate removably disposed on the great bar side on the widening receiving plate, and an existing sidewall removably disposed on the widening receiving plate adjacent to the outside of the widening blind plate, A holding plate that is detachably disposed so that the holding rod portion is inserted from the inside toward the outside through a horizontal opening provided at a lower portion of the sidewall, and the widening blind plate is pressed from above. Widening device for pallet trucks in sintering machines. The pallet for a sintering machine according to claim 1, wherein a great bar holder for attaching a great bar is provided on the surface of the widening blind plate placed on the great bar side on the flat widening receiving plate. Dolly widening device. A widening device for a pallet truck in a sintering machine, wherein a level is lowered outward on a pallet side wall constituting the pallet truck by a height corresponding to a plate thickness adjacent to an outer end of a great bar. A bent widening receiving plate detachably disposed, a widening blind plate having a flat upper surface with a bent lower surface placed on the great bar side on the bent widening receiving plate, and the widening blind plate An existing side wall removably disposed on the outer side surface adjacent to the outside and having a reduced level of the widening receiving plate, and held from the inside to the outside at a horizontal opening provided at a lower portion of the side wall A pressing plate detachably disposed so as to press the widening blind plate by inserting a rod portion, and a pallet truck widening device for a sintering machine. On the surface of the widening blind plate whose lower surface is bent and the upper surface is flat and the upper surface placed on the great bar side on the bent widening receiving plate is provided with a great bar holder for attaching the great bar. 4. A widening device for a pallet truck in a sintering machine according to claim 3.

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