JP4960555B2 - Widening device for sintering machine pallet truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a widening device for a pallet truck in a downward suction type sintering machine used for the production of sintered ore.
[0002]
[Prior art]
The sintered ore inserted into the blast furnace is generally sintered using a downward suction type sintering machine. In the downward suction type sintering machine, the sintered raw material is continuously filled on the moving pallet truck to form a sintered raw material layer on the pallet truck. Next, the sintering raw material layer on the pallet truck is ignited in an ignition furnace, and is sucked by a suction exhaust fan from a wind box (suction part) arranged on the lower side of the pallet truck. The raw material layer undergoes a sintering reaction by air passing downward from the surface, and becomes a sintered ore. Sinter is continuously discharged in the discharge section. In the continuous sintering of the sintering raw material by such a downward suction type sintering machine, the wind speed rises in the vicinity of the side wall of the pallet truck from the central portion of the sintering raw material layer due to the wall effect, and air flows excessively. The reason why the wind speed in the vicinity of the sidewall is increased is that the porosity between the raw material particles and the sidewall wall surface is larger than the porosity when the raw material particles are filled with each other. Further, as the filling raw material is sintered, the sintered raw material shrinks due to the 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 of the pallet truck, the sintering time is shortened due to excess air compared to the central part, the necessary sintering reaction is not performed sufficiently, and the air in the central part is insufficient due to the unbalance of air volume This adversely affects the sintering reaction at the center and deteriorates the yield of sintered ore.
[0003]
In view of such a current situation, devices such as expanding the width of the great bar near the side wall constituting the pallet truck and narrowing the flow path below the great bar have been proposed, and recently, a device with less cost For example, devices disclosed in DE-B-39353, JP-A-11-159968, and JP-A-11-269562 have been proposed.
[0004]
[Problems to be solved by the invention]
In the apparatus of German Patent DE-B-39353 as shown in FIG. 1, the pallet carriage side wall 1 surrounds the great bar 2, and the pallet carriage side wall is located above the pallet carriage side wall at the outer end of the additional portion 3 extending upward. A structure is disclosed in which the pallet is widened by attaching the additional part 3 extending to the outer side and fixing the sidewall 4 extending upward to the outer end of the additional part 3. However, in this widening structure, when the damaged great bar 2 is replaced, the additional part 3 must be removed from the pallet carriage side wall 1 and the sintering machine needs to be stopped for a long time. Implementation is difficult in terms of securing the quantity. Moreover, since the additional part 3 is impermeable to air, an unfired part 5 is generated in the sintering process, leading to a deterioration in sintered ore yield. Furthermore, since it is necessary to operate the mounting bolt 6 to remove the additional portion 3, it is necessary to increase the thickness of the additional portion due to the structure. The upper end of 4 is increased by the thickness of the additional portion 3. For this reason, it is difficult to divert existing side walls, and it is necessary to purchase new side walls having a low height.
[0005]
Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 11-159968 shown in FIG. 2, a flat widening receiving plate 7 that is detachably disposed horizontally adjacent to the outer end of the great bar 2, and the flat widening receiver. A widening blind plate 8 detachably disposed on the side of the great bar on the plate, a sidewall 4 detachably disposed on the widening receiving plate adjacent to the outside of the widening blind plate, and the sidewall A widening structure of a pallet comprising a holding plate 11 detachably disposed so that a holding rod portion 10 is inserted through a hole 9 provided in a lower portion of 4 from the inside toward the outside and the above-mentioned widening blind plate is pressed from above. Is disclosed.
[0006]
However, in this widened structure, although it is relatively easy to replace the damaged great bar 2, the blind plate 8 is fixed by the holding rod portion 10 that passes through the side wall 4, so that the side wall 4 is inserted through the holding rod portion 10. Therefore, it is necessary to replace all of the holes 9 with holes 9 for opening, which requires a large amount of cost. Moreover, when the strength of the holding rod part 10 is insufficient and it breaks, there is a concern that the blind plate may fall and cause a major equipment accident. Furthermore, the widened portion is impermeable and may cause an unfired portion.
[0007]
Further, as a technique for preventing the unfired portion from occurring, as shown in Japanese Patent Application Laid-Open No. 11-269562 shown in FIG. 3, blinding is performed for the purpose of preventing excessive air from flowing near the pallet carriage side wall. Measures have been proposed in which unevenness 12 is formed on the plate 8 to create air passages and to suppress the occurrence of unfired parts to some extent.
[0008]
However, a specific structure for widening the pallet carriage and a holding mechanism for the blind plate are not clearly disclosed.
[0009]
Therefore, the present invention, by simple modification of the equipment, widens both ends of the existing sinter pallet truck to increase the firebed area, and also creates a passage for air in the widened part to generate unfired parts. An object of the present invention is to provide a pallet cart widening device that can be suppressed and increase the productivity of sintered ore.
[0010]
[Means for Solving the Problems]
The present inventor, as a widening device for a sintering machine pallet carriage, includes a blind plate that is detachably disposed on a flat plate for widening, and is installed on an insulation piece or an insulation piece that is placed on the pallet main beam. It has been found that if one or both of them are held and held, the blind plate can be prevented from falling, and the structure can also be achieved by a simple modification of the existing sintering machine pallet carriage.
[0011]
The present invention has been completed based on the above findings, and the gist of the invention is as follows.
[0012]
(1) A widening device for a downward suction type sintered pallet truck equipped with an insulation piece, and a widening plate horizontally arranged on the side wall of the pallet carriage, and a blind plate detachably arranged on the widening plate; A sintering machine pallet comprising a sidewall disposed on the widening plate adjacent to the outside of the blind plate, and holding the blind plate by a convex portion provided on the insulation piece. Dolly widening device.
[0013]
(2) A widening device for a downward suction type sintered pallet truck equipped with a great bar, wherein a widening plate horizontally disposed on the side wall of the pallet cart, a blind plate detachably disposed on the widening plate, A sintering machine pallet comprising a sidewall disposed on the widening flat plate adjacent to the outer side of the widening blind plate, and holding the blind plate by a protrusion provided on a great bar. Dolly widening device.
[0014]
(3) The top of the blind plate is overlaid with a great bar held by the beam of the pallet body, a gap connected to the suction part of the pallet is provided between the blind plate and the great bar, and the widened part can also be sucked and ventilated. A widening apparatus for a sintering machine pallet truck as described in (1) or (2) above.
[0015]
(4) Any of the above (1) to (3), wherein the great bar closest to the side wall is a wide grate bar having a flat upper portion and a protruding portion protruding toward the side wall. A widening device for a sintering machine pallet truck as described in 1.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 4A is a cross-sectional view of the pallet truck, and FIG. 4B is an enlarged view of the end of the pallet truck. FIG. 5 is a perspective view schematically showing the end of the pallet truck shown in FIG. As shown in the figure, the pallet truck is configured by arranging a plurality of pallet body beams 13 in a direction perpendicular to the pallet carriage side wall 1 provided with wheels, and the beam of each pallet body beam 13. The head is covered with a heat-insulating insulation piece 14 in order to withstand high temperatures during sintering. Further, a large number of great bars 2 are set between the front and rear pallet pairs 13 covered with the insulation piece 14 so as to be fitted from the side of the insulation piece 14. And the slit-shaped clearance gap formed between each great bar 2 becomes a ventilation path.
[0017]
A flat widening flat plate 16 is horizontally fixed to the upper end portion of the pallet carriage side wall 1 so as to be detachable by a bolt nut 15 inserted into a bolt nut hole 15 ′, and a bolt nut hole is attached to the other end of the flat plate. A side wall 4 for securing the lateral side of the sintered raw material layer is fixed by a bolt and nut 17 inserted through 17 ′.
[0018]
The blind plate 8 is detachably disposed on the widening plate 16, and the lower side of the blind plate 8 corresponds to the head of the bolt nut 15 fixing the widening plate 16, A groove having the same width as or slightly wider than the head of the bolt nut 15 is machined in a direction perpendicular to the pallet carriage side wall 1. Since the head of the bolt and nut is fitted in this groove, the blind plate 8 does not move in the traveling direction of the pallet carriage. A hole may be provided instead of the groove.
[0019]
In this example, the cross-sectional shape of the blind plate 8 is L-shaped, and the thin side is arranged on the great bar 2 side, and the thick side is arranged on the side wall 4 side. On the other hand, the insulation piece 14 closest to the pallet truck side wall 1 is formed with a convex portion 18 whose upper surface on the side of the pallet truck side wall projects in the side wall direction. Therefore, as shown by the arrow in FIG. 5, after the blind plate 8 is placed on the widening plate 16, the insulation piece 14 is slid in the pallet carriage side wall direction (arrow direction) using a jig or the like. The portion 18 overlaps with the thin portion of the blind plate 8 and can be fixed by pressing the blind plate 8 from above. The shape of the convex part 18 should just have a function which presses and fixes the blind board 8, and the shape is not limited.
[0020]
Further, a structure in which a great bar is mounted on the insulation piece 14 is known. Generally, a notch is provided in the pallet main body beam 13, and the foot of the great bar is aligned with the notch position of the pallet main body beam. From there, it has a structure that allows the Great Bar to be taken in and out. At the same time that the insulation piece 14 is slid and the blind plate 8 is fixed, the notch positions of the insulation piece and the pallet main body beam are shifted so that the great bar is prevented from falling off.
[0021]
At this time, the great bar on the side of the side wall 4 is the wide bar 19 and the upper part is flat and protrudes toward the side wall, so that the protruding part 20 on the side of the wide bar is blind. Since it overlaps with the upper surface of the plate 8, the wide grate bar 19 also presses the blind plate 8, so that the blind plate 8 can be held together with the insulation piece 14. The upper surfaces of the great bar and the blind plate are designed to be in the same plane.
[0022]
As described above, the wide great bar 19 closest to the side wall has a structure in which the upper portion is flat and has a protruding portion 20 protruding toward the side wall. The projecting portion 20 is provided with a plurality of small convex portions 21 for preventing the blind plate 8 and the projecting portion 20 from coming into close contact with each other when the projecting portion 20 overlaps the blind plate 8. It is desirable to have a structure that creates a gap of 5 to 10 mm between them. This gap is in contact with the inserted raw material, and the lower part is connected to the negative pressure part of the sintering machine. Therefore, it has a structure that allows sufficient air to pass through the widened part for sintering. Thus, no unfired portion is generated in the widened portion, and the yield does not decrease. In place of the convex portion 21, a plurality of grooves and irregularities are formed on the lower side of the protruding portion 20 of the wide great bar, and an air passage is secured by the grooves and irregularities, which is equivalent to the convex portion 21. An effect can be obtained. In addition, instead of forming such protrusions, grooves, and irregularities on the protruding portion of the great bar, the same effect can be obtained by forming protrusions, grooves, irregularities, etc. on the upper surface of the blind plate facing the great bar. Can be obtained.
[0023]
Moreover, although the structure which presses the blind board 8 using both the insulation piece 14 and the wide great bar 19 was shown in this example, you may press the blind board 8 by the insulation piece 14 alone.
[0024]
In this case, it is desirable to create a gap between the protruding portion of the wide great bar and the blind plate in order to secure the air passage.
[0025]
Alternatively, as shown in FIG. 6, the blind plate 8 placed on the widening flat plate 16 can be pressed by the protruding portion of the wide grate bar 19 so that the blind plate 8 does not fall off. In this case, it is not necessary to press the blind plate with the insulation piece 14 as shown in FIGS.
[0026]
That is, the widening flat plate 16 is fixed to the upper end portion of the pallet carriage side wall 1 with the bolt nut 15, and the side wall 4 is fixed to one end of the widening flat plate 15 with the bolt nut 17. A blind plate 8 is detachably disposed on the wide plate 16 in contact with the sidewall 4. The blind plate 8 is pressed by a protruding portion of a wide grate bar 19 mounted on the pallet body beam 13 with an insulation piece 14 interposed. Thereby, the fall of the blind board 8 can be prevented. Moreover, although the wide grate bar 19 and the blind plate 8 are comprised separately, you may use the wide grate bar of the shape which integrated both by welding etc.
[0027]
【Effect of the invention】
According to the widening device for a sinter pallet truck of the present invention, the pallet can be easily used without changing the structure of the insulation piece on the side wall side of the pallet truck or the structure of the great bar on the side wall side. The trolley can be widened.
[0028]
In addition, since the air passage can be secured in the widened portion, the non-uniformity of the air volume distribution in the both end region and the central region of the sintering raw material layer can be eliminated, and the unsintered portion does not occur, so the yield of sintered ore is improved. Can do.
[Brief description of the drawings]
FIG. 1 is a view showing a widened portion of a conventional sintering machine pallet carriage.
FIG. 2 is a view showing a widened portion of a sintering machine pallet carriage using a conventional blind plate.
FIG. 3 is a view showing a conventional example in which an air passage is provided in a widened portion of a sintering machine pallet carriage.
FIG. 4 is a view showing an embodiment of a widening device for a sintering machine pallet truck according to the present invention. (A) is a general view, (b) is an enlarged view of the end of the widened portion.
5 is a perspective view schematically showing a widened portion shown in FIG. 4. FIG.
FIG. 6 is a view showing another embodiment of a widening device for a sintering machine pallet carriage according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pallet cart side wall 2 Great bar 3 Additional part 4 Side wall 5 Unfired part 6 Mounting bolt 7 Widening receiving plate 8 Blind plate 9 Hole 10 Holding rod part 11 Press plate 12 Concavity and convexity 13 Pallet body beam 14 Insulation piece 15 Bolt nut 15 'Bolt nut hole 16 Widening flat plate 17 Bolt nut 17' Bolt nut hole 18 Convex part 19 Wide grate bar 20 Protruding part 21 Convex part

Claims (4)

A widening device for a downward suction type sintered pallet truck equipped with an insulation piece, a widening plate horizontally disposed on the side wall of the pallet carriage, a blind plate detachably disposed on the widening plate, and a blind plate The widening of the sintering machine pallet carriage, which is composed of a sidewall disposed on the widening flat plate adjacent to the outside of the flat plate, and holds and holds the blind plate by a convex portion provided on the insulation piece. apparatus. A widening device for a downward suction-type sintered pallet truck equipped with a great bar, a widening plate horizontally disposed on the side wall of the pallet carriage, a blind plate detachably disposed on the widening plate, and a widening blind A widening of a pallet truck for a sintering machine, characterized in that it is composed of a sidewall disposed on the widening flat plate adjacent to the outside of the plate, and the blind plate is pressed and held by a protrusion provided on a great bar. apparatus.   The grate bar held by the beam of the pallet main body is overlaid on the upper surface of the blind plate, a gap connected to the suction part of the pallet is provided between the blind plate and the grate bar, and the widened part can also be sucked and vented. Item 3. A widening apparatus for a sintering machine pallet truck according to item 1 or 2.   The sintering machine according to any one of claims 1 to 3, wherein the great bar closest to the side wall is a wide grate bar having a flat upper portion and a protruding portion protruding toward the side wall. Widening device for pallet truck.

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