JPH0343225Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a bar used in a sieve for classifying raw materials in a sintering machine used in the steel industry.

[Conventional technology]

Conventionally, in the steel industry, when producing sintered ore to be charged into blast furnaces, iron ore powder of approximately 10 mm or less is mixed with coke of an appropriate particle size and limestone powder as necessary, and then loaded into sintered pallets. A sintering machine is used that ignites the coke on the surface after entering the coke, burns the coke while sucking air downward, and uses the combustion heat to sinter the fine ore. In such a sintering machine, sintering progresses through the combustion of coke, so the supply of air to the sintered layer, that is, the quality of the ventilation of the sintered layer, is a major factor that influences the operation.

Normally, in down draft sintering, when raw materials and coke are distributed with uniform particle size in the height direction of the sintered layer, the temperature becomes higher toward the lower layer due to the characteristics of heat movement within the sintered layer. Airflow resistance increases.

As a means to prevent such drawbacks, for example, there is a classification and charging device for sintering raw materials disclosed in Japanese Patent Application Laid-Open No. 61-223136. As shown in FIG. 3, this device is provided with a large number of bars 51 extending in the pallet advancing direction above a sintering pallet 50, and at least one end of these bars 51 is provided at different levels, as shown in FIG. 4, for example. , the sintering raw material is charged through the bar 51 to form a sintering raw material layer.

To explain this charging device in more detail, the hopper 5
The sintering raw material 53 stored in the drum feeder 54 is cut out from the drum feeder 54, passes through the sloping plate 55, and falls onto the bar 51. In this case, the bars 51 are inclined so that the entrance side of the pallet 50 is at a lower level, and the tips of the bars 51 are uneven, so that the distance between the bars increases toward the tips. Therefore, among the sintering raw materials 53 that have fallen onto the bar 51, fine particles fall onto the pallet 50 from the base end of the bar 51, and coarse particles are charged into the pallet 50 from the tip. On the entering pallet 50, classified charging is performed with coarse grains in the lower layer and fine grains in the upper layer, and the falling energy of the raw material 53 is alleviated by the bar material 51, so that low-density charging is performed. An ideal filled layer 56 with low ventilation resistance is obtained.

[Problem that the invention attempts to solve]

By the way, in these sintering machines, the raw material falling from the sloping plate always concentrates on a certain point on the bar 51 and collides with it.
The bar 51 had to be replaced each time local wear occurred on the bar 51. However, this required the sintering machine to be stopped regularly and the replacement work was carried out in a confined space, which led to a decrease in production efficiency. It takes a lot of effort to
Furthermore, there was a problem in that a large amount of expensive bar material was wasted.

The present invention has been devised to solve the above-mentioned problems, and provides a bar mounting structure that facilitates installation and removal and makes effective use of the bar.

[Means for solving problems]

The technical means of the present invention for solving the above problems is to construct a sieve by making the tips of a large number of bars arranged above the pallet of the sintering machine in the direction of pallet entry into different levels, and In a sintering machine in which sintering raw materials are dropped and classified and charged onto a pallet, there is a cylindrical holder perpendicular to the horizontal axis that supports the bar at the base end, and a cylindrical holder on the side of the holder. A cylindrical housing is installed at right angles, and a spool whose tip reaches inside the holder is inserted into the housing, and a spring is installed to bias the spool toward the holder, and the rod fitted into the holder is fixed. The spool is inserted into the hole and the rod is supported by a holder.

[Effect]

The holder is constructed as described above, and the holder is installed perpendicularly to the horizontal axis with a predetermined angle of depression with respect to the pallet advancing direction, and the spool in the housing is pulled outward against the spring. This allows the bar to be easily inserted into the holder.If the fixing hole is aligned with the spool's insertion direction and the spool is inserted, the bar will be supported by the holder and installed in a predetermined position relative to the pallet. It will be done.

〔Example〕

FIG. 1 is a side view showing a bar mounting structure according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the main part of FIG. 1.

The holder 1 has a cylindrical shape and is attached at a right angle to a horizontal shaft 2 which is suspended above the pallet with a predetermined angle of depression with respect to the direction in which the pallets enter. Cylindrical housing 3
is installed. A top cover 4 is attached to the end of the housing 3, and a spool 5 whose tip end reaches inside the holder 1 is inserted through the top cover 4 vertically. A knob 6 is attached to the head of the spool 5, and a housing 3 is attached near the middle of the spool 5.
A spring receiving plate 7 is attached inside the housing 3, and a spring 8 is attached between the upper cover 4 of the housing 3 and the spring receiving plate 7 to urge the spool 5 toward the holder 1. Further, a packing 9 is inserted into the longitudinal portion of the upper cover 4, and a spring 8 simultaneously causes a knob 6 to press the packing against the upper cover 4 to prevent dust from entering.

The bar 11 has fixing holes 12 drilled in the cross direction at predetermined positions on both ends thereof, as shown in FIG. After aligning the fixing hole 12 of the bar 11 with the penetrating direction of the spool 5 and penetrating the pool 5, the bar 1
1 is supported by holder 1.

The structure is as described above, and when replacing the bar 11, the bar 11 can be easily replaced by pulling up the spool 5.
1 can be inserted and removed. In addition, if local wear occurs on the bar 11, the life of the bar 4 can be further extended by rotating the bar 11 sequentially and switching the tip and base ends of the bar 11. .

Next, a specific example of the present invention will be explained.

Drill 6mmφ fixing holes in a cross direction at positions 50mm from both ends of a chrome-plated steel bar with an outer diameter of 13mm and a total length of 1m, insert it into a holder with an inner diameter of 14mm and a length of 100mm, and then Although I held it in place with a spool, the rod did not fall out, and the spool remained in that state for easy operation for a long period of time. Also, the installation direction of the bar,
By replacing the mounting side according to its wear condition, the bar material, which used to be replaced every 3 months and went out of business, can be replaced in about 3 months.
I was able to use it for 12 months.

[Effect of idea]

As explained above, the present invention involves attaching a holder to the horizontal shaft that supports the bar, allowing the bar to be inserted into and removed from the holder using a spool, and having appropriate cross-shaped fixing holes at both ends of the bar. By providing holes in the bar, the bar can be rotated or replaced at appropriate times depending on the wear condition of the bar, and local wear can be prevented. It can be easily replaced,
The production efficiency of the sintering machine can be improved along with the effective use of bar materials.

[Brief explanation of the drawing]

Fig. 1 is a side view of a bar mounting structure which is an embodiment of the present invention, Fig. 2 is a sectional view showing the main parts of Fig. 1,
2A is a sectional view taken along the line XX in FIG. 2, FIG. 3 is a schematic side view of the classification and charging device, and FIG. 4 is a front view showing an example of the arrangement of bars. 1...Holder, 2...Horizontal shaft, 3...Housing, 4...Top lid, 5...Spool, 6...Knob, 7...Spring receiving plate, 8...Spring, 9...
...Packing, 11...Bar material, 12...Fixing hole.

Claims (1)

[Scope of utility model registration request] A sieve is constructed by arranging a large number of bars above the pallet of the sintering machine in the direction in which the pallet enters the pallet, and the tip sides thereof are stepped to form a sieve, and the sintering raw material is dropped onto the sieve and classified and charged onto the pallet. In this sintering machine, a cylindrical holder is installed at right angles to the horizontal axis to support the bar at its base end, and a cylindrical housing is attached at right angles to the side of the holder. A spool whose part reaches inside the holder is inserted, a spring is attached to bias the spool toward the holder, and the spool is inserted into the fixing hole of the bar fitted into the holder to support the bar in the holder. A bar mounting structure for a classification sieve in a sintering machine, which is characterized by: