JP3590512B2 - Method of unloading piled coal - Google Patents

Description

【０００９】
注１：バケットホイール直径４８０ｃｍ、バケット個数８個。
注２：バケット長さ７０ｃｍ、巾３０ｃｍ（一般に用いられている形状）。
【００１０】
しかして、例えばこのようなデータを計算器へ予め記憶しておき、石炭の嵩比重及び平均粒径を導入することによって、このデータに基づきバケットの石炭山への切り込み量及び旋回速度の一方または双方を調整し、またバケットホイールの回転速度を調整するものである。
【００１１】
【実施例】
次に、本発明方法の実施例を挙げる。
図１において、計算器８に予め石炭の嵩比重と石炭山へのバケット切り込み量、旋回速度及び石炭粒度とバケットホイール回転速度関係データを記憶しておき、この計算器８へ揚炭すべき石炭の嵩比重（銘柄）及び石炭粒度を導入して、バケットの切り込み量、バケットホイール旋回速度、バケットホイール回転速度を決定する。この結果を主管制御器９を介してリクレーマー制御装置１０へ指示し、該リクレーマー制御装置１０からリクレーマー走行駆動装置１１へ走行速度を指令して、バケットの石炭山への切り込み量、ブームの旋回駆動装置１２へ旋回速度を指令してバケット（バケットホイール）旋回速度の一方または双方を調整し、必要に応じてバケットホイール駆動装置１３へ回転速度を指令して石炭山の揚炭を行うものである。
【００１２】
【発明の効果】
本発明方法によれば、揚炭能力を飛躍的に向上することができる。また、既設のリクレーマーで揚炭能力を向上することができるので、リクレーマーの設備能力をハード的に増強することなく、揚炭能力を向上することができ、低コストで揚炭能力を向上することができる等に優れた効果が得られる。
【図面の簡単な説明】
【図１】本発明方法の実施例を示すフロー図である。
【図２】バケットの切り込み量を示す要部側面図である。
【図３】バケットホイールの旋回状況を示す斜視図である。
【図４】リクレーマーの揚炭状況を示す側面図である。[0001]
TECHNICAL FIELD OF THE INVENTION
The method of the present invention relates to a method for unloading piled coal.
[0002]
[Prior art]
In general, as shown in FIG. 4, a boom 5 is provided on a main body 4 of a reclaimer 3 provided to move on a rail 2 laid along a longitudinal direction of a coal pile 1, and a boom 5 is rotatably provided. A bucket wheel 6 is rotatably provided at the end of the boom 5, and the bucket 7 is cut into the coal mine 1 and rotated in the width direction of the coal mine 1 while rotating, thereby unloading piled coal to a predetermined position. is there. In such coal unloading, the driving load current for rotating the bucket wheel 6 and the unloading result (metric weighing value) are linearly proportional. This raises the speed of the bucket wheel 6. For this reason, it is disclosed in Japanese Patent Publication No. 8-18700 that the overload current of the driving load current is prevented by monitoring the driving load current that rotates the bucket wheel 6 to avoid a reduction in coal unloading efficiency. Have been.
[0003]
[Problems to be solved by the invention]
The bulk specific gravity of coal varies depending on the coal-producing area (brand) (difference in cohesion of coal, etc.), and when unloading into a coal yard, it is piled up in a fixed layer from bottom to top by brand (coal pile). I do. When coal is unloaded from such a coal mine, the bucket wheel is rotated and turned in the direction of the coal ridge width from top to bottom, and coal is unloaded while coal of each brand is almost evenly unloaded. is there. Therefore, when the bucket of the bucket wheel is located on the coal bed having a large bulk specific gravity, the driving load current is high, and when the bucket is located on the coal bed having the large bulk specific gravity, the driving load current is low. Therefore, as described above, there is a problem that the coal mining efficiency cannot be increased even if the rotation speed of the bucket wheel is controlled simply by monitoring the driving load current of the bucket wheel.
The method of the present invention has been made to advantageously solve such problems, and based on the bulk specific gravity of piled coal, adjusts the amount of cut into the coal pile of the bucket, etc., and reliably improves coal unloading capacity. It is an object of the present invention to provide a method for unloading piled coal.
[0004]
[Means for Solving the Problems]
A feature of the method of the present invention is a method for unloading piled coal, characterized in that one or both of the cut amount of the bucket of the reclaimer into the coal pile and the turning speed are adjusted based on the bulk specific gravity of the piled coal. is there.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
As described above, since coals having different bulk specific gravities are piled up in the coal mine in a layered manner, the cutting amount L of the bucket 7 of the bucket wheel 6 into the coal mine 1 is adjusted based on the bulk specific gravity as shown in FIG. Further, as shown in FIG. 3, the turning speed of the bucket wheel 6 in the width direction of the coal mine 1 is adjusted. The rotation speed of such a bucket wheel 6 may be the same speed without being adjusted by the difference in bulk specific gravity, but is preferably adjusted by the particle size of the coal.
[0006]
Thus, by increasing the depth of cut of the bucket into the low-bulk specific gravity, a larger amount of coal can be put into the bucket, and furthermore, the low-bulk specific gravity coal puts a large load on the rotation of the bucket wheel. Without increasing the predetermined rotation speed, it is possible to increase the coal unloading amount. The turning speed of the bucket wheel at this time is set to a low speed to prevent a large amount of coal entering the bucket wheel from overflowing. Also, the cutting depth of the bucket into the high bulk specific gravity coal is shallow, the rotation load of the bucket wheel due to the high bulk specific gravity is reduced, the rotation speed is prevented from lowering, and the predetermined rotation speed is maintained and the coal is unloaded. Minimize volume loss. At this time, the turning speed of the bucket wheel is set to be high, so that coal can be quickly taken up into the bucket, so that coal can be uncarried without increasing the coal unloading quantity and reducing the coal unloading quantity of large bulk specific gravity coal. It is. As described above, the cutting amount into the coal pile and the turning speed are adjusted by the bulk specific gravity of the coal, but depending on the degree of the bulk specific gravity, one of the cutting amount and the turning speed of the bucket as described above is determined. Adjustment can surely increase the coal unloading amount.
[0007]
The rotation speed of the bucket wheel is preferably adjusted according to the coal particle size. When the coal particle size is coarse, the rotation speed can be increased to increase the coal unloading amount, but the coal particle size is small. When the particles become granulated, the coal is separated from the bucket by the centrifugal force caused by rotation at a low speed, and the scooping amount becomes small and the coal unloading amount is undesirably reduced. Therefore, for example, in the change of the bulk specific gravity of coal, the rotation speed of the bucket wheel is kept constant, and one or both of the cutting amount and the turning speed of the bucket into the coal mine are adjusted as described above. By adjusting the rotation speed of the coal, the coal unloading capacity can be dramatically increased.
[0008]
An example will be given of the relationship between the bulk specific gravity of the coal, the amount of cut of the bucket into the coal mine and the swirling speed, and the relationship between the coal particle size and the bucket wheel rotation speed.
[Table 1]

[0009]
Note 1: Bucket wheel diameter 480cm, number of buckets 8 pieces.
Note 2: Bucket length 70 cm, width 30 cm (commonly used shape).
[0010]
Thus, for example, such data is stored in the calculator in advance, and by introducing the bulk specific gravity and the average particle size of the coal, one of the cutting amount into the coal pile and the swirl speed based on the data is introduced based on this data. Both are adjusted, and the rotation speed of the bucket wheel is adjusted.
[0011]
【Example】
Next, examples of the method of the present invention will be described.
In FIG. 1, data relating to the bulk specific gravity of coal, the amount of bucket cut into the coal mine, the swirling speed, the coal particle size, and the rotation speed of the bucket wheel are stored in the calculator 8 in advance. Of the bucket, the bucket wheel turning speed, and the bucket wheel rotation speed are determined by introducing the bulk specific gravity (brand) and the coal particle size of the bucket. This result is instructed to the reclaimer control device 10 via the main pipe controller 9, the travel speed is instructed from the reclaimer control device 10 to the reclaimer travel drive device 11, the cut amount of the bucket into the coal mine, the boom Command the turning speed to the turning drive device 12 to adjust one or both of the bucket (bucket wheel) turning speeds, and if necessary, command the turning speed to the bucket wheel drive device 13 to carry out coal mining. Things.
[0012]
【The invention's effect】
According to the method of the present invention, the coal mining capacity can be dramatically improved. In addition, since coal refining capacity can be improved with the existing reclaimer, coal refining capacity can be improved without increasing the equipment capacity of the reclaimer in hardware, and coal refining capacity can be improved at low cost. Excellent effects can be obtained.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an embodiment of the method of the present invention.
FIG. 2 is a side view of a main part showing a cutting amount of a bucket.
FIG. 3 is a perspective view showing a turning state of a bucket wheel.
FIG. 4 is a side view showing the coal unloading state of the reclaimer.

Claims (3)

A method of unloading piled coal, comprising adjusting one or both of the amount of cut into a coal pile of a bucket of a reclaimer and a turning speed based on the bulk specific gravity of the piled coal. The method for unloading piled coal according to claim 1, wherein the rotation speed of the bucket wheel of the reclaimer is adjusted based on the particle size of the piled coal. For coal pits with low bulk specific gravity, the depth of cut of the bucket is deepened and the turning speed is adjusted to low speed. 3. The method for unloading piled coal according to claim 1 or claim 2.

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