JPH08268564A - Bucket and chain replacing method of continuous unloader - Google Patents

Abstract

PURPOSE: To sharply shorten its replacing work time by collectively and continuously replacing buckets and a chain in a bucket elevator of a continuous unloader. CONSTITUTION: A new chain 12N on which buckets 9 corresponding to a revolving total length quantity of a bucket elevator 5 are preinstalled, is arranged in series on a quay 1 in the rail laying direction, and a chain 12 in the bucket elevator 5 is divided, and its one end part 12a is fixed to the quay 1, and the other end part 12b is connected to an opening end part 12Na of the new chain 12N, and a traveling frame is made to travel, and respective sprockets are rotated at equal peripheral velocity. Therefore, the new chain 12N is wound round respective sprocket groups in the bucket elevator 5, and when the installed chain 12 is delivered, the delivered chain 12 and the wound chain 12N are divided, and both ends of the new chain 12N wound in the bucket elevator 5 are connected to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of replacing a bucket and a chain used in a bucket elevator of a continuous unloader.

[0002]

2. Description of the Related Art In a bucket elevator type continuous unloader, a swing frame is swingably supported on a traveling frame movable along a quay, and a tip end portion of a boom projecting laterally from the swing frame. Bucket elevators are supported. Also, this bucket elevator
For example, the axis thereof is always vertical, and a chain bucket that moves endlessly inside the elevator shaft to orbit is provided. In addition, this chain bucket is configured by attaching a plurality of buckets to a chain that circulates while moving from at least a lower direction to an upper direction along a plurality of sprockets, for example, by mounting a plurality of buckets on a support portion projecting from a pin of the chain. Due to the size and weight of the bucket and the chain, which will be described later, the bucket is hung between the two chains so that the bucket is hung, and in particular, a scraping portion is formed in the lower part thereof.

[0003] When the chain bucket is moved and circulated in a state where the bucket elevator is erected in the hold, the scraping unit scrapes bulk cargo such as coal and ore in the hold into the bucket. , Is carried as it is along the inside of the column member constituting the elevator shaft to the uppermost portion of the bucket elevator, and then it is rotated along with the chain rotating along the sprocket at the uppermost portion. By the turning of the bucket, the load in each bucket is discharged to the rotary feeder arranged on the outer periphery of the uppermost part of the bucket elevator via the discharging chute provided on the uppermost part of the bucket elevator. The load discharged to the rotary feeder is transferred to the belt conveyor installed on the boom via the rotary feeder, is transported to the chute section of the swing frame, and is directly transferred by the chute section to the conveyor inside the machine. It is carried out to the equipment on the ground side.

[0004]

By the way, the chain of the bucket elevator is, for example, caused by abrasion of pins or bushes or rollers due to sliding during passage of the sprocket, elongation of the link due to load accompanying lifting of the bucket and load, and the like. Replacements occur about once every two years. This must be done, for example, in accordance with the rule "Changing the chain length by 5% and replacing all the pieces" described in the Crane Law.

Further, the bucket of the bucket elevator is abraded due to contact with the load, particularly during scraping of the load, that is, during excavation, and this also causes physical replacement. When such a bucket and chain are replaced, this type of continuous unloader is a huge facility because of its cargo handling efficiency and the size of the cargo hold, and the bucket and chain are inevitably large and heavy. Therefore, in consideration of the safety of the replacement work, conventionally, the chain pins corresponding to the length corresponding to two to three buckets, that is, the so-called number of pieces are pulled out, and the relatively short chain between them is removed together with the bucket, Of the removed buckets, reusable buckets are removed from the removed chain, in which case the removed buckets are replaced with new buckets that cannot be reused, and the number of removed pieces is equal to the number of removed pieces. Attached to a new chain of
A new chain with this bucket attached is replaced by inserting a pin into the removed chain portion, and this is repeated sequentially to replace the entire chain and bucket.

However, in such a bucket and chain replacement method, for example, when the number of buckets per bucket elevator is about 80, the chains are attached and detached about 30 times during the replacement work. Considering the size and weight of the bucket and the chain, for example, four workers need 7 to 10 days for the entire replacement work. Therefore, a lot of man-hours are required, and the replacement cost is increased, and the continuous unloader is stopped for a long period of time, and it becomes impossible to carry the cargo during that time, so that a loss such as payment of shipping fees is also increased.

The present invention has been developed in view of these problems, and at least the replacement work time of the bucket and the chain can be significantly shortened to reduce the cost for the replacement, and the cargo handling An object of the present invention is to provide a bucket and chain replacement method for a continuous unloader that shortens down time and greatly reduces loss.

[0008]

In order to solve the above problems, a bucket and chain replacing method for a continuous unloader according to claim 1 of the present invention is a sprocket having a plurality of chains to which buckets are attached. Equipped with a bucket elevator that moves in a series along and circulates, scrapes the cargo in the cargo into each bucket by the scraping part provided at the bottom of the bucket elevator, and transports the bucket elevator as a whole on the quay. A bucket and chain replacement method for a movable continuous unloader, wherein a chain having a length corresponding to the entire circulating length of the bucket elevator and having both ends attached to the bucket in advance is not connected to the bucket. A chain attached to the bucket elevator, which is arranged in series on the quay along the movable direction of the entire elevator, and is attached to the bucket elevator. A part is divided, and then one end of the divided chain is fixed to the quay and the other end of the divided chain is connected to one end of the chain extended and arranged on the quay, The bucket elevator is moved in the arrangement direction of the chain and the chain of the bucket elevator is moved in the winding direction to wind the chain on the quay into the bucket elevator, and the chain on the quay to wind in the bucket elevator. After the chain that has been installed and attached to the bucket elevator is discharged, the connecting portions of the two chains are divided, and both ends of the chain wound around the bucket elevator are connected.

In the bucket and chain replacing method for a continuous unloader according to a second aspect of the present invention, when the chain disposed on the quay is wound up, it is wound around the sprocket on the winding side. It is characterized in that the chain is pressed by a pressing roller.

[0010]

In the bucket and chain replacing method of the continuous unloader according to claim 1 of the present invention, the chain attached to the bucket elevator is divided, one end of which is fixed to the quay and the other end of which is fixed. Is connected to one end of the chain placed on the quay, and the entire bucket elevator is moved in the direction in which the chain is placed on the quay while moving the chain in a predetermined traveling direction. The chain that is installed in the bucket elevator is pulled up by the chain that is installed in the bucket elevator, and is wound around the sprocket group in the bucket elevator. At the same time, the chain that was installed in the bucket elevator is discharged to the quay. , The chain on the quay is wound into the bucket elevator and When the chains attached to the motor are paid out, at least all buckets and chains are grouped together by dividing the connecting part of both chains and connecting both ends of the chain wound on the bucket elevator. Therefore, the replacement work time can be greatly shortened. Further, among the buckets attached to the replaced chain, the reusable bucket can be detached from the chain after the chain replacement work and can be reused when the next bucket and the chain are replaced. .

Further, in the bucket and chain replacing method of the continuous unloader according to claim 2 of the present invention, the chain wound around the sprocket on the winding side is pressed down by the pressing roller, so that It is possible to ensure smooth and reliable meshing of the chain arranged on the sprocket with the sprocket and to stabilize the winding of the chain.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for replacing a bucket and a chain of a continuous unloader according to the present invention will be described below with reference to the drawings. First, the structure of the continuous unloader of this embodiment will be described. The basic schematic configuration of this machine is similar to the conventional one, and as shown in FIG. 1 or FIG. 4, a traveling frame 2 movable along the quay 1 by two rails 1 a laid parallel to the quay 1. A swivel frame 3 is rotatably supported on the bucket frame 3, and a bucket elevator 5 is supported on the tip of a boom 4 projecting laterally from the swivel frame 3. The bucket elevator 5 of the present embodiment is configured to hold the boom 4 vertically by the balancing lever 6 and the counterweight 7 regardless of the hoisting angle of the boom 4. In the figure, 14 is a cylinder for adjusting the hoisting angle of the boom 4. When the cylinder 14 is extended, the boom 4 is directed upward, the bucket elevator 5 rises, and when the cylinder 14 is contracted, the boom 4 is extended. Is oriented downward and the bucket elevator 5 is lowered.

Further, in the bucket elevator 5, a chain bucket constituted by attaching a plurality of buckets 9 to an endlessly connected chain 12 in a column member 8 constituting an elevator shaft 8a moves in the arrow direction. Although a plurality of sprockets are arranged so as to orbit around a predetermined locus, the upper sprocket 1 provided on the uppermost part 5a of the bucket elevator 5 is here for convenience of description.
0a, the lower front sprocket 10b in front of the side excavation scraping part 11 (left method in FIG. 1) and the rear of the scraping part 11 (right side in FIG. 1) provided in the lower part of the bucket elevator 5. Only the lower rear sprocket 10c of FIG. Thereby, the chain 12 and the bucket 9
Circulates between the upper sprocket 10a of the uppermost portion 5a of the bucket elevator 5 and the scraping portion 11 while moving around in the arrow direction. The cylinder 1 is placed between the lower front sprocket 10b and the lower rear sprocket 10c.
3, the cylinder 13 is expanded and contracted to change the distance between the axes of the sprockets 10b and 10c, thereby changing the moving orbit of the chain 12 and the bucket 9.

As shown in FIG. 2, each bucket 9 is mounted so as to be suspended between two chains 12, and specifically, two types of links 21a constituting each chain 12 are formed. , 21b are connected to each other, and two types of left and right brackets 24 (not shown) are extended from the inner protruding end 23a of the pin 23 to which the roller 22 is fitted, and the shaped steel is provided outside the bucket 9. Connection part 2
5 and the left and right brackets 24 are connected and fixed by connecting tools 26 such as bolts and nuts. Therefore, in order to replace only the bucket 9, it is sufficient to remove only the left and right connecting members 26, but in order to replace the chain 12 itself, at least one pin 2 of the left and right chains 12 is replaced.
It is necessary to remove 3.

Further, at the uppermost portion 5a of the bucket elevator 5, a chain 12 is turned around from the upper sprocket 10a to a downward direction, and an opening portion of the bucket 9 attached to the chain 12 is turned downward. However, when it is further moved downward as it is, a discharge chute (not shown) is formed at a position vertically opposed to the downward opening, and the lower end opening of this discharge chute is the uppermost part of the bucket elevator 5. It faces the rotary feeder 14 arranged on the outer periphery of the upper portion 5a. The rotary feeder 14 conveys the load carried out from the discharging chute to the boom 4 side. Further, a boom conveyor 15 is arranged on the boom 4, and the boom conveyor 15 can supply a load to the hopper 16. Below the hopper 16 is a belt feeder 1 in the machine.
7 and an in-machine conveyor 18 are arranged.

In the continuous unloader having the above structure,
The scraping part 11 at the lower end of the bucket elevator 5 is inserted into the hold 20 and the chain 12 is moved in a predetermined direction indicated by an arrow to orbit the scraping part 11.
The bucket 9 which is located at and is moved to excavate and scrape the bulk cargo M such as coke and ore one after another. Then, the load M scraped off by these buckets 9 is vertically conveyed to the uppermost portion 5a of the bucket elevator 5 as the chain 12 rises, and then the buckets 9 turn around to fall from the buckets 9. . The dropped load M falls into the carry-out chute and is carried out to the rotary feeder 14 side, and is transferred to the boom conveyor 15 to be transferred to the hopper 16
To the ground-side facility 19 via the belt feeder 17 and the in-machine conveyor 18. By repeating this for each of the buckets 9, the cargo M in the hold 20 is continuously unloaded.

Next, it is necessary to replace the bucket and the chain of the bucket elevator for the reason described above. In this embodiment, the method for collectively replacing the bucket and the chain is as follows.
This will be described with reference to FIGS. 3 and 4. Of these, FIG. 3 shows sprockets 10a, 10 in the bucket elevator 5 for explaining the bucket and chain replacement method.
b, 10c, the chain 12, the bucket 9, etc. are simplified, and in particular, the bucket 9 attached to the chain 12 to be replaced is shaded. Also, the new chain is referred to as chain 12N. Note that FIG. 4 is an overall plan view of the continuous unloader.

First, as shown in FIG. 3a, a new chain 12N at both ends to which a bucket 9 corresponding to the entire circulating length of the bucket elevator 5 is attached is not connected.
On the quay 1 along the movable direction of the entire bucket elevator, specifically the laying direction of the rail 1a as shown in FIG. 4, that is, the turning frame 3 including the bucket elevator 5 and the running direction of the running frame 2. Arrange in series. At this time, the new chain 12N is arranged in a predetermined state, so that each bucket 9 is on the upper side in FIG. 3a so that it can be easily wound up on a sprocket group described later. Although not limited to this, at least by the time of winding a new chain 12N described later,
The moving orbiting direction of the chain 12 in the bucket elevator 5, the direction of arrow a in FIG.
It is necessary to set the direction and position of the bucket elevator 5 so that the arrangement direction of N is aligned. In this embodiment, when the bucket elevator 5 is arranged with respect to the new chain 12N (for example, on the left side of the drawing) as shown in FIG. 3a, the end of the new chain 12N on the opposite side of the bucket elevator 5 is arranged. (The left end in the figure) 12
Nb is fixed to the quay 1.

Next, in this state, by pulling out the pin 23, for example, by pulling out the pin 23 at one place of the chain 12 indicated by point b in FIG. 3a, as shown in FIG. 3b, the bucket elevator 5
The chain 12 in the inside is divided, and subsequently, as shown in FIG. 3c, one end (the left end in the figure) 12a of the chain 12 in the divided bucket elevator 5 is fixed to the quay 1 and the other end (see FIG. The right end) 12b, and the new chain 12N open end (left end in the figure) 12N
The pin 23 is connected to a by inserting it. In addition, in accordance with this, a new chain 12 described later
In preparation for N winding, the lower rear sprocket 10
For example, a pressing roller 27 is attached to c via an arm 30 attached to its rotary shaft so as to press the chain 12 (or a new chain 12N) meshing with the lower rear sprocket 10c.

Then, a new chain 1 on the quay 1
By moving the traveling frame 2 in the arrangement direction of 2N, that is, in the laying direction of the rail 1a, the bucket elevator 5 is moved in the direction of arrow A in FIGS. 3c and 4, and, for example, each sprocket 10b in the bucket elevator 5 concerned. , 10c, etc. are rotated in the arrow direction at a peripheral speed equivalent to the moving speed of the bucket elevator,
The chain 12 in the bucket elevator 5 is moved in the revolving direction, that is, the direction of the arrow in FIG.
The new chain 12N above is wound around each sprocket group in the bucket elevator 5. At this time, the pressing roller 27 presses the new chain 12N onto the sprocket on the take-up side, that is, the lower rear sprocket 10c, whereby the new chain 12N smoothly meshes with the lower rear sprocket 10c, The winding of the new chain 12N is smoothly performed. In addition, the chain 12 mounted in the bucket elevator 5 is accompanied by the winding of a new chain 12N,
It is paid out one after another on the quay 1.

In this way, the new chain 12N arranged on the quay 1 as shown in FIG. 3d is wound into the bucket elevator 5 and the bucket elevator 5
When the chain 12 attached to the is unwound, the connecting portion between the right end 12b of the unwound chain 12 and the left end 12Na of the newly wound chain 12N,
For example, the new chain 12 fixed to the quay 1 while being divided by pulling out the pin 23 or the like.
The right end portion 12Nb of N is removed from the quay wall, and both ends of the new chain 12N wound in the bucket elevator 5 as shown in FIG. Connect by inserting.

Therefore, in the method of replacing the buckets and chains of the continuous unloader of this embodiment, all the buckets and chains can be replaced in series and collectively, so that it takes at least several days to replace the buckets and chains. The time required for (1) is significantly shortened to about several hours, and the cost for replacement work can be reduced accordingly, and the stop time of the continuous unloader can be shortened to reduce loss.

[0023]

As described above, according to the bucket and chain replacing method of the continuous unloader of the present invention, all the buckets and chains in the bucket elevator can be replaced collectively and continuously. The time required for the work can be significantly shortened and the cost can be significantly reduced, and the recovery of the cargo handling work can be speeded up by the reduction in the stop time of the continuous unloader, and the loss such as the payment of the deferred ship cost can be significantly reduced. It can be reduced. Further, as in the conventional case, the reusable bucket can be reused at the next replacement work. Further, by pressing the chain wound around the sprocket during the replacement work with the pressing roller, the bucket and the chain can be stably replaced by the winding.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a continuous unloader.

FIG. 2 is an explanatory view of a bucket chain mounting structure in the bucket elevator of the continuous unloader of FIG.
(A) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 3 is an explanatory view showing an embodiment of a bucket and chain replacing method of the continuous unloader of the present invention.

4 is an overall plan view for explaining the bucket and chain replacement method of FIG.

[Explanation of symbols]

 1 is a quay 2 is a traveling frame 3 is a swing frame 4 is a boom 5 is a bucket elevator 6 is a balancing lever 7 is a counterweight 8 is a column member 9 is a bucket 10a, 10b, 10c is a sprocket 11 is a scraping portion 12 is a chain 13 Cylinder 14 is cylinder 15 is boom conveyor 16 is hopper 17 is belt feeder 18 is in-machine conveyor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Fujita 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (no address) Inside the Mizushima Works, Kawasaki Steel Co., Ltd. (72) Tomoki Ishikawa 1-shima-shima Kawasaki, Kurashiki-shi, Okayama Prefecture Chome (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Hiroaki Ishikawa 1, Mizushima Kawasaki Street, Kurashiki City, Okayama Prefecture (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Kanehiro Okayama 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Japan (No.) Mizushima Works, Kawasaki Steel Co., Ltd. (72) Masamichi Ogami 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama (72, Mizushima Works, Kawasaki) ) Inventor Kazuo Hosomi 1-chome, Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture (without street number) Kawasaki Steel Works, Ltd. Mizushima Works (72) Invention Person Takumi Hayashioka 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (No house number) Kawatetsu Logistics Co., Ltd. Mizushima Branch (72) Inventor Toru Odagami 1-chome, Mizushima-Kawasaki-dori Street, Kurashiki-shi, Okayama Prefecture (No house number) Kawatetsu Logistics Co., Ltd. Mizushima branch office

Claims (2)

[Claims] 1. A bucket elevator in which a chain to which a bucket is attached moves in series along a plurality of sprockets and revolves, and a scraping unit provided below the scraper scrapes a load in the hold into each bucket. Take and transport vertically,
And a bucket and chain replacement method of a continuous unloader capable of moving the entire bucket elevator on the quay, and having a length corresponding to the entire circulating length of the bucket elevator and having both ends of the bucket previously attached. The unconnected chains are arranged in a series extending on the quay along the movable direction of the entire bucket elevator, a part of the chain attached to the bucket elevator is divided, and then the divided part is divided. While fixing one end of the chain to the quay and connecting the other end of the divided chain to one end of the chain extendedly arranged on the quay,
The bucket elevator is moved in the arrangement direction of the chain on the quay and the chain of the bucket elevator is moved in the circling direction to wind the chain on the quay into the bucket elevator, and the chain on the quay is the bucket elevator. After the chain that has been wound inside and attached to the bucket elevator has been paid out, the connecting portions of the two chains are split, and both ends of the chain that is wound into the bucket elevator are connected. Bucket and chain replacement method for continuous unloader. 2. When the chain arranged on the quay is wound up, the chain wound around the sprocket on the winding side is pressed by a roller for presser. Bucket and chain replacement method for continuous unloader.