JPH09267924A - Adhered object removal method of continuous unloader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhered object removal method of a continuous unloader by which an object adhered on a conveyance passage can be removed without wetting a bucket. SOLUTION: This unloader is constituted in such a manner that many buckets 9 attached to a chain which turns vertically scrape out cargoes in a hold 30a sequentially by a scraping out part provided in a lower section thereof and rise, vertically and that it is provided with a bucket elevator 5 which rotates in an upper section to drop a cargo in the bucket 9. In this case, a lumplike raw material is scraped out by the bucket 9 positioned in the scraping out part 11 one after another, and the lumplike raw material which is scraped out is conveyed along a conveyance passage constituted by a boom conveyor 15 in the unloader to peel and remove an adhered object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket elevator type continuous unloader provided with a bucket elevator having a plurality of buckets attached to a chain that circulates along an elevator shaft, and a transfer path of the continuous unloader. The present invention relates to a method for removing deposits of a continuous unloader that removes deposits attached to the like.

[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 bucket elevator is supported by a tip end portion of a boom extending from the swing frame. There is. In this bucket elevator, a large number of buckets are attached to a chain that circulates endlessly inside an elevator shaft, and a parallel link is formed by a boom that supports the bucket elevator at the tip and a balancing lever, so that the boom is raised and lowered. Regardless of angle
The axis of the elevator shaft is always oriented vertically.

When the scraping portion of the bucket elevator is inserted into the hold and the unloader is operated, each bucket sequentially scrapes bulk cargo such as coal and ore in the hold and follows the elevator shaft. Move vertically upwards and turn at the top of the elevator to descend on the opposite side. By turning this bucket, the load in the bucket is
It is discharged to the rotary feeder arranged on the outer periphery of the uppermost part of the elevator via the discharge chute provided on the bucket lowering side of the uppermost part of the elevator. The rotary feeder continuously receives the load dropped from the discharge chute and sends it to the boom conveyor (belt conveyor arranged in the boom). The load dropped on the boom conveyor is carried by the boom conveyor to the chute portion of the revolving frame, and is directly carried out by the chute portion or by transiting the in-machine conveyor to the ground side equipment.

In this way, the cargo in the hold is continuously unloaded, but if the cargo conveyed at this time is granular and contains fine powder or is likely to generate fine powder. However, there is a problem that fine powder easily adheres to the boom conveyor or the in-machine conveyor, and the fine powder adhered is mixed when another load is conveyed.

Further, when the amount of the deposits adhering to the inside of the bucket elevator or the boom conveyor increases, there is a problem that the operation cannot be performed because the load supported by actuators such as cylinders supporting the bucket elevator and the boom is exceeded. .

In order to prevent this, conventionally, as described in, for example, Japanese Unexamined Patent Publication (Kokai) No. 5-43042, when the amount of adhered substances exceeds a predetermined amount, the transfer route in the unloader is washed with water. A method of removing the kimono has been proposed.

[0007]

However, in the conventional method of removing the deposits by washing with water as described above, the deposits on the portion washed with water are removed, but the deposits on the portion not directly washed with water cannot be removed.

Further, when the bucket or the like is washed with water, the bucket or the like is in a wet state, and if the unloading work is restarted as it is, an unacceptable deposit adheres to the bucket or the like early, for example, for about 20 minutes. Rewashing is required in a short period of time. That is, there is a problem that the cleaning interval for removing the deposits is short and the continuous unloading time by the unloader is short.

The present invention has been made in view of such a problem, and is a method for removing deposits of a continuous unloader capable of removing deposits adhering to the transfer path of the unloader without wetting the bucket or the like. The challenge is to provide.

[0010]

In order to solve the above-mentioned problems, the method of removing deposits of a continuous unloader according to claim 1 of the present invention includes a large number of chains attached to a chain that circulates along an elevator shaft. The bucket is equipped with a bucket elevator that sequentially scrapes the load in the unloading side equipment by the scraping unit provided at the lower part to vertically rise, and turns at the upper part to drop the load in the bucket,
Between the discharge path such as a chute that conveys the load dropped from the turned bucket to the boom side, the boom conveyor arranged along the boom that supports the bucket elevator at the tip, and between the boom conveyor and the equipment on the loading side. In a method for removing deposits of a bucket elevator type continuous unloader equipped with a transfer means provided, coarse solids are scraped off by a bucket located at the scraping section, and the scraped coarse solids are transferred in the unloader. The feature is that it is transported along a route.

Here, the above-mentioned coarse solid matter means, for example, a solid matter having a particle size of 20 mm or more and having a predetermined hardness, and it is desirable that the outer surface has a corner. According to the present invention, when coarse solid matter is excavated by a bucket and scraped off, the impact at the time of excavation is transmitted to the bucket elevator and further to the boom conveyor side through the bucket, and the impact causes the chain bucket and the bucket. The adhered matter that has adhered to the inside of the column member of the elevator peels off. This is because when excavating and scraping coarse solids such as massive ores, the excavation resistance is large, and the impact during scraping / unloading is large. Further, since the scraping is continuously performed, the impact is continuously input, and strong vibration is input to the unloader, particularly the bucket elevator and the boom, and the adhered matter is also peeled off by this vibration.

Further, while the coarse solid matter is being conveyed through the conveying path in the unloader, the adherent matter in the bucket or the conveyor rubs against the coarse solid matter, so that the adherent matter is peeled off.

The above-mentioned peeled deposit is carried out along the transport path or dropped from the unloader. next,
In the invention described in claim 2, in contrast to the configuration described in claim 1, when a predetermined amount or more of the adhered matter adheres in the continuous unloader, the massive raw material in the unloading side equipment is treated as coarse solid matter. Characterized by unloading.

As the lump raw material as the above-mentioned coarse solid matter, for example, a straightening ore having a size of about 30 mm or more or 200 to 300 is used.
It is desirable to have a cut ore of about mm and be dry and non-adhesive.

According to the present invention, the lumped raw material is unloaded before depositing a predetermined amount or more of the adhering substances and thus hindering the current unloading work. The work of removing the deposits is performed.

Next, in the invention described in claim 3, in addition to the structure described in claim 1 or claim 2, the coarse solids scraped by the bucket and transported along the transport path in the unloader. It is characterized in that the substances are carried out to a position where they can be unloaded by the continuous unloader or another continuous unloader, piled up, and used as a coarse solid substance for removing deposits.

According to the present invention, since the coarse solid matter is carried out and piled up at a position where it can be unloaded by the continuous unloader or another continuous unloader, the coarse solid matter that has been piled up can be removed at any time to remove deposits. It becomes possible to carry out the unloading work of the solid matter.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. First, the configuration of the continuous unloader will be described. The basic structure of this machine is the same as the conventional one, and as shown in FIG. 1, a swing frame 3 is swingably supported on a traveling frame 2 movable along the quay 1, and a boom 4 extending from the swing frame 3 is provided. A bucket elevator 5 is supported at the tip of the. This bucket elevator 5
The balancing lever 6 keeps the boom 4 vertical regardless of the hoisting angle. In the figure,
Reference numeral 7 is a counter weight for balancing with the bucket elevator 5. Further, reference numeral 71 is
The hoisting cylinder is interposed between the swivel frame 3 and the balancing lever 6, and expands and contracts according to the hoisting angle of the boom 4.

Further, as shown in FIGS. 1 and 2, the bucket elevator 5 has a large number of buckets 9 attached to a chain which is endlessly circulated along a cylindrical column member 8 constituting an elevator shaft. The chain bucket 31 is provided. These buckets 9 are circulated between the upper sprocket 10 provided on the uppermost portion 5a of the elevator and the scraping portion 11 provided on the lower end by driving the chain. 1 and 2, a side excavation type scraping portion structure is illustrated as the scraping portion 11.

A discharge chute 12 extending in the vertical direction is formed in the uppermost portion 5a of the elevator at a position vertically opposed to the downward opening of the bucket 9 when the bucket 9 rolls and moves downward. ing. The discharge chute 12 rotates integrally with the column member 8 about its vertical axis. Further, the lower end opening of the discharge chute 12 faces the rotary feeder 14 arranged on the outer periphery of the upper portion of the column member 8.

The rotary feeder 14 rotates independently of the column member 8 about the axis of the column member 8, receives the load conveyed from the discharge chute 12, and conveys the received load to the boom 4 side. It is a thing. A boom conveyor 15 is arranged along the extending direction of the boom 4, and the load conveyed by the rotary feeder 14 is provided on the side of the rotary feeder 14 above the boom conveyor 15. There is a drop port 22 for dropping.

The upper opening of the drop port 22 is arranged below the rotary feeder 14 and outside the outer periphery thereof, and is arranged above the rotary feeder 14 from the inner periphery thereof.
The load conveyed by the rotary feeder 14 is guided to the drop port 22 by the scraper reaching above.

The drop port 22 and the scraper are fixed to the main body having the outer peripheral wall of the rotary feeder 14 and the like.
It is independent of the rotation of the column member 8. Further, the scraper is arranged between the lower end of the discharge chute 12 and the upper end of the rotary feeder 14, and the drop port 22 is also arranged below the rotary feeder 14, both of which rotate the discharge chute 12 and rotate the rotary feeder 14. It does not interfere with any of the rotation.

A hopper 16 is arranged below the downstream end of the boom conveyor 15, and an in-machine belt feeder 17 and an in-machine conveyor 18 are arranged below the hopper 16, and the downstream end of the in-machine conveyor 18 is It is arranged at the carry-in entrance of the above-ground equipment 19 which is the carry-in side equipment. here,
The hopper 16, the in-machine belt feeder 17, the in-machine conveyor 18 and the like constitute a conveying means.

The boom conveyor 1 in the boom 4 is
Below the hopper 5, the hopper 1 collects the fine powder of the conveyed product falling from the boom conveyor 15 and collects the fine powder received.
An auxiliary conveyor for guiding to No. 6 is installed. Also,
Below the in-machine conveyor 18, below the in-machine belt feeder 17
An auxiliary conveyor 18a extending from the upstream end to the downstream end of the in-machine conveyor 18 is installed. The auxiliary conveyor 18a receives fine particles of a conveyed product falling from them and collects them to guide them to the carry-in entrance of the above-ground equipment 19.

The ground-side equipment 19 is composed of a belt conveyor or the like, and as shown in FIG.
The receiving conveyor 21 extends in parallel with 0, and the receiving conveyor 21 is connected with a yard conveyor 22 that conveys a load to a processing yard (not shown).

Further, in the present embodiment, another second yard conveyor 23 is connected in the middle of the yard conveyor 22, and the second yard conveyor 23 is laid in parallel with the receiving conveyor 21 so that the adhered matter The load can be transported to the rear yard 24 of the raw material for removal. The rear yard 24 is set at a position where the bucket elevator 5 can unload by rotating the boom 4 of the continuous unloader. Further, 25 indicates a stacker.

In such a continuous unloader, the scraping part 11 at the lower end of the bucket elevator 5 is inserted into the hold 30a and the bucket 9 located at the scraping part 11 is inserted.
Then, excavation and scraping of bulk cargo such as coke and coal. The load scraped by the bucket 9 is
Is vertically conveyed to the uppermost portion 5a of the elevator, and the bucket 9 turns to fall from the inside of the bucket. The dropped load is discharged to the rotary feeder 14 through the discharge chute 12.

Further, the load is conveyed from the boom conveyor 15 to the hopper 16, and is conveyed to the above-ground equipment 19 via the in-machine belt feeder 17 and the in-machine conveyor 18. As described above, the cargo in the hold 30a is continuously unloaded.

When it is detected that the deposits on the conveying paths such as the bucket 9 and the boom conveyor 15 and the inner wall of the column member 8 of the bucket elevator 5 increase due to the above-mentioned unloading work, and the deposits grow beyond an allowable level. , Remove adhered substances.

The detection of the growth of the adhering matter beyond the allowable range can be carried out by, for example, issuing an alarm when the load applied to the undulating cylinder 71 becomes close to the allowable range.

In the work of removing the deposits, first, the current unloading of the load is temporarily stopped, the unloader is moved, and the scraping section 11 at the lower part of the elevator 5 is lumped ore such as rectified ore, which is a coarse solid substance. Is inserted into the cargo hold 30a in which is loaded.

When the unloader is operated in this state, the bulk load of the massive ore is sequentially excavated and scraped by the bucket 9 located in the scraping section 11. At this time, the excavation resistance applied to the bucket 9 is much larger in the case of massive ores than in the case of scraping powdered ores and the like.
Each time the bucket 9 excavates a massive ore at, a large impact is input to the bucket chain 31, that is, the bucket elevator 5, and this impact is transmitted from the bucket elevator 5 to the boom 4
It is also transmitted to the inner boom conveyor 15. Since the scraping of the load by the bucket 9 is continuously performed, the large impact is continuously transmitted to the bucket elevator 5 and the boom conveyor 15.

Then, due to the large and continuously input shock and the forced vibration resulting therefrom, the adhered matter adhered to the conveying path such as the bucket 9, the discharge chute 12, the rotary feeder 14, the boom conveyor 15 and the like is peeled off. And is carried out along the transportation route. At the same time, the adhered matter that has adhered to the inner wall of the column member 8 of the bucket elevator 5 is also peeled off and dropped.

Further, the load scraped by the bucket 9 is
As the bucket 9 rises, it is vertically transported to the uppermost elevator 5a, and the bucket 9 turns to drop from inside the bucket 9. Dropped chute 12
And is discharged to the rotary feeder 14. The load placed on the rotary feeder 14 is dropped onto the boom conveyor 15 through the drop port 22. Furthermore, this load is the boom conveyor 15
From the hopper 16 to the receiving conveyor 21 which is the ground side equipment 19 via the in-machine belt feeder 17 and the in-machine conveyor 18.

As described above, even while the lumpy raw material is being conveyed, the lumpy raw material is rubbed against the adhered matter adhering to the inside of the bucket 9 or the like to peel off the adhered matter, and the separated adhered matter is conveyed through the conveying route. Be carried along. Here, since there is an impact at the time of scraping even during the transportation, the massive ore rubs against the deposit with a predetermined force.

As described above, the load carried out to the receiving conveyor 21 is sent to the yard conveyor 22 side, moves to the second yard conveyor 23 in the middle of the yard conveyor 22, and is transferred to the rear surface by the second yard conveyor 23. Yard 2
4 to the rear yard 2 by the stacker 25.
Stacked in 4.

Alternatively, the load carried out to the receiving conveyor 21 is sent to the yard conveyor 22 side and carried to a predetermined processing yard. Then, after the above-mentioned unloading is carried out for a predetermined time to remove the deposits, the unloading work of the load before the interruption is carried out again.

As described above, in the deposit removing work of the present embodiment, the deposit removing work can be performed while the lumpy ore is being unloaded. Also, since the deposits are removed without using water, even if the normal unloading work is performed after the deposits are removed, the growth of the deposits is slower than the case where the deposit removal work by washing with water is performed, and the long-term It is possible to carry out continuous unloading work for a long time.

Here, when the raw material in the hold 30a is used for removing deposits as described above, it is necessary to select the hold 30a to be unloaded so as not to lose the balance of the ship 30, so the deposit amount is the upper limit. In some cases, it is not practically possible to unload the lumpy raw material for removing the deposits at an arbitrary timing.

If there is such a limitation, the unloader is moved, the boom 4 is turned, the bucket elevator 5 is moved to the pile 25 of the massive ores piled in the rear yard 24, and the mass of the mountain 25 is changed. The ore may be scraped off and transported along the transport path in the unloader. The conveyed massive ore is carried out to the receiving conveyor 21 which is the ground side equipment 19 via the in-machine conveyor 18, is conveyed to the rear yard 24, and is piled up again. At this time, if there is a risk of interfering with the bucket elevator 5 currently performing unloading work, the lumped lumps after being unloaded to another rear yard separated from the pile of lumpy ore currently being unloading by a predetermined distance. Ore is piled up so that it can be reused.

By doing so, even if the massive ore cannot be unloaded from the hold 30a for removing the extraneous matter, the extraneous matter can be removed by unloading the massive ore in the rear yard 24. Like That is, it becomes possible to perform the work of removing the adhered matter at an arbitrary timing.

Of course, the removal work of the adhered matter is carried out by the rear yard 2.
You may make it use only the massive ore piled up in 4. Here, in the above-described embodiment, an example is shown in which the unloading work is performed by one continuous unloader, but the present invention can be applied even when the unloading work is performed in parallel by two or more continuous unloaders. is there.

As the massive ore as a coarse solid used for the deposit removing work, an ore having a particle size of not less than a predetermined value, for example, 20 mm or more, such as a cut ore or a straightening ore, is adopted.

Further, not the ore raw material, but a steel material having a predetermined particle size is used as a coarse solid for exclusive use to remove deposits.
4 may be piled up, and the steel material may be scraped off and conveyed along the conveyance path in the unloader to remove the adhered substances, and be circulated and used.

When the coarse solid matter is discharged to the rear yard 24, it is preferable that the fine powder is piled up after removing it by sieving so that the fine powder does not recirculate in the unloader.

[0047]

Example When the lump ore was actually used as a coarse solid and the deposits were removed according to the above-mentioned embodiment, the unloading was restarted, and the unloading operation time until reaching 90% of the deposit upper limit was It was about 2 hours. For comparison, when the deposits were removed by washing with water and then the unloading work was performed under the same conditions, the unloading operation time until the deposit amount reached 90% of the upper limit was about 20 minutes.

As described above, it is understood that the method for removing deposits according to the present embodiment can significantly lengthen the continuous operation time for unloading as compared with the conventional method, and improve the unloading efficiency.

[0049]

As described above, in the method of removing deposits of the continuous unloader of the present invention, since water is not used, the growth of redeposition after deposit removal is significantly slower than that of washing with water. For this reason, there is an effect that the interval for performing the deposit removal work becomes long and the continuous unloading work time by the continuous unloader after the deposit removal becomes long.

At this time, if the invention of claim 2 is adopted,
There is an effect that the work of removing the deposit can be performed while unloading. Further, when the invention of claim 3 is adopted, there is an effect that the work of removing the adhered matter can be performed at an arbitrary timing, and the coarse solid matter can be recycled.

[Brief description of drawings]

FIG. 1 is a diagram showing a continuous unloader according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a transport path of the continuous unloader according to the embodiment of the present invention.

FIG. 3 is a diagram for explaining a conveyance path of a load discharged from the continuous unloader according to the embodiment of the present invention.

[Explanation of symbols]

 4 Boom 5 Bucket Elevator 8 Column Member 9 Bucket 11 Scraping Part 12 Discharge Chute 14 Rotary Feeder 15 Boom Conveyor 16 Hopper 18 Inboard Conveyor 21 Receiving Conveyor 22 Yard Conveyor 23 Second Yard Conveyor 24 Rear Yard 25 Massive Ore Mountain 30 Ship 30a Ship Hold

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masamichi Ogami, 1 Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (without street number) Inside the Mizushima Works, Kawasaki Steel Co., Ltd. (72) Kazuo Hosomi, Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture Chome (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works

Claims (3)

[Claims] 1. A large number of buckets attached to a chain that circulates along an elevator shaft sequentially scrapes up the load in the unloading side equipment by a scraping section provided at the lower part and vertically ascends at the upper part. It is equipped with a bucket elevator that turns to drop the load in the bucket, and is arranged along a discharge path such as a chute that conveys the load dropped from the turned bucket to the boom side and a boom that supports the bucket elevator at the tip. In the method of removing deposits of a bucket elevator type continuous unloader equipped with a boom conveyor and a conveying means provided between the boom conveyor and the equipment on the loading side, the bucket located at the scraping section is used to remove coarse solids. A continuous unloader characterized by scraping objects and carrying the scraped coarse solids along the transfer path in the unloader. Deposit removing method of Da. 2. The continuous as set forth in claim 1, wherein when a predetermined amount or more of adhered matter adheres to the continuous unloader, the lumpy raw material in the unloading side equipment is unloaded as coarse solid matter. Method of removing deposits on a unloader. 3. The coarse solid matter scraped off by the bucket and conveyed along a conveyance path in the unloader is carried out to a position where it can be unloaded by the continuous unloader or another continuous unloader, and is piled up. It is used as a coarse solid material for removal, or claim 1 or claim 2.
The method for removing deposits of a continuous unloader described in 1.