JP3845990B2 - Bucket wheel unloader - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bucket wheel type unloader, and more particularly to a bucket wheel type unloader for carrying out a granular load such as grain, coal, and steel stone loaded onboard a ship.
[0002]
[Prior art]
A bucket wheel type unloader rotates a bucket wheel formed by arranging a plurality of buckets in an annular shape, for example, scrapes a load stored in a ship and fins the scraped load from within each bucket. It is a device that is transferred to the attached conveyor sequentially by dropping and discharging to the outside of the ship.
[0003]
By the way, when the ship's rocking is large and the bucket wheel is rotated as described above to handle the bottom of the load, the tip of the bucket collides with the ship's bottom each time the ship rocks. Or the bottom of the ship and even the boom.
Therefore, in the conventional bucket wheel type unloader, a relief hydraulic pressure valve is provided on the swing hydraulic cylinder that swings the vertical boom and the hoisting hydraulic cylinder that moves the horizontal boom up and down, and excessive external force is applied to each boom. When activated, the hydraulic oil is released through the relief valve, thereby preventing the boom from being damaged.
[0004]
[Problems to be solved by the invention]
However, in the conventional bucket wheel type unloader, even if the bucket collides with the bottom of the ship due to the swing of the ship, the swing of the ship does not exert an external force on the boom having a large mass or occurs continuously in a short period of time. In this case, since the hydraulic cylinder does not follow, there arises a problem that the tip of the bucket or the bottom of the ship is hardly effective.
[0005]
This invention is made | formed in view of such a situation, and it aims at providing the bucket wheel type unloader which relieve | moderates the collision with a bucket and a ship bottom and prevents damage to the front-end | tip of a bucket or a ship bottom.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a feeder for rotating a bucket wheel in which a plurality of buckets are annularly arranged outside the foil to scrape the granular load, and scraping by the feeder. In the bucket wheel type unloader comprising transport means for transporting the loaded material, a support member that swingably supports the bucket on the foil, and provided on the bucket and engaged with the inside of the foil, the bucket is An engagement member that prevents the outer member from swinging more than a predetermined amount outwardly, and a retraction for retracting the bucket from the outside to the inside of the foil when an external force is applied to the bucket from the outside to the inside of the foil. A storage space is provided between the road and the inside of the foil in a ring shape, and is capable of storing the bucket between the lower portion of the foil and the upper portion of the foil. Characterized in that it comprises a, and an inner guide member forming a guide path for imparting reciprocating force from the inside to the outside of the wheel to the bucket to guide the engaging member between.
[0008]
According to the present invention, for example, when unloading a load loaded on a ship, when the ship swings and an external force from the bottom of the ship is applied to the bucket, the bucket moves from the outside of the foil to the inside, so The collision between the bucket and the ship bottom can be mitigated, and damage to the bucket tip and the ship bottom can be prevented. Further, the retracted bucket is returned to the original position by the return means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of a bucket wheel type unloader according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an overall configuration diagram of a bucket wheel type unloader according to the present invention. As shown in the figure, the bucket wheel type unloader 10 mainly comprises a traveling frame 12, a turning frame 14, a horizontal boom 16, a vertical boom 18, a feeder 20, a fin conveyor 22, and a hoisting hydraulic cylinder 24. Is done.
[0010]
The travel frame 12 serves as a base portion of the bucket wheel unloader 10 and includes wheels 26, 26,... At the lower end, and drives a drive motor (not shown) connected to the wheels 26, 26,. The wheel type unloader 10 is moved (running).
The turning frame 14 is provided above the traveling frame 12 and performs a turning operation by driving a rotating means (not shown).
[0011]
The horizontal boom 16 is supported by an upper end portion of the revolving frame 14 so as to be swingable in the vertical direction, and performs a hoisting operation by driving a hydraulic cylinder 24 connected in the vicinity of the support portion.
The vertical boom 18 is supported by a tip end portion of the horizontal boom 16 so as to be swingable in the lateral direction, and swings (swings) by driving a hydraulic cylinder 24 connected to the upper end portion.
[0012]
The feeder 20 is provided at the tip of the vertical boom 18 and rotates a bucket wheel 32 that is rotatably supported, so that a granular load 28 such as coal or iron ore stored in the ship 30 is provided. Perform scraping operation.
The scraped load 28 is transferred to the fin conveyor 22 provided on the vertical boom 18 and the horizontal boom 16, and is carried out of the ship 30 by the fin conveyor 18.
[0013]
In the bucket wheel type unloader 10 configured as described above, all drive control of the operation is performed in a control room provided in the revolving frame 14, and the feeder 20 includes the revolving frame 14, the horizontal boom 16 and the vertical boom 18. A three-dimensional movement is possible by a combination of operations such as turning, undulation and swinging.
2 and 3 are a front sectional view and a side sectional view of the feeder 20 according to the present invention.
[0014]
As shown in these drawings, the feeder 20 mainly includes a bucket wheel 32 provided with a plurality of buckets 36 on the outside of the wheel 40 and rotating to scrape the load 28, and the bucket wheel 32 as a bearing 41. And an annular inner guide member 38 fixed to the vertical boom 18.
[0015]
The bucket 36 has a substantially fan-shaped cross section, and forms an opening 36c for scraping the load 28 by the integrally formed bottom plate portion 36a, a pair of side plate portions 36b, and an upper plate portion 36d. Then, the bottom plate portion 36a side of the upper plate portion 36d is swingably supported by the connecting portion of the foil 40 via the pin 50, and a pair of rollers 52 rotate at both ends of the upper plate portion 36d on the opening portion 36c side. It is supported freely. On the other hand, a plurality of openings 40a are formed on the outer periphery of the foil 40 in accordance with the shape and number of buckets, and the roller 52 is engaged with the inside of the foil 40 so as to face the opening 40a. That is, the opening 40a is formed in such a size that the buckets 36 pass but the rollers 52 provided on both outer sides of the buckets 36 cannot pass. As a result, the bucket 36 can swing from the outside to the inside (direction A in FIG. 2) of the wheel 40, which is a scraping position for scraping the load 28, but from the scraping position to the outside (FIG. 2 in the B direction).
[0016]
The inner guide member 38 is a guide member that guides the roller 52 when the bucket 36 is housed in the foil 40. The upper half is circular with respect to the rotation center of the bucket wheel 32, and the lower half is substantially elliptical. ing.
Since the upper half of the inner guide member 38 has a circular shape, a passage through which the roller 52 rotates together with the foil 40 is secured between the circular portion of the inner guide member 38 and the foil 40. Forms a gap so that the roller 52 does not rotate around the pin 50. Therefore, when the roller 52 rotates above the rotation center of the bucket wheel 32, the bucket 36 rotates with the foil 40 while being fixed at the scraping position.
[0017]
Further, since the lower half of the inner guide member 38 is substantially elliptical, there is a space in which the roller 52 can rotate around the pin 50 between the elliptical portion of the inner guide member 38 and the foil 40. Therefore, when the roller 52 is moving at a position lower than the rotation center of the bucket wheel 32, the bucket 36 can swing within the range in which the roller 52 can rotate about the pin 50, and rotates with the foil 40 in this state. To do.
[0018]
A chute 46 is provided in the upper portion of the inner guide member 38, and the load 28 that sequentially falls from the rotating bucket 36 is guided by the chute 46 and transferred to the finned conveyor 22. A hole 48 is provided in a lower portion of the inner guide member 38, and the load 28 spilled from the finned conveyor 22 passes through the hole 48 and is removed from the inner guide member 38 and collected in the foil 40. Moreover, the hole 40b is provided in the foil 40 between the opening 40a and the opening 40a, and the load 28 accumulated in the foil 40 passes through the hole 40b and is discharged out of the foil 40.
[0019]
Next, the operation of the embodiment of the bucket wheel type unloader according to the present invention configured as described above will be described.
FIG. 4 is a cross-sectional view of the feeder 20 that scrapes off the load 28 when the ship 30 is not pushed up by swinging. 5 and 6 are a front sectional view and a side sectional view showing the main part of FIG.
[0020]
The load 28 loaded on the ship 30 is sequentially scraped by the buckets 36, 36,... By rotating the bucket wheel 32 in the direction of arrow 34 and moving the bucket wheel 32 forward in the direction of arrow 35. To go. Then, the load 28 scraped off by the bucket 36 is conveyed upward by the rotation of the bucket wheel 32 and is released from the bucket 36 and dropped and discharged when the bucket 28 is conveyed above the chute 46. The load 28 dropped and discharged is guided by the chute 46 and transferred to the fin conveyor 22, and is sequentially transported out of the ship 30 by the fin conveyor 22. The load 28 spilled from the fin conveyor 22 falls out of the bucket wheel 32 through the holes 48 and 40b and is scraped again by the buckets 36, 36,.
[0021]
In the above-described scraping of the load 28, the bucket 36 when the ship 30 is not pushed up due to the swing of the ship 30 has the weight of the bucket 36 and the rotation of the bucket wheel 32 when the roller 52 is below the rotation center of the bucket wheel 32. Due to the centrifugal force, the roller 52 is engaged with the inside of the foil 40 and maintained in the scraping position. Even when the roller 52 is above the rotation center of the bucket wheel 32, the bucket wheel 32 rotates while being fixed at the scraping position because it is in the scraping position as described above.
[0022]
FIG. 7 is a cross-sectional view of the feeder 20 that scrapes off the load 28 when pushed up by the swing of the ship 30. 8 and 9 are a front sectional view and a side sectional view of the main part of FIG.
When the ship 30 swings and the bottom 30a moves up and down and performs a rough cargo handling, the tip of the bucket 36 is pushed up to the ship bottom 30a every time the ship swings. When pushed up to the ship bottom 30 a, the bucket 36 swings in the direction of arrow A in FIG. 7 and is stored in the gap between the wheel 40 and the inner guide member 38. Therefore, no great pressure is applied to the tip of the bucket 36. When the bucket wheel 32 rotates in the direction of the arrow 34, the stored bucket 36 is guided by the substantially elliptical portion of the inner guide member 38 and gradually driven out of the foil 40, and the inner guide When the roller 52 reaches the circular portion of the member 38, the bucket 36 returns to the scraping position. The bucket 36 that has returned to the scraping position rotates in the scraping position, and performs the scraping operation of the load 28 again.
[0023]
Thus, in the embodiment according to the present invention, when the ship 30 swings and an external force is applied to the bucket 36, the bucket 36 rotates around the pin 50, and the bucket 36 is stored in the inner space of the wheel 40. Is done. Further, the avoided bucket 36 can be guided by the inner guide member 38 and returned to the scraping position. Therefore, the collision with the ship bottom can be mitigated without affecting the supply capacity of the load 28.
[0024]
In the above-described embodiment, the installation position of the pin 50 is on the bottom plate portion 36a side of the upper plate portion 36d of the bucket, and the installation position of the pair of rollers 52 is on the opening 36c side of the upper plate portion 36d. However, the present invention is not limited to this. For example, the pin 50 may be provided on the opening 36c side of the upper plate portion 36d, and the roller 52 may be installed on the bottom plate portion 36a of the upper plate portion 36d.
[0025]
In the above-described embodiment, the inner guide member 38 has a circular shape in the upper half and a substantially oval shape in the lower half. However, the shape is not limited to this, and the bucket 36 is moved when the ship 30 swings. Any shape may be used as long as a space for storing the bucket 36 is secured and the bucket 36 can be smoothly returned to the scraping position via the roller 52.
In the embodiment described above, the pin 50 is used as means for supporting the bucket 36 on the foil 40, and the roller 52 and the inner guide member 38 are used as means for returning the bucket 36 to the scraping position. It is not a thing. For example, the bucket 36 may be supported from the inside of the wheel 40 by a hydraulic cylinder, an elastic body or the like so as to have the return means.
[0026]
【The invention's effect】
As described above, according to the bucket wheel type unloader according to the present invention, for example, when unloading a load loaded on a ship, when the ship swings and an external force is applied to the bucket, the bucket Since it can be stored in the foil and the collision with the bottom of the ship can be mitigated, breakage of the bucket and the bottom of the ship can be prevented.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a bucket wheel type unloader according to the present invention. FIG. 2 is a front sectional view of a feeder according to the present invention. FIG. 3 is a side sectional view of a feeder according to the present invention. FIG. 5 is a front sectional view of the main part of FIG. 4 when there is no push-up due to rocking. FIG. 6 is a front sectional view of the main part of FIG. FIG. 8 is a front cross-sectional view of the main part of FIG. 7 when there is push-up due to swinging. FIG. 8 is a front cross-sectional view of the main part of FIG.
20 ... feeder 32 ... bucket foil 36 ... bucket 38 ... inner guide member 40 ... foil 50 ... pin 52 ... roller

Claims (1)

  A bucket comprising: a feeder having a plurality of buckets arranged annularly on the outside of the foil, and rotating the bucket wheel to scrape the granular load; and a conveying means for conveying the load scraped by the feeder In the wheel type unloader, a support member that swingably supports the bucket on the foil, and the bucket is provided on the bucket and engaged with the inside of the foil to prevent the bucket from swinging outward more than a predetermined amount. An engaging member formed on the foil, and a retreat path for retracting the bucket from the outside to the inside of the foil when an external force is applied to the bucket from the outside to the inside of the foil. A storage space capable of storing the bucket between the lower portion of the foil and the front of the engagement member by guiding the engaging member between the upper portion of the foil and Bucket wheel unloader characterized in that it comprises an inner guide member forming a guide path for imparting reciprocating force from the inside to the outside of the foil to the bucket, the.

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