JPH08175678A - Bucket wheel type unloader - Google Patents

Abstract

PURPOSE: To provide a bucket wheel type unloader which can improve the transporting ability in the case of transporting articles being bad in fluidity and large in specific gravity. CONSTITUTION: The shape of a chute 38A for transferring a transported article 32 raked by a bucket 42 onto a finned conveyor 34 is set up so that the inclination angle of the chute 38A may be larger than the angle of repose of the transported article 32, and the setting position of the upper end of the chute 38A is set at a position where the transported article 32 is first released from the bucket 42, and the sectional shape of the chute 38A is formed into a curved line swelling in the rotating direction of a bucket wheel 28. The inclination angle of the chute 38A can thereby be made steep in a slope, and the start position of chuting can be set up to be early. Thus even in the case of transporting articles 32 which are bad in fluidity and large in specific gravity, they can be transferred onto the finned conveyor 34 without partially piling up them. In addition, since the number of revolutions of the bucket wheel 28 can be increased, transporting ability can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket wheel type unloader, and more particularly to a bucket wheel type unloader for scraping and transporting an object to be transported which has poor fluidity and large specific gravity.

[0002]

2. Description of the Related Art A bucket wheel type unloader, for example, scrapes an object to be transported stored in a ship by rotating a bucket wheel formed by arranging a plurality of buckets in an annular shape and transports the scraped transported object. Objects are transferred from the inside of each bucket to a finned conveyor and discharged, and then sequentially transferred and carried out of the ship.

In this bucket wheel type unloader, the transfer of the transported object from the bucket to the fin conveyor is carried out via a chute, and the transported objects sequentially scraped by the bucket and conveyed are guided by the chute. Transferred to a finned conveyor. And, conventionally, the chute used for this kind of bucket wheel type unloader is
A flat plate is used.

[0004]

However, the flat plate-shaped chute has a high fluidity and a small specific gravity, and when a transported object is transferred to the fin conveyor, accumulation or fins on the lower part of the chute occurs. Good transfer performance with no bias in the width direction of the attached conveyor. However, when transferring an object to be transported that has poor fluidity such as coal and has a large specific gravity, even if the object to be transported falls and is discharged from the bucket, it is difficult for the object to be dropped and there is a fin. The conveyor is biased to the inner side in the width direction (the side farther from the chute start position).

In order to eliminate such a bias in the transfer of the transported object, it is conceivable to lower (lower) the chute start position of the transported object. It becomes gentle and the inclination angle becomes less than the repose angle of the transported object. As a result,
Transported material accumulates at the bottom of the chute, it grows,
After all, the problem that the shooting start position becomes high arises.

Further, if the rotation speed of the bucket wheel is increased in order to increase the transportation amount of the transported object, the transported object is unevenly loaded on the fin conveyor as described above. Heretofore, in order to solve these problems and increase the transportation capacity of the transported object, it has been possible to deal only with increasing the size of the device and decreasing the rotation speed of the bucket wheel.

The present invention has been made in view of the above circumstances, and is capable of improving the transportability of a transported object when transporting the transported object having poor fluidity and large specific gravity. The purpose is to provide an expression unloader.

[0008]

In order to achieve the above-mentioned object, the present invention rotates a bucket wheel in which a plurality of buckets are annularly arranged to scrape off granular objects to be transported by the bucket, and A feeder that drops and discharges the transported object in the bucket scraped by rotating the bucket wheel from the inside of the bucket through a chute, and the transported object that is dropped and transported is transferred and transferred. A bucket wheel unloader comprising a transport means for transporting the transported object, and the chute has an inclined portion formed so that its inclination angle is equal to or greater than the repose angle of the transported object, and And a convex curved portion connecting an upper end and a chute start position where the transported object is dropped and discharged from the inside of the bucket.

[0009]

According to the present invention, the chute is started so that the tilt angle of the chute is equal to or greater than the repose angle of the transported object, the upper end of the slanted part and the transported object are dropped and discharged. Since it is composed of a convex curved portion that connects the position with the position, even if the inclination angle of the chute is steep (more than the repose angle of the transported object), the starting position of the chute where the transported object drops and is discharged from the bucket is lowered. Can be (lowered).

As a result, when the inclination angle of the chute is made steep, the chute start position becomes high, and the material to be transported is transferred while being biased toward the inner side in the width direction of the conveying means (the side far from the chute position). When the starting position is lowered, the angle of inclination of the chute becomes gentle, and the conventional drawback of being unevenly deposited in the lower part of the chute can be solved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a bucket wheel type unloader according to the present invention will be described below 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 is mainly composed of a traveling frame 12, a revolving frame 14, a horizontal boom 16, a vertical boom 18 and a feeder 20, and the respective constituent members are traveling, revolving, and undulating. , Perform swing and other operations.

The traveling frame 12 serves as a base portion of the bucket wheel type unloader 10, and the wheels 2 are provided at the lower end portion thereof.
.., and drive (running) of the bucket wheel type unloader 10 is performed by driving a drive motor (not shown) connected to the wheels 22, 22 ,. The revolving frame 14 is provided above the traveling frame 12,
Turning is performed by driving a turning means (not shown).

The horizontal boom 16 includes a swing frame 16
The undulation is carried out by driving the undulating means 24 which is supported by the upper end of the and which is provided near the supporting part. The vertical boom 18 is supported by the tip of the horizontal boom 16 and swings (swings) by driving the swinging means 26 connected to the upper end. The feeder 20 is a vertical boom 1
By rotating the bucket wheel 28, which is supported by the tip portion of 8 and has buckets 42, 42, ... Arranged in an annular shape, the transported object 32 stored in the ship 30 is scraped. Then, the transported object 32 scraped off is conveyed from the inside of the buckets 42, 42, ... And by the fin conveyor 34 provided on the vertical boom 18 and the horizontal boom 16 and is carried out to the outside of the ship.

In the bucket wheel type unloader 10 configured as described above, all drive control of its operation is performed in the control room 34 provided in the revolving frame 14, and the feeder 20
Is 3 depending on a combination of the swing frame 14, the horizontal boom 16 and the vertical boom 18 such as swing, undulation and swing motions.
Dimensional movement is possible. 2 is an enlarged side view of the feeder 20 of the bucket wheel type unloader 10 shown in FIG. 1, and FIG. 3 is an enlarged front view of the feeder 20. As shown in FIGS. 2 and 3, the feeder 20 includes a bucket wheel 28 and a chute 38 in a casing 46.
Shoot the transported object scraped off with bucket wheel 28
The sheet is transferred to the fin-equipped conveyor 34 via No. 8 and is sequentially carried out of the ship by the fin-equipped conveyor 34.

The bucket wheel 28 is a bucket 42 having a substantially fan-shaped cross section along annular wheels 40A and 40B.
42, ... Are arranged in an annular shape. The bucket wheel 28 includes support pins 4 arranged in the casing 46.
By being fitted in 8, 48, ..., It is rotatably supported by the casing 46. Further, a ring gear 44 is formed on the inner periphery of one of the wheels 40A, 40B that supports the buckets 42, 42, ..., And the rotation shaft of the motor provided in the ring gear 44 and the casing 46. By engaging the gear 45 connected to the, the rotational force from the motor 36 is transmitted to rotate.

The chute 38 has buckets 42, 4
A guide plate for guiding the object to be transported to the fin conveyor 34 when the object to be transported scraped by 2, ... Is transferred from the bucket 42 to the fin conveyor 34. FIG.
Shows an enlarged side cross-sectional view of the chute 38. As shown in the figure, the chute 38A on the side (right side in the drawing) on which the transported object 32 scraped off by the buckets 42, 42, ... , An inclined portion L formed so that its inclination angle is equal to or greater than the repose angle of the transported object 32, an upper end of the inclined portion L, and a sheet start position where the transported object 32 falls and is discharged from inside the bucket 42. Convex curved portion R connecting with S
And is formed so as to have a sectional shape of a curved line having a bulge in the rotation direction of the bucket wheel 28. The shape of this curve is determined from the angle of repose of the transported object 32 and the chute start position. The inclination angle α formed by the lower end of the chute 38A is set to be equal to or greater than the angle of repose and the upper end of the chute 38 is set. The installation position is set to a position where the transported object 32 is first released from the bucket wheel 28 (shoot start position S), and the lower end and the upper end of the chute 38A have a bulge in the rotating direction of the bucket wheel 28. It is formed so as to form a curved line. In particular, it is preferable to form the transported object 32 ′ located at the shortest distance from the center O of the wheels 40 </ b> A and 40 </ b> B so as to approximate the shape of the parabola f drawn when the bucket wheel 28 is released from the bucket 42.

The operation of the embodiment of the bucket wheel type unloader according to the present invention constructed as described above is as follows. The transported object 32 (for example, grain, soda ash, lime, etc.) loaded in the ship 30 rotates the bucket wheel 28 and moves the bucket wheel 28 forward along the rotation direction of the bucket 42, 42 ...
Are scraped off one after another. And this bucket 4
The transported object 32 scraped off by 2, 42, ... Is conveyed upward by the rotation of the bucket wheel 28, and when the bucket 42 rotates to the chute start position S, it is released from the bucket 42 and dropped and discharged. Then, the transported object 32 released from the bucket 42 and dropped and discharged is guided by the chute 38A and transferred to the fin conveyor 34, and is sequentially conveyed to the outside of the ship 30 by the fin conveyor 34. At this time, since the slant angle α of the chute 38A is set to be equal to or greater than the repose angle of the transported object 32, the transported object 32 has poor fluidity, and even the transported object 32 having a large specific gravity is deposited on the lower part of the chute. It is transferred smoothly without. Further, since the installation position of the upper end of the chute 38A is set to the position where the transported object 32 is first released from the bucket wheel 28 (shoot start position S), the transported object 32 is set.
Are evenly transferred to the finned conveyor 34 without being biased. Further, by this, the number of rotations of the bucket wheel 28 can be increased, and the transport amount of the transported object 32 can be increased.

As described above, according to the chute 38A of the present embodiment, the buckets 42, 4 are provided even when the inclination angle of the chute 38A is steep (more than the repose angle of the transported object to be conveyed).
Since it is possible to lower (lower) the chute start position at which the transported object 32 drops and is discharged from 2, ... Even when transporting a transported object having poor fluidity and large specific gravity,
The chute 38 can be evenly transferred to the fin conveyor 34 without being accumulated in the vicinity of the lower part thereof. Further, since the rotation speed of the bucket wheel 28 can be increased, the transportation capacity can be improved without increasing the size of the device. By the way, in the case of a conventional flat plate-shaped chute, as shown in FIG.
As shown in, when the inclination angle of the shoot is set to α, the shoot start position becomes S ′, and the shoot start position becomes high.

[0019]

As described above, according to the present invention,
Even if the angle of inclination of the chute is set to a steep angle (greater than or equal to the repose angle of the transported object), the chute start position can be lowered (lowered), resulting in poor fluidity and large specific gravity. Even when the transported object is transported, it can be uniformly transferred to the transportation means without being unevenly accumulated near the lower part of the chute. Further, since the rotation speed of the bucket wheel can be increased, the transportation capacity can be improved without increasing the size of the device.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bucket wheel type unloader to which a chute according to the present invention is applied.

FIG. 2 is an enlarged side view of a feeder to which the chute according to the present invention is applied.

FIG. 3 is an enlarged front view of a feeder to which a chute according to the present invention is applied.

FIG. 4 is an enlarged sectional view of a chute according to the present invention.

[Explanation of symbols]

 10 ... Bucket wheel type unloader 20 ... Feeder 28 ... Bucket wheel 32 ... Transported object 34 ... Fin conveyor 38 ... Chute 38A ... Chute (transported object falling side) 42 ... Bucket

 ─────────────────────────────────────────────────── --Continued front page (72) Inventor Koji Tanaka 1-1-14 Kanda, Uchida, Chiyoda-ku, Tokyo Tokyo

Claims (3)

[Claims] 1. A bucket wheel in which a plurality of buckets are annularly arranged is rotated to scrape granular objects to be transported by the bucket, and the bucket wheels are rotated to transport the objects in the bucket scraped. Bucket wheel type comprising a feeder for dropping and ejecting an article from the inside of the bucket through a chute, and a transport means for transferring the transported article that has been dropped and ejected and for transporting the transferred article In the unloader, the chute has an inclined portion formed so that its inclination angle is equal to or greater than the repose angle of the transported object, an upper end of the inclined portion, and the chute from which the transported object falls and is discharged from the bucket. A bucket wheel type unloader, comprising: a convex curved portion connecting to a start position. 2. The cross-sectional shape of the chute is formed so as to approximate the shape of a parabola drawn by the transported object dropped and discharged from the bucket.
Bucket wheel type unloader described. 3. The bucket wheel type unloader according to claim 1, wherein the chute start position of the chute is installed at a position where the transported object is first released from inside the bucket.