JPH0986673A - Bucket wheel unloader - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To reduce an excavation reaction force when a bucket wheel is traveling or swinging. SOLUTION: Fins 42, 42, ... Are arranged at a predetermined interval on one side surface of a bucket wheel 28. Fin 42
Is attached so as not to project from the wheel 38 in the inner diameter direction, and is inclined 10 ° to 20 ° in the direction opposite to the rotation direction of the bucket wheel 28 with respect to the straight line L passing through the rotation center O of the wheel 38. The fins 42 also rotate with the rotation of the bucket wheel 28, and scrape the transported object 32 on the side surface of the bucket wheel 42. Accordingly, when the bucket wheel 28 travels or swings, the transported object 32 does not come into contact with the side surface of the bucket wheel pedestal 40, so that excavation resistance is reduced. Therefore, the power consumption can be reduced, and it is not necessary to increase the structural strength, so that the apparatus main body can be made lightweight and compact.

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 loading and unloading granular conveyed objects having physical properties such as apparent specific gravity and large internal friction angle.

[0002]

2. Description of the Related Art As shown in FIG. 7, a bucket wheel type unloader has a plurality of buckets 1 arranged in an annular shape, and a bucket wheel 2 rotatably supported by a bucket wheel pedestal 5 is rotated to For example, the transported object 3 such as coal or iron ore stored in the ship is scraped, the scraped transported object 3 is sequentially transferred to the fin conveyor 4, and is carried out of the ship.

[0003]

However, the conventional device for scraping the transported object 3 is not attached to the side surface of the bucket wheel 2 for scraping the transported object. For this reason, when the bucket wheel 2 travels or swings, there is a problem that the transported object 3 that hits the side surface of the bucket wheel pedestal 5 becomes resistance during the travel or swing, and the excavation reaction force increases. In addition, there is a problem that the excavation reaction force increases, power consumption increases, and the apparatus main body increases in size due to increase in structural strength of the boom and the like.

The present invention has been made in view of the above circumstances, and is a bucket wheel type that reduces the excavation reaction force during traveling or swing of the bucket wheel to reduce power consumption and to make the apparatus main body compact. The purpose is to provide an unloader.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of buckets arranged in an annular shape and rotates a bucket wheel rotatably supported by a bucket wheel pedestal to form a granular shape. In a bucket wheel type unloader for scraping an object to be transferred with the bucket, transferring the scraped object to transfer means, and transferring the transferred object, the side surface of the bucket wheel contacts the side surface of the bucket wheel receiving base. It is characterized by the provision of fins for breaking down objects.

According to the present invention, the fins provided on the side surface of the bucket wheel rotate as the bucket wheel rotates, and the objects to be conveyed on the side surface of the bucket wheel cradle are scraped. As a result, when the bucket wheel is traveling or swinging, the side surface of the bucket wheel pedestal does not come into contact with the transported object, so that excavation resistance is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a bucket wheel type unloader according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of an embodiment of a bucket wheel type unloader according to the present invention. As shown in the figure, the bucket wheel type unloader 10 is
Traveling frame 12, swing frame 14, horizontal boom 1
6. The vertical boom 18 and the scraper 20 are main components.

The traveling frame 12 has wheels 22, 22, ...
The vehicle travels by driving a drive motor (not shown) connected to 2, 22, .... The revolving frame 14 is rotatably supported above the traveling frame 12 and performs a revolving operation by driving a revolving means (not shown).

The horizontal boom 16 is supported on the upper part of the revolving frame 14 so as to be vertically swingable, and performs a hoisting operation by driving a cylinder 24 connected near the supporting portion. The vertical boom 18 is swingably supported in the lateral direction at the tip of the horizontal boom 16 and swings by driving a cylinder 26 connected to the upper end.

The scraper 20 is provided at the tip of the vertical boom 18, and rotationally drives a bucket wheel 28 that is rotatably supported to scrape the transported objects 32 stored in the ship 30. Perform a take action. Then, the scraped transported object 32 is transferred to the finned conveyor 34 provided on the horizontal boom 16 and the vertical boom 18.

As shown in FIG. 2, the bucket wheel 28 has buckets 36, 36, ...
Are fixed to a pair of wheels 38 formed in a ring shape at a predetermined interval. The bucket wheel 28 is rotatably supported by a bucket wheel pedestal 40 provided at the tip of the vertical boom 18, and is rotated by a drive device (not shown) provided inside the bucket wheel pedestal 40. To do.

Inside the bucket wheel pedestal 40,
A chute (not shown) is provided. This chute is scraped off by the bucket 36,
The object 32 to be conveyed, which falls from the bucket 36 as it rotates, is transferred to the finned conveyor 34.
Four fins 42, 42, ... Are fixed to the wheel 38 at predetermined intervals on one side surface of the bucket wheel 28. As shown in FIG.
It is configured by combining the plates 42A and 42B in an L shape. One plate 42A is installed perpendicularly to the swivel surface S of the bucket wheel 28 for scooping up the transported object 32, and the other plate 42B is transported by the one plate 42A. ′ Does not hit the bucket wheel pedestal 40, and is installed parallel to the swivel surface S so as to hold the transported object 32 ′ that has been scooped up.

Further, as shown in FIG.
Are arranged in the inner diameter direction so as not to project from the outer peripheral portion of the foil 38. Further, the fins 42 are installed so as to be inclined at a predetermined angle θ with respect to the straight line L passing through the rotation center O of the wheel 38 in the direction opposite to the rotation direction of the wheel 38. This is for facilitating the rotating fin 42 to bite into the transported object 32. However, when the inclination angle θ ₁ is too large as in the fin 42A shown in FIG. 4, the scraped transported object 32A is There is a possibility that the transported object 32A may fall again to the scraped position (double hatched portion in the figure) and it may not be meaningful. Therefore, the inclination angle θ of the fin 42 is different from that of the fin 42B shown in FIG.
The inclination angle θ ₂ is set so that the transported object 32B scraped by (4) falls to the scraping position by the bucket 36. This is the same as the inclination angle of the fin 42 when the transported object 32B falling from the fin 42B is set so as to pass near the rotation center of the wheel 38, and the physical properties of the transported object 32B and the bucket wheel rotation speed are determined. Depends on 10 ° to 20 °
Is preferred.

Further, when the fins 42 are installed so as to be inclined in the direction opposite to that shown in the drawing, the transported object 32 scraped by the fins 42 goes out of the excavation range of the bucket 36, and the fins 42 rotate when the fins 42 rotate. It is not preferable because it increases the resistance and the rotational torque increases. The operation of the embodiment of the bucket wheel type unloader according to the present invention configured as described above is as follows.

As shown in FIG. 2, the transported object 32 (for example, coal or iron ore) stored in the ship rotates the bucket wheel 28, and at the same time, is orthogonal to the rotating direction (arrow direction in the figure). ), The buckets 36, 36, ... Rotating sequentially are scraped off. The transported object 32 scraped off by the bucket 36 is transported upward by the rotation of the bucket 36, and
When is rotated to the chute start position, it is released and dropped and discharged. The transported object 32 dropped and discharged from the bucket 36
Are guided by the chute and transferred to the fin conveyor 34. The transferred object 32 transferred to the fin conveyer 34 is conveyed to the outside of the ship by the fin conveyer 34.

Fins 42, 42, ... Are provided on the side surface of the bucket wheel 28, and the fins 42 rotate as the bucket wheel 28 rotates. The transported object 32 that contacts the side surface of the bucket wheel 28 is scraped by the rotating fin 42 and scraped by the fin 42. The transported object 32 ′ scraped off by the fins 42 falls from the fins 42 when the fins 42 rotate to a predetermined position.
At this time, since the fins 42 are provided so as to be inclined by 10 ° to 20 °, the transported object 32 falling from the fins 42 is located in front of the scraping position by the fins 42, that is, the bucket 36.
It falls to the scraping position. As a result, the transported object 32 does not hit the inner peripheral surface of the side surface of the bucket wheel 28. Therefore, the excavation reaction force at the time of swing is reduced on the side surface of the bucket wheel pedestal 40.

As described above, according to the bucket wheel type unloader of this embodiment, the fins 42, 42, ...
Since the transported object 32 that contacts the side surface of 0 is scraped, the transported object 32 does not hit the side surface portion of the bucket wheel pedestal 40. As a result, excavation resistance during traveling or swinging of the bucket wheel 28 is reduced, so that power consumption can be reduced. Further, since the excavation resistance is reduced, it is not necessary to increase the structural strength of the horizontal boom 16 and the vertical boom 18, so that the apparatus main body can be made lightweight and compact.

When excavating the transported object 32 having a large internal friction angle and a large excavation reaction force, a large number of fins 42 should be provided as shown in FIG. Can be dealt with. When the physical density of the transported object 32 is large and the strength of the fins 42 needs to be increased, the length of each fin 42 is extended and the fins 42 are joined together as shown in FIG. It can be dealt with by integrating.

[0019]

As described above, according to the present invention,
The fins that rotate together with the bucket wheel scrape off the transported object that comes into contact with the side surface of the bucket wheel pedestal, so that the transported object does not hit the side surface of the bucket wheel pedestal.
As a result, excavation resistance during traveling or swinging of the bucket wheel is reduced, so that power consumption can be reduced. Further, since the excavation resistance is reduced, it is not necessary to increase the structural strength of the device body, so that the device body can be made lightweight and compact.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bucket wheel type unloader.

FIG. 2 is a perspective view of a scraper of a bucket wheel type unloader.

FIG. 3 is an explanatory view of fins.

FIG. 4 is an explanatory view of fins.

FIG. 5 is a perspective view of another embodiment of the scraper of the bucket wheel type unloader.

FIG. 6 is a perspective view of another embodiment of the scraper of the bucket wheel type unloader.

FIG. 7 is a perspective view of a scraper of a conventional bucket wheel type unloader.

[Explanation of symbols]

 10 ... Bucket wheel type unloader 28 ... Bucket wheel 34 ... Fin conveyor 36 ... Bucket 38 ... Wheel 40 ... Bucket wheel cradle 42 ... Fin

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

Claims (2)

[Claims] 1. A plurality of buckets are arranged in an annular shape, and a bucket wheel rotatably supported by a bucket wheel pedestal is rotated to scrape a granular transported object with the bucket, and the scraped transported object is scraped. In a bucket wheel type unloader for transferring and transporting to a transport means, a bucket wheel type unloader is provided on the side surface of the bucket wheel, the fins scraping down the transported object that contacts the side surface of the bucket wheel receiving base. Unloader. 2. The fin is provided so as to be inclined with respect to a radial direction of the bucket wheel in a direction opposite to a rotation direction of the bucket wheel by a predetermined angle, and the predetermined angle is the transfer target scraped by the fin. The bucket wheel unloader according to claim 1, wherein when the object is lifted by the fins and falls, the objects are set so as to pass near the center of the bucket wheel.