JPH06271082A - Bucket wheel type continuous unloader - Google Patents

Abstract

PURPOSE:To embody the high efficiency in a landing work by scooping a bulk material in a stored place from top to bottom part, and also reduce the electric power consumption. CONSTITUTION:A lower edge part 8a is constituted so as to be tiltable through an intermediate folding mechanism 10 on a vertical arm 8 which supports a bucket wheel device 11, which is formed in a bucket wheel type. A mechanism 27 for holding a bucket 23 so as to be selected between a state where each top edge of a plurality of buckets 23 which are pivotally installed on the outer peripheral side of the bucket wheel 21 draws a circular motion locus L and a state where the top edge of the bucket 23 positioned on the nearly lower rank side of the bucket wheel 21 draws a rectilinear motion locus Lo is installed on the bucket wheel device 11.

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 continuous unloader used for continuously landing or discharging unloaded materials such as coal, iron ore, and grains.

[0002]

2. Description of the Related Art Generally, this type of unloader suspends a vertical arm on the tip of a boom supported by a portal on the wharf side and extending to the top of a bulk carrier, and a bucket wheel device is attached to the lower end of the vertical arm. This bucket wheel device is configured to scoop loose items in a bulk carrier and continuously carry the scooped loose items to the land side via a vertical conveyor, a boom conveyor, or the like.

Most of the above unloaders are composed of grab buckets, but since they are relatively inefficient, conventionally, as shown in FIG. 16, front and rear sprockets 201, 202 and not shown. An endless bucket chain 203 on the rear upper sprocket
Is wrapped around to form a substantially L-shape, and the bucket chain 2
A large number of buckets 204 are attached to 03, and the bucket chain 203 is rotated by the sprockets 201 and 202, whereby a bucket E is scooped up by the bucket 204 to form a bucket elevator.

[0004]

However, in the conventional bucket elevator type continuous unloader having the above-mentioned structure, since the excavating device is constituted by the bucket elevator, the bulk material M is excavated over a wide range. In other words, it is necessary to sequentially move the bucket elevator itself in the width direction, and this requires moving the entire unloader, including the portal, little by little, and therefore, there is only a disadvantage in operability. And, the power loss becomes extremely large.

Further, a plurality of buckets 204 in the lower portion of the bucket chain 203 are simultaneously sewn by the loose objects M.
Since the excavation force during normal operation is small, it is difficult to scoop the loose object M deeper than the height of the bucket. Further, since the bucket elevator itself cannot be turned tightly, it is difficult to scoop the loose material M in the inner portion of the bulk carrier, and the remaining loose material M can be cleaned up.
The introduction of auxiliary machines such as bulldozers is essential.

The present invention has been made in order to solve the above-mentioned various problems, and it is possible to improve the efficiency of the paying-out work by scooping loose objects in a loose product in every corner.
Moreover, it is an object of the present invention to provide a bucket wheel type continuous unloader that is highly reliable and can reduce power loss.

[0007]

In order to achieve the above-mentioned object, a bucket wheel type continuous unloader according to the present invention is supported on the payout side of loose materials, and is vertically attached to the tip of a boom extending on a loose material stack. In a bucket wheel type continuous unloader that attaches a bucket wheel device via an arm and scoops loose items in a bulk product by this bucket wheel device to carry out to the payout side,
The vertical arm is configured to be rotatable about its axis, and the lower end side is tiltable by interposing an intermediate folding mechanism in the upper and lower intermediate parts, and is supported by the lower end of the vertical arm to rotate around a horizontal axis. The bucket wheel device is configured by pivotally supporting a plurality of buckets on the outer peripheral surface of the bucket wheel driven to rotate at intervals in the rotation circumferential direction, and a state in which each tip of the bucket draws a circular motion trajectory,
The bucket wheel device is equipped with a mechanism for holding the bucket so that each tip of the bucket located substantially below the bucket wheel can be switched to a state of drawing a linear motion locus.

As the bucket holding mechanism, the bucket positioned substantially above the bucket wheel is locked so that its tip draws a circular motion locus, and the bucket positioned substantially below the bucket wheel has a tip circular. It is preferable to use a lock means for releasing the state of drawing the movement locus and changing it to the state of drawing the linear movement locus.

It is desirable that the locking means is composed of an electromagnet that removably attracts the bucket.

It is also possible to provide bucket guide means for guiding the bucket positioned substantially below the bucket wheel such that the tip of the bucket wheel draws a linear motion locus.

[0011]

According to the present invention, in the bucket wheel device, the tip end of the bucket supported on the outer circumference of the bucket wheel draws a circular motion locus, and the tip ends of the buckets located substantially below the bucket wheel have linear motion loci. Since it is configured so that it can be switched to the state of drawing, during normal operation, by setting the bucket so that its tip draws a circular motion trajectory, it is possible to scoop deeply with a strong excavating force against loose objects. , Furthermore, when the vertical arm supporting the bucket wheel device is folded in the middle and the lower end side is tilted, the bucket wheel device can be swiveled around the axis of the vertical arm while scooping loose objects, so that the portal etc. The amount of movement of the entire unloader including It, not only reliable, power loss is small, wasteful power consumption is suppressed. Also,
By tilting the bucket wheel device with the vertical arm bent in the middle, loose objects in the deep part of the pile can be easily scooped out, especially when bottoming out the loose objects.
By switching the bucket holding posture so that the tip of the bucket draws a linear motion locus, it is possible to effectively scoop loose items, and it is not necessary to introduce an auxiliary machine such as a bulltozer for scraping loose items.

Further, by providing the above-mentioned locking means, it is possible to reliably hold the state in which the tip of the bucket draws a circular movement locus.

When an electromagnet is used as the locking means, each state of holding the bucket can be automatically selected by a simple operation, and the work operation is easy.

Further, when the bucket guide means is provided, the transition to a state in which the tip of the bucket draws a linear motion trajectory is smooth, and noise and vibration are reduced.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic configuration diagram showing a bucket wheel type continuous unloader according to the present invention.

In FIG. 1, reference numeral 1 is a bulk carrier docked at a wharf 2 on which bulk materials M such as coal and iron ore are loaded. Reference numeral 3 denotes a portal movable along a rail 4 on the wharf 2, which is provided with a chute 5, an in-machine conveyor 12, and the like. A boom 7 extending up to is supported. Reference numeral 8 denotes a vertical arm suspended on the tip end portion 7a of the boom 7, which is provided with a vertical conveyor 9 and the like, and a bucket wheel device 11 for scooping the loose material M is attached to the lower end thereof. . That is, the loose material M scooped by the bucket wheel device 11 passes through the vertical conveyor 9, is carried out from the boom conveyor 6 to the in-machine conveyor 12 by the chute 5, and is taken out to the quayside conveyor 13.

A middle folding mechanism 10 is interposed between the upper and lower intermediate portions of the vertical arm 8, and a lower end portion 8a of the middle folding mechanism 10 is tiltable. Further, the vertical arm 8 is configured such that at least the lower end portion 8a thereof can be pivotally displaced about the axis by a device (not shown).

Specific examples of the construction of the bucket wheel device 11 are shown in FIGS. In each drawing, 21 is a cylindrical bucket wheel supported by a horizontal shaft 22, and a plurality of buckets 23 are arranged on the outer periphery thereof at equal intervals in the rotation circumferential direction, and each bucket 23 sandwiches it. Four links 24 and 25 on both sides and pivot pins 26a to 26d
The bucket wheel 21 is pivotally attached to the bucket wheel 21 so as to be swingable in the circumferential direction. The one link 24 is formed in a V shape, and one end side thereof is connected to the adjacent bucket 23 on the front side in the rotation direction via a pivot pin 26e.
Reference numeral 31 is a rotary drive device for the bucket wheel 21, and 32 is a chute for transferring the loose material M scooped by the bucket 23 to the vertical conveyor 9.

The bucket wheel device 11 is shown in FIG.
As shown in FIG.
A bucket holding mechanism 27 is provided for switching between a state of drawing and a state in which the tip end of the bucket 23 positioned substantially below the bucket wheel 21 draws a linear motion locus Lo. Specifically, a bucket guide 28 for drawing a linear motion locus L0 is provided for the bucket 23 located on the substantially lower side of the bucket wheel 21 so as to be able to advance and retreat in the vertical direction. It is configured to be driven up and down through a drive mechanism 30 having a cylinder 29. Further, when the tip end of the bucket 23 is held in a state of drawing a circular motion, the bucket 23 is fixed by, for example, a cotter pin (not shown).

The operation of the bucket wheel device 11 is as follows. That is, during the normal operation until the unloading work of the loose material M is near the end plate, the bucket guide 28 is moved upward by the drive mechanism 30, and the bucket 23 is moved by the cotter pin or the like (not shown) as shown in FIG. The outer peripheral side of the wheel 21 is fixedly locked. When the bucket wheel 21 is rotated in this state, each tip of the bucket 23 draws a circular motion locus L.
The bucket 23 located on the lowermost side of 1 continuously scoops the loose material M.

Since the excavating device is of the bucket wheel type, the bucket 23 for the bulk material M is in normal operation.
The contact surface of is small and a large excavating force can be obtained. For this reason,
The excavation height per operation can be increased to deeply scoop. As a result, even if the surface of the bulk object M after excavation with a grab bucket or the like is uneven, efficient excavation is possible.

Further, the vertical arm 8 for suspending the bucket wheel device 11 is provided with the center folding mechanism 10 and
Since the lower end portion 8a side is configured to be tiltable, during normal operation as described above, for example, while rotating the bucket wheel device 11 around the axial center of the vertical arm 8, the range shown by the chain line P in FIG. After excavation, the excavation range is gradually expanded as shown by the chain line Q by continuing the excavation operation while tilting the lower end portion 8a of the vertical arm 8 little by little with respect to the axis.
That is, a wide range of excavation can be realized only by turning the vertical arm 8 and the bucket wheel device 11 without moving the entire part including the portal 3 and the like, and it is possible to save energy by suppressing power loss.

The lower end portion 8 of the vertical arm 8 is also
By tilting a, it is possible to perform a sharp turning excavation operation by the bucket wheel device 11 in this tilted posture. Therefore, as shown in FIG. The object M can also be easily scooped up.

Further, when the landing work of the bulk material M progresses and the accumulated amount decreases, the cotter pin in the bucket wheel device 11 is removed and the bucket guide 28 is projected downward through the drive mechanism 30. With the rotation of the bucket wheel 21, the bucket 23 that has moved from the substantially upper side to the substantially lower side is moved to the bucket guide 28.
As shown in FIG. 4, the tip of the bucket 23 draws a linear movement locus Lo. For this reason, the scooping of the loose material M at the time of bottoming-out in which the deposition amount of the loose material M becomes small is effectively performed, and this bottoming-out work can be smoothly performed without the help of a bulldozer or human power. . In addition, the above-mentioned bucket 23 is a character-shaped link 2
Since the buckets 23 are connected with each other, the impact when the bucket 23 is dropped and moved from the substantially upper side to the substantially lower side by its own weight is mitigated, and the bucket 23 is prevented from being damaged.

By the way, in the above embodiment, the cotter pin is used as the locking means for holding the tip of the bucket 23 in the state of drawing the circular motion locus L as in the normal operation, but instead of this, the cotter pin is used. As shown in FIG. 7, a plurality of electromagnets 71 for detachably attracting and holding the buckets 23 corresponding to the buckets 23 are arranged at equal intervals in the circumferential direction of rotation of the bucket wheel 21, and during normal operation, All the buckets 23 are attracted to the electromagnet 71 and the buckets 2
3 so that the tip of 3 draws a circular motion locus L, and during the bottoming operation, the electromagnet 71 is moved with respect to the bucket 23.
Alternatively, the suction of the bucket 23 may be released so that the tip of the bucket 23 draws a linear circular motion locus Lo. As described above, by using the electromagnet 71, the state change of the bucket 23 can be easily controlled by a simple operation from the outside.

Further, in the bucket wheel device 11, as shown in FIG. 8, the fixed guide rail 8 having a substantially arcuate upward shape corresponding to the lower side of the bucket wheel 21.
1, and on the other hand, the guide roller 8 which is guided by rolling contact with the fixed guide rail 81 at the substantially central portion of the links 24, 25.
2A and 82B are attached, whereby the bucket holding mechanism 84 is configured. Then, during normal operation, a cylinder (not shown) or the like causes the bucket wheel 21 to hold all the buckets 23 at the positions indicated by the chain lines via the links 24 and 25 so that the tip end of the bucket 23 moves circularly. In addition, during the bottoming operation, the bucket 23 positioned on the lower side of the bucket wheel 21 is guided by the guide roller 8 by the cylinder or the like as shown by a solid line.
By displacing along the fixed guide rail 81 via 2, the transition is made smooth, and a linear motion locus Lo can be drawn at the tip of the bucket 23.

Further, the fixed guide rail 81 as described above is used.
Instead of using each bucket, as shown in FIG.
Each time, the base end side of an arcuate movable guide rail 92 whose tip end side receives a spring force inward in the radial direction by a tension spring 91 is rotatably supported by a bucket wheel 21 via a pin 93. Then, the base end side of the movable guide rail 92 is driven by the cylinder 94, and the bucket holding mechanism 95 is
May be configured. In other words, during normal operation, the movable guide rail 92 is pivotally displaced in the clockwise direction about the pin 93 as a fulcrum by the spring force of the tension spring 91, so that the bucket 23 is held close to the bucket wheel 21 side via the link 24. By doing so, the circular motion locus L as described above can be drawn at the tip of the bucket 23, and during bottoming operation, with the cylinder 94 corresponding to the bucket 23 that has reached the lower side of the bucket wheel 21. By linearly displacing the movable guide rail 92 counterclockwise and separating the bucket 23 from the bucket wheel 21 as shown in the drawing, a linear motion locus Lo can be drawn at the tip of the bucket 23.

FIGS. 10 to 13 show another embodiment of the present invention, in which each bucket 23 is swingable with respect to the bucket wheel 21 side via two horizontal pivot pins 101. It is pivotally supported. The bracket 102 fixed between the buckets 23 and fixed to the outer peripheral surface of the bucket wheel 21 has a lock lever 104 extending outward of the bucket wheel 21 via a support shaft 103 extending in the radial direction of the bucket wheel 21. Is rotatably supported,
A lock piece 106 that releasably engages with the engagement portion 105 on the bucket 23 side is provided at the base end portion 104a of the lock lever 104 in a protruding manner. Reference numeral 107 denotes the base end portion 104a of the lock lever 104 and the bucket wheel 21.
It is a return spring that is hung between the side and the side and constantly urges a spring force in the engaging direction of the lock piece 106. The bucket wheel 2 is attached to the fixed bodies 108 respectively corresponding to the substantially uppermost and the lowermost of the bucket wheel 21.
The rotation position of the lock lever 104 is temporarily restricted in accordance with the rotation of No. 1, and the engaging portion 105 of the lock piece 106 is substantially at the highest position.
Cylinders 109A and 109B that allow the engagement with the lock lever 104 and allow the engagement with the lock lever 104 and the like are released at the lowest position, and constitute the bucket holding mechanism 110.

In this embodiment, FIG. 12 and FIG.
By advancing the piston rod 109a of the substantially uppermost cylinder 109A shown in FIG. 3 toward the lock lever 104 side, the free end 104b of the lock lever 104 is moved to the cylinder 109A as the bucket wheel 21 rotates. After being pivotally displaced from the solid line position to the chain line position by being restricted by the piston rod 109a, the lock piece 106 that receives the spring force of the return spring 107 engages with the engaging portion 105 of the bucket 23 that has passed the uppermost position. Lock it in a state where it cannot swing. And in this state,
A circular motion locus of the tip of the bucket 23 can be drawn during normal operation.

Further, as shown in FIGS. 10 and 11, the piston rod 109a of the lowest cylinder 109B is shown.
By advancing the lock lever 104 toward the lock lever 104 side, the lock piece 106 engaged with the engaging portion 105 of the bucket 23 immediately before reaching the lowest position as the bucket wheel 21 rotates causes the piston of the cylinder 109B to move. Rod 1
Since it is restricted by 09a and pivotally displaced from the solid line position to the chain line position, the engagement of the lock piece 106 is released, and the bucket 23 that has passed the lowest position becomes swingable. As it is, it is possible to draw a linear motion locus at the tip of the bucket 23 that has reached the substantially lower side of the bucket wheel 21 during bottoming operation or the like.

Although the unloader installed in the wharf 2 has been described in the above embodiment, FIG.
The unloader R may be installed on the bulk carrier 1, as shown in FIG. Further, as shown in FIG. 15, instead of the bulk carrier, the unloader R may be installed in, for example, a land-based coal storage yard 111. In addition, it goes without saying that the bucket wheel type continuous unloader according to the present invention is not limited to the above-described embodiments, and appropriate modifications can be made within the scope of the technical content of the present invention.

[0032]

As described above, according to the first aspect of the present invention, the excavation device supported by the vertical arm is of the bucket wheel type, and the tip of the bucket draws a circular motion locus and the lower position of the bucket wheel. Since the tip of the bucket that reaches the side can be switched to a state in which it draws a linear motion, it is possible to exert a large excavating force by drawing a circular motion locus in the bucket tip during normal operation. Since the vertical arm has a center-folding structure, it is possible to excavate bulk material in a wide range without frequently moving the entire unloader. Therefore, the power loss for moving the entire unloader is extremely reduced, power saving is easy, and the work reliability is high.
In addition, loose objects such as the inner part of the bottom of the ship can be easily scooped. Moreover, if the tip of the bucket draws a linear motion locus, it is possible to scoop up all loose things without depending on auxiliary machines such as a bulltozer during bottoming operation, and to clean up loose things. It can make a big contribution.

Further, according to claim 2 of the present invention, the bucket positioned substantially above the bucket wheel is locked in a state of drawing a circular motion locus, and the lock is released at the substantially lower side of the bucket wheel to unlock the bucket. Since the locking means for drawing the linear motion locus is introduced, it is possible to surely hold each state of the bucket.

Further, according to claim 3 of the present invention, since the locking means is constituted by an electromagnet for detachably attracting and holding the bucket, each state of the bucket is automatically controlled by a simple operation from the outside. Therefore, the work operation can be facilitated.

Further, according to the fourth aspect of the present invention, since the guide means for restricting and guiding the bucket positioned substantially below the bucket wheel so as to draw a linear motion locus is provided, the bucket is linear. It is possible to smoothly transition to a state in which the movement trajectory is drawn, to prevent generation of large noise and vibration when the state changes, and to suppress damage to the bucket.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram showing an embodiment of a bucket wheel type continuous unloader according to the present invention.

FIG. 2 is a front view showing the bucket wheel device in the bucket wheel type continuous unloader in the same embodiment during a normal operation.

FIG. 3 is a side sectional view of the bucket wheel device.

FIG. 4 is a front view showing the bucket wheel device in a bottoming operation.

FIG. 5 is an explanatory diagram of an example of excavation operation by the bucket wheel device.

FIG. 6 is an explanatory diagram of an example of excavating a bulk material at the back with the bucket wheel device.

FIG. 7 is a front view showing an example of locking means for a bucket in a bottoming operation state.

FIG. 8 is a front view showing an example of guide means for the bucket.

FIG. 9 is a front view showing another example of the guide means for the bucket.

FIG. 10 is a front view showing a bucket holding mechanism in a bucket unlocked position as another embodiment of the present invention.

FIG. 11 is a bottom view of that of FIG.

FIG. 12 is a front view showing the bucket holding mechanism and a bucket lock position.

FIG. 13 is a top view of that of FIG.

FIG. 14 is an overall schematic configuration diagram showing a second embodiment of a bucket wheel type continuous unloader according to the present invention.

FIG. 15 is an overall schematic configuration diagram showing a third embodiment of a bucket wheel type continuous unloader according to the present invention.

FIG. 16 is a configuration diagram of an apparatus in a conventional continuous unloader.

[Explanation of symbols]

 1 Bulk carrier 2 Wharf 7 Boom 8 Vertical arm 8a Lower end of vertical arm 10 Middle folding mechanism 11 Bucket wheel device 12 Inboard conveyor 13 Quay conveyor 21 Bucket wheel 23 Bucket 27,84,95,110 Bucket holding mechanism 28,81, 92 Guide means 71 Locking means (electromagnet) L Circular movement locus Lo Linear movement locus M Loose object

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yugo Nakagami 3-1, 1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Ltd. Kobe factory (72) Inventor Takashi Nakano Chuo-ku, Kobe-shi, Hyogo Higashi Kawasaki Town 3-1-1 Kawasaki Heavy Industries Ltd. Kobe Factory (72) Inventor Akira Kawasaki 2-13-7 Chuo 2-chome, Hachimanto-ku, Kitakyushu, Fukuoka

Claims (4)

[Claims] 1. A bucket wheel device is attached to a tip end portion of a boom, which is supported on the dispensing side of the bulk material and extends on the bulk product, through a vertical arm, and the bulk object in the bulk product is mounted by the bucket wheel device. In a bucket wheel type continuous unloader that is picked up and carried out to the payout side, the vertical arm is configured to be rotatable about its axis, and the lower end side can be tilted by interposing a center bending mechanism in the upper and lower intermediate parts. The bucket wheel device is configured by pivotally supporting a plurality of buckets on the outer peripheral surface of a bucket wheel that is supported by the lower end of the vertical arm and is driven to rotate about a horizontal axis at intervals in the rotation circumferential direction. However, the state where each tip of the bucket draws a circular locus, and the tips of the buckets located substantially below the bucket wheel A bucket wheel type continuous unloader, characterized in that the bucket wheel device is equipped with a mechanism for holding the bucket so that the bucket can be switched to a state in which a linear motion locus is drawn. 2. As the bucket holding mechanism, the bucket positioned substantially above the bucket wheel is locked so that its tip draws a circular motion locus, and the bucket positioned approximately below the bucket wheel is 2. The bucket wheel type continuous unloader according to claim 1, further comprising lock means for releasing the state of drawing the circular motion locus and changing it to the state of drawing the linear motion locus. 3. The bucket wheel type continuous unloader according to claim 2, wherein the locking means is composed of an electromagnet that removably attracts the bucket. 4. The bucket wheel type continuous unloader according to claim 1, further comprising bucket guide means for guiding the bucket located substantially below the bucket wheel so that the tip of the bucket wheel draws a linear motion locus.