Reclaimer

Abstract

To provide a bucket of a reclaimer and the reclaimer capable of optimizing the balance between the storage efficiency of bulk materials and the operation energy (power consumption) of the reclaimer.SOLUTION: In a bucket 2 of a reclaimer composed of a plurality of buckets attached in the circumferential direction of a bucket wheel 1 and scraping off loaded bulk materials from an intake port 4 into a storage part 3, the ratio of a bucket wheel radial dimension H of the intake port 4 to a bucket wheel circumferential dimension L of the storage part 3 is set to 1.65>L / H≥1.15.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a bucket of a reclaimer and a reclaimer that are attached in a plurality in the circumferential direction of a bucket wheel and scrape bulk materials piled up from an intake port into a storage portion.

Background Art

[0002] A reclaimer is used to discharge bulk materials such as iron ore, coal, and lime piled up in a yard onto a yard conveyor. The reclaimer rotates a bucket wheel having a plurality of buckets attached in the circumferential direction in a predetermined direction, so that the piled-up bulk materials are accommodated and scraped from the intake port of each bucket into the storage portion. The piled-up bulk materials are scraped when the buckets on the outer periphery of the bucket wheel are located at the lower part, and when the buckets are moved to the upper part, the bulk materials in the storage portion fall by their own weight and are discharged onto the yard conveyor. As such a bucket of a reclaimer, for example, there is one described in Patent Document 1 below. This bucket is provided with a drainage opening near the intake port of the outer plate member in the radial direction of the bucket wheel that becomes the bottom of the storage portion when scraping bulk materials, and a longitudinally long weir is provided in the direction of the bucket wheel axis at a position deeper in the storage portion than that. In this bucket of the reclaimer, it is possible to effectively suppress the slippage of bulk materials on the inclined yard conveyor by reducing the amount of water in the yard puddle scooped up together with the bulk materials.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Incidentally, in order to improve the efficiency of dispensing bulk material by a reclaimer, one possible approach is to increase the bulk material capacity of each bucket, i.e., the capacity of the bucket's storage section. When increasing the capacity of the bucket's storage section, the dimensions in the direction of the bucket wheel axially are fixed. Therefore, to increase the capacity of the storage section, it is necessary to increase the radial dimension (height) of the bucket wheel at the intake and the circumferential dimension (depth) of the bucket wheel at the storage section. However, if the depth of the bucket's storage section is increased, there is a risk that the entire amount of bulk material in the storage section cannot be collected in a single scraping (inefficient). Also, if the depth of the bucket's storage section is too large, the number of buckets that can be attached to the bucket wheel decreases, which actually reduces the efficiency of dispensing bulk material. On the other hand, increasing the height of the bucket increases the scraping resistance of the bulk material, which is a trade-off that increases the operating energy of the reclaimer, specifically the power consumption. Therefore, there is room for consideration regarding the balance between the bulk material collection efficiency in each bucket and the operating energy (power consumption) of the reclaimer.

[0005] The present invention has been made in view of the above problems, and its objective is to provide a bucket for a reclaimer and a reclaimer that can optimize the balance between the bulk material storage efficiency and the operating energy (power consumption) of the reclaimer. [Means for solving the problem]

[0006] To achieve the above objective, one aspect of the present invention provides a reclaimer bucket in which a plurality of buckets are attached circumferentially to the bucket wheel, and the bucket scrapes the stacked bulk material from the intake opening into the storage section, wherein the ratio of the radial dimension (height) H of the bucket wheel at the intake opening to the circumferential dimension (depth) L of the bucket wheel at the storage section is 1.65 > L / H ≥ 1.15.

[0007] Furthermore, in one aspect of the present invention, a reclaimer provided with the above-mentioned bucket is characterized in that a side cover is provided such that the inner surface of the bucket is located at a distance of 10 times or more from both sides of the bucket in the direction of the bucket wheel axis relative to the gap between the bucket and a stator disposed radially inward of the bucket wheel opposite to the opening on the inner side of the bucket wheel radially in the bucket wheel housing portion.

[0008] Furthermore, in one aspect of the present invention, a reclaimer equipped with the above-mentioned bucket is characterized in that a member located below a roller that rotatably supports the bucket wheel from the inside in the radial direction of the bucket wheel is provided with a downward-penetrating opening. [Effects of the Invention]

[0009] According to the bucket of the reclaimer of the present invention, by defining the ratio of the height H of the intake opening to the depth L of the storage section as 1.65 > L / H ≥ 1.15, it is possible to optimize the balance between the bulk material storage efficiency and the operating energy (power consumption) of the reclaimer. That is, if 1.65 ≤ L / H, the depth L is too large relative to the height H, and when bulk material is scraped, gaps are created in the storage section, reducing storage efficiency. On the other hand, if L / H < 1.15, the height H is too large relative to the depth L, and the operating energy (power consumption) of the reclaimer increases.

[0010] Furthermore, since it is possible to prevent the loose material spilled from the bucket from becoming packed onto the outer surface of the stator, it is possible to avoid wasting operating energy (power consumption) associated with the rotation of the reclaimer, especially the bucket wheel. Furthermore, since it is possible to prevent the loose material spilled from the bucket from becoming compressed between the roller and the lower support, it is possible to avoid wasting operating energy (power consumption) associated with the rotation of the reclaimer, especially the bucket wheel. [Brief explanation of the drawing]

[0011] [Figure 1]This is a front view showing a schematic configuration of one embodiment of a bucket wheel using a bucket of the present invention. [Figure 2] Figure 1 is a detailed diagram illustrating the bucket and rollers of the reclaimer. [Figure 3] This is an explanatory diagram that defines the upper limit of the bucket's depth. [Modes for carrying out the invention]

[0012] Below, an embodiment of the bucket and reclaimer of the present invention will be described in detail with reference to the drawings. The embodiment shown below illustrates an apparatus and method for realizing the technical idea of ​​the present invention, and the technical idea of ​​the present invention is not limited to the following embodiment in terms of the material, shape, structure, arrangement, etc. of the components. Also, the drawings are schematic. Therefore, it should be noted that the relationship and ratio of thickness and planar dimensions may differ from those in reality, and there are parts where the dimensional relationships and ratios differ between drawings.

[0013] Figure 1 is a schematic front view of the bucket of the reclaimer and a bucket wheel 1 showing one embodiment of the reclaimer. The left half of the bucket wheel 1 shown in Figure 1 shows a cross-section of the bucket 2, which will be described later. The bucket wheel 1 is used with the top of the figure facing approximately upward. In this embodiment, multiple buckets 2, 12 in this example, are attached along the outer circumference of the roughly ring-shaped bucket wheel 1. As mentioned above, bulk materials stacked in the yard are scraped off when the buckets 2 on the outer circumference of the bucket wheel 1 are in the lower (bottommost) position. The scraped bulk materials are stored in the storage section 3 of the bucket 2. Then, when the bucket 2 is moved to the upper position, the bulk materials in the storage section 3 fall into the chute 51 by their own weight and are discharged onto the yard conveyor 52. The bucket wheel 1 is constructed by arranging two ring-shaped plate members 31 parallel to each other in the direction perpendicular to the plane of the paper and connecting them to each other (with buckets 2, etc.).

[0014] As shown in the figure by the dashed-dotted circle (pitch circle), the bucket wheel 1 has teeth arranged continuously along its circumference that mesh with the chain, and the entire bucket wheel 1 constitutes one driven sprocket 32. On the other hand, a drive sprocket 33 is positioned at the upper end of the bucket wheel 1, and tension sprockets 34 are positioned slightly below it on both the left and right sides in the figure. The chain 35 wound around the drive sprocket 33 and tension sprockets 34 meshes with the driven sprocket 32 ​​of the bucket wheel 1. Therefore, when the drive sprocket 33 is rotated by an electric motor (not shown), the bucket wheel 1 rotates in a predetermined direction (clockwise in the figure) as the chain 35 rotates. This rotation direction of the bucket wheel 1 is defined as the scraping direction.

[0015] The shape of the bucket 2 will be described in detail later, but in this embodiment, since the clockwise direction is the scraping direction, the buckets are attached to the bucket wheel 1 such that the left side of the figure is the intake opening 4 when viewed from below, and the right side is the intake opening 4 when viewed from above. The buckets 2 are intended to scrape up bulk materials piled up in the yard and store them in the back of the storage section 3, so their form will be described using the bucket 2 on the bottom left of Figure 1 as an example. The bucket 2 has a substantially curved back plate portion 36 that is convex outward in the direction of the diameter of the bucket wheel so that the intake opening 4 side is lower and the back (depth side) of the storage section 3 gradually gets higher in order to scoop up bulk materials from the yard (ground) (see Figure 2a). The back plate portion 36 may be made by joining a plurality of flat plate members without gaps. The bucket 2 is provided with side plate portions 37 that close off both ends of the back plate portion 36 in the direction of the bucket wheel axis, and these together form the storage section 3 of the bucket 2.

[0016] The storage section 3 of bucket 2 extends into the interior of bucket wheel 1 (between the two ring-shaped plate members 31), and therefore the bulk material is stored inside bucket wheel 1. In other words, in this embodiment, the interior of bucket wheel 1 constitutes part of the storage section 3 of bucket 2. For this reason, a liner (lining) member 40 is attached to the interior of bucket wheel 1 (the inner surfaces of the opposing ring-shaped plate members 31) to suppress wear and damage caused by collisions and rolling of the bulk material. The inner side of the storage section 3 (=bucket wheel 1) of bucket 2 in the direction of the bucket wheel diameter is open. In addition, a plate-shaped scooping section 38 and a restricting section 39 that widen outward are extended from the intake opening 4 of bucket 2 toward the front in the scraping direction, of which the scooping section 38 is connected to the back plate section 36 and the restricting section 39 is connected to the side plate section 37.

[0017] As mentioned above, the bulk material is scraped when bucket 2 is at its lowest point and discharged when it is at its highest point, and in this embodiment, the scraping direction is clockwise. Therefore, in the left half of Figure 1, the bulk material is contained within the storage portion 3 of bucket 2 (including the inside of bucket wheel 1). Also, the inner side of the storage portion 3 of bucket 2 (=bucket wheel 1) in the direction of the bucket wheel is open. Therefore, a stator 5 is provided on the radial inner side of bucket wheel 1 in the left half of the figure, covering the open portion on the radial inner side of the storage portion 3 of bucket 2 (=bucket wheel 1). This stator 5 is a restricting member that prevents the bulk material in the storage portion 3 of bucket 2 from spilling out through the open portion on the radial inner side of bucket wheel, and is arranged to cover the radial inner surface of bucket wheel 1.

[0018] Figure 2b shows a cross-section of the stator 5. The stator 5 itself, as a bulk material regulating member, is a plate member with a convex, arc-shaped cross-section on the radially outward side of the bucket wheel. A liner (inner lining) member is attached to the radially outer surface of the stator 5 to prevent wear and damage caused by the bulk material contained in the bucket 2's storage section 3 rubbing or rolling. It is practically difficult to keep the radially outer surface of the stator 5 in contact with the radially inner surface of the bucket wheel's storage section 3 (=bucket wheel 1) of the bucket 2. Therefore, a gap d of a predetermined size is formed between the bucket 2's storage section 3 (=bucket wheel 1) and the stator 5 (liner member 42) (the figure is schematic).

[0019] In this embodiment, side covers 6 are attached to both sides of the stator 5 in the direction of the bucket wheel axis, so as to face both sides of the bucket wheel axis direction of the bucket 2's housing portion 3 (=bucket wheel 1). These side covers 6 are intended to restrict the flow of loose material spilled from the bucket 2's housing portion 3 (essentially the ring-shaped plate member 31 of the bucket wheel 1) from falling from both ends of the stator 5 in the direction of the bucket wheel axis. Liner members 43 are attached to the inner surface of the side cover 6 in the direction of the bucket wheel axis to prevent wear and damage caused by loose material rubbing or rolling. In this embodiment, the distance between the inner surface of the side cover 6 (liner member 43) in the direction of the bucket wheel axis and both sides of the bucket 2 (=bucket wheel 1) in the direction of the bucket wheel axis is set to be 10 times or more the dimension of the gap d between the bucket 2's housing portion 3 and the stator 5. This prevents loose material spilled from bucket 2 (=bucket wheel 1) from being compressed between the side cover 6 (liner member) and bucket 2.

[0020] The bucket wheel 1 is rotatably supported by a roller 7 disposed radially inward of the bucket wheel. Fig. 2b shows the support structure of the bucket wheel 1 by the roller 7. Arm members 53 that bend radially inward (= downward) of the bucket wheel are protruding from both side surfaces in the axial direction of the bucket wheel of the bucket wheel 1, and a rail member 44 is attached to the radially inner end of the arm member 53. This rail member 44 is a ring-shaped member that is concentric with the bucket wheel 1 and continuous in the circumferential direction. On the other hand, a roller support frame 45 is attached to a beam member 54 shown by a two-dot chain line in Fig. 1, a bearing-shaped roller support mechanism 46 is provided on this roller support frame 45, and the roller 7 is rotatably supported by this roller support mechanism 46. Then, by mounting the rail member on the roller 7, the bucket wheel 1 is rotatably supported by the roller 7.

[0021] In this embodiment, as shown by a broken line in Fig. 2b, an opening 8 is provided in a member located below the roller 7 such as the roller support mechanism 46 and the roller support frame 45. This opening 8 penetrates the lower support portion and the roller support frame 45 and is open to the bottom. For example, as can also be inferred from Fig. 1, the debris spilled from the bucket 2 (bucket wheel 1) also falls onto the roller support mechanism 46. When debris accumulates on the roller support mechanism 46, the debris is squeezed between the roller 7 and the roller support mechanism 46, restricting the rotation of the roller 7. When the rotation of the roller 7 is restricted, the load on the electric motor that rotationally drives the bucket wheel 1 (reclaimer) increases, and the power consumption increases. By forming an opening 8 that penetrates downward in the member located below the roller 7, the debris that has fallen onto the roller support mechanism 46 can be dropped to the bottom, thereby avoiding the debris from being squeezed between the roller 7 and the lower support portion.

[0022] In this embodiment, the ratio of the height (bucket wheel diameter direction dimension) H of the inlet 4 of the bucket 2 shown in FIG. 2b to the depth (bucket wheel circumferential direction dimension) L of the accommodating portion 3 shown in FIG. 2a is defined as 1.65 > L / H ≥ 1.15. As described above, in order to improve the payout efficiency of the bulk goods by the recliner, when increasing the capacity of the accommodating portion 3 of the bucket 2, the height H of the inlet 4 and the depth L of the accommodating portion 3 may be increased. However, when 1.65 ≤ L / H, the depth L of the accommodating portion 3 is too large with respect to the height H of the inlet 4, and when scraping the bulk goods, voids are formed in the accommodating portion 3 and the accommodation efficiency decreases. On the other hand, when L / H < 1.15, the height H is too large with respect to the depth L, and the operating energy (power consumption) of the recliner (bucket wheel 1) increases. In this embodiment, by defining L / H as 1.65 > L / H ≥ 1.15, it is possible to optimize the balance between the accommodation efficiency of the bulk goods and the operating energy (power consumption) of the recliner.

[0023] However, in order to ensure the number of buckets 2 that can be mounted on the bucket wheel 1, it is necessary to define the upper limit of the depth of the bucket 2. FIG. 3 is an explanatory view extracted from the mounting state of the bucket 2 on the bucket wheel 1. In the figure, if the outer diameter of the bucket wheel 1 is D, the chord length between the buckets 2 at the outer diameter position of the bucket wheel 1 is G, the angle formed by adjacent buckets 2 with respect to the center of the bucket wheel 1 is θ, and the number of buckets 2 is x, then G = 2 × D / 2 × sin θ / 2 = D·sin θ / 2 θ = 2π / x Therefore, G is as follows. G = D·sin π / x

[0024] If the depth L of the bucket 2 is not smaller than the chord G without considering the scooping portion 38 and the restricting portion 39, the required number x of the buckets 2 cannot be mounted on the bucket wheel 1. Therefore, the depth L of the bucket 2 L < D·sin π / x needs to be.

[0025] Thus, in this embodiment of the reclaimer bucket 2 and reclaimer, the ratio of the height H of the intake port 4 to the depth L of the storage section 3 is defined as 1.65 > L / H ≥ 1.15. This makes it possible to optimize the balance between the bulk material storage efficiency and the operating energy (power consumption) of the reclaimer. Furthermore, side covers 6 are provided facing both sides of the bucket 2, and the distance between the inner surface of these side covers 6 (liner members 43) and the side of the bucket 2 is set to be 10 times or more the gap d between the stator 5 and the bucket 2. This prevents the loose material spilled from the bucket 2 from being packed onto the outer surface of the stator 5, thereby avoiding the waste of operating energy (power consumption) associated with the rotation of the reclaimer, especially the bucket wheel 1.

[0026] Furthermore, an opening 8 that penetrates downward is provided in a member located below the roller 7, which rotatably supports the bucket wheel 1 from the radially inward direction. This prevents the bulk material spilled from the bucket 2 from being compressed between the roller 7 and the lower support, thereby avoiding the waste of operating energy (power consumption) associated with the rotation of the reclaimer, particularly the bucket wheel 1.

[0027] Although the bucket 2 and reclaimer of the embodiment have been described above, the present invention is not limited to the configuration described in the above embodiment, and various modifications are possible within the scope of the gist of the present invention. For example, in order to facilitate the replacement of components that have been worn or damaged due to collision or rolling of bulk materials, fasteners such as bolts and nuts that fasten them together may be covered and protected with individual covers. [Explanation of Symbols]

[0028] 1 Bucket Wheel 2 buckets 3. Storage area 4. Intake 5 status 6 Side Covers 7 Laura 8 openings

Claims

1. A reclaimer in which a plurality of buckets for scraping stacked bulk material into a storage section from an intake opening are attached in the circumferential direction of the bucket wheel, A reclaimer is provided with side covers such that the inner surface of the bucket is positioned at a distance of 10 times or more from both sides of the bucket wheel axial direction of the bucket, relative to the gap between the bucket and a stator disposed radially inward of the bucket wheel, opposite to the opening on the inner side of the bucket wheel radially in the bucket housing section.

2. A reclaimer in which a plurality of buckets for scraping stacked bulk material into a storage section from an intake opening are attached in the circumferential direction of the bucket wheel, A reclaimer having a downward-penetrating opening in a member located below a roller that rotatably supports the bucket wheel from the inside in the radial direction of the bucket wheel.

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