Bucket of reclaimer and 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 reclaimer bucket and a reclaimer that are attached in multiple numbers in the circumferential direction of a bucket wheel and scrape loaded loose material from an intake port into a storage section. [Background technology]

[0002] A reclaimer is used to discharge bulk materials such as iron ore, coal, and lime that are piled up in a yard to a yard conveyor. The reclaimer rotates a bucket wheel to which multiple buckets are attached in a circumferential direction in a predetermined direction, so that the piled bulk materials are stored in a storage section through the inlet of each bucket and scraped off. The piled bulk materials are scraped off when the bucket on the outer periphery of the bucket wheel is located at the bottom, and when the bucket is moved to the top, the bulk materials in the storage section fall under their own weight and are discharged to the yard conveyor. An example of such a reclaimer bucket is described in Patent Document 1 below. This bucket has a water drain opening near the inlet of the radial outer plate member of the bucket wheel, which becomes the bottom of the storage section when scraping up the bulk materials, and a long weir is provided in the axial direction of the bucket wheel at a position deeper in the storage section than that. This reclaimer bucket can effectively suppress the slippage of the bulk materials on the inclined yard conveyor by reducing the amount of water in the puddle of the yard that is scooped up together with the bulk materials. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-111393 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in order to improve the efficiency of discharging bulk materials by the reclaimer, for example, it is possible to increase the amount of bulk materials stored in each bucket, that is, the capacity of the storage section of the bucket. When increasing the capacity of the storage section of the bucket, the bucket wheel axial dimension of the bucket is fixed. Therefore, in order to increase the capacity of the storage section, it is sufficient to increase the bucket wheel radial dimension (height) of the intake port and the bucket wheel circumferential dimension (depth) of the storage section. However, if the depth of the bucket storage section is increased, there is a risk that the entire amount of bulk materials in the storage section cannot be accommodated in one scraping (inefficiency is poor). In addition, if the depth of the bucket storage section is too large, the number of buckets that can be attached to the bucket wheel is reduced, and the discharging efficiency of the bulk materials is reduced. On the other hand, if the height of the bucket is increased, there is a trade-off in that the resistance to scraping bulk materials increases, and the operating energy of the reclaimer, specifically the power consumption, increases. Therefore, there is room for consideration on the balance between the storage efficiency of bulk materials in each bucket and the operating energy (power consumption) of the reclaimer.

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

[0006] In order to achieve the above object, a reclaimer bucket according to one embodiment of the present invention is a reclaimer bucket that is attached in multiple units in the circumferential direction of a bucket wheel and scrapes loaded loose material from an intake opening into a storage section, wherein the ratio of a radial dimension (height) H of the bucket wheel at the intake opening to a circumferential dimension (depth) L of the bucket wheel at the storage section satisfies 1.65>L / H≧1.15.

[0007] Further, a reclaimer according to one aspect of the present invention is characterized in that in a reclaimer provided with the above-described bucket, a side cover is provided with respect to a gap between the bucket and a stator disposed radially inward of the bucket wheel facing an open portion on the radially inner side of the bucket wheel of a accommodating portion of the bucket, such that an inner side surface of the stator is positioned at a distance 10 times or more of the gap from both side surfaces of the bucket in the axial direction of the bucket wheel.

[0008] Further, a reclaimer according to one aspect of the present invention is characterized in that, in a reclaimer provided with the above-described bucket, an opening penetrating downward is provided in a member located below a roller that rotatably supports the bucket wheel from inside in a radial direction of the bucket wheel. Effect of the Invention

[0009] According to the reclaimer bucket of the present invention, the ratio of the height H of the intake port to the depth L of the storage section is set to 1.65>L / H≧1.15, which makes it possible to optimize the balance between the storage efficiency of the bulk materials and the operating energy (power consumption) of the reclaimer. In other words, when 1.65≦L / H, the depth L is too large compared to the height H, and when scraping the bulk materials, a gap is created in the storage section, reducing the storage efficiency. On the other hand, when L / H<1.15, the height H is too large compared to the depth L, and the operating energy (power consumption) of the reclaimer increases.

[0010] In addition, since it is possible to prevent loose material spilled from the bucket from being packed onto the outer peripheral surface of the stator, it is possible to avoid waste of operating energy (power consumption) associated with the rotation of the reclaimer, particularly the bucket wheel. In addition, since it is possible to prevent loose material spilling from the bucket from becoming packed between the rollers and the lower support, it is possible to avoid waste of operating energy (power consumption) associated with the rotation of the reclaimer, particularly the bucket wheel. [Brief description of the drawings]

[0011] [Figure 1]FIG. 1 is a front view showing a schematic configuration of an embodiment of a bucket wheel using a bucket of a reclaimer according to the present invention. [Diagram 2] FIG. 2 is a detailed explanatory diagram of a bucket and rollers of the reclaimer of FIG. 1. [Diagram 3] FIG. 13 is an explanatory diagram defining the upper limit of the depth of the bucket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] An embodiment of the reclaimer bucket and reclaimer of the present invention will be described in detail below with reference to the drawings. The embodiment shown below is an example of an apparatus and method for embodying the technical idea of ​​the present invention, and the technical idea of ​​the present invention does not specify the material, shape, structure, arrangement, etc. of the components to the embodiment described below. In addition, the drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the planar dimensions, the ratio, etc. are different from the actual ones, and the drawings include parts where the relationship and ratio of the dimensions are different from each other.

[0013] FIG. 1 is a schematic front view of a bucket wheel 1 showing an embodiment of a reclaimer bucket and a reclaimer. The left half of the bucket wheel 1 shown in FIG. 1 shows a cross section of a bucket 2 described later. The bucket wheel 1 is used with the upper part of the figure facing upward. In this embodiment, a plurality of buckets 2, in this example 12 buckets 2, are attached along the outer periphery of the bucket wheel 1 which is generally ring-shaped. As described above, bulk materials piled in the yard are scraped off when the bucket 2 on the outer periphery of the bucket wheel 1 is located at the lower part (lowest part). 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 part, the bulk materials in the storage section 3 fall into the chute 51 by their own weight and are discharged to the yard conveyor 52. The bucket wheel 1 is configured by arranging two ring-shaped plate members 31 in parallel in the direction perpendicular to the paper surface and connecting them to each other (by the bucket 2 or the like).

[0014] As shown by a dashed-dotted circle (pitch circle) in the figure, teeth that mesh with a chain are continuously arranged in the circumferential direction on this bucket wheel 1, and the bucket wheel 1 as a whole constitutes one driven sprocket 32. Meanwhile, a drive sprocket 33 is arranged at the upper end position of the bucket wheel 1, and tension sprockets 34 are arranged slightly below on both the left and right sides in the figure. A chain 35 wound around the drive sprocket 33 and tension sprocket 34 meshes with the driven sprocket 32 ​​of the bucket wheel 1. Therefore, when the drive sprocket 33 is driven to rotate by an electric motor (not shown), the bucket wheel 1 rotates in a predetermined direction (clockwise in the figure) in conjunction with the rotation of the chain 35. This rotation direction of the bucket wheel 1 is defined as the scraping direction.

[0015] The details of the shape of the bucket 2 will be described later. In this embodiment, since the clockwise direction is the scraping direction, the bucket 2 is attached to the bucket wheel 1 so that the left side of the figure at the bottom and the right side of the figure at the top are the inlet 4 of each bucket 2. The bucket 2 is intended to scrape off bulk materials piled up in the yard and store them to the back of the storage section 3, so the form will be described using the bucket 2 at the bottom left of FIG. 1 as an example. The bucket 2 has a back plate portion 36 that is approximately curved and convex on the radially outward side of the bucket wheel so that the inlet 4 side is low and the back side (depth side) of the storage section 3 is gradually higher in order to scoop up bulk materials in the yard (ground) (see FIG. 2a). The back plate portion 36 may be formed by joining multiple flat plate members without any gaps. In addition to the back plate portion 36, the bucket 2 is provided with side plate portions 37 that close both ends of the back plate portion 36 in the bucket wheel axial direction, and these form the storage section 3 of the bucket 2.

[0016] The storage section 3 of the bucket 2 is continuous to the inside of the bucket wheel 1 (between the two ring-shaped plate members 31), so that the bulk materials are stored up to the inside of the bucket wheel 1. That is, in this embodiment, the inside of the bucket wheel 1 constitutes a part of the storage section 3 of the bucket 2. Therefore, a liner (lining) member 40 is attached to the inside of the bucket wheel 1 (the inner surface of the opposing ring-shaped plate members 31) to suppress wear and damage caused by collision and rolling of the bulk materials. The inside of the storage section 3 of the bucket 2 (= the bucket wheel 1) in the radial direction of the bucket wheel is open. In addition, from the intake port 4 of the bucket 2, a plate-shaped scooping section 38 and a regulating section 39 are extended outward toward the scraping direction, and among them, the scooping section 38 is connected to the back plate section 36, and the regulating section 39 is connected to the side plate section 37.

[0017] As described above, the bulk material is scraped off when the bucket 2 is at the bottom and discharged when it is at the top, and in this embodiment, the scraping direction is clockwise. Therefore, bulk material is stored in the accommodation section 3 of the bucket 2 (including the inside of the bucket wheel 1) only in the left half of FIG. 1. Also, the radially inner side of the accommodation section 3 of the bucket 2 (= the bucket wheel 1) is open. Therefore, a stator 5 that covers the opening on the radially inner side of the bucket wheel of the accommodation section 3 of the bucket 2 (= the bucket wheel 1) is provided on the radially inner side of the bucket wheel 1 in the left half of the figure. This stator 5 is a restricting member that restricts the bulk material in the accommodation section 3 of the bucket 2 from spilling out from the opening on the radially inner side of the bucket wheel, and is disposed so as to cover the surface that is the radially inner side of the bucket wheel 1.

[0018] FIG. 2b shows a cross section of the stator 5. The stator 5 itself as a bulk object control member is a plate member having a cross section of an arc shape that is convex on the radially outer side of the bucket wheel. A liner (inner lining) member is attached to the radially outer side surface of the stator 5 to prevent wear and damage caused by rubbing and rolling of the bulk objects stored in the storage section 3 of the bucket 2. It is practically difficult to keep the radially outer side surface of the stator 5 in contact with the radially inner side surface of the bucket wheel of the storage section 3 of the bucket 2 (= the bucket wheel 1). Therefore, a gap d of a predetermined dimension is formed between the storage section 3 of the bucket 2 (= the 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 bucket wheel axial direction so as to face both sides of the bucket wheel axial direction of the accommodation section 3 (= bucket wheel 1) of the bucket 2. The side covers 6 are intended to prevent loose objects spilled from the accommodation section 3 of the bucket 2 (substantially the ring-shaped plate member 31 of the bucket wheel 1) from falling from both ends of the stator 5 in the bucket wheel axial direction. A liner (inner lining) member 43 is attached to the inner side surface of the side cover 6 in the bucket wheel axial direction to prevent wear and damage caused by rubbing and rolling of loose objects. In this embodiment, the distance between the inner side surface of the side cover 6 (liner member 43) in the bucket wheel axial direction and both sides of the bucket 2 (= bucket wheel 1) in the bucket wheel axial direction is set to be 10 times or more the dimension of the gap d between the accommodation section 3 of the bucket 2 and the stator 5. This makes it possible to prevent loose objects spilled from the bucket 2 (=bucket wheel 1) from being packed in between the side cover 6 (liner member) and the bucket 2.

[0020] The bucket wheel 1 is rotatably supported by rollers 7 disposed on the radially inner side of the bucket wheel. FIG. 2b shows a support structure of the bucket wheel 1 by the rollers 7. Arm members 53 that are bent radially inward (= downward) of the bucket wheel are protruded from both side surfaces of the bucket wheel 1 in the bucket wheel axial direction, and a rail member 44 is attached to the inner end of the arm member 53 in the bucket wheel radial direction. The rail member 44 is a ring-shaped member that is concentric with the bucket wheel 1 and continues in the circumferential direction. Meanwhile, a roller support frame 45 is attached to a beam member 54 shown by a two-dot chain line in FIG. 1, and a roller support mechanism 46 having a bearing shape is provided on the roller support frame 45, and the roller 7 is rotatably supported by the roller support mechanism 46. The rail members are mounted on the rollers 7, so that the bucket wheel 1 is rotatably supported by the rollers 7.

[0021] In this embodiment, as shown by the dashed line in FIG. 2b, an opening 8 is provided in a member located below the roller 7, such as the roller support mechanism 46 or the roller support frame 45. This opening 8 penetrates the lower support portion and the roller support frame 45 and opens downward. For example, as can be inferred from FIG. 1, loose materials spilled from the bucket 2 (bucket wheel 1) also fall onto the roller support mechanism 46. When loose materials are piled up on the roller support mechanism 46, the loose materials are packed between the roller 7 and the roller support mechanism 46, and the rotation of the roller 7 is restricted. When the rotation of the roller 7 is restricted, the load on the electric motor that rotates the bucket wheel 1 (reclaimer) increases, and power consumption increases. By forming an opening 8 penetrating downward in a member located below the roller 7, the loose materials that have fallen onto the roller support mechanism 46 can be dropped downward, and this makes it possible to prevent the loose materials from being packed between the roller 7 and the lower support portion.

[0022] In this embodiment, the ratio of the height H (diameter dimension of the bucket wheel) of the intake 4 of the bucket 2 shown in FIG. 2b to the depth L (circumferential dimension of the bucket wheel) of the storage section 3 shown in FIG. 2a is set to 1.65>L / H≧1.15. As described above, in order to increase the capacity of the storage section 3 of the bucket 2 in order to improve the efficiency of discharging the bulk materials by the reclaimer, the height H of the intake 4 and the depth L of the storage section 3 may be increased. However, when 1.65≦L / H, the depth L of the storage section 3 is too large compared to the height H of the intake 4, and when scraping the bulk materials, a gap is formed in the storage section 3, and the storage efficiency decreases. On the other hand, when L / H<1.15, the height H is too large compared to the depth L, and the operating energy (power consumption) of the reclaimer (bucket wheel 1) increases. In this embodiment, by setting L / H to 1.65>L / H≧1.15, it is possible to optimize the balance between the storage efficiency of the bulk materials and the operating energy (power consumption) of the reclaimer.

[0023] However, in order to ensure the number of buckets 2 that can be attached to the bucket wheel 1, it is necessary to specify an upper limit for the depth of the bucket 2. Fig. 3 is an explanatory diagram extracting a state in which the buckets 2 are attached to the bucket wheel 1. In the figure, if the outer diameter of the bucket wheel 1 is D, the length of the chord between the buckets 2 at the outer diameter position of the bucket wheel 1 is G, the angle that adjacent buckets 2 make 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 × sinθ / 2 = D sinθ / 2 θ=2π / x So, G is as follows: G=D·sinπ / x

[0024] If the depth L of the bucket 2 is not smaller than the chord G in the maximum dimension not considering the scooping portion 38 and the regulating portion 39, the required number x of buckets 2 cannot be attached to the bucket wheel 1. Therefore, the depth L of the bucket 2 is L <D·sinπ / x It needs to be.

[0025] In this manner, in the reclaimer bucket 2 and the reclaimer of this embodiment, the ratio of the height H of the intake port 4 to the depth L of the storage section 3 is set to 1.65>L / H≧1.15. This makes it possible to optimize the balance between the storage efficiency of the bulk material and the operating energy (power consumption) of the reclaimer. In addition, side covers 6 are provided to face both side surfaces of the bucket 2, and the distance between the inner surface of this side cover 6 (liner member 43) and the side surface of the bucket 2 is set to 10 times or more the gap d between the stator 5 and the bucket 2. This makes it possible to prevent the bulk material spilled from the bucket 2 from being packed onto the outer circumferential surface of the stator 5, thereby avoiding waste of operating energy (power consumption) associated with the rotation of the reclaimer, particularly the bucket wheel 1.

[0026] In addition, an opening 8 penetrating downward is provided in a member located below the roller 7 that rotatably supports the bucket wheel 1 from the radially inside. This makes it possible to prevent the bulk material spilled from the bucket 2 from being packed in between the roller 7 and the lower support part, thereby making it possible to avoid waste of operating energy (power consumption) associated with the rotation of the reclaimer, particularly the bucket wheel 1.

[0027] Although the bucket 2 of the reclaimer and the reclaimer according to 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 replacement of parts that have become worn or damaged due to collision or rolling of loose objects, the fasteners that fasten them, such as bolts and nuts, may be protected by covering them with individual covers. [Explanation of symbols]

[0028] 1 Bucket Wheel 2 Buckets 3. Storage section 4 Intake port 5 Stator 6 Side cover 7. Lola 8 Openings

Claims

1. In a reclaimer bucket, a plurality of buckets are attached in the circumferential direction of a bucket wheel and scrape off loaded loose material from an intake port into a storage section, A reclaimer bucket, wherein a ratio of a bucket wheel radial dimension H of the intake port to a bucket wheel circumferential dimension L of the accommodation portion satisfies 1.65>L / H≧1.

15.

2. 2. A reclaimer provided with a bucket according to claim 1, a side cover is provided in the reclaimer such that an inner surface of the side cover is located at a distance of 10 times or more of the gap between the bucket and a stator disposed radially inward of the bucket wheel facing an open portion of the accommodation portion of the bucket on the radially inner side of the bucket wheel, the side cover being provided in the reclaimer such that the inner surface of the side cover is located at a distance of 10 times or more of the gap from both side surfaces of the bucket in the axial direction of the bucket wheel.

3. 2. A reclaimer provided with a bucket according to claim 1, a reclaimer, the reclaimer comprising: a member located below a roller that rotatably supports the bucket wheel from inside in a radial direction of the bucket wheel, the member having an opening penetrating downwardly.

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