Conveying pipe and conveying device

Abstract

To provide a conveying device capable of facilitating replacement of components inside a conveying pipe and improving the maintainability of an inner peripheral surface of the conveying pipe.SOLUTION: A conveying device according to one embodiment conveys a material for constructing an embankment, and is disposed along a slope. The conveying device includes: a conveying pipe 10 that has a plurality of blades 50 on an inner peripheral surface 60b and is rotatable; rollers that contact an outer peripheral surface 10b of the conveying pipe 10 to rotatably support the conveying pipe 10; and a flange 101 that protrudes from the inner peripheral surface 60b located inward in a radial direction D4 in a portion P of the conveying pipe 10 which contacts the rollers of the conveying pipe 10. The flange 101 has a through hole 104 penetrating in a direction intersecting a radial direction D4 of the conveying pipe 10, and a part of the plurality of blades 50 is fixed by fixing means 105 penetrating through the through hole 104.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a conveying pipe and a conveying device for conveying materials such as concrete. [Background technology]

[0002] Patent Document 1 describes a conveying device that conveys concrete from the upper part to the lower part of a slope. This conveying device includes multiple conveying pipes arranged along the slope and multiple driving sources that rotate each of the multiple conveying pipes. Multiple blades are fixed to the inner surface of the conveying pipes. Concrete is poured into the conveying pipes via a hopper and a conveyor, and is conveyed to the lower part of the slope while being mixed and stirred by the multiple blades inside the rotating conveying pipes.

[0003] Patent Documents 2 and 3 describe a conveying device equipped with a conveying pipe for conveying concrete, etc. The conveying pipe conveys concrete diagonally downward while mixing the concrete. The conveying pipe includes three pipes. The pipes are equipped with flanges and rings for receiving thrust loads. The conveying device is equipped with a conveying pipe rotation drive unit. The conveying pipe rotation drive unit includes standing legs erected on the side frames of the support base, horizontal members attached to the upper ends of the standing legs, a motor mounting base arranged on the horizontal member, a motor with a variable speed reducer, and a roller chain that transmits the rotational driving force of the motor to the conveying pipe. The conveying pipe rotates when the rotational driving force of the motor is transmitted to the conveying pipe via the roller chain. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-260624 [Patent Document 2] Japanese Patent Application Publication No. 11-303400 [Patent Document 3] Japanese Patent Application Publication No. 11-303396 Summary of the Invention [Problem to be solved by the invention]

[0005] In each of the above-mentioned conveying devices, materials are introduced into a conveying pipe having a plurality of blades on its inner surface, and the conveying pipe rotates to mix and stir the materials while conveying them inside the conveying pipe. However, maintenance is required for components fixed to the inner surface of the conveying pipe, such as the blades. For example, blades and the like may deteriorate over long periods of use, and therefore, periodic replacement may be desirable. Therefore, there is a need for a system that allows for easy replacement of components on the inner surface of the conveying pipe and improves the maintainability of the inner surface of the conveying pipe.

[0006] The present disclosure aims to provide a conveying pipe and a conveying device that allows for easy replacement of internal parts of the conveying pipe and improves the maintainability of the inner surface of the conveying pipe. [Means for solving the problem]

[0007] A conveying pipe in one embodiment of the present disclosure is a conveying pipe for conveying materials for constructing a dam body, which is arranged at an angle, has a plurality of blades on its inner surface, and is rotatable, and the outer surface of the conveying pipe is in contact with rollers, and the conveying pipe is supported by the rollers so that it can rotate freely.The conveying pipe includes an outer pipe which is a steel pipe, a plurality of lining materials which are detachably arranged on the inner surface of the outer pipe, and a fixing structure which fixes the blades to the inner surface of the conveying pipe, and some of the lining materials are arranged so as to sandwich the fixing structure on both sides of the axial direction of the conveying pipe.

[0008] The aforementioned fixing structure may include a flange protruding from the inner circumferential surface.

[0009] The conveying device according to the present disclosure includes the conveying pipe described above. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to easily replace internal parts of the conveying pipe and improve the maintainability of the inner surface of the conveying pipe. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of a site where a conveying device according to an embodiment is applied. [Figure 2] 2 is a side view showing the conveying pipe of the conveying device of FIG. [Figure 3] 3 is a side view showing the conveying pipe and rollers of the conveying device of FIG. 2. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a diagram schematically showing a plurality of blades arranged on the inner circumferential surface of the transfer pipe of FIG. [Figure 6] FIG. 6 is a view showing the inner circumferential surface of the transfer pipe of FIG. 3 in a developed form, illustrating a plurality of lining materials and blades arranged on the inner circumferential surface. [Figure 7] 7(a) and 7(b) are perspective views showing the lining material of FIG. [Figure 8] Fig. 8(a) is a cross-sectional view showing the flange, blades and fixing means fixed to the inner circumferential surface of the conveying pipe of Fig. 3. Fig. 8(b) is a cross-sectional view showing the blades arranged on the inner circumferential surface of the conveying pipe of Fig. 3 and fixing means penetrating the conveying pipe. [Figure 9] FIG. 9 is a cross-sectional view showing blades arranged on the inner circumferential surface of the conveying pipe of FIG. 3 and fixing means according to a modified example. [Figure 10] FIG. 10 is a cross-sectional view showing a fixing means for fixing the lining material to the conveying pipe. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of a conveying device according to the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, identical or corresponding elements are designated by the same reference numerals, and duplicate explanations will be omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated to facilitate understanding, and the dimensional proportions and the like are not limited to those shown in the drawings.

[0013] In this disclosure, "levee body" refers to the main body of a dam or embankment. "Materials for constructing the levee body" refers to the fill materials that form the levee body. "Materials for constructing the levee body" refers to, for example, soil-based materials, soil-based materials with added cement, or concrete. "Materials for constructing the levee body" may include cement or excavated soil with adjusted grain size. The conveying device 1 according to this embodiment conveys material M for constructing the levee body along a slope S.

[0014] FIG. 1 shows an exemplary site A having a slope S on which the conveying device 1 according to this embodiment is used. The site A is, for example, a dam construction site. The slope S of the site A does not have a constant gradient, but includes steep and gentle slopes. The conveying device 1 includes, for example, a plurality of conveying pipes 10 that convey material M for constructing a dam body and are arranged at an incline along the slope S, a plurality of conveying pipe support members 20 that support the plurality of conveying pipes 10, and a plurality of support columns 30 that are interposed between the plurality of conveying pipe support members 20 and the slope S. Each of the plurality of support columns 30 is arranged between the conveying pipe support member 20 that extends diagonally in a straight line and the slope S, which has a varying gradient. Therefore, the lengths of the plurality of support columns 30 differ from one another depending on the gradient of the slope S.

[0015] The conveying device 1 may include a hopper 2 above a plurality of conveying pipes 10, which receives material M, and a conveyor 3 extending from below the hopper 2 toward the conveying pipes 10. For example, material M is fed into the hopper 2 from a truck T located above a slope S, and the material M fed into the hopper 2 is transported to the conveying pipes 10 by the conveyor 3.

[0016] The material M is fed from the conveyor 3 into the inside of the conveying pipe 10 located at the upper end, and the material M fed into the inside of the conveying pipe 10 is transported diagonally downward while being oscillated. Each of the multiple conveying pipes 10 is rotatable in the circumferential direction of the conveying pipe 10 (around the axis of the conveying pipe 10), and as each conveying pipe 10 rotates, the material M is oscillated and moves diagonally downward. This prevents material separation of the material M. The material M is then discharged from the lower end 10x of the conveying pipe 10 and loaded, for example, into a dump truck D.

[0017] FIG. 2 is an enlarged side view of the connection portion of two conveying pipes 10. As shown in FIGS. 1 and 2, for example, the multiple conveying pipes 10 are not fixed to each other but are arranged in a nested manner. The conveying pipe 10 includes, for example, a first conveying pipe unit 10A located at the uppermost end and a second conveying pipe unit 10B connected to the lower part of the first conveying pipe unit 10A. The first conveying pipe unit 10A and the second conveying pipe unit 10B are connected to each other by, for example, joining a flange 10c located at the lower end of the first conveying pipe unit 10A and a flange 10d located at the upper end of the second conveying pipe unit 10B to each other with bolts and nuts.

[0018] The first conveying pipe unit 10A includes a flange portion 11 that receives the adjacent conveying pipe 10 diagonally above, a first support portion 12 that rotatably supports the first conveying pipe unit 10A, and a second support portion 13 that supports the flange portion 11. The second conveying pipe unit 10B includes a third support portion 14 that rotatably supports the second conveying pipe unit 10B. The second conveying pipe unit 10B may include one third support portion 14 or multiple third support portions 14.

[0019] The exemplary flange portion 11 has a first enlarged diameter portion 11b that enlarges in diameter from the outer circumferential surface 10b of the conveying pipe 10, a second enlarged diameter portion 11c that receives the upper conveying pipe 10, and a recessed portion 11d that reduces in diameter between the first enlarged diameter portion 11b and the second enlarged diameter portion 11c. At this time, the lower end of the upper conveying pipe 10 is inserted into the flange portion 11 of the lower conveying pipe 10.

[0020] The first support portion 12 includes, for example, rollers 12b that rotatably support the first conveying pipe unit 10A. Furthermore, the first support portion 12 may include a rotational drive portion that rotates the conveying pipe 10. In this case, the rotational drive portion includes a chain that is wound around the conveying pipe 10, a sprocket around which the chain is wound outside the conveying pipe 10, and a motor that supplies rotational drive force to the sprocket, and the conveying pipe 10 rotates when the rotational drive force of the motor is transmitted to the sprocket, the chain, and the conveying pipe 10.

[0021] The second support portion 13 is, for example, a support member with a roller. Specifically, the second support portion 13 includes a thrust-receiving roller 13b that functions as a thrust bearing for the flange portion 11, and a roller support portion 13c that rotatably supports the thrust-receiving roller 13b. The roller support portion 13c includes, for example, two steel members 13d aligned along the axial direction D1 of the conveying pipe 10. The roller support portion 13c is a portion that supports the thrust-receiving roller 13b from diagonally below (below in the inclination direction), and is, for example, composed of the steel member 13d. The steel members 13d are plate-shaped and arranged to be aligned along the axial direction D1 diagonally below (below in the inclination direction) the thrust-receiving roller 13b. The conveying pipe support beam member 20 (first support beam member 20A) is a beam member to which the roller support portion 13c (steel member 13d) is fixed, and extends along the axial direction D1 below the roller support portion 13c. The transport pipe support beam member 20 (first support beam member 20A) is inclined.

[0022] 3 is a side view showing one conveying pipe 10. As shown in FIGS. 2 and 3, for example, the conveying pipe 10 includes one first conveying pipe unit 10A and three second conveying pipe units 10B. However, the number of first conveying pipe units 10A and second conveying pipe units 10B is not particularly limited. For example, the length L2 of the second conveying pipe unit 10B is the same as the length L1 of the first conveying pipe unit 10A, but may be different from the length L1 of the first conveying pipe unit 10A.

[0023] The length L1 of the first conveying pipe unit 10A and the length L2 of the second conveying pipe unit 10B are, for example, 1.0 m or more and 3.0 m or less. However, the length L1 of the first conveying pipe unit 10A and the length L2 of the second conveying pipe unit 10B may be 1.5 m, 2.0 m, or 2.5 m. As an example, the lengths L1 and L2 are 3.0 m, and the length of the conveying pipe 10 is 12 m.

[0024] The conveying pipe support member 20 comprises a first support member 20A facing the first conveying pipe unit 10A and a second support member 20B facing the second conveying pipe unit 10B. The first support member 20A and the second support member 20B are detachably joined to each other. As an example, the first support member 20A and the second support member 20B are H-beams and are joined to each other by splice plates and high-strength bolts.

[0025] Figure 4 is a cross-sectional view taken along line AA in Figure 3. As shown in Figures 1, 3 and 4, the conveying device 1 includes, for example, a walkway 40 adjacent to a plurality of conveying pipes 10 and arranged along a slope S. As an example, the walkway 40 extends along the axial direction D1 of the conveying pipe 10 on one side of the width direction D2 of the conveying pipe 10.

[0026] The third support portion 14 includes, for example, a pair of rollers 14b that contact the outer peripheral surface 10b of the conveying pipe 10 and are aligned along the width direction D2, a pair of rotation support portions 14c that rotatably support each roller 14b, and a base portion 14d that supports the pair of rotation support portions 14c on the conveying pipe support beam material 20. The rollers 14b are, for example, impact rollers that rotatably support the second conveying pipe unit 10B.

[0027] The rotation support portion 14c includes, for example, a shaft portion 14f extending along the axial direction D1 and a bracket 14g fixed to the upper surface of the base portion 14d to hold the shaft portion 14f. The base portion 14d includes, for example, a steel member 14h fixed to the conveying pipe support beam member 20 and a fixing member 14j fixed to the upper portion of the steel member 14h and to which the bracket 14g is fixed. As an example, the base portion 14d includes a pair of steel members 14h aligned along the width direction D2, and the fixing member 14j extends in the width direction D2 to span the pair of steel members 14h.

[0028] A plate-shaped blade 50 is fixed inside the conveying pipe 10 to oscillate the material M being conveyed inside the conveying pipe 10. The blade 50 and a flange 101 (described later) are arranged on the inner circumferential surface 60b of the conveying pipe 10 so as to be inclined with respect to the axial direction D1 and the rotation direction D3 (see FIG. 6). The blade 50 is provided at one location on the inner circumferential surface 60b of the conveying pipe 10 in the circumferential direction, which is the rotation direction D3. The central angle θ of the blade 50 (see FIG. 4) is, for example, 75° to 90°, or 60° to 120°, or 135°. Inside the conveying pipe 10, the material M moves, for example, in the lower half region or the lower quarter region of the conveying pipe. As the conveying pipe 10 rotates, the blade 50 moves in the rotation direction D3 in the lower half region or the lower quarter region, contacting the material M and conveying the material M downward in the inclined direction. The blade 50 has, for example, a fan shape. As an example, the blade 50 has a first arc-shaped portion 51 fixed to an inner circumferential surface 60b of an outer tube 60 (described later) of the conveying pipe 10, a first straight portion 52 extending from one end of the first arc-shaped portion 51 in the rotation direction D3 toward the inside in the radial direction D4 of the conveying pipe 10, a second straight portion 53 extending from the other end of the first arc-shaped portion 51 in the rotation direction D3 toward the inside in the radial direction D4 of the conveying pipe 10, and a second arc-shaped portion 54 connecting the inner end of the first straight portion 52 in the radial direction D4 and the inner end of the second straight portion 53 in the radial direction D4 to each other.

[0029] Figure 5 is a schematic diagram showing the arrangement of multiple blades 50 inside the conveying pipe 10 (first conveying pipe unit 10A and second conveying pipe unit 10B). Figure 6 is a diagram showing the inside of the unfolded conveying pipe 10. As shown in Figures 5 and 6, for example, the conveying pipe 10 comprises an outer pipe 60, which is a steel pipe that constitutes the conveying pipe 10, and multiple lining materials 70 fixed to the inner surface 60b of the outer pipe 60.

[0030] The conveying pipe 10 has, for example, a plurality of blades 50 arranged along the axial direction D1. For example, each of the first conveying pipe unit 10A and the second conveying pipe unit 10B has four or more and five or less blades 50. However, the number of blades 50 is not particularly limited. For example, a plurality of lining materials 70 are laid on the inner circumferential surface 60b of the outer pipe 60. The lining materials 70 are provided to protect the inner circumferential surface 60b of the outer pipe 60.

[0031] For example, three or four lining materials 70 are arranged along the rotation direction D3 of the conveying pipe 10. Each lining material 70 is fixed to the inner surface 60b by a bolt 71 inserted from the outside of the outer pipe 60. Each lining material 70 is divided into three or four equal parts in the circumferential direction of the conveying pipe 10. It is also possible to reuse each lining material 70. The bolt 71 is inserted into a portion other than the portion P that contacts the roller 12b or roller 14b of the conveying pipe 10. The first conveying pipe unit 10A and the second conveying pipe unit 10B each have, for example, a plurality of lining materials 70 arranged along the axial direction D1.

[0032] The portion P indicates the portion that the roller 12b or the roller 14b contacts when the conveying tube 10 rotates while being supported by the rollers 12b and 14b. That is, the portion P indicates a ring-shaped portion that goes around the portion of the conveying tube 10 that the roller 12b or the roller 14b contacts at a certain point in time in the rotation direction D3 of the conveying tube 10.

[0033] As an example, the number of lining materials 70 arranged in the axial direction D1 in the first conveying pipe unit 10A and the second conveying pipe unit 10B is 4 or more and 5 or less. For example, the number of lining materials 70 provided in the first conveying pipe unit 10A is less than the number of lining materials 70 provided in the second conveying pipe unit 10B. However, the number of lining materials 70 in each of the first conveying pipe unit 10A and the second conveying pipe unit 10B can be changed as appropriate.

[0034] Fig. 7 shows an example of a lining material 70. As shown in Figs. 6 and 7, the lining material 70 has a rectangular plate shape that is curved in an arc shape so as to fit along the inner circumferential surface 60b of the outer pipe 60. The lining material 70 includes, for example, an arc-shaped iron plate 72 and a rubber plate 73 located inside the iron plate 72. The rubber plate 73 has inclined surfaces 73b located at each of the circumferential ends of the lining material 70.

[0035] The lining material 70 has holes 74 through which bolts 71 are inserted. The holes 74 penetrate the steel plate 72 and the rubber plate 73 in the plate thickness direction. The lining material 70 has, for example, four holes 74, and the four holes 74 are arranged at each of the four corners of the lining material 70. The lining material 70 is fixed to the inner circumferential surface 60b of the outer pipe 60 by inserting bolts 71 from the outside of the steel plate 72, which are inserted from the outside of the outer pipe 60, and then tightening the bolts 71 with nuts on the inside of the rubber plate 73.

[0036] The lining material 70 includes, for example, a plate-shaped first lining material 80 and a second lining material 90 including a pair of half members 91. As shown in FIG. 6, the second lining material 90, consisting of a pair of half members 91, is arranged at one location for each blade 50 arranged at one location in the circumferential direction. The first lining material 80 represents the lining material 70 that is not split into halves, and includes an arc-shaped steel plate 72, a rubber plate 73, and a hole 74. The second lining material 90 differs from the first lining material 80 in that it is formed as a pair of separate half members 91. The half members 91 have opposing surfaces 92 that are inclined with respect to the circumferential direction of the second lining material 90, and each opposing surface 92 faces the blade 50 in the axial direction D1. The second lining material 90 is fixed so that the pair of half members 91 sandwich the blade 50 from both sides in the axial direction D1. This makes it possible to attach the lining material 70 (second lining material 90) to the area where the blades 50 are to be provided.

[0037] 8(a) and 8(b) are cross-sectional views showing examples of fixing means for the blades 50 fixed to the inner circumferential surface 60b of the outer tube 60. As shown in Fig. 6, Fig. 8(a), and Fig. 8(b), the fixing structure of the blades 50 differs between a portion P that contacts the roller 12b or the roller 14b of the conveying tube 10 and a portion other than the portion P. For example, the blades 50 may include a plate-shaped first blade 50A and an L-shaped second blade 50B whose end portion in cross section is curved.

[0038] 8(a) is a cross-sectional view showing an exemplary fixing structure 100 for the blade 50 (first blade 50A) at a position P where the blade 50 comes into contact with the roller 12b or the roller 14b. As shown in FIG. 8(a), the fixing structure 100 includes a flange 101 protruding from the inner circumferential surface 60b at the position P, and fixing means 105 for fixing the blade 50 to the flange 101.

[0039] The flange 101 has, for example, a fixed portion 102 fixed to the inner peripheral surface 60b by welding, and a protruding portion 103 protruding from the fixed portion 102 inward in the radial direction D4 of the conveying pipe 10. For example, a through hole 104 is formed in the protruding portion 103, penetrating in a direction intersecting the radial direction D4, and a through hole 55 is formed in the first blade 50A, penetrating in the plate thickness direction of the first blade 50A.

[0040] The fixing means 105 includes a bolt 106 passing through the through hole 104 and the through hole 55, a nut 107 fastening the bolt 106 to the flange 101 and the blade 50, and a washer 108 interposed between the nut 107 and the blade 50. In this way, the bolt 106 is inserted into the through hole 104 of the flange 101 and the through hole 55 of the blade 50 and fastened with the nut 107, thereby fixing the blade 50 to the inner circumferential surface 60b of the conveying pipe 10. In this way, the blade 50 is fixed to the flange 101 welded to the inner circumferential surface 60b of the conveying pipe 10, so that there is no portion protruding outward from the portion P that contacts the roller 12b or the roller 14b of the conveying pipe 10.

[0041] 8(b) is a cross-sectional view showing an exemplary fixing structure 110 for the blade 50 (second blade 50B) at a location other than the location P where the roller 12b or the roller 14b contacts. As shown in FIG. 8(b), the fixing structure 110 includes a through hole 111 (second hole portion) that penetrates the conveying pipe 10 in the radial direction D4, and fixing means 115 that fixes the second blade 50B to the through hole 111. The second blade 50B has, for example, a main portion 56 that extends in the radial direction D4 of the conveying pipe 10, and a plate-shaped protruding portion 57 that protrudes from the end of the main portion 56 in the radial direction D4. The protruding portion 57 has a through hole 58 that penetrates in the plate thickness direction.

[0042] The fixing means 115 includes a bolt 116 passing through the through hole 111 and the through hole 58, a nut 117 fastening the bolt 116 to the conveying pipe 10 and the blade 50 (second blade 50B), and a washer 118 interposed between the nut 117 and the blade 50. The bolt 116 is inserted from the outside of the conveying pipe 10 through the through hole 111 and the through hole 58 of the blade 50 and fastened to the nut 117, thereby fixing the blade 50 to the inner circumferential surface 60b of the conveying pipe 10. Note that in the fixing structure 110, the head of the bolt 116 protrudes from the outer circumferential surface 10b of the conveying pipe 10. However, since the location where the fixing structure 110 is provided is a location other than the portion P, the head of the bolt 116 does not come into contact with the roller 12b or the roller 14b.

[0043] Furthermore, the fixing means for fixing the lining material 70 to the inner peripheral surface 60b is, for example, the same as the fixing means 115. In this case, as shown in Figure 10, the lining material 70 is fixed to the inner peripheral surface 60b of the conveying pipe 10 by inserting a bolt 71 into the through hole 111 and the hole portion 74 of the lining material 70 from the outside of the conveying pipe 10 and fastening it with a nut 76. Furthermore, a sealing material 77 may be arranged on the outside of the head of the bolt 71.

[0044] As shown in Figures 6 and 8(a), the second lining material 90 of the lining material 70 is fixed in a state in which it is positioned so as to sandwich the flange 101 of the fixing structure 100 described above from both sides in the axial direction D1. In the fixing structure of the lining material 70, as described above, the head of the bolt 71 protrudes from the outer peripheral surface 10b of the conveying pipe 10, but the fixing structure is provided at a location other than the portion P. Therefore, the head of the bolt 71 does not come into contact with the roller 12b or the roller 14b. Furthermore, the head of the bolt 71 or the nut 76 may protrude from the conveying pipe 10, in which case the bolt 71 or the nut 76 can be easily attached and detached.

[0045] Next, the effects of the conveying device 1 according to this embodiment will be described in detail. In the conveying device 1, the rotatable conveying pipe 10 has multiple blades 50 on its inner circumferential surface 60b, and rollers 12b and 14b contact the outer circumferential surface 10b of the conveying pipe 10 to rotatably support the conveying pipe 10. In the conveying device 1, a flange 101 protrudes from the inner circumferential surface 60b of the conveying device 1 in the radial direction D4, and the blades 50 are fixed to the inner circumferential surface 60b of the conveying pipe 10 via the flange 101 and fixing means 105. Therefore, the heads of the bolts 106 and other components can be prevented from protruding from the outer circumferential surface 10b of the conveying pipe 10, thereby avoiding interference with the rollers 12b and 14b. Furthermore, the blades 50 can be easily attached and detached from the flange 101 by fixing and unlocking using the fixing means 105. Therefore, parts such as the blades 50 inside the conveying pipe 10 can be easily replaced, and the maintainability of the inner circumferential surface 60b of the conveying pipe 10 can be improved. That is, since the blades 50 that have become worn out or the like can be easily replaced, maintenance of the conveying pipe 10 can be carried out easily and efficiently.

[0046] The conveying tube 10 may have a through hole 111 penetrating the conveying tube 10 in the radial direction D4 at a position other than the position P of the conveying tube 10 that contacts the rollers 12b, 14b, and some of the multiple blades 50 (e.g., the second blade 50B) may be fixed to the inner circumferential surface 60b by a fixing means 115 that penetrates the through hole 111. In this case, since the through hole 111 penetrating the conveying tube 10 in the radial direction D4 is provided at a position other than the position P of the conveying tube 10 that contacts the rollers 12b, 14b, interference of the fixing means 115 with the rollers 12b, 14b can be avoided. Furthermore, since fixing and release by the fixing means 115 can be performed from the outside of the conveying tube 10 in the radial direction D4, maintainability can be further improved.

[0047] The conveying pipe 10 may include an outer pipe 60, which is a steel pipe, and a plurality of lining materials 70 that are removably arranged on the inner surface 60b of the outer pipe 60, and some of the plurality of lining materials 70 (e.g., the second lining material 90) may be arranged so as to sandwich a flange 101 protruding from the inner surface 60b of the conveying pipe 10 from both sides in the axial direction D1 of the conveying pipe 10. In this case, the plurality of lining materials 70 that protect the inner surface 60b of the outer pipe 60 are removably arranged on the inner surface 60b, making it possible to easily replace the plurality of lining materials 70. Furthermore, some of the plurality of lining materials 70 are arranged so as to sandwich the flange 101 from both sides in the axial direction D1 of the conveying pipe 10. Therefore, even when the flange 101 is provided, the plurality of lining materials 70 can be easily attached and detached, thereby further improving the maintainability of the inner surface 60b of the conveying pipe 10.

[0048] The multiple lining materials 70 may be fixed to the inner surface 60b of the outer pipe 60 by bolts 71 inserted from the outside of the conveying pipe 10. In this case, the multiple lining materials 70 can be easily attached and detached from the outside of the conveying pipe 10. Therefore, the conveying device 1 can be made even easier to maintain.

[0049] The above describes an embodiment of the conveying device according to the present disclosure. However, the conveying device according to the present disclosure is not limited to the above embodiment, and may be modified or applied to other things within the scope of the gist described in each claim. In other words, the configuration, shape, size, number, and arrangement of each part of the conveying device may be changed as appropriate within the scope of the gist described above.

[0050] Next, a blade fixing structure according to a modified example will be described with reference to Fig. 9. Fig. 9 is a cross-sectional view showing an exemplary fixing structure 120 for blade 50 (second blade 50B) that is different from Fig. 8(b). Fixing structure 120 includes a through-hole 121 (first hole portion) that penetrates conveying pipe 10 in radial direction D4, and fixing means 125 that fixes second blade 50B to through-hole 121.

[0051] The fixing means 125 includes a flat head bolt 126 that passes through the through hole 121 of the conveying pipe 10 and the through hole 58 of the blade 50, a nut 127 that fastens the flat head bolt 126 to the conveying pipe 10 and the blade 50 (second blade 50B), and a washer 128 that is interposed between the nut 127 and the blade 50. The flat head bolt 126 is an embedded bolt that is embedded in the conveying pipe 10. For example, the flat head bolt 126 has a male thread portion 126b and a head portion 126d that has a tapered surface 126c that increases in diameter as it moves away from the male thread portion 126b. The through hole 121 has a tapered surface 121b that decreases in diameter as it moves inward in the radial direction D4 of the conveying pipe 10.

[0052] A flat head bolt 126 is inserted from the outside of the conveying pipe 10 through the through hole 121 and the through hole 58 of the blade 50 and tightened with a nut 127, thereby fixing the blade 50 to the inner peripheral surface 60b of the conveying pipe 10. At this time, the head 126d of the flat head bolt 126 enters the through hole 121 of the conveying pipe 10, and the tapered surface 126c of the head 126d is in close contact with the tapered surface 121b of the through hole 121, so that the head 126d and the outer peripheral surface 10b of the conveying pipe 10 are flush with each other.

[0053] That is, the head 126d does not protrude from the outer peripheral surface 10b of the conveying tube 10. Therefore, whether the location where the fixing structure 120 is provided is the portion P or a location other than the portion P, since the head 126d does not protrude from the outer peripheral surface 10b, it is possible to avoid collision of the roller 12b or the roller 14b with the head 126d.

[0054] As described above, in the conveying device 1, the conveying pipe 10 has a plurality of blades 50 on its inner peripheral surface 60b, and the rollers 12b and 14b contact the outer peripheral surface 10b of the conveying pipe 10 to rotatably support the conveying pipe 10. In a modified example, the conveying pipe 10 has a through hole 121 penetrating the conveying pipe 10 in the radial direction D4, and the plurality of blades 50 are fixed to the inner peripheral surface 60b of the conveying pipe 10 by a fixing means 125 passing through the through hole 121. In this conveying device 1, the fixing means 125 includes a bolt (e.g., a flat head bolt 126) inserted into the through hole 121, and the head of the bolt (e.g., a head 126d) is tightened so as to be flush with the outer peripheral surface 10b of the conveying pipe 10. Therefore, the head of the bolt can be prevented from protruding from the outer peripheral surface 10b of the conveying pipe 10, thereby avoiding interference with the rollers 12b and 14b. In this conveying device 1, the blades 50 can be replaced by attaching and detaching bolts from the outside of the conveying pipe 10 in the radial direction D4, making it easy to replace internal parts of the conveying pipe 10 and improving the maintainability of the inner surface 60b of the conveying pipe 10.

[0055] Although the above describes modified examples, the configuration of each part of the conveying device according to the present disclosure can be further modified. For example, in the above embodiment, an example was described in which the conveying pipe 10 includes a first conveying pipe unit 10A and a second conveying pipe unit 10B. However, the conveying device according to the present disclosure may include a conveying pipe that does not include either the first conveying pipe unit 10A or the second conveying pipe unit 10B. Furthermore, the conveying device may include a conveying pipe that is not divided in the form of the first conveying pipe unit 10A and the second conveying pipe unit 10B. Furthermore, the conveying device may include a conveying pipe support member that is not divided in the form of the first support member 20A and the second support member 20B.

[0056] In the above-described embodiment, the second support portion 13 includes the thrust-receiving roller 13b, the roller support portion 13c, and the steel material 13d. However, the configuration of the second support portion is not limited to the above example and can be changed as appropriate. The same applies to the first support portion and the third support portion.

[0057] Furthermore, in the above-described embodiment, a conveying device 1 including support pillars 30 and walkways 40 has been described. However, the number and arrangement of the support pillars and walkways can be changed as appropriate. Furthermore, a conveying device without walkways is also possible. Furthermore, in the above-described embodiment, a conveying device 1 including multiple arc-shaped blades 50 has been described. However, the shape, size, material, number and arrangement of the blades can be changed as appropriate. The same applies to the lining material. Furthermore, in the above-described embodiment, site A, which is a dam construction site, has been described as an example. However, the conveying device according to the present disclosure can also be applied to sites other than dam construction sites. [Explanation of symbols]

[0058] 1... conveying device, 2... hopper, 3... conveyor, 10... conveying pipe, 10A... first conveying pipe unit, 10B... second conveying pipe unit, 10b... outer circumferential surface, 10c, 10d... flange, 11... flange portion, 11b... first enlarged diameter portion, 11c... second enlarged diameter portion, 11d... recessed portion, 12... first support portion, 12b... roller, 13... second support portion, 13b... thrust receiving roller, 13c... roller support portion, 13d... steel material, 14... third support portion, 14b... roller, 14c...rotation support portion, 14d...base portion, 14f...shaft portion, 14g...bracket, 14h...steel material, 14j...fixing member, 20...transport pipe support member, 20A...first support member, 20B...second support member, 30...support, 40...walkway, 50...wing, 50A...first blade, 50B...second blade, 51...first arc-shaped portion, 52...first straight portion, 53...second straight portion, 54...second arc-shaped portion, 55...through hole, 56...main portion, 57...protruding portion, 58...through hole, 60...outer pipe, 6 0b...inner peripheral surface, 70...lining material, 71...bolt, 72...iron plate, 73...rubber plate, 73b...inclined surface, 74...hole portion, 76...nut, 77...sealing material, 80...first lining material, 90...second lining material, 91...half member, 92...opposing surface, 100, 110, 120...fixing structure, 101...flange, 102...fixing portion, 103...protrusion, 104...through hole, 105, 115, 125...fixing means, 106, 116...bolt, 107, 117,127...nut, 108,118,128...washer, 111...through hole (second hole portion), 120...fixing structure, 121...through hole (first hole portion), 121b...tapered surface, 126...flat head bolt, 126b...male thread portion, 126c...tapered surface, 126d...head, A...site, D...dump truck, D1...axial direction, D2...width direction, D3...rotational direction, D4...radial direction, M...material, P...part, S...slope, T...track, θ...central angle.

Claims

1. A conveying pipe for conveying materials for constructing a bank body, the conveying pipe being arranged at an angle, having a plurality of blades on an inner peripheral surface, and being rotatable, The outer circumferential surface of the conveying pipe is in contact with rollers, and the conveying pipe is rotatably supported by the rollers; the conveying pipe includes an outer pipe which is a steel pipe, a plurality of lining materials which are detachably arranged on the inner circumferential surface of the outer pipe, and a fixing structure which fixes the blades to the inner circumferential surface of the conveying pipe, Some of the plurality of lining materials are arranged to sandwich the fixing structure from both sides in the axial direction of the conveying pipe. Conveying pipe.

2. The fixing structure includes a flange protruding from the inner circumferential surface. The transfer pipe according to claim 1 .

3. A conveying device comprising the conveying pipe according to claim 1 or 2.

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