Ramp module, sedimentation apparatus, and method for constructing ramp module

Abstract

To provide a ramp module capable of preventing damaging of a ramp during transportation or construction, a sedimentation apparatus, and a method for constructing the ramp module.SOLUTION: A ramp module 10 comprises: a frame 11 of a three-dimensional shape; and a plurality of ramps 12 fixed to the frame 11. Each ramp 12 is formed at the outer edge into a rectangular shape in a plan view. The ramps 12 are arranged inside the frame 11. The frame 11 is formed into a three-dimensional shape so as to surround the ramps 12.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an inclined plate module, a sinking device, and a method for constructing an inclined plate module. [Background technology]

[0002] There is a settling device that removes suspended matter and flocs contained in a liquid by gravity settling on a plurality of inclined plates. The settling device has a plurality of inclined plates attached to a frame inside a settling tank. Among the settling devices, there is known one in which a plurality of inclined plate modules, each of which is formed by attaching a plurality of inclined plates to a frame and forming a unit, are prepared in advance, and the prepared plurality of inclined plate modules are installed in the settling tank. According to this settling device, the process of assembling a plurality of inclined plates to a frame can be eliminated from the installation process inside the settling tank, and workability inside the settling tank can be improved (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-126781 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the inclined plate module of Patent Document 1, multiple inclined plates protrude from the frame, which may cause damage to the multiple inclined plates during transportation or installation of the inclined plate module.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide an inclined plate module, a submersion device, and a construction method for an inclined plate module that can prevent damage to the inclined plate during transportation or construction. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention proposes the following means. <1> An inclined plate module according to one aspect of the present invention comprises a three-dimensional frame and a plurality of inclined plates fixed to the frame, the frame surrounding the plurality of inclined plates.

[0007] According to the inclined plate module, the frame surrounds the multiple inclined plates, so that the multiple inclined plates do not jump out of the frame. Therefore, the multiple inclined plates can be protected by the frame. This makes it possible to prevent the inclined plates from being damaged during transportation or installation of the inclined plate module.

[0008] <2> the above <1> In the inclined plate module according to the present invention, the inclined plate may be rectangular in a planar view, and a first outer edge and a second outer edge facing each other across the inclined plate may be fixed to the frame.

[0009] In this manner, the first outer edge and the second outer edge that face each other across the inclined plate are fixed to the frame, thereby enabling the inclined plate to be stably fixed to the frame.

[0010] <3> the above <2> The inclined plate module according to the present invention may further include a first member provided on the first outer edge and the second outer edge, the first member being connected to the frame.

[0011] In this way, the first member is provided on the first outer edge of the inclined plate and the second outer edge of the inclined plate. Therefore, the first outer edge and the second outer edge can be reinforced with the first member. This makes it possible to more effectively prevent the inclined plate from being damaged during transportation and installation of the inclined plate module.

[0012] In addition, when the inclined plate module is installed in the settling tank, for example, the first outer edge and the second outer edge are positioned at the upper end or the lower end, so that the liquid in the settling tank is less likely to be hindered by the first member from passing through the inclined plate module in the horizontal direction (the direction in which the first outer edge and the second outer edge extend). On the other hand, for example, if the first outer edge and the second outer edge are located at both ends in the horizontal direction, the first member may hinder the passage of liquid through the inclined plate module.

[0013] <4> the above <3> The inclined plate module according to the present invention may further comprise a second member attached to the frame and connected to both ends of the first member.

[0014] In this way, both ends of the first member are connected to the second member attached to the frame. Therefore, the first member can be fixed to the frame via the second member. This allows the inclined plate to be firmly fixed to the frame.

[0015] <5> The settling device according to another aspect of the present invention is <1> From the above <4> and a settling tank having a plurality of the inclined plate modules stacked therein.

[0016] According to the sinking device, the inclined plate module can prevent the inclined plates from jumping out of the frame by surrounding the inclined plates with the frame. Therefore, the inclined plates are protected by the frame. This can prevent the inclined plates from being damaged during transportation of the inclined plate module. Furthermore, by stacking a plurality of inclined plate modules inside the settling tank, the inclined plate modules can be stacked without damaging the inclined plate.

[0017] <6> The method for installing the inclined plate module according to another aspect of the present invention is <1> From the above <4> A plurality of inclined plate modules according to any one of the above items are stacked in a settling tank.

[0018] According to the method for constructing the inclined plate module, the frame surrounds the multiple inclined plates in the inclined plate module, so that the multiple inclined plates do not protrude from the frame. Therefore, the multiple inclined plates are protected by the frame. This prevents the inclined plates from being damaged during transportation of the inclined plate module. Furthermore, by stacking a plurality of inclined plate modules in the settling tank, the inclined plate modules can be stacked without damaging the inclined plate.

[0019] Furthermore, the inclined plate module, which is equipped with multiple inclined plates in advance, can be stacked in the settling tank. This eliminates the need to assemble a frame inside the settling tank and attach multiple inclined plates to the assembled frame. Furthermore, it is not necessary to provide a scaffolding for workers inside the settling tank, which is necessary for assembling the frame and attaching multiple inclined plates. This reduces the number of steps required for construction, in which the inclined plate modules are stacked in the settling tank. Effect of the Invention

[0020] According to the present invention, damage to the inclined plate during transportation and installation can be prevented. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is a front view showing a sedimentation device according to an embodiment of the present invention. [Diagram 2] FIG. 13 is a perspective view of a stack of inclined plate modules according to the embodiment. [Diagram 3] FIG. 2 is a perspective view showing an upper portion of the inclined plate module according to the embodiment. [Figure 4] FIG. 2 is a perspective view showing a state in which a first member is attached to an inclined plate of the inclined plate module according to the embodiment. [Diagram 5] FIG. 4 is a side view showing a first member and a second member of the inclined plate module according to the embodiment. [Figure 6] FIG. 4 is an enlarged perspective view of a portion VI in FIG. 3 . [Figure 7] FIG. 13 is a perspective view showing another second member in the inclined plate module according to the embodiment. [Figure 8] 1 is a perspective view illustrating a method for installing an inclined plate module according to an embodiment. FIG. [Figure 9] FIG. 11 is a vertical cross-sectional view of an inclined plate module according to a modified example. [Figure 10] FIG. 13 is a side view of a tilt plate module according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an inclined plate module, a sinking device, and a method for constructing the inclined plate module according to one embodiment of the present invention will be described with reference to Figs. <Sedimentation device> As shown in Fig. 1, the settling device 1 is a device that removes suspended solids and flocs contained in a liquid (water) by gravity settling. Flocs are clumps of coagulant particles that are generated by the precipitation of a chemical agent added to the liquid as a coagulant. The settling device 1 includes a settling tank 2, a plurality of inclined plate modules 10, and a connection unit 50. The settling tank 2 has side walls 3, 3 and a floor 4 that form a flow path through which liquid flows inside. The upper part of the settling tank 2 (i.e., the upper parts of the side walls 3, 3) is opened at an opening 5. The opening 5 is opened so that an inclined plate module 10 can be carried into the inside of the settling tank 2. The inclined plate modules 10 carried in through the opening 5 are stacked in multiple order inside the settling tank 2 from the floor 4 toward the opening 5.

[0023] In the following description, the floor surface 4 side of the settling tank 2 is referred to as the lower side, and the opening 5 side as the upper side. The direction perpendicular to the up-down direction and parallel to the side wall 3 is referred to as the front-to-back direction, with the front side of the paper as the front and the back side as the rear. The direction perpendicular to the up-down direction and perpendicular to the side wall 3 is referred to as the left-to-right direction, with the left side of the paper as the leftward direction and the right side of the paper as the rightward direction. The liquid introduced into the settling tank 2 flows horizontally, for example, from the front to the rear in the front-to-back direction.

[0024] <Inclined Plate Module> 2 and 3, the inclined plate module 10 includes a frame 11, a plurality of inclined plates 12, a plurality of first members 13, a plurality of second members 14, and a plurality of third members 15 (see FIG. 6). The frame 11 has a three-dimensional shape.

[0025] <frame> The frame 11 includes a plurality of pipes 20 and a plurality of joints 21. The plurality of pipes 20 include a pair of first pipes 20A, a pair of second pipes 20B, a pair of third pipes 20C, a pair of fourth pipes 20D, a pair of fifth pipes 20E, and a pair of sixth pipes 20F. The plurality of pipes 20 are formed of a non-corrosive metal, a resin having sufficient strength, or the like. Specifically, the plurality of pipes 20 are preferably formed of, for example, stainless steel pipes (SUS pipes), or a combination of a rigid polyvinyl chloride pipe (PVC pipe) and a stainless steel pipe, or the like.

[0026] The pair of first pipes 20A are arranged at an interval in the front-rear direction on the upper part of the frame 11 and extend in the left-right direction. The pair of second pipes 20B are arranged between the pair of first pipes 20A in the front-rear direction and extend in the front-rear direction. The pair of first pipes 20A and the pair of second pipes 20B are arranged in a square in a plan view. The pair of third pipes 20C are arranged at a distance from each other in the front-rear direction at the bottom of the frame 11 and extend in the left-right direction. The pair of fourth pipes 20D are arranged between the pair of third pipes 20C in the front-rear direction and extend in the front-rear direction. The pair of third pipes 20C and the pair of fourth pipes 20D are arranged in a rectangular shape in a plan view. In the illustrated example, the pair of third pipes 20C and the pair of fourth pipes 20D are square in a plan view, but may be rectangular.

[0027] The pair of fifth pipes 20E are disposed between the second pipe 20B on the right side and the fourth pipe 20D on the right side, and extend in the vertical direction, on the right side of the frame 11. The pair of fifth pipes 20E, the second pipe 20B on the right side, and the fourth pipe 20D on the right side are disposed in a square shape in a side view. The pair of sixth pipes 20F are disposed between the second pipe 20B on the left side and the fourth pipe 20D on the left side on the left side of the frame 11, and extend in the up-down direction. The pair of sixth pipes 20F, the second pipe 20B on the left side, and the fourth pipe 20D on the left side are disposed in a rectangular shape in a side view. In the illustrated example, the pair of sixth pipes 20F, the second pipe 20B on the left side, and the fourth pipe 20D on the left side are square in a plan view, but may be rectangular.

[0028] Among the first pipe 20A to the sixth pipe 20F, the first pipe 20A to the fourth pipe 20D, which are frame members extending in the front-rear and left-right directions, may have the same length, and the fifth pipe 20E to the sixth pipe 20F, which are frame members extending in the up-down direction, may have the same length. Furthermore, the fifth pipe 20E to the sixth pipe 20F may have a length shorter than the first pipe 20A to the fourth pipe 20D. In this case, the frame 11 becomes a rectangular parallelepiped that is flattened in the up-down direction.

[0029] Here, the length of the first pipe 20A to the fourth pipe 20D is preferably, for example, 500 mm to 1300 mm, and more preferably 800 mm to 1100 mm. Moreover, the length of the fifth pipe 20E to the sixth pipe 20F (in other words, the height of the frame 11) is preferably, for example, 300 mm to 1100 mm, and more preferably 400 mm to 900 mm. If the length of each of the pipes 20A-20F is too small, the frame 11 becomes too small, and the number of modules required for construction increases, which may increase the number of transportation times and the construction time, resulting in poor construction workability. On the other hand, if the length of each of the pipes 20A-20F is too large, the frame 11 becomes too large, resulting in poor workability during construction.

[0030] The ends of three of the pipes 20 are butted together at a convex corner of the frame 11 to form a convex angle. The ends of the three pipes 20 butted together at a convex angle are joined by being inserted into joints 21. The joints 21 are provided at eight locations at the convex corner of the frame 11. The joints 21 are made of a non-corrosive metal such as SUS, or a resin with sufficient strength such as polyvinyl chloride (PVC), or the like. As a result, the frame 11 is formed into a cube that is corrosion-resistant and strong by the multiple pipes 20 and multiple joints 21. Note that in the embodiment, a rectangular parallelepiped (hexahedron, a cube in the illustrated example) is described as a representative example of the three-dimensional frame 11, but the frame 11 may be formed into another three-dimensional shape. A plurality of inclined plates 12 are fixed to the frame 11. The frame 11 supports the plurality of inclined plates 12 so as to surround them. The plurality of inclined plates 12 do not protrude from the inside of the frame 11 to the outside of the frame 11.

[0031] <Slanted plate> As shown in Figs. 2, 4, and 5, a plurality of inclined plates 12 are disposed inside the frame 11. The inclined plates 12 are fixed to the frame 11 in a state inclined from above to below inside the frame 11. The inclined plates 12 are formed, for example, in a sheet shape with an outer edge 12a of a rectangular shape in a plan view from a resin such as PVC. The rigidity of the inclined plates 12 may be ensured, for example, by forming projections and recesses in the thickness direction of the resin sheet. The inclined plates 12 are formed, for example, by a known molding method. The inclined plates 12 may be formed, for example, by vacuum molding to a thickness that ensures the rigidity.

[0032] The inclined plate 12 has a first outer edge 12b and a second outer edge 12c at the outer edge 12a. The first outer edge 12b and the second outer edge 12c are arranged on the outer edge 12a of the inclined plate 12, facing each other with the inclined plate 12 therebetween. The first outer edge 12b is located at the upper edge of the outer edge 12a of the inclined plate 12. The second outer edge 12c is located at the lower edge of the outer edge 12a of the inclined plate 12. A first member 13 is provided on each of the first outer edge 12b and the second outer edge 12c. The first member 13 is fixed to the frame 11 via a second member 14 (see FIG. 3) described later.

[0033] <First component> The first member 13 has a main body 30 and a protruding piece 31. The main body 30 and the protruding piece 31 of the first member 13 are integrally formed by extrusion molding of, for example, a thermoplastic resin or a metal. The thermoplastic resin is not particularly limited, but is preferably PVC (vinyl chloride), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), or the like. The metal is not particularly limited, but is preferably stainless steel, or the like.

[0034] The main body 30 has a first portion 33 and a second portion 34. The first portion 33 is fixed to the frame 11 via a second member 14 described later. The second portion 34 is integrally formed at a base end 33a of the first portion 33. The second portion 34 is inclined at an inclination angle θ with respect to the first portion 33. Thus, the first portion 33 and the second portion 34 are formed in a V-shaped cross section. In the embodiment, an example in which the inclination angle θ is 120° will be described, but the inclination angle θ is not limited to 120°. By forming the first portion 33 and the second portion 34 to have a V-shaped cross section, the strength and rigidity of the main body 30 (that is, the first member 13) can be increased.

[0035] A protruding piece 31 protrudes from a base end 33a of the first portion 33 along the second portion 34. The protruding piece 31 is disposed at a distance from the second portion 34. The first outer edge 12b is inserted between the second portion 34 and the protruding piece 31. That is, the second portion 34 and the protruding piece 31 are fitted to the first outer edge 12b. The second portion 34 and the protruding piece 31 are connected to the first outer edge 12b with an adhesive (solvent) such as tetrahydrofuran (THF). As a result, the first member 13 is provided in a state of being fitted to the first outer edge 12b. The first member 13 is also provided in a state of being fitted to the second outer edge 12c, similar to the first outer edge 12b.

[0036] By connecting the first member 13 to the first outer edge 12b and the second outer edge 12c, the inclined plate 12 can be reinforced by the first member 13. This ensures the strength of the inclined plate 12 when flocks are accumulated on the inclined plate 12. In the embodiment, an example in which the first member 13 is connected in a state in which it is fitted to the first outer edge 12b and the second outer edge 12c will be described, but this is not limiting. For example, the protruding piece 31 may be removed from the first member 13, and the second portion 34 may be connected to the first outer edge 12b and the second outer edge 12c with an adhesive (solvent). Hereinafter, the first member 13 connected to the first outer edge 12b may be referred to as the first member 13A, and the first member 13 connected to the second outer edge 12c may be referred to as the first member 13B.

[0037] <Second member> 2, 3, and 6, the first member 13A is connected (fixed) to the frame 11 via the second member 14. Moreover, the first member 13B shown in FIG. 5 is connected (fixed) to the frame 11 via the second member 14, similar to the first member 13A. As shown in Figures 2, 3, and 6, the multiple second members 14 are attached to a pair of first pipes 20A, a pair of second pipes 20B, a pair of third pipes 20C, a pair of fourth pipes 20D, a pair of fifth pipes 20E, and a pair of sixth pipes 20F. An example in which a plurality of second members 14 are attached to a pair of first pipes 20A will be described below with reference to Figs.

[0038] As shown in FIG. 3 and FIG. 6, the second members 14 are attached at regular intervals along the pair of first pipes 20A. The second members 14 include a main body 40 and a protruding piece 41. The main body 40 and the protruding piece 41 of the second member 14 are integrally formed, for example, by injection molding of a thermoplastic resin or a metal, similar to the first member 13. The thermoplastic resin is not particularly limited, but is preferably PVC (vinyl chloride), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), or the like. The metal is not particularly limited, but is preferably stainless steel, or the like. In addition, the main body 40 and the protruding piece 41 of the second member 14 are preferably made of the same material as the first member 13.

[0039] The main body 40 is formed, for example, in a cylindrical shape so as to be able to be fitted into the first pipe 20A. When the main body 40 is fitted into the first pipe 20A, the main body 40 is connected to the first pipe 20A with an adhesive (solvent) such as tetrahydrofuran (THF). A protruding piece 41 is integrally formed with the main body 40. The protruding piece 41 protrudes from the peripheral wall 40a of the main body 40 toward the inside of the frame 11 along the end 13Aa of the first member 13A.

[0040] 3, 4, and 6, an end portion 13Aa of the first member 13A is in contact with a protruding piece 41 of the second member 14. A portion of the end portion 13Aa that is a first portion 33 is attached (connected) to the protruding piece 41 by a third member 15 (in the embodiment, this is a bolt 15a and a nut (not shown), but may be, for example, a rivet, etc.). The second member 14 is provided on the pair of first pipes 20A. Thus, both end portions 13Aa, 13Aa of the first member 13A are attached to the protruding piece 41 (that is, the second member 14). Furthermore, both end portions 13Ba, 13Ba of the first member 13B are attached to the protruding pieces 41 (second member 14) in the same manner as both end portions 13Aa, 13Aa of the first member 13A. As a result, the inclined plate 12 is attached to the frame 11 at an inclination angle θ (120° in this embodiment).

[0041] In the embodiment, an example in which the main body 40 of the second member 14 is formed into a cylindrical shape has been described, but this is not limiting. As another example, the main body 40 of the second member 14 may be formed into a C-shaped cross section. A second member 44 in which the main body 40 is formed into a C-shaped cross section will be described with reference to FIG.

[0042] 7, the second member 44 includes a main body 45 having a C-shaped cross section and a protruding piece 46. According to this second member 44, for example, the main body 45 can be attached to the frame 11 by elastically deforming the main body 45. This makes it even easier to attach the second member 44 to the frame 11. The protruding piece 46 has a hole 47 through which the bolt 15a passes. An end 13Aa (see FIG. 6) of the first member 13A is attached (connected) to the protruding piece 46 with the bolt 15a and a nut.

[0043] <Third member> The third member 15 is formed of, for example, a thermoplastic resin or a metal. The thermoplastic resin is not particularly limited, but is preferably PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), or the like. The metal is not particularly limited, but is preferably stainless steel, or the like. In addition, when a metal third member 15 is used, the third member 15 may interfere with the second member 14, the first member 13, or the like, causing wear of the second member 14, the first member 13, or the like. For this reason, the metal third member 15 may be insert molded into the resin. In the embodiment, the bolt 15a and the nut are described as an example of the third member 15, but the present invention is not limited thereto. As another example, the third member 15 may be another member such as a screw.

[0044] 2 to 4 and 6, both ends 13Aa, 13Aa of the first member 13A are attached to the second member 14 provided on the pair of first pipes 20A with bolts 15a and nuts. That is, both ends 13Aa, 13Aa of the first member 13A are connected to the pair of first pipes 20A via the second member 14. Also, both ends 13Aa, 13Aa of the first member 13A are connected to the pair of fifth pipes 20E via the second member 14, similar to the pair of first pipes 20A. Furthermore, both ends 13Ba, 13Ba of the first member 13B are connected to a pair of third pipes 20C and a pair of sixth pipes 20F via the second member 14, similar to both ends 13Aa, 13Aa of the first member 13A.

[0045] In this manner, both ends 13Aa, 13Aa of the first member 13A are attached to the pair of first pipes 20A and the pair of fifth pipes 20E via the second member 14. Also, both ends 13Ba, 13Ba of the first member 13B are attached to the pair of third pipes 20C and the pair of sixth pipes 20F via the second member 14. As a result, the first outer edges 12b and the second outer edges 12c of the multiple inclined plates 12 are fixed to the frame 11 via the first member 13A, the first member 13B, and the second member 14.

[0046] The multiple inclined plates 12 are arranged inside the frame 11 in a state inclined from top to bottom at an inclination angle θ (120°). The multiple inclined plates 12 arranged inside the frame 11 are fixed to the frame 11 via multiple second members 14. The second members 14 have a strength sufficient to withstand the load acting from the inclined plates 12 when flocks are accumulated on the inclined plates 12.

[0047] In this manner, the frame 11, the multiple inclined plates 12, the multiple first members 13, the multiple second members 14, and the multiple third members 15 form the inclined plate module 10. As described above, the frame 11 surrounds the multiple inclined plates 12, and the multiple inclined plates 12 do not protrude from the inside of the frame 11 to the outside of the frame 11. The frame 11 surrounding the multiple inclined plates 12 means that the inclined plates 12 do not protrude from each surface constituting the three-dimensional shape formed by the frame 11 to the outside of the frame 11. Note that, in a state in which the frame 11 surrounds the multiple inclined plates 12, the frame 11 does not have to surround the first member 13, the second member 14, and the third member 15, and the first member 13, the second member 14, and the third member 15 may protrude from the inside of the frame 11 to the outside.

[0048] In the embodiment, an example in which the multiple inclined plates 12 are fixed to the frame 11 via the first member 13A, the first member 13B, and the second member 14 will be described, but the present invention is not limited to this. As another example, for example, multiple cuts (not shown) may be formed in the frame 11 at regular intervals with an inclination angle θ (120° in the embodiment), and the inclined plates 12 may be provided and fixed in the multiple cuts.

[0049] <Connection unit> 1, 2, and 8, a plurality of inclined plate modules 10 are stacked upward and aligned in the left-right direction by a connection unit 50. The connection unit 50 includes a plurality of legs 51, a plurality of first joints 52, and a plurality of second joints 53.

[0050] 1 and 8, the multiple legs 51 are installed on the floor surface 4 of the settling tank 2. The lower portion of the frame 11 of the inclined plate module 10 is attached from above to the multiple legs 51 installed on the floor surface 4. As a result, the inclined plate module 10 is installed on the floor surface 4 via the multiple legs 51. The legs 51 fix the lower portions of the inclined plate modules 10 to the floor surface 4. The legs 51 are made of a non-corrosive metal such as SUS, or a resin having sufficient strength such as polyvinyl chloride (PVC).

[0051] As shown in FIG. 8, the first joints 52 fix the upper and lower inclined plate modules 10 to each other when the inclined plate modules 10 are stacked upward. The first joints 52 include, for example, a first protrusion 55 and a second protrusion 56. The first protrusion 55 protrudes upward from a joint 21 (see FIG. 2) provided on the upper part of the frame 11 of the inclined plate module 10. The first protrusion 55 has a hole (female part) 57 that opens on the upper surface. The second protrusion 56 protrudes downward from a joint 21 provided on the lower part of the frame 11 of the inclined plate module 10. The second protrusion 56 has a protrusion (male part) that can be inserted into the hole 57 of the first protrusion 55.

[0052] The second protrusion 56 of the upper inclined plate module 10 is inserted into the hole 57 of the first protrusion 55 of the lower inclined plate module 10. This allows the upper inclined plate module 10 to be stacked on the lower inclined plate module 10 in a tiered manner. In this way, by providing the inclined plate module 10 with a plurality of first protrusions 55 and a plurality of second protrusions 56, the inclined plate modules 10 can be easily stacked. The first joint 52 is formed from a non-corrosive metal such as SUS, or a resin having sufficient strength such as polyvinyl chloride (PVC). As shown in FIG. 2, the first joint 52 may be, for example, a commonly known joint for connecting pipes to each other.

[0053] 1 and 2, the second joints 53 fix the left and right inclined plate modules 10 to each other when the multiple inclined plate modules 10 are arranged in parallel in the left-right direction. Specifically, the second joints 53 fix the frames 11 of the inclined plate modules 10 arranged in parallel to each other. Alternatively, the second joints 53 fix the frames 11 of the inclined plate modules 10 arranged in parallel to each other when the multiple inclined plate modules 10 are arranged in parallel in the front-rear direction. For example, a commonly known joint for connecting pipes is used as the second joint 53. The second joint 53 is made of a non-corrosive metal such as SUS, or a resin having sufficient strength such as polyvinyl chloride (PVC), or the like.

[0054] The multiple inclined plate modules 10 can be assembled on-site inside the settling tank 2 by the multiple legs 51, the multiple first joints 52, and the multiple second joints 53. That is, the settling device 1 is assembled inside the settling tank 2 in a state where multiple inclined plate modules 10 are stacked inside the settling tank 2 by the multiple legs 51, the multiple first joints 52, and the multiple second joints 53.

[0055] <How to install the inclined panel module> Next, a method for constructing the inclined plate module 10 will be described with reference to Figures 1, 2, and 8. In the following description of the method for constructing the inclined plate module 10, the legs 51, the first joints 52, and the second joints 53 will be abbreviated to the legs 51, the first joints 52, and the second joints 53. In addition, the first joint 52 will be described using the first protrusion 55 and the second protrusion 56 as an example. The first protrusion 55 and the second protrusion 56 will be described as being attached in a factory before the inclined plate module 10 is shipped, but the first protrusion 55 and the second protrusion 56 may be attached at the construction site.

[0056] 1, 2 and 8, in a first step, legs 51 are installed on the floor surface 4 inside the settling tank 2. After the legs 51 are installed on the floor surface 4 of the settling tank 2, in a second step, the inclined plate module 10 with the first protrusion 55 attached is carried into the settling tank 2 through the opening 5 and installed on the legs 51. As a result, the first inclined plate module 10 is installed on the floor surface 4 of the settling tank 2 via the legs 51.

[0057] After the first tier of inclined plate modules 10 are installed on the legs 51, in the third step, the inclined plate module 10 to which the first protrusion 55 and the second protrusion 56 are attached is carried into the settling tank 2 through the opening 5. The second protrusion 56 of the carried-in inclined plate module 10 is inserted into the hole 57 of the first protrusion 55 of the first tier of inclined plate module 10. As a result, inside the settling tank 2, the second tier of inclined plate modules 10 are stacked on top of the first tier of inclined plate modules 10. Thereafter, the third step is sequentially repeated. By sequentially repeating the third step, inside the settling tank 2, a plurality of inclined plate modules 10 are stacked on top of the second stage of the inclined plate module 10.

[0058] Inside the settling tank 2, a plurality of inclined plate modules 10 are stacked on the floor surface 4, and then the plurality of inclined plate modules 10 are arranged in parallel in the left-right direction on the floor surface 4 with respect to the stacked plurality of inclined plate modules 10. After the plurality of inclined plate modules 10 are stacked and arranged in parallel in the left-right direction, in a fourth step, the frames 11 of the inclined plate modules 10 are fixed to each other with second joints 53. This completes the construction method for the inclined plate modules 10, in which a plurality of inclined plate modules 10 are stacked in layers from the floor surface 4 inside the settling tank 2.

[0059] According to the inclined plate module 10 of the embodiment described above, as shown in Figs. 1 and 2, the multiple inclined plates 12 are surrounded by the frame 11. Therefore, the multiple inclined plates 12 can be prevented from protruding from the frame 11. This allows the multiple inclined plates 12 to be protected by the frame 11. Therefore, the inclined plates 12 can be prevented from being damaged during transportation or installation of the inclined plate module 10.

[0060] Here, as shown in Fig. 3 and Fig. 6, the plurality of first members 13, the plurality of second members 14, and the plurality of third members 15 may protrude outward from the frame 11. That is, the strength and rigidity of the first members 13, the second members 14, and the third members 15 are ensured similarly to that of the frame 11. This makes it possible to prevent the inclined plate module 10 from being damaged during transportation or installation, even if the plurality of first members 13, the plurality of second members 14, and the plurality of third members 15 protrude outward from the frame 11.

[0061] 2 to 4, among the outer edges 12a of the multiple inclined plates 12, a first outer edge 12b and a second outer edge 12c that face each other across the inclined plate 12 are fixed to the frame 11. This allows the inclined plate 12 to be stably fixed to the frame 11.

[0062] Furthermore, as shown in Figs. 4 and 5, a first member 13A is provided on the first outer edge 12b of the inclined plate 12. Therefore, the first outer edge 12b can be reinforced by the first member 13A. Moreover, a first member 13B is provided on the second outer edge 12c of the inclined plate 12. Therefore, the second outer edge 12c can be reinforced by the first member 13B. This makes it possible to more effectively prevent the inclined plate 12 from being damaged during transportation or installation of the inclined plate module 10.

[0063] 1 and 5, in a state where a plurality of inclined plate modules 10 are installed in the settling tank 2, for example, the first outer edge 12b is positioned at the upper end and the second outer edge 12c is positioned at the lower end. This makes it difficult for the first member 13A and the first member 13B to obstruct the liquid in the settling tank 2 from passing through the inclined plate module 10 in the front-rear direction (i.e., the horizontal direction in which the first outer edge 12b and the second outer edge 12c extend). In contrast, for example, if the first outer edge 12b and the second outer edge 12c are located at both ends in the front-rear direction, the passage of liquid through the inclined plate module 10 may be hindered by the first members 13A and 13B.

[0064] 3 and 4, both ends 13Aa of the first member 13A and both ends 13Ba of the first member 13B are connected to the second member 14 attached to the frame 11. Therefore, the first member 13A and the first member 13B can be fixed to the frame 11 via the second member 14. This allows the inclined plate 12 to be firmly fixed to the frame 11.

[0065] In addition, according to the above-described embodiment of the sinking device 1 and the method of constructing the inclined plate module 10, as shown in Figs. 1 and 2, the frame 11 of the inclined plate module 10 surrounds the multiple inclined plates 12. This prevents the inclined plates 12 from protruding from the frame 11. This allows the multiple inclined plates 12 to be protected by the frame 11. This prevents the inclined plates 12 from being damaged during transportation of the inclined plate module 10. Furthermore, by stacking a plurality of inclined plate modules 10 inside the settling tank 2, the inclined plate modules 10 can be stacked without damaging the inclined plates 12.

[0066] In addition, the inclined plate modules 10 equipped with the multiple inclined plates 12 in advance can be stacked on the floor surface 4 inside the settling tank 2. This eliminates the need for an operation to assemble the frame 11 inside the settling tank 2 and an operation to attach the multiple inclined plates 12 to the assembled frame 11. Furthermore, it is not necessary to provide a scaffolding for workers required for assembling the frame 11 and attaching the multiple inclined plates 12 inside the settling tank 2. This reduces the number of steps required for construction to stack the inclined plate modules 10 in the settling tank 2.

[0067] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0068] For example, the first member 13 and the second member 14 may be omitted. In the above embodiment, the frame 11 is provided with a plurality of pipes 20, but the present invention is not limited thereto. For example, as in the modified inclined plate module 10A shown in FIG. 9 and FIG. 10, the frame 11 may be provided with a plurality of angle members 60 (e.g., angle irons) instead of the plurality of pipes 20. For example, when the angle members 60 are made of steel (steel), they may be shaped steel (e.g., angle irons) listed in Table 1 of JIS G 3192:2014. The material of the angle members 60 is not limited to steel, and may be resin. Even in the case of resin angle members 60, L-shaped angles or the like may be used as appropriate, as in the case of steel. In the case of such angle members 60, it is not necessary to use joints 21 to connect the angle members 60 to each other, and they can be mechanically fixed by, for example, bolts, rivets, or the like. In the modified example shown in FIG. 9 and FIG. 10, the angle material 60 includes a first piece 60a and a second piece 60b. The angle material 60 is a so-called L-shaped angle, and the first piece 60a and the second piece 60b are perpendicular to each other in a side view from the left-right direction. The first portion 33 of the first member 13 is fixed to the first piece 60a. The first piece 60a and the first portion 33 are fixed by, for example, an adhesive. The first portion 33 and the second portion 34 of the first member 13 are inclined at an inclination angle θ' in a front view from the front-rear direction. The inclination angle θ' is, for example, 60 degrees. The second portion 34 is fixed to the inclined plate 12 via the third member 15. The third member 15 includes a bolt 15a and a nut 15b. Furthermore, the pipe 20 is not limited to a round pipe, but may be a square pipe. For example, when the frame 11 is provided with a plurality of pipes 20 (round pipes, square pipes) or a plurality of angle irons 60, the inclined plate modules 10 can optimally exert the necessary strength in cases such as (1) when a worker stands on top of the inclined plate modules 10 during construction, or (2) when the inclined plate modules 10 are stacked, the lower inclined plate module 10 supports the weight of the upper inclined plate module 10.

[0069] In addition, the components in this embodiment can be replaced with well-known components as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0070] 1...sedimentation device, 2...sedimentation tank, 10...inclined plate module, 11...frame, 12...inclined plate, 12a...outer edge of inclined plate, 12b...first outer edge, 12c...second outer edge, 13...first member, 13A...first member, 13B...first member, 13Aa...both ends of first member, 13Ba...both ends of first member, 14, 44...second member.

Claims

1. A three-dimensional frame, a plurality of inclined plates fixed to the frame; The frame surrounds the plurality of inclined plates. Tilt plate module.

2. The inclined plate has a rectangular shape in a plan view, Among the outer edges of the inclined plate, a first outer edge and a second outer edge opposed to each other across the inclined plate are fixed to the frame. The ramp module of claim 1 .

3. a first member provided on the first outer edge and the second outer edge; the first member is connected to the frame; The ramp module of claim 2 .

4. A second member is attached to the frame and both ends of the first member are connected to the second member. The ramp module of claim 3 .

5. A tilt plate module according to any one of claims 1 to 4, a settling tank having a plurality of the inclined plate modules stacked therein; Sedimentation device.

6. A plurality of inclined plate modules according to any one of claims 1 to 4 are stacked in a settling tank. How to install the tilt plate module.

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