Inclined plate module, sinking device, and construction method for inclined plate module

Abstract

The present invention provides an inclined plate module, a sinking device, and a method for constructing an inclined plate module that can prevent damage to the inclined plate during transportation or construction. [Solution] The inclined plate module 10 comprises a frame 11 and a plurality of inclined plates 12. The frame 11 surrounds the plurality of inclined plates 12. The plurality of inclined plates 12 are parallel to each other and inclined in the left-right direction to the first side S1 from top to bottom when viewed from the front. The upper end of the first inclined plate 12 on the first side S1 is located between the upper left and right members 20X, and the lower end is located between the upper and lower members 20Z of the first side S1. The lower end of the second inclined plate 12 on the second side S2 is located between the lower left and right members 20X, and the upper end is located between the upper and lower members 20Z of the second side S2. The left-right distance L1 between the upper end of the first inclined plate 12 and the upper and lower members 20Z of the first side S1 is equal to the left-right distance L2 between the lower end of the second inclined plate 12 and the upper and lower members 20Z of the second side S2.

Description

Technical Field

[0001] The present invention relates to an inclined plate module, a sedimentation apparatus, and a construction method for the inclined plate module.

Background Art

[0002] As a sedimentation apparatus, there is an apparatus that removes suspended substances and flocs contained in a liquid by gravity sedimentation on a plurality of inclined plates. In the sedimentation apparatus, a plurality of inclined plates are attached to a frame inside a sedimentation tank. Among sedimentation apparatuses, there is known an apparatus in which a plurality of inclined plate modules each formed by unitizing a plurality of inclined plates attached to a frame are prepared in advance, and the plurality of prepared inclined plate modules are installed in a sedimentation tank. According to this sedimentation apparatus, in the installation process inside the sedimentation tank, the step of assembling the plurality of inclined plates to the frame can be omitted, and the workability during construction inside the sedimentation tank can be improved (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] However, in the inclined plate module of Patent Document 1, the plurality of inclined plates protrude from the frame. For this reason, there is a risk that the plurality of inclined plates may be damaged during transportation or construction of the inclined plate module.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inclined plate module, a sedimentation apparatus, and a construction method for the inclined plate module that can prevent the inclined plates from being damaged during transportation or construction.

Means for Solving the Problem

[0006] To solve the aforementioned problems, the present invention proposes the following means. An inclined plate module according to one aspect of the present invention comprises a rectangular parallelepiped frame and a plurality of inclined plates fixed to the frame, wherein the frame includes four front and rear members parallel to the front-rear direction, four upper and lower members parallel to the upper and lower direction perpendicular to the front-rear direction, and four left and right members parallel to the left and right direction perpendicular to both the front-rear and upper and lower directions, and surrounds the plurality of inclined plates, the plurality of inclined plates are parallel to each other and parallel to the front and rear members, inclined with respect to the upper and lower members in a front view from the front-rear direction, extending toward the first side in the left-right direction as from the top to the bottom, and arranged at equal intervals in the left-right direction, and among the plurality of inclined plates, the first inclined plate is the one located furthest toward the first side in the left-right direction The upper end of the inclined plate is located between the two upper left and right members of the four left and right members, and the lower end of the first inclined plate is located between the two upper and lower members of the four upper and lower members, and the lower end of the second inclined plate, which is located furthest to the second side in the left-right direction among the plurality of inclined plates, is located between the two lower left and right members of the four left and right members, and the upper end of the second inclined plate is located between the two upper and lower members of the four upper and lower members, and the distance in the left-right direction between the upper end of the first inclined plate and the two upper and lower members of the first side is equal to the distance in the left-right direction between the lower end of the second inclined plate and the two upper and lower members of the second side. [Effects of the Invention]

[0007] According to the present invention, it is possible to prevent damage to the inclined plate during transportation or construction. [Brief explanation of the drawing]

[0008] [Figure 1] A front view showing a sedimentation device according to an embodiment of the present invention. [Figure 2] A magnified front view of the sinking device shown in Figure 1, showing the stacked inclined plate modules. [Figure 3] A magnified front view of the sinking device shown in Figure 1, showing the stacked state of other inclined plate modules. [Figure 4] A front view showing the sinking device in Figure 1, with some of the inclined plate modules stacked in different orientations. [Figure 5] A perspective view showing stacked inclined plate modules according to the embodiment. [Figure 6] A perspective view showing the upper part of an inclined plate module according to an embodiment. [Figure 7] A perspective view showing the inclined plate module according to the embodiment with the first member attached to the inclined plate. [Figure 8] A side view showing the first member and the first member of the inclined plate module according to the embodiment. [Figure 9] An enlarged perspective view of section IX in Figure 6. [Figure 10] A perspective view showing another second member in the inclined plate module according to the embodiment. [Figure 11] A perspective view illustrating the construction method of the inclined plate module according to this embodiment. [Figure 12] A perspective view illustrating the size of the inclined plate module according to the embodiment. [Figure 13] A perspective view of a structure formed by stacking multiple inclined plate modules according to the embodiment. [Figure 14] A front view showing a modified example of a structure in which multiple inclined plate modules according to the embodiment are stacked. [Figure 15] A longitudinal cross-sectional view of an inclined plate module according to a modified example. [Figure 16] Side view of an inclined plate module according to a modified example. [Figure 17] A perspective view of the inclined plate module according to a modified example. [Modes for carrying out the invention]

[0009] The following describes an inclined plate module, a sinking device, and a construction method for the inclined plate module according to one embodiment of the present invention, with reference to Figures 1 to 17. <Sedimentation Apparatus> As shown in Figure 1, the sedimentation apparatus 1 is an apparatus that removes suspended substances and flocs contained in a liquid (water) by gravity sedimentation. Flocs are aggregates of coagulant particles formed by precipitation of a chemical agent added as a coagulant to the liquid. The sedimentation apparatus 1 includes a sedimentation tank 2, a plurality of inclined plate modules 10, and a connection unit 50. The sedimentation tank 2 forms a flow path for liquid to flow therein by both side walls 3, 3 and a floor surface 4. The upper part of the sedimentation tank 2 (that is, the upper parts of both side walls 3, 3) is opened at an opening 5. The opening 5 is opened to allow the inclined plate module 10 to be carried into the interior of the sedimentation tank 2. A plurality of the inclined plate modules 10 carried in from the opening 5 are stacked in sequence from the floor surface 4 toward the opening 5 inside the sedimentation tank 2.

[0010] Hereinafter, description will be given with the floor surface 4 side of the sedimentation tank 2 defined as the lower side and the opening 5 side defined as the upper side. Further, a direction perpendicular to the up-down direction and parallel to the side walls 3 is defined as the front-rear direction, with the near side of the drawing sheet defined as the front side and the far side of the drawing sheet defined as the rear side. Furthermore, a direction perpendicular to the up-down direction and perpendicular to the side walls 3 is defined as the left-right direction, with the left side of the drawing sheet defined as the left direction and the right side of the drawing sheet defined as the right direction. The liquid introduced into the interior of the sedimentation tank 2 flows, for example, horizontally from the front to the rear in the front-rear direction. The sedimentation apparatus 1 of the present embodiment is an example of a horizontal flow apparatus, and the passage direction of the liquid to be treated with respect to the plurality of inclined plate modules 10 is the lateral direction (front-rear direction). However, the passage direction of the liquid is not limited to this, and for example, the liquid may pass in the up-down direction. The sedimentation apparatus 1 may be used as an upward flow apparatus.

[0011] As shown in Figure 1 and Figure 2, the plurality of inclined plate modules 10 are arranged in the sedimentation tank 2 so as to overlap in the up-down direction and the left-right direction, and further arranged so as to overlap in the front-rear direction. The plurality of inclined plate modules 10 in Figure 1 have a square shape in front view, but as shown in Figure 3, they may be rectangular. In this case, in the illustrated example, the inclined plate module 10 is a rectangle elongated in the left-right direction, but it may also be a rectangle elongated in the up-down direction. In the present embodiment, the vertically adjacent inclined plate modules 10 are arranged with their orientations in the left-right direction alternately switched, but as shown in Figure 4, the vertically adjacent inclined plate modules 10 may be arranged in the same orientation without switching the left-right direction.

[0012] <Inclined plate module> As shown in Figure 5 and Figure 6, 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 Figure 9). The frame 11 has a three-dimensional shape surrounding the plurality of inclined plates 12, specifically a rectangular parallelepiped shape (including a cubic shape). Further, in the inclined plate module 10, the depth in the front-rear direction determines the span of the support frame (for example, legs 51 described later) when installing the inclined plate module 10. For example, the larger the depth of the inclined plate module 10 in the front-rear direction, the larger the span of the support frame can be. Regarding the size of the inclined plates 12, the width of a standard inclined plate 12 in the front-rear direction is approximately 0.5 to 1.5 m. Therefore, in order to prevent the number of support frames from increasing, for example, by arranging the inclined plate modules 10 in two rows in the front-rear direction, the width of the inclined plates 12 in the front-rear direction is increased, and the span of the support frames is desirably set to approximately 1 to 3.0 m. This makes it possible to reduce the number of support frames. The span of the support frames is more preferably 1.8 to 2.2 m, and in this case, the number of support frames can be made appropriate.

[0013] <Frame> The frame 11 includes four front-rear members 20Y parallel to the front-rear direction, four up-down members 20Z parallel to the up-down direction orthogonal to the front-rear direction, and four left-right members 20X parallel to the left-right direction orthogonal to both the front-rear direction and the up-down direction. In this embodiment, the front and rear members 20Y, the upper and lower members 20Z, and the left and right members 20X are made of pipes 20 that extend in a uniaxial direction. The frame 11 comprises a plurality of pipes 20 and a plurality of joints 21 that connect the plurality of pipes 20. The left and right members 20X comprise a pair of first pipes 20A and a pair of third pipes 20C. The front and rear members 20Y comprise a pair of second pipes 20B and a pair of fourth pipes 20D. The upper and lower members 20Z comprise a pair of fifth pipes 20E and a pair of sixth pipes 20F. The multiple pipes 20 are formed from a metal that does not corrode or a resin with sufficient strength. Specifically, the multiple pipes 20 may be formed from, for example, stainless steel pipes (SUS pipes) or rigid polyvinyl chloride pipes (PVC pipes), and it is even more preferable that they be formed from a combination of rigid polyvinyl chloride pipes and stainless steel pipes.

[0014] A pair of first pipes 20A are positioned at a distance from each other in the front-to-back direction at the top of the frame 11 and extend in the left-to-right direction. A pair of second pipes 20B are positioned between the pair of first pipes 20A in the front-to-back direction and extend in the front-to-back direction. The pair of first pipes 20A and the pair of second pipes 20B are arranged in a square shape in plan view. A pair of third pipes 20C are positioned at a distance from each other in the front-to-back direction at the bottom of the frame 11 and extend in the left-to-right direction. A pair of fourth pipes 20D are positioned between the pair of third pipes 20C in the front-to-back direction and extend in the front-to-back direction. The pair of third pipes 20C and the pair of fourth pipes 20D are arranged in a rectangular shape in plan view. In the illustrated example, the pair of third pipes 20C and the pair of fourth pipes 20D are square in plan view, but they may also be rectangular.

[0015] A pair of fifth pipes 20E are positioned on the right side of the frame 11, between the right second pipe 20B and the right fourth pipe 20D, and extend vertically. The pair of fifth pipes 20E, the right second pipe 20B, and the right fourth pipe 20D are arranged in a square shape in a side view. The pair of sixth pipes 20F are positioned on the left side of the frame 11, between the left second pipe 20B and the left fourth pipe 20D, and extend vertically. The pair of sixth pipes 20F, the left second pipe 20B, and the left fourth pipe 20D are arranged in a rectangular shape in a side view. In the illustrated example, the pair of sixth pipes 20F, the left second pipe 20B, and the left fourth pipe 20D are square in a plan view, but they may also be rectangular.

[0016] Furthermore, among the first pipe 20A to the sixth pipe 20F, the lengths of the first pipe 20A to the fourth pipe 20D, which are frame members extending in the front-to-back and left-to-right directions, may be the same, and the lengths of the fifth pipe 20E to the sixth pipe 20F, which are frame members extending in the vertical direction, may also be the same as those of the first pipe 20A to the fourth pipe 20D, as shown in Figure 2. In this case, the frame 11 will be a cube. Also, as shown in Figure 3, the lengths of the fifth pipe 20E to the sixth pipe 20F may be smaller than the lengths of the first pipe 20A to the fourth pipe 20D. In this case, the frame 11 will be a rectangular parallelepiped that is flattened in the vertical direction.

[0017] Here, the lengths of the first pipe 20A to the fourth pipe 20D are preferably, for example, 500mm to 1300mm, and more preferably 800mm to 1100mm. Furthermore, the length of the 5th pipe 20E to the 6th pipe 20F (in other words, the height of the frame 11) is preferably 300mm to 1100mm, and even more preferably 400mm to 900mm. If the length of each pipe 20A to 20F is too small compared to the above range, the frame 11 will become too small, increasing the number of modules required during construction. This may lead to an increase in the number of transports and longer construction times, resulting in poor workability. On the other hand, if the length of each pipe 20A to 20F is too large compared to the above range, the frame 11 will become too large, resulting in poor workability during construction.

[0018] Multiple pipes 20 are joined at the convex corners of the frame 11, with the ends of three pipes 20 butted together in a convex angle. The ends of the three pipes 20 that are butted together in a convex angle are joined by being inserted into a joint 21. There are eight joints 21 at the convex corners of the frame 11. The joints 21 are made of a corrosion-resistant metal such as stainless steel (SUS) or a resin with sufficient strength such as polyvinyl chloride (PVC). As a result, the frame 11 is formed into a cube with corrosion resistance and strength by multiple pipes 20 and multiple joints 21. In this embodiment, a rectangular parallelepiped (hexahedron, a cube in the illustrated example) is used as a representative example of the three-dimensional shape of the frame 11, but the frame 11 may be formed into other three-dimensional shapes. Multiple inclined plates 12 are fixed to the frame 11. The frame 11 supports the multiple inclined plates 12 by enclosing them. The multiple inclined plates 12 do not protrude from the inside of the frame 11 to the outside of the frame 11.

[0019] <Slanted plate> As shown in Figures 5, 7, and 8, the multiple inclined plates 12 are arranged inside the frame 11. The inclined plates 12 are fixed to the frame 11 in a state where they are inclined from top to bottom inside the frame 11. The inclined plates 12 are formed in a sheet shape with an outer edge 12a that is rectangular in plan view, for example, from a resin such as PVC. The rigidity of the inclined plates 12 may be ensured, for example, by forming irregularities 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 forming to a thickness that ensures rigidity.

[0020] The inclined plate 12 has a first outer edge 12b and a second outer edge 12c at its outer edge 12a. The first outer edge 12b and the second outer edge 12c are positioned opposite each other on the outer edge 12a of the inclined plate 12. 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 both 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 Figure 6), which will be described later.

[0021] <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, for example, by extrusion molding of a thermoplastic resin or metal. The thermoplastic resin is not particularly limited, but PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), etc. The metal is not particularly limited, but stainless steel, etc., is preferred.

[0022] The main body 30 has a first part 33 and a second part 34. The first part 33 is fixed to the frame 11 via a second member 14, which will be described later. The second part 34 is integrally formed at the base end 33a of the first part 33. The second part 34 is inclined with respect to the first part 33 at an inclination angle θ1. Therefore, the first part 33 and the second part 34 are formed in a V-shape in cross-section. In this embodiment, an example in which the inclination angle θ1 is 120° will be described, but the inclination angle θ1 is not limited to 120°. By forming the first portion 33 and the second portion 34 in a V-shape in cross-section, the strength and rigidity of the main body 30 (i.e., the first member 13) can be increased.

[0023] A projection 31 extends from the base end 33a of the first part 33 along the second part 34. The projection 31 is spaced apart from the second part 34. The first outer edge 12b is inserted between the second part 34 and the projection 31. That is, the second part 34 and the projection 31 are fitted into the first outer edge 12b. The second part 34 and the projection 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 fitted into the first outer edge 12b. Also, the first member 13 is provided in a state fitted into the second outer edge 12c, similar to the first outer edge 12b.

[0024] 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 with the first member 13. This ensures the strength of the inclined plate 12 even when flocs are accumulated on it. In this embodiment, an example is described in which the first member 13 is connected in a fitted state to the first outer edge 12b and the second outer edge 12c, but it is not limited to this. 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.

[0025] <Second component> As shown in Figures 5, 6, and 9, the first member 13A is connected (fixed) to the frame 11 via the second member 14. Similarly, the first member 13B shown in Figure 8 is connected (fixed) to the frame 11 via the second member 14, just like the first member 13A. As shown in Figures 5, 6, and 9, 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. The following describes an example of attaching multiple second members 14 to a pair of first pipes 20A, based on Figures 6 and 10.

[0026] As shown in Figures 6 and 9, multiple second members 14 are attached along a pair of first pipes 20A at regular intervals. Each second member 14 comprises a body 40 and a protruding piece 41. The body 40 and protruding piece 41 of the second member 14 are integrally formed, similar to the first member 13, for example, by injection molding of a thermoplastic resin or metal. The thermoplastic resin is not particularly limited, but PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), etc. is preferred. The metal is not particularly limited, but stainless steel, etc. is preferred. Furthermore, it is preferable that the body 40 and protruding piece 41 of the second member 14 be made of the same material as the first member 13.

[0027] The main body 40 is formed in a cylindrical shape so that it can be fitted onto the first pipe 20A. The main body 40 is connected to the first pipe 20A with an adhesive (solvent) such as tetrahydrofuran (THF) when fitted onto the first pipe 20A. A protruding piece 41 is integrally formed on 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.

[0028] As shown in Figures 6, 7, and 9, the end portion 13Aa of the first member 13A is in contact with the protruding piece 41 of the second member 14. The first portion 33 of the end portion 13Aa is attached (connected) to the protruding piece 41 by the third member 15 (in this embodiment, a bolt 15a and a nut (not shown), but for example, a rivet or the like). The second member 14 is provided on the pair of first pipes 20A. Therefore, both ends 13Aa, 13Aa of the first member 13A are attached to the protruding piece 41 (i.e., the second member 14). Furthermore, both ends 13Ba, 13Ba of the first member 13B are attached to the protruding pieces 41 (second member 14), similar to both ends 13Aa, 13Aa of the first member 13A. As a result, the inclined plate 12 is attached to the frame 11 at an inclination angle θ1 (120° in this embodiment).

[0029] In this embodiment, an example in which the main body 40 of the second member 14 is formed in a cylindrical shape has been described, but the embodiment is not limited to this. As another example, the main body 40 of the second member 14 may be formed in a C-shaped cross-section. A second member 44 in which the main body 40 is formed in a C-shaped cross-section will be described with reference to Figure 10.

[0030] As shown in Figure 10, the second member 44 comprises a main body 45 with a C-shaped cross-section and a protruding piece 46. With this second member 44, for example, the main body 45 can be attached to the frame 11 by elastically deforming the main body 45. Therefore, the work of attaching the second member 44 to the frame 11 can be made even easier. The protruding piece 46 has a hole 47 through which the bolt 15a passes. The end portion 13Aa (see Figure 9) of the first member 13A is attached (connected) to the protruding piece 46 with a bolt 15a and a nut.

[0031] <Third component> The third member 15 is formed of, for example, a thermoplastic resin or a metal. The thermoplastic resin is not particularly limited, but PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), etc., are preferred. The metal is not particularly limited, but stainless steel, etc., is preferred. Furthermore, if a metal third member 15 is used, there is a risk that the third member 15 may interfere with the second member 14 or the first member 13, etc., causing wear on the second member 14 or the first member 13, etc. For this reason, the metal third member 15 may be insert-molded into the resin. In this embodiment, a bolt 15a and a nut are used as examples of the third member 15, but the invention is not limited to these. As another example, other members such as screws may be used for the third member 15.

[0032] As shown in Figures 5 to 7 and 9, the ends 13Aa, 13Aa of the first member 13A are attached to the second member 14 provided on the pair of first pipes 20A by bolts 15a and nuts. In other words, the ends 13Aa, 13Aa of the first member 13A are connected to the pair of first pipes 20A via the second member 14. Also, the 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 the ends 13Aa, 13Aa of the first member 13A.

[0033] Thus, both ends 13Aa, 13Aa of the first member 13A are attached to a pair of first pipes 20A and a pair of fifth pipes 20E via the second member 14. Also, both ends 13Ba, 13Ba of the first member 13B are attached to a pair of third pipes 20C and a pair of sixth pipes 20F via the second member 14. As a result, the first outer edges 12b and 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.

[0034] Multiple inclined plates 12 are arranged inside the frame 11 at an inclination angle θ1 (120°) from top to bottom. 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 are made strong enough to withstand the load acting from the inclined plates 12 when flocs are accumulated on the inclined plates 12.

[0035] Thus, the inclined plate module 10 is composed of a frame 11, multiple inclined plates 12, multiple first members 13, multiple second members 14, and multiple third members 15. As mentioned 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 fact that the frame 11 surrounds the multiple inclined plates 12 means that the inclined plates 12 do not protrude from the outside of the frame 11 from any of the faces that constitute the three-dimensional shape formed by the frame 11. Note that even if 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.

[0036] In this embodiment, an example is described in which multiple inclined plates 12 are fixed to the frame 11 via the first member 13A, the first member 13B, and the second member 14, but the embodiment is not limited to this. As another example, for instance, multiple notches (not shown) may be formed in the frame 11 at regular intervals with an inclination angle θ1 (120° in this embodiment), and the inclined plates 12 may be provided and fixed in the multiple notches.

[0037] In the inclined plate module 10, in which multiple inclined plates 12 are fixed to the frame 11 via the first member 13A, the first member 13B, and the second member 14, as shown in Figure 5, the multiple inclined plates 12 are arranged to be inclined parallel to each other and parallel to the second pipe 20B and the fourth pipe 20D of the four front and rear members 20Y. In a front view from the front and rear direction, the inclined plates 12 are inclined with respect to the fifth pipe 20E and the sixth pipe 20F of the upper and lower members 20Z, and extend from the top to the bottom towards the first side S1 in the left-right direction, that is, towards the sixth pipe 20F. The multiple inclined plates 12 are arranged at equal intervals in the left-right direction.

[0038] The inclination angle of the inclined plate 12 can be set appropriately within a range that promotes sedimentation, but preferably the inclination angle θ2 of the inclined plate 12 with respect to the left and right members 20X, which are the first pipe 20A and the third pipe 20C, in a front view is 45 to 70 degrees, and more preferably 58 to 62 degrees. Within this range of inclination angle θ2, it is possible to further promote sedimentation when the inclined plate module 10 is installed in the sedimentation tank 2. For example, if multiple inclined plates 12 are fixed to a frame 11 with a left-right pitch Lp1 of 100 mm, the vertical pitch Lp2 can be set to 173 mm, allowing the multiple inclined plates 12 to be fixed at an inclination angle θ2 of 60°. Furthermore, if the left-right pitch Lp1 is set to a distance other than 100 mm, the vertical pitch Lp2 can be increased or decreased accordingly (for example, by setting Lp2 = Lp1·tanθ2), allowing the multiple inclined plates 12 to be fixed at an inclination angle θ2 of 60°.

[0039] In such an inclined plate module 10, the upper end of the first inclined plate 12f, which is located on the side of the sixth pipe 20F that is the first side S1 in the left-right direction, is located between the two first pipes 20A that are located on the upper side of the four left-right members 20X. Also, the lower end of the first inclined plate 12f is located between the two sixth pipes 20F that are located on the first side S1 of the four upper-lower members 20Z. Of the multiple inclined plates 12, the lower end of the second inclined plate 12s, which is located furthest to the second side S2 in the left-right direction, is located between the two third pipes 20C located on the lower side of the four left-right members 20X, and the upper end of the second inclined plate 12s is located between the two fifth pipes 20E located on the second side S2 of the four upper-lower members 20Z. Furthermore, the first distance L1 in the left-right direction between the upper end of the first inclined plate 12f and the sixth pipe 20F of the two upper and lower members 20Z located on the first side S1, and the second distance L2 in the left-right direction between the lower end of the second inclined plate 12s and the fifth pipe 20E of the two upper and lower members 20Z located on the second side S2 are provided to be equal.

[0040] Such an inclined plate module 10 has an external shape corresponding to the frame 11 and is formed to a size that can be installed manually. As shown in Figure 12, the width W, which is the length of one side in the left-right direction perpendicular to the water flow (different from the direction of water flow), the height H, which is the length of one side in the up-down direction perpendicular to the water flow (different from the direction of water flow), and the depth D, which is the size in the front-back direction along the water flow (substantially parallel to the direction of water flow), are formed to a size that is easy to install manually. Although not particularly limited, it is desirable that the weight of the inclined plate module 10 be 50 kg or less. In this case, the installation work can be carried out by, for example, two people manually, resulting in good work efficiency.

[0041] The width W and height H of the inclined plate module 10 should preferably be between 0.3m and 1.2m. If it is too large, it will be difficult to install manually. On the other hand, if it is too small, the number of inclined plate modules 10 to be installed will increase, making installation more time-consuming. The depth length D of the inclined plate module 10 is preferably about 0.5m to 3.0m, and more preferably 1m to 2m. Having the depth length D within this range means that an excessive number of inclined plate modules 10 are not required, making installation easier by hand. Furthermore, if the depth length D of the inclined plate module 10 is within this range, the number of support legs 51 for installing the inclined plate module 10 at the bottom of the sedimentation tank 2 can be reduced, as will be described later.

[0042] <Connection Unit> As simplified in Figures 1, 5, and 11, multiple inclined plate modules 10 are stacked upwards by a connecting unit 50 and arranged in the left-right direction. The connecting unit 50 comprises multiple legs 51, multiple first joints 52, and multiple second joints 53.

[0043] As shown in Figures 1 and 11, multiple legs 51 are installed on the floor surface 4 of the sedimentation tank 2. The lower part 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. In this way, the inclined plate module 10 is installed on the floor surface 4 via the multiple legs 51. Multiple legs 51 fix the lower parts of multiple inclined plate modules 10 to the floor surface 4. The legs 51 are made of a corrosion-resistant metal such as SUS, or a resin with sufficient strength such as polyvinyl chloride (PVC).

[0044] As shown in Figure 11, the multiple first joints 52 fix the upper and lower inclined plate modules 10 together when the multiple inclined plate modules 10 are stacked on top of each other. The first joint 52 includes, for example, a first projection 55 and a second projection 56. The first projection 55 protrudes upward from a joint 21 (see Figure 5) provided on the upper part of the frame 11 of the inclined plate module 10. The first projection 55 has a hole (female part) 57 that opens on its upper surface. The second projection 56 protrudes downward from a joint 21 provided on the lower part of the frame 11 of the inclined plate module 10. The second projection 56 has a projection (male part) that can be inserted into the hole 57 of the first projection 55.

[0045] The second projection 56 of the upper inclined plate module 10 is inserted into the hole 57 of the first projection 55 of the lower inclined plate module 10. This allows the upper inclined plate module 10 to be stacked on top of the lower inclined plate module 10 in a stepped manner. In this way, by providing the inclined plate module 10 with multiple first projections 55 and multiple second projections 56, the inclined plate modules 10 can be easily stacked. The first joint 52 is made of a non-corrosive metal such as SUS, or a resin with sufficient strength such as polyvinyl chloride (PVC). As shown in Figure 5, the first joint 52 may be, for example, a connecting joint commonly known for fixing pipes together.

[0046] As shown in Figures 1 and 5, the multiple second joints 53 fix the left and right inclined plate modules 10 together 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 that are arranged in parallel. Alternatively, the second joints 53 fix the frames 11 of the inclined plate modules 10 that are arranged in parallel in the front-back direction. The second joint 53 is, for example, a connecting joint commonly known for fixing pipes together. The second joint 53 is made of a corrosion-resistant metal such as SUS, or a resin with sufficient strength such as polyvinyl chloride (PVC).

[0047] Multiple inclined plate modules 10 can be assembled on-site inside the sedimentation tank 2 by means of multiple legs 51, multiple first joints 52, and multiple second joints 53. In other words, the sedimentation device 1 is assembled inside the sedimentation tank 2 in a state where multiple inclined plate modules 10 are stacked inside the sedimentation tank 2 by means of multiple legs 51, multiple first joints 52, and multiple second joints 53.

[0048] <Structure of the inclined plate module> Multiple inclined plate modules 10 are stacked in at least one direction, either vertically, horizontally, or vertically, and connected by connecting units 50, thereby forming a structure within the sedimentation tank 2. However, the connecting units 50 are not mandatory and may be omitted. In the structure of this embodiment, as shown in Figure 13, multiple inclined plate modules 10 are stacked and connected in the vertical, horizontal, and front-to-back directions. The multiple inclined plate modules 10 have the same shape and structure. Multiple inclined plates 12 of each inclined plate module 10 are fixed to the frame 11 so that they have the same inclination angle θ2 and the same pitch.

[0049] In the structure shown in Figure 13, multiple inclined plate modules 10 are stacked vertically with their left-right directions reversed. Reversing the left-right direction means, for example, rotating the inclined plate module 10 180 degrees around an arbitrary vertical axis, thereby reversing its left and right orientation. As a result, in the inclined plate modules 10 stacked vertically, the inclination direction of the inclined plates 12 is reversed with each subsequent layer. In this structure, the left-right positions of the two upper and lower members 20Z located on the first side S1 of the lower inclined plate module 10 and the two upper and lower members 20Z located on the second side S2 of the upper inclined plate module 10 are aligned, thereby aligning the left-right positions of the upper end of each inclined plate 12 of the lower inclined plate module 10 and the lower end of each inclined plate 12 of the upper inclined plate module 10. Furthermore, by aligning the positions of the ends of the four left and right members 20X of adjacent inclined plate modules 10 in the left-right direction, the positions of the first side S1 end and the second side S2 end of each adjacent inclined plate 12 in the left-right direction are aligned. Furthermore, by aligning the rear ends of the four front and rear members 20Y of the inclined plate module 10 located at the front with the front ends of the four front and rear members 20Y of the inclined plate module 10 located at the rear, the rear ends of each inclined plate 12 located at the front are aligned with the front ends of the inclined plates 12 located at the rear.

[0050] Furthermore, multiple inclined plate modules 10 can be stacked with different dimensions in at least one of the following directions: depth D (front-to-back), height H (up-down), and width W (left-to-right). For example, the dimensions in each direction could be full size, half size, and quarter size. By using such sizes, it becomes easier to align the ends of each inclined plate 12 even when inclined plate modules 10 of different sizes are placed next to each other.

[0051] For example, in Figure 14, a base 10a is formed by stacking multiple full-size inclined plate modules 10 with a depth D, height H, and width W in the vertical, horizontal, and front-to-back directions. In addition, inclined plate modules 10 of different sizes are placed on one side of the base 10a in the horizontal direction and on one side in the vertical direction. Here, a half-size inclined plate module 10b with half the width W is placed adjacent to the base 10a on one side in the horizontal direction, a half-size inclined plate module 10c with half the height H is placed adjacent to the base 10a on one side in the vertical direction, and a quarter-size inclined plate module 10d with half the width W and height H is placed on the inclined plate module 10b adjacent to the inclined plate module 10c. In this way, when multiple inclined plate modules 10 are placed inside the sedimentation tank 2, the gap formed between them and the inner surface of the sedimentation tank 2 can be reduced. In this case, for example, the gap distance between the side wall 3 of the sedimentation tank 2 and the sedimentation device 1 can be the one specified in the water supply design guidelines, and the inclined plate modules 10b, 10c, and 10d can be arranged so that the gap distance is smaller than this value. Also, if there is a gap between the inclined plate 12 and the side wall 3, it is possible to fill the gap with a flow-blocking plate, for example.

[0052] <Installation method for inclined plate modules> Next, the construction method for the inclined plate module 10 will be explained based on Figures 1, 5, and 11. In the following explanation of the construction method for the inclined plate module 10, the multiple legs 51, the multiple first joints 52, and the multiple second joints 53 will be abbreviated as legs 51, first joints 52, and second joints 53. Furthermore, the first joint 52 will be described using the first projection 55 and the second projection 56 as examples. The first projection 55 and the second projection 56 will be described as being attached at the factory before shipment of the inclined plate module 10, but the first projection 55 and the second projection 56 may also be attached at the construction site.

[0053] As shown in Figures 1, 5, and 11, in the first step, legs 51 are installed on the floor surface 4 inside the sedimentation tank 2. After the legs 51 are installed on the floor surface 4 of the sedimentation tank 2, in the second step, the inclined plate module 10 to which the first projection 55 is attached is carried into the sedimentation 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 sedimentation tank 2 via the legs 51.

[0054] After the first inclined plate module 10 is installed on the legs 51, in the third step, the inclined plate module 10 with the first projection 55 and the second projection 56 attached is brought into the sedimentation tank 2 through the opening 5. The second projection 56 of the brought-in inclined plate module 10 is inserted into the hole 57 of the first projection 55 of the first inclined plate module 10. As a result, the second inclined plate module 10 is stacked on top of the first inclined plate module 10 inside the sedimentation tank 2. The third step is repeated sequentially. By repeating the third step sequentially, multiple inclined plate modules 10 are stacked on top of the second inclined plate module 10 inside the sedimentation tank 2.

[0055] Inside the sedimentation tank 2, multiple inclined plate modules 10 are stacked on the floor surface 4, and then multiple inclined plate modules 10 are arranged in parallel on the floor surface 4 in the left-right direction relative to the stacked multiple inclined plate modules 10. After the multiple inclined plate modules 10 are stacked and arranged in parallel in the left-right direction, in the fourth step, the frames 11 of the inclined plate modules 10 are fixed together with second joints 53. This completes the construction method for the inclined plate modules 10, in which multiple inclined plate modules 10 are stacked in multiple layers from the floor surface 4 inside the sedimentation tank 2.

[0056] According to the inclined plate module 10 of the embodiment described above, as shown in Figures 1 and 5, the multiple inclined plates 12 are enclosed by the frame 11. Therefore, the multiple inclined plates 12 cannot be prevented from protruding from the frame 11. This protects the multiple inclined plates 12 from the frame 11. Thus, damage to the inclined plates 12 during transportation or construction of the inclined plate module 10 can be prevented.

[0057] Furthermore, the first distance L1 between the upper end of the first inclined plate 12f and the two upper and lower members 20Z located on the first side S1 is equal to the second distance L2 between the lower end of the second inclined plate 12s and the two upper and lower members 20Z located on the second side S2. Therefore, when stacking multiple inclined plate modules 10 in the vertical direction, if the left and right directions are reversed, the left and right positions of the two upper and lower members 20Z located on the first side S1 in the lower inclined plate module 10 and the two upper and lower members 20Z located on the second side S2 in the upper inclined plate module 10 can be aligned, and the left and right positions of the upper end of the first inclined plate 12f in the lower inclined plate module 10 and the lower end of the second inclined plate 12s in the upper inclined plate module 10 can be aligned (see, for example, the enlarged views in Figures 2 and 3). This makes it less likely for water to drift and promotes sinking.

[0058] Here, as shown in Figures 6 and 9, the multiple first members 13, the multiple second members 14, and the multiple third members 15 may protrude outward from the frame 11. That is, the first members 13, the second members 14, and the third members 15 have the same strength and rigidity as the frame 11. This prevents damage to the inclined plate module 10 during transportation or construction, even if the multiple first members 13, the multiple second members 14, and the multiple third members 15 protrude outward from the frame 11.

[0059] Furthermore, as shown in Figures 5 to 7, the first outer edge 12b and the second outer edge 12c of the multiple inclined plates 12, which are opposite each other on either side of the plate 12, are fixed to the frame 11. This allows the inclined plates 12 to be stably fixed to the frame 11.

[0060] Furthermore, as shown in Figures 7 and 8, a first member 13A is provided on the first outer edge 12b of the inclined plate 12. Thus, the first outer edge 12b can be reinforced with the first member 13A. Also, a first member 13B is provided on the second outer edge 12c of the inclined plate 12. Thus, the second outer edge 12c can be reinforced with the first member 13B. This makes it even more effective to prevent damage to the inclined plate 12 during transportation or construction of the inclined plate module 10.

[0061] Furthermore, as shown in Figures 1 and 8, when multiple inclined plate modules 10 are installed in the sedimentation tank 2, for example, the first outer edge 12b is positioned at the upper end and the second outer edge 12c at the lower end. This makes it less likely for the liquid in the sedimentation tank 2 to pass through the inclined plate module 10 in the front-to-back direction (i.e., the horizontal direction in which the first outer edge 12b and the second outer edge 12c extend) to be obstructed by the first member 13A and the first member 13B. In contrast, if, for example, 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 obstructed by the first member 13A and the first member 13B.

[0062] Furthermore, as shown in Figures 6 and 7, 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. Thus, 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.

[0063] Furthermore, if the frame 11 is made of multiple resin pipes joined together with joints 21, the inclined plate module 10 can be made lighter, making it easier to install when setting it in the sedimentation tank 2.

[0064] Furthermore, according to the construction method of the sinking device 1 and inclined plate module 10 of the embodiments described above, as shown in Figures 1 and 5, the inclined plate module 10 is constructed such that the frame 11 surrounds the multiple inclined plates 12. Therefore, the inclined plates 12 cannot be prevented from protruding from the frame 11. As a result, the multiple inclined plates 12 are protected by the frame 11. Thus, damage to the inclined plates 12 during transportation of the inclined plate module 10 can be prevented. Furthermore, by stacking multiple inclined plate modules 10 inside the sedimentation tank 2, the inclined plate modules 10 can be stacked without damaging the inclined plate 12.

[0065] In addition, the inclined plate modules 10, which are pre-equipped with multiple inclined plates 12, can be stacked on the floor 4 inside the sedimentation tank 2. Therefore, the work of assembling the frame 11 inside the sedimentation tank 2 and the work of attaching the multiple inclined plates 12 to the assembled frame 11 can be eliminated. Furthermore, there is no need to provide scaffolding for workers inside the sedimentation tank 2 necessary for assembling the frame 11 and attaching the multiple inclined plates 12. This reduces the man-hours required during construction when stacking the inclined plate modules 10 in the sedimentation tank 2.

[0066] Furthermore, the inclined plate module 10 of this embodiment is used in a transverse flow sinking device, in which multiple inclined plates 12 of each inclined plate module 10 are arranged inclined parallel to each other at equal intervals, and the first distance L1 of the first inclined plate 12f and the second distance L2 of the second inclined plate 12s are set to be equal. Therefore, when the inclined plate modules 10 are stacked vertically, the upper and lower ends of the inclined plates that are positioned adjacent to each other vertically, including the first inclined plate 12f and the second inclined plate 12s, can be aligned. When the inclined plate modules 10 are stacked front to back, the rear and front ends of the inclined plates that are positioned adjacent to each other front to back, including the first inclined plate 12f and the second inclined plate 12s, can be aligned. As a result, even when multiple inclined plate modules 10 are stacked vertically and / or front to back, the flow of liquid is less likely to be obstructed near the upper and lower ends of the vertical inclined plates 12, or near the front and rear ends of the front to back inclined plates 12, making it less likely for water to become unevenly distributed around each end and promoting sedimentation.

[0067] In the sinking device 1 of this embodiment, multiple inclined plate modules 10 are stacked vertically with their left-right directions reversed. As a result, the inclination directions of the inclined plates 12 of the vertically stacked inclined plate modules 10 alternately reverse, allowing the plates of the inclined plates 12 to be arranged continuously, thereby promoting sinking.

[0068] If the size of some of the inclined plate modules 10 and the remaining modules 10 differs in at least one direction (front-to-back, up-and-down, and left-to-right), it becomes possible to install the multiple inclined plate modules 10 without gaps, according to the size of the sedimentation tank 2. This makes it less likely for water to flow unevenly and promotes sedimentation.

[0069] It should be noted that the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, although the above embodiment was described using an example of a lateral flow sinking device 1, the inclined plate module 10 of the present invention can also be used in an upward flow sinking device. Furthermore, although the above describes an example in which multiple inclined plate modules 10 are stacked in the vertical, horizontal, and front-to-back directions, the arrangement is not particularly limited. For example, one inclined plate module 10 may be installed in the sedimentation tank 2. Alternatively, multiple inclined plate modules 10 may be stacked in only one direction, or they may be stacked in two directions, such as vertical and horizontal. Furthermore, although the above describes an example in which multiple inclined plate modules 10 are stacked in the vertical, horizontal, and front-to-back directions, the arrangement is not particularly limited. For example, one inclined plate module 10 may be installed in the sedimentation tank 2. Alternatively, multiple inclined plate modules 10 may be stacked in only one direction, or they may be stacked in two directions, such as vertical and horizontal.

[0070] 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 Figures 15 and 16, the frame 11 may be provided with a plurality of angle members 60 (e.g., angle steel) instead of a plurality of pipes 20. For example, if the angle members 60 are made of steel, they may be shaped steel (e.g., angle steel) as listed in Table 1 of JIS G 3192:2014. Also, the material of the angle members 60 is not limited to steel, but may be resin. Even in the case of resin angle members 60, L-shaped angles and the like can 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 with bolts or rivets, for example. In the modified examples shown in Figures 15 and 16, the angle member 60 comprises a first piece 60a and a second piece 60b. The angle member 60 is a so-called L-shaped angle, and in a side view taken from the left and right directions, the first piece 60a and the second piece 60b are perpendicular to each other. The first piece 60a is fixed to the first part 33 of the first member 13. The first piece 60a and the first part 33 are fixed together, for example, by adhesive. The first part 33 and the second part 34 of the first member 13 are inclined at an inclination angle θ3 in a front view taken from the front and rear directions. The inclination angle θ3 is, for example, 60 degrees. The second part 34 is fixed to the inclined plate 12 via a third member 15. The third member 15 includes a bolt 15a and a nut 15b. Furthermore, pipe 20 is not limited to round pipes; it may also be a square pipe. For example, if the frame 11 is equipped with multiple pipes 20 (round pipes, square pipes as shown in the modified example in Figure 17) or multiple angle members 60, the inclined plate module 10 can effectively exhibit the necessary strength in situations such as (1) when workers stand on the inclined plate module 10 during construction, or (2) when stacking the inclined plate modules 10, the lower inclined plate module 10 supports the weight of the inclined plate module 10 placed on top. If the multiple pipes 20 are square pipes, the cross-sectional shape of the pipes 20 may be, for example, rectangular (square or rectangular).

[0071] Furthermore, it is possible to replace the components in this embodiment with well-known components as appropriate, without departing from the spirit of the present invention.

[0072] (Note) The above embodiment can be understood, for example, as follows:

[0073] <1> An inclined plate module according to one aspect of the present invention comprises a rectangular parallelepiped frame and a plurality of inclined plates fixed to the frame, wherein the frame includes four front and rear members parallel to the front-rear direction, four upper and lower members parallel to the upper and lower direction perpendicular to the front-rear direction, and four left and right members parallel to the left and right direction perpendicular to both the front-rear and upper and lower directions, and surrounds the plurality of inclined plates, the plurality of inclined plates are parallel to each other and parallel to the front and rear members, inclined with respect to the upper and lower members in a front view from the front-rear direction, extending toward the first side in the left-right direction as from the top to the bottom, and arranged at equal intervals in the left-right direction, and among the plurality of inclined plates, the first inclined plate is the one located furthest toward the first side in the left-right direction The upper end of the inclined plate is located between the two upper left and right members of the four left and right members, and the lower end of the first inclined plate is located between the two upper and lower members of the four upper and lower members, and the lower end of the second inclined plate, which is located furthest to the second side in the left-right direction among the plurality of inclined plates, is located between the two lower left and right members of the four left and right members, and the upper end of the second inclined plate is located between the two upper and lower members of the four upper and lower members, and the distance in the left-right direction between the upper end of the first inclined plate and the two upper and lower members of the first side is equal to the distance in the left-right direction between the lower end of the second inclined plate and the two upper and lower members of the second side.

[0074] With the inclined plate module, the frame encloses multiple inclined plates, preventing them from protruding from the frame. Therefore, multiple inclined plates can be protected by the frame. This prevents damage to the inclined plates during transportation or installation of the module. Furthermore, the lateral distance between the upper end of the first inclined plate and the two upper and lower members located on the first side is equal to the lateral distance between the lower end of the second inclined plate and the two upper and lower members located on the second side. Therefore, for example, when stacking multiple inclined plate modules vertically, if the lateral direction is reversed, the lateral positions of the two upper and lower members located on the first side in the lower inclined plate module and the two upper and lower members located on the second side in the upper inclined plate module can be aligned, thereby aligning the lateral positions of the upper end of the first inclined plate in the lower inclined plate module and the lower end of the second inclined plate in the upper inclined plate module. This makes it less likely for water to drift and can promote sinking.

[0075] <2> the above <1> In the inclined plate module relating to the above, the inclined plate is rectangular in plan view, and the first and second outer edges of the inclined plate that are opposite each other on either side of the inclined plate may be fixed to the frame.

[0076] In this way, the first and second outer edges, which are opposite each other on either side of the inclined plate, are fixed to the frame. This allows the inclined plate to be stably fixed to the frame.

[0077] <3> the above <2> The inclined plate module relating to this comprises a first member provided on the first outer edge and the second outer edge, and the first member may be connected to the frame.

[0078] As described above, the first member is provided on the first outer edge and the second outer edge of the inclined plate. Therefore, the first and second outer edges can be reinforced with the first member. This makes it possible to more effectively prevent damage to the inclined plate during transportation or construction of the inclined plate module.

[0079] Furthermore, when the inclined plate module is installed in the sedimentation tank, for example, the first outer edge and the second outer edge are positioned at the upper or lower end. This makes it less likely for the liquid in the sedimentation tank to pass through the inclined plate module horizontally (in the direction in which the first and second outer edges extend) to be obstructed by the first member. In contrast, if, for example, the first and second outer edges are located at both ends in the horizontal direction, the passage of liquid through the inclined plate module may be obstructed by the first member.

[0080] <4> the above <3> The inclined plate module relating to this may include a second member attached to the frame, to which both ends of the first member are connected.

[0081] 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.

[0082] <5> the above <1> from <4> An inclined plate module according to any one embodiment may have a frame comprising a plurality of resin pipes and joints connecting the plurality of pipes.

[0083] This allows for a lighter inclined plate module, making it easier to install in the sedimentation tank.

[0084] <6> the above <1> from <5> In any one embodiment of the inclined plate module, the inclination angle of the inclined plate with respect to the left and right members in a front view is preferably 45 to 70 degrees.

[0085] This method allows for greater sedimentation while the inclined plate module is installed in the sedimentation tank.

[0086] <7> the above <1> from <6> An inclined plate module according to any one of the above embodiments may be used in a lateral flow sinking device or in an upward flow sinking device.

[0087] In each inclined plate module, multiple inclined plates are arranged parallel to each other at equal intervals, with the first distance of the first inclined plate and the second distance of the second inclined plate being equal. Therefore, when inclined plate modules are stacked vertically, the upper and lower ends of inclined plates that are adjacent to each other vertically, including the first and second inclined plates, can be aligned. When inclined plate modules are stacked front to back, the rear and front ends of inclined plates that are adjacent to each other front to back, including the first and second inclined plates, can be aligned. As a result, even when multiple inclined plate modules are stacked vertically and / or front to back, the flow of liquid is less likely to be obstructed near the upper and lower ends of the vertical inclined plates, or near the front and rear ends of the front to back inclined plates, making it less likely for water to become uneven around each end and promoting sedimentation.

[0088] <8> A sedimentation device according to one aspect of the present invention is as described above. <1> from <7> The system comprises an inclined plate module according to any one of the embodiments thereof, and a sedimentation tank in which a plurality of the inclined plate modules are stacked inside.

[0089] According to the sinking device, the inclined plate module is designed so that the inclined plates do not protrude from the frame, as the frame encloses the multiple inclined plates. Thus, the multiple inclined plates are protected by the frame. This prevents damage to the inclined plates during the transportation of the inclined plate module. Furthermore, by stacking multiple inclined plate modules inside the sedimentation tank, the modules can be stacked without damaging the inclined plates.

[0090] <9> the above <8> The sinking device may be configured such that a plurality of the inclined plate modules are stacked in the vertical direction with their left-right orientations reversed.

[0091] In this way, the inclination directions of the inclined plates of the stacked inclined plate modules alternate in opposite directions, allowing the plates of the inclined plates to be arranged in a continuous pattern, thereby promoting sinking.

[0092] <10> the above <8> or <9> In the sinking device relating to the above, among the plurality of inclined plate modules, some of the inclined plate modules and the remaining inclined plate modules may have different sizes in at least one of the front-to-back direction, the up-and-down direction, and the left-to-right direction.

[0093] In this way, multiple inclined plate modules can be installed without gaps, depending on the size of the sedimentation tank. This reduces the likelihood of uneven water flow and promotes sedimentation.

[0094] <11> A method for constructing an inclined plate module according to one aspect of the present invention is as described above. <1> from <6> Multiple inclined plate modules according to any one of the embodiments are stacked in the sedimentation tank.

[0095] According to the construction method for the inclined plate module, the inclined plate module is constructed so that the inclined plates do not protrude from the frame, as the frame encloses multiple inclined plates. Therefore, the multiple inclined plates are protected by the frame. This prevents damage to the inclined plates during transportation of the inclined plate module. Furthermore, by stacking multiple inclined plate modules in the sedimentation tank, the modules can be stacked without damaging the inclined plates.

[0096] Furthermore, inclined plate modules, each pre-equipped with multiple inclined plates, can be stacked in the sedimentation tank. This eliminates the need to assemble the frame inside the sedimentation tank and to attach the multiple inclined plates to the assembled frame. Moreover, it eliminates the need to provide scaffolding for workers inside the sedimentation tank for assembling the frame and attaching the multiple inclined plates. This reduces the labor required during construction when stacking inclined plate modules in the sedimentation tank. [Explanation of Symbols]

[0097] 1... Settling 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, 12f... First inclined plate, 12s... Second inclined plate, 13... First member, 13A... First member, 13B... First member, 13Aa... Both ends of the first member, 13Ba... Both ends of the first member, 14, 44... Second member, 20X... Left and right members, 20Y... Front and rear members, 20Z... Up and down members, 20... Pipe, S1... First side, S2... Second side.

Claims

1. A frame that forms a rectangular prism shape, The frame comprises a plurality of inclined plates fixed to the frame, The frame includes four front and rear members parallel to each other in the front-to-back direction, four upper and lower members parallel to each other in the vertical direction perpendicular to the front-to-back direction, and four left and right members parallel to each other in the left-to-right direction perpendicular to both the front-to-back and vertical directions, and encloses the plurality of inclined plates. The plurality of inclined plates are parallel to each other and parallel to the front and rear members, and in a front view from the front and rear directions, they are inclined with respect to the upper and lower members, extending toward the first side in the left-right direction as they move from the top to the bottom, and are arranged at equal intervals in the left-right direction. Of the plurality of inclined plates, the upper end of the first inclined plate located furthest to the first side in the left-right direction is located between the two upper left-right members of the four left-right members, and the lower end of the first inclined plate is located between the two upper and lower members of the four upper and lower members of the first side. Of the plurality of inclined plates, the lower end of the second inclined plate located furthest to the second side in the left-right direction is located between the two lower left-right members of the four left-right members, and the upper end of the second inclined plate is located between the two upper and lower members of the four upper and lower members of the second side. The distance in the left-right direction between the upper end of the first inclined plate and the two upper and lower members located on the first side is equal to the distance in the left-right direction between the lower end of the second inclined plate and the two upper and lower members located on the second side. Inclined plate module.

2. The inclined plate is rectangular in plan view, Of the outer edges of the inclined plate, the first outer edge and the second outer edge that face each other across the inclined plate are fixed to the frame. The inclined plate module according to claim 1.

3. The first member is provided on the first outer edge and the second outer edge, The first member is connected to the frame. The inclined plate module according to claim 2.

4. The frame is attached to a second member to which both ends of the first member are connected, The inclined plate module according to claim 3.

5. The inclined plate module according to claim 1, wherein the frame comprises a plurality of resin pipes and joints connecting the plurality of pipes.

6. The inclined plate module according to claim 1, wherein the inclination angle of the inclined plate with respect to the left and right members in a front view is 45 degrees to 70 degrees.

7. An inclined plate module according to claim 1, used in a sedimentation device for transverse flow.

8. An inclined plate module according to any one of claims 1 to 7, The system comprises a sedimentation tank in which multiple inclined plate modules are stacked inside, A sinking device.

9. The sinking device according to claim 8, wherein a plurality of the inclined plate modules are stacked in the vertical direction with their left-right directions reversed.

10. The sinking device according to claim 8, wherein, among the plurality of inclined plate modules, some of the inclined plate modules and the remaining inclined plate modules have different sizes in at least one of the front-to-back direction, the up-and-down direction, and the left-to-right direction.

11. Multiple inclined plate modules according to any one of claims 1 to 7 are stacked in a sedimentation tank. Installation method for inclined plate modules.

Images