Lower water passage

Abstract

To remove matters deposited in a sewage channel.SOLUTION: A sewer 1 includes a sewer pipe 10, a flow passage 14 provided in a bottom part of the sewer pipe 10, an overhang 14a and a 16b provided in a sidewall 14b and a 16a of the flow passage 14, and a projection part 17 provided in a bottom 14c of the flow passage 14. The convex portion 17 is provided on the downstream side of the overhanging 16a (or the 16b). The flow path 14 has two side walls 14a and 14b, and the overhanging 16a and 16b are provided on both the side walls 14a and 14b. Each of the side walls 14a and 14b is provided with an overhanging 16a or a plurality of overhanging 16b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the removal of pollutants from sewerage systems. [Background technology]

[0002] When pollutants including sediment accumulate in a sewer channel (see, for example, FIG. 1 of Patent Document 1), the flow becomes poor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5166309 specification Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, an object of the present invention is to remove material deposited in sewer channels. [Means for solving the problem]

[0005] The sewerage channel of the present invention comprises a sewer pipe, a flow path provided at the bottom of the sewer pipe, a protrusion provided on a side wall of the flow path, and a convex portion provided at the bottom of the flow path, and is configured so that the convex portion is provided downstream of one of the protrusions.

[0006] The sewer channel configured as described above is provided with a sewer pipe. A flow path is provided at the bottom of the sewer pipe. An overhang is provided on a side wall of the flow path. A convex portion is provided at the bottom of the flow path. The convex portion is provided downstream of one of the overhangs.

[0007] In the sewer channel according to the present invention, the flow path may have two side walls, and the overhang may be provided on both of the side walls.

[0008] In addition, the sewer channel according to the present invention may be configured such that a plurality of the protrusions are provided on any of the side walls.

[0009] In the sewer channel according to the present invention, the flow path may have two side walls, and the overhang may be provided on only one of the side walls.

[0010] The sewer channel according to the present invention may be configured to have a plurality of the projections. [Brief explanation of the drawings]

[0011] [Figure 1] 1(a) and 1(b) are diagrams showing the structure of a sewerage channel 1 according to an embodiment of the present invention, and are a plan view of the sewerage channel 1 (FIG. 1(a)), a bb cross-sectional view of FIG. 1(a) (FIG. 1(b)), and a cc cross-sectional view of FIG. 1(b) (FIG. 1(c)). [Figure 2] FIG. 1(c) is a partially enlarged view of FIG. [Figure 3] 3(a) is a plan view of a flow path 14 for explaining the operation of an embodiment of the present invention, showing a state in which sediment 20 has accumulated (FIG. 3(a)), a state in which sediment 20 has begun to be removed from the flow path 14 (FIG. 3(b)), a state in which sediment 20 continues to be removed from the flow path 14 (FIG. 3(c)), and a state in which sediment 20 has been largely removed from the flow path 14 (FIG. 3(d)). [Figure 4] FIG. 10 is a plan view of a modified example of the flow path 14 in which the flow path 14 is curved. [Figure 5] 5A and 5B are enlarged partial plan views of the flow path 14 for explaining the operation of an embodiment of the present invention, showing the state in which the convex portion 17 has begun to remove the sediment 20 (FIG. 5A), and the state in which the convex portion 17 has finished removing the sediment 20 (FIG. 5B). DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] Fig. 1 shows the structure of a sewerage channel 1 according to an embodiment of the present invention, including a plan view of the sewerage channel 1 (Fig. 1(a)), a cross-sectional view taken along line bb of Fig. 1(a) (Fig. 1(b)), and a cross-sectional view taken along line cc of Fig. 1(b) (Fig. 1(c)). Fig. 2 is a partially enlarged view of Fig. 1(c).

[0014] The sewer channel 1 according to the embodiment of the present invention includes a sewer pipe 10, an invert 12, a flow path 14, overhangs 16a and 16b, and a convex portion 17.

[0015] The sewer pipe 10 is a pipe that extends in a predetermined direction (for example, the horizontal direction of the paper in FIG. 1) and through which sewage flows. In the embodiment of the present invention, the sewer pipe 10 has a circular cross section as shown in FIG. 1(b), but other shapes such as a rectangle or an oval may also be considered.

[0016] An invert 12 is provided at the bottom of the sewer pipe 10. A flow path 14 is provided in the invert 12. The sewage flows through the flow path 14. In the embodiment of the present invention, the cross section of the flow path 14 is rectangular as shown in FIG. 1(b), but it is also possible to consider other shapes such as a trapezoid or semicircular shape.

[0017] In the embodiment of the present invention, an invert 12 is provided, but if the sewer pipe 10 has a small diameter, is rectangular, trapezoidal, or the like, the invert 12 may be omitted.

[0018] Most of the water surface 2 (see FIG. 1(b)) of the sewage flowing through the sewer pipe 10 remains within the flow path 14. The flow path 14 also has two side walls 14a and 14b.

[0019] In the case where the invert 12 is not installed inside the sewer pipe 10, it is also possible to omit the side walls 14a and 14b of the flow path 14.

[0020] An overhang 16a is provided on the side wall 14a of the flow path 14. An overhang 16b is provided on the side wall 14b of the flow path 14. In this manner, the overhangs 16a and 16b are provided on both the side walls 14a and 14b. Furthermore, a plurality of overhangs 16a or 16b (for example, five of each, as shown in FIG. 1) are provided on each of the side walls 14a and 14b. However, it is also conceivable to provide only one overhang 16a or one overhang 16b.

[0021] The convex portion 17 is provided on the bottom 14c of the flow path 14. The convex portion 17 is provided downstream of any one of the five overhangs 16a (or any one of the five overhangs 16b). With reference to FIG. 1(c), for example, the leftmost convex portion 17 is provided downstream of the leftmost overhang 16a (or the leftmost overhang 16b). For example, the rightmost convex portion 17 is provided downstream of the rightmost overhang 16a (or the rightmost overhang 16b).

[0022] The height of the protrusion 17 is lower than the height of the overhangs 16a and 16b.

[0023] In addition, if the installation of the invert 12 on the sewer pipe 10 is omitted, the convex portion 17 and the projections 16a and 16b may be installed on the inner surface of the sewer pipe 10.

[0024] 1(c), three of each of the five protrusions 17 and overhangs 16a and 16b are shown. Referring to FIG. 2, in the embodiment of the present invention, the spacing W between the overhangs 16a and 16b, the spacing L between adjacent overhangs 16a (or 16b), the overhang length Y of the overhangs 16a and 16b, and the width X of the overhangs 16a and 16b are all the same for all of the overhangs 16a and 16b.

[0025] However, "equal" is merely an example, and they may be different. For example, the distance L between the left-end overhang 16a (16b) and the central overhang 16a (16b) may be different from the distance L between the right-end overhang 16a (16b) and the central overhang 16a (16b). Similarly, the overhang length Y of one overhang 16a (16b) may be different from the overhang length Y of another overhang 16a (16b), or the width X of one overhang 16a (16b) may be different from the width X of another overhang 16a (16b). The distance W between the left-end overhangs 16a and 16b, the distance W between the central overhangs 16a and 16b, and the distance W between the right-end overhang 16a (16b) may be different.

[0026] It is preferable that L is equal to or greater than (1 / 2)Y and equal to or less than 12Y.

[0027] 2, the planar shape of the overhangs 16a, 16b is preferably rectangular for ease of manufacturing and adjustment after installation. However, taking into consideration the state of the sewage flow that removes the sediment 20 created by the overhangs 16a, 16b to the right (downstream), the planar shape of the overhangs 16a, 16b may be a semicircle, semi-ellipse, triangle, catenary curve, or quadratic curve (hyperbola, parabola, etc.).

[0028] The material of the flow path 14 may be concrete, unlined, stone-lined, steel, iron, wood (wooden trough), or resin.

[0029] Furthermore, as shown in FIG. 1(b), when the cross section of the flow path 14 is rectangular, it is preferable that the overhangs 16a and 16b be rectangular as shown in FIG. 1(b) for ease of manufacturing and installation work.

[0030] Furthermore, when the cross section of the flow path 14 is not rectangular (for example, trapezoidal or semicircular), the front shape of the overhangs 16a and 16b may be polygonal, such as a triangle, an inverted triangle, a right-angled triangle, an inverted right-angled triangle, or a trapezoid, in addition to the rectangular shape of the overhangs 16a and 16b in Figure 1(b), taking into account the shape of the flow path 14 and the characteristics of the sewage flow, or may be a shape formed by a quadratic curve such as a quarter circle, a quarter ellipse, a hyperbola, or a parabola.

[0031] Furthermore, it is preferable that the distance between the protrusion 17 and the side wall 14a is equal to the distance between the protrusion 17 and the side wall 14b. However, the former and latter distances may be different. That is, the protrusion 17 may be disposed closer to the side wall 14b than to the side wall 14a, or conversely, the protrusion 17 may be disposed closer to the side wall 14a than to the side wall 14b.

[0032] The distance in the flow direction (left-right direction in FIG. 2) between the convex portion 17 and any of the protrusions 16a (or any of the protrusions 16b) closest to the convex portion 17 may be set to 0 or more and L / 2 or less.

[0033] Furthermore, it is preferable that the maximum width of the protrusions 17 (however, the width in the vertical direction in FIG. 2) is W. The widths of the protrusions 17 may be the same or different. That is, the protrusions 17 may have a plurality of different widths; for example, one protrusion 17 may have a width W, while another protrusion 17 may have a width of 0.9W.

[0034] The shape of the protrusions 17 is preferably a cylinder, hemisphere, cone, pyramid or convex polyhedron, but may also be an indefinite natural shape such as unprocessed wood or stone.

[0035] The material of the protrusions 17 is preferably concrete, steel, iron, aluminum, stainless steel or resin, but may also be stone or wood.

[0036] Next, the operation of the embodiment of the present invention will be described.

[0037] 3A and 3B are plan views of the flow path 14 for explaining the operation of an embodiment of the present invention, showing a state in which sediment 20 has accumulated (FIG. 3A), a state in which the sediment 20 has begun to be removed from the flow path 14 (FIG. 3B), a state in which the sediment 20 continues to be removed from the flow path 14 (FIG. 3C), and a state in which the sediment 20 has been mostly removed from the flow path 14 (FIG. 3D). However, for convenience of illustration, the protrusions 17 are omitted from FIGS. 3A, 3B, and 3C.

[0038] First, referring to FIG. 3(a), matter having a larger specific gravity than sewage (for example, earth and sand 20) has accumulated in the flow path 14.

[0039] Next, referring to FIG. 3(b), the sewage flowing from left to right through the flow path 14 is subject to a large change in flow direction (e.g., nearly a right angle) due to the corners of the overhangs 16a and 16b, causing the flow of the sewage to become turbulent. The sewage continues to flow turbulently as it passes near the corners of the overhangs 16a and 16b. Furthermore, the cross-section of the flow path 14 becomes smaller at the locations where the overhangs 16a and 16b are installed, and the flow velocity of the sewage increases as it passes between the overhangs 16a and 16b. This turbulence and increased flow velocity of the sewage creates removal areas 22a and 22b, where sediment 20 is swept away. Furthermore, this turbulence and increased flow velocity of the sewage not only removes sediment that accumulates in the removal areas 22a and 22b, but also prevents sediment 20 carried by the sewage flowing from left to right from accumulating.

[0040] Next, referring to FIG. 3(c), a portion of the sewage that passes between the overhangs 16a and 16b flows along the corners of the overhangs 16a and 16b, passing by the sidewall 14a or 14b, toward the next overhang 16a and 16b. This flow creates removal areas 24a and 24b into which sediment 20 is washed away. Furthermore, the sewage that flows downstream without following the corners of the overhangs 16a and 16b changes direction significantly (for example, at a right angle) at the corner of the next overhang 16a and 16b, causing the flow of the sewage to become turbulent. While maintaining this turbulent state, the sewage flows to the right (downstream) near the corner of the overhangs 16a and 16b, washing away sediment 20 and further expanding the removal areas 22a and 22b. The flows in the removal areas 22a, 22b and the removal areas 24a, 24b further wash away the sediment 20, thereby expanding the removal areas 22a, 22b, 24a, 24b to the central portion of the flow path 14.

[0041] 3(d), further sediment 20 is swept away from areas adjacent to removal areas 22a, 22b and removal areas 24a, 24b, creating removal area 26. Removal area 26 covers almost the entire flow path 14 (although some sediment 20 may remain in the center of flow path 14).

[0042] According to the embodiment of the present invention, the overhangs 16a and 16b remove material (for example, sediment 20) that has accumulated in the sewer channel 1.

[0043] Specifically, removal areas 22a and 22b are created by the turbulent flow of sewage flowing around the corner of overhang 16a and overhang 16b (see FIG. 3(b)). Furthermore, removal areas 24a and 24b are created by the sewage flowing along the next corner of overhang 16a and overhang 16b and near side walls 14a and 14b (see FIG. 3(c)). Furthermore, removal areas 22a and 22b and removal areas 24a and 24b expand, creating removal area 26 (see FIG. 3(d)).

[0044] However, as shown in FIG. 3(d), earth and sand 20 remains near the center of the flow path 14.

[0045] 5A and 5B are partially enlarged plan views of the flow path 14 for explaining the operation of an embodiment of the present invention, showing a state in which the convex portion 17 has started to remove sediment 20 (FIG. 5A), and a state in which the convex portion 17 has finished removing sediment 20 (FIG. 5B). However, for the sake of convenience, FIG. 5 only shows the vicinity of one convex portion 17. Furthermore, the flows Fa, Fb, and Fc are merely rough representations of the flows.

[0046] 5(a), the flow Fc flowing from the upstream side of the convex portion 17 toward the convex portion 17 goes around the outer periphery of the convex portion 17 and flows toward the downstream side of the convex portion 17. As shown in FIG.

[0047] Furthermore, flow Fa passing near overhangs 16a and 16b on the left side collides with the left corner of adjacent overhangs 16a and 16b on the right and heads toward convex portion 17. Part of flow Fa branches off into flow Fb that flows along side walls 14a and 14b at the right corner of overhangs 16a and 16b on the left side. Flow Fb also collides with the left corner of adjacent overhangs 16a and 16b on the right and heads toward convex portion 17. When flows Fa and Fb collide with convex portion 17, the flow becomes turbulent, causing sediment 20 to fly up into the sewer.

[0048] The blown up earth and sand 20 is carried downstream by the flow Fc, and finally, as shown in FIG. 5(b), the earth and sand 20 is carried away (however, some of it may remain downstream of the convex portion 17).

[0049] <Modification> In the embodiment of the present invention, the flow channel 14 is linear, but it may be curved. Fig. 4 is a plan view of the flow channel 14 in a modified example in which the flow channel 14 is curved.

[0050] In FIG. 4, the flow path 14 is curved, with the side wall 14a located on the outside of the curve and the side wall 14b located on the inside of the curve.

[0051] The flow path 14 has two side walls 14a, 14b. There is no overhang 16a, and only one of the side walls (side wall 14b) has an overhang 16b. A plurality of overhangs 16b (for example, three) are provided.

[0052] Since soil 20 (not shown) accumulates on the inside of the curve, the overhang only needs to be located on the inside of the curve.

[0053] The protrusion 17 is provided downstream of any of the three projections 16b.

[0054] In addition, if the curve is slight relative to a straight line and deposition occurs on both sides of the flow path 14, it is also possible to arrange the overhangs 16a and 16b on both sides of the side walls 14a and 14b in the same way as the straight flow path 14.

[0055] In this case, the convex portion 17 is provided downstream of either one of the overhangs 16a or one of the overhangs 16b. [Explanation of symbols]

[0056] 1 Sewer 2 water surface 10 Sewer pipe 12 Invert 14 Flow path 14a, 14b side wall 14c Bottom (of the channel) 16a, 16b overhang 17 Convex part 20 Earth and Sand 22a, 22b, 24a, 24b, 26 removal area

Claims

1. Sewer pipes and a flow path provided at the bottom of the sewer pipe; a protrusion provided on a side wall of the flow channel; a convex portion provided at the bottom of the flow channel; Equipped with The convex portion is provided downstream of any one of the overhangs. Sewer.

2. The sewer according to claim 1, the flow channel having two side walls; A sewer wherein the overhang is provided on both of the side walls.

3. The sewer according to claim 2, A sewer channel having a plurality of the projections on any of the side walls.

4. The sewer according to claim 1, the flow channel having two side walls; A sewer in which the overhang is provided on only one of the side walls.

5. The sewer according to claim 4, A sewer having a plurality of the above-mentioned overhangs.

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