Sewer

Abstract

To provide a sewer capable of removing accumulated matter.SOLUTION: A sewer 1 comprises a sewer pipe 10, a flow path 14 provided at a bottom of the sewer pipe 10, and projections 16a, 16b provided on side walls 14a, 14b of the flow path 14. The flow path 14 has two side walls 14a, 14b, and the projections 16a, 16b are provided on both of the side walls 14a, 14b. In either of the side walls 14a, 14b, a plurality of the projections 16a or the projections 16b is provided.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 sewer channel according to the present invention is configured to include a sewer pipe, a flow path provided at the bottom of the sewer pipe, and an overhang provided on a side wall of the flow path.

[0006] The sewer channel configured as described above includes a sewer pipe, a flow path provided at the bottom of the sewer pipe, and an overhang provided on a side wall of the flow path.

[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 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)). [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. 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, and overhangs 16a and 16b.

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

[0022] Also, three of the five overhangs 16a and three of the five overhangs 16b are shown in Figure 2. Referring to Figure 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.

[0023] 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.

[0024] It is preferable that L is equal to or greater than (1 / 2)Y and equal to or less than 12Y.

[0025] 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.).

[0026] The material of the flow path 14 may be concrete, unlined, stone-lined, steel, iron, wood (wooden trough), or resin.

[0027] 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.

[0028] 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.

[0029] Next, the operation of the embodiment of the present invention will be described.

[0030] Figure 3 is a plan view of the flow path 14 to explain the operation of an embodiment of the present invention, and shows a state in which sediment 20 has accumulated (Figure 3(a)), a state in which sediment 20 has begun to be removed from the flow path 14 (Figure 3(b)), a state in which sediment 20 continues to be removed from the flow path 14 (Figure 3(c)), and a state in which sediment 20 has been largely removed from the flow path 14 (Figure 3(d)).

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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).

[0035] According to the embodiment of the present invention, the overhangs 16a and 16b remove material (for example, sediment 20) deposited in the sewer channel 1.

[0036] 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)).

[0037] <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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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. [Explanation of symbols]

[0042] 1 Sewer 2 water surface 10 Sewer pipe 12 Invert 14 Flow path 14a, 14b side wall 16a, 16b overhang 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 sewer equipped with

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.

Images