Water storage and drainage device

Abstract

To provide a water storage and drainage system capable of actualizing easy and efficient maintenance management.SOLUTION: A water storage and drainage system 30 includes a pair of fixed frames 31 arranged opposed to each other, a first partition plate 33 mounted to the pair of fixed frames 31 and including a water passing port 32 on the lower side for water to pass therethrough, and a second partition plate 60 arranged on the upstream side of the first partition plate 33 while being spaced therefrom, the second partition plate 60 including a plurality of orifices 36 (36a, 36b) set at different positions in the height direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a water storage and drainage device. [Background technology]

[0002] In recent years, localized heavy rains have become more frequent due to changes in weather conditions. It is necessary to prevent the paralysis of urban and regional functions caused by flooding due to such localized heavy rains. For this reason, rainwater storage pipes are installed under roads and other locations to temporarily store rainwater and prevent sewer pipes from overflowing. In rainwater storage pipes, orifices are provided in spaces such as connecting manholes to release water downstream while regulating the flow rate, and wire mesh to prevent debris from getting stuck in the orifices may be installed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-57633 A [Patent Document 2] JP 2017-179824 A Summary of the Invention [Problem to be solved by the invention]

[0004] The debris screen installed at the orifice is at risk of being blocked by excess debris such as dead leaves or plastic bags. The screen is located under the wall (near the bottom of the pipe). The height of the shaft walls is about 1 to 2 meters, depending on the size of the shaft. Because the water is murky, the debris stuck to the screen may be difficult to see. When the water is full, it is difficult to remove the debris. There is a method to remove the deposits from the net using a long pole from the top of the shaft, but this is dangerous because it requires working from a high place. There is also a method to remove the deposits from the net by diving underwater, but this is dangerous because there is a risk that the water flow will suddenly become stronger after the deposits are removed.

[0005] When maintaining the storage pipe after a localized heavy rain, the amount of water that flows out of the small opening of the orifice is small, making it difficult to discharge impurities. One way to discharge the water all at once is to remove the partitions one by one, but this is very time-consuming. If there is only one orifice, and that orifice becomes clogged with debris or other material during heavy rain, the area upstream will become flooded, which could impair the planned function of storing water at the ground surface.

[0006] FIG. 8 shows an example of a conventional water storage and drainage device. In the conventional water storage and drainage device 130, a partition plate 133 is attached to a pair of fixed frames 131, one orifice 136 is provided at the bottom of the partition plate 133, and a net 134 is attached to the orifice 136. In such a conventional configuration, as described above, if excessive garbage adheres to the net 134 and the entire net 134 is blocked, the upstream becomes full of water, making it difficult to remove the garbage. In addition, after the garbage is removed, the outflow of water may suddenly become stronger, and an unexpected event may occur. As shown in FIG. 8, when the water storage and drainage device 130 has one orifice 136, there is a risk that the orifice 136 may be blocked by garbage or other adhesions during heavy rain.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a water storage and drainage device that can be easily and efficiently maintained. [Means for solving the problem]

[0008] In order to solve the above problems and achieve the above object, the present invention employs the following aspects. (1) A water storage and drainage device according to one aspect of the present invention is A pair of fixed frames disposed opposite each other; A first partition plate attached to the pair of fixed frames and having a water passage opening downward through which water passes; a second partition plate disposed on the upstream side of the first partition plate with a gap therebetween; Equipped with The second partition plate has a plurality of orifices arranged at different positions in the height direction. (2) In the embodiment described in (1) above, An upper end of the second partition plate may be lower than an upper end of the first partition plate. (3) In the aspect described in (1) or (2) above, The apparatus further includes a third partition plate disposed between the first partition plate and the second partition plate and having an orifice at a lower portion thereof, The upper end of the third partition plate is lower than the upper end of the first partition plate, An upper end of the second partition plate may be lower than an upper end of the third partition plate. (4) In the aspect described in (3) above, The third partition plate may be raised and lowered along a guide frame provided on the pair of fixed frames. Effect of the Invention

[0009] According to the present invention, it is possible to provide a water storage and drainage device that can be easily and efficiently maintained. [Brief description of the drawings]

[0010] [Figure 1] 1 is a plan view showing an example of a drainage facility including a water storage and drainage device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of FIG. [Diagram 3] FIG. 2 is a schematic perspective view of an example of a water storage and drainage device according to the embodiment, as viewed from the upstream side. [Figure 4] 2 is a schematic perspective view of an example of a water storage and drainage device according to the embodiment, seen from the downstream side. FIG. [Diagram 5] FIG. 11 is a schematic diagram showing an example in which a plurality of orifices are provided in a second partition plate. [Figure 6] FIG. 13 is a schematic perspective view for explaining the lifting and lowering of the third partition plate in the embodiment, showing a state before the second partition plate is lifted and lowered. [Figure 7]FIG. 13 is a schematic perspective view for explaining the elevation of the third partition plate in the embodiment, showing a state after the second partition plate has been elevated or lowered. [Figure 8] FIG. 1 is a schematic perspective view showing an example of a conventional water storage and drainage device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a water storage and drainage device according to an embodiment of the present invention will be described with reference to the drawings. In the following description, components common to the present embodiment will be designated by the same reference numerals, and duplicated descriptions thereof may be omitted.

[0012] The water storage and drainage device according to this embodiment will be described with reference to Figs. 1 to 7. Fig. 1 is a plan view showing an example of a drainage facility 1 equipped with a water storage and drainage device according to this embodiment. Fig. 2 is a cross-sectional view of Fig. 1. For example, a combined sewer pipe 4 is buried underground 3 of a trunk road 2 or the like, so that sewage such as rainwater 17 and sewage 20 merge along the trunk road 2. A drainage pipe 6 for rainwater 17 and a drainage pipe 6 for sewage 20 are buried underground 3 of a street 5 connected to the trunk road 2 along the street 5. This drainage pipe 6 merges into a sewer pipe 4. Manholes 7, 8 (manholes) are installed at the junction of the sewer pipe 4 and the drainage pipe 6, or at the junction of the drainage pipes 6.

[0013] There are multiple types of standard dimensions for sewer pipes 4 and drainage pipes 6, and the optimum standard dimensions are selected at the time of installation, taking into consideration the average rainfall conditions in the area. Since multiple systems of drainage pipes 6 are connected to the sewer pipes 4, sewer pipes 4 with a larger diameter than the drainage pipes 6 are used.

[0014] The drainage system 1 uses a drainage pipe 6 and a rainwater storage pipe 12 having a larger diameter than the drainage pipe 6. The drainage pipe 6 and the rainwater storage pipe 12 are connected to a vertical shaft 13 buried in the ground 3.

[0015] The drainage pipe 6 is sized according to the rainfall conditions in the area. The rainwater storage pipe 12 has a diameter and length that is designed to store rainwater 17 from localized heavy rain and to have a storage capacity that can store the amount of rainwater runoff suppression determined by each local government. In this case, the rainwater storage pipe 12 is made to be a long pipe with a sufficiently larger diameter than the sewer pipe 4. The rainwater storage pipe 12 is appropriately installed in place of the drainage pipe 6, upstream of the junction of the drainage pipe 6 with the sewer pipe 4.

[0016] The water storage and drainage device 30 according to this embodiment is provided inside the shaft 13. Inside the shaft 13, the water storage and drainage device 30 divides the space into a space 14 (storage side space) on the rainwater storage pipe 12 side and a space 15 (drainage side space) on the drainage pipe 6 side. In addition, rainwater 17 and sewage 20 flow in the direction of the arrows in the figure. For example, in Figure 2, rainwater 17 flows from space 14 to space 15. That is, the space 14 side is the upstream side, and the space 15 side is the downstream side. Also, in Figure 2, the main road 2 is on the upper side, and the underground 3 is on the lower side.

[0017] The water storage and drainage device 30 according to this embodiment will be described in detail. The water storage and drainage device 30 comprises a pair of fixed frames 31 arranged opposite to each other, a first partition plate 33 attached to the pair of fixed frames 31 and equipped with a water passage port 32 through which water passes downward, and a second partition plate 60 arranged at an interval on the upstream side of the first partition plate 33. The second partition plate 60 comprises a plurality of orifices 36 installed at different positions in the height direction.

[0018] Fig. 3 is a schematic perspective view of an example of the water storage and drainage device 30 as viewed from the upstream side. Fig. 4 is a schematic perspective view of an example of the water storage and drainage device 30 as viewed from the downstream side.

[0019] The pair of fixed frames 31 are integrally formed on the bottom surface of the shaft 13 and the side surface of the shaft 13. As shown in FIG. 3 and FIG. 4, the pair of fixed frames 31 are disposed so that their respective side surfaces face each other. The fixed frames 31 are made of, for example, concrete. A vertical groove 47 is provided on each side surface of the fixed frames 31 facing each other, into which a first partition plate 33 described later is fitted. The vertical groove 47 is, for example, concave when viewed from above the fixed frames 31. The vertical groove 47 is not provided to the bottom of the fixed frames 31. The vertical groove 47 may be provided to the bottom of the fixed frames 31. There is a space between the upper end of the pair of fixed frames 31 and the upper surface inside the shaft 13. That is, the height of the pair of fixed frames 31 is lower than the height inside the shaft 13. The distance between the pair of fixed frames 31 is, for example, 80 cm to 2 m, depending on the diameter of the shaft 13.

[0020] 3 and 4, the first partition plate 33 is attached to the vertical grooves 47 on the respective side surfaces of the pair of fixed frames 31. The first partition plate 33 is disposed so that the front surface of the first partition plate 33 is in the vertical direction. The front surface of the first partition plate 33 is the surface facing the upstream side. The first partition plate 33 has a water passage port 32 below through which water (rainwater 17) passes. A plurality of first partition plates 33 may be fitted into the vertical grooves 47 of the pair of fixed frames 31 so as to be stacked vertically. By stacking the first partition plates 33 vertically, the maximum water storage capacity can be adjusted. The first partition plate 33 may be a single piece. The height of the first partition plate 33 is equal to or less than the height of the pair of fixed frames 31. The first partition plate 33 is rectangular or flat, and is made of, for example, fiber-reinforced resin. The first partition plate 33 and the pair of fixed frames 31 may be integrated together.

[0021] Since the vertical groove 47 is not provided to the bottom of the fixed frame 31, when the first partition plate 33 is fitted, a gap (water passage opening 32) is formed below the first partition plate 33. Rainwater 17 flows from the upstream of the first partition plate 33 through this water passage opening 32 to the downstream. The water passage opening 32 is rectangular. The vertical length (height) of the water passage opening 32 is preferably about 5 cm to 30 cm, depending on the drainage amount. Providing the water passage opening 32 at such a height makes it possible to raise the third partition plate 37 described below and discharge the rainwater 17 downstream in one go. The horizontal length (width) of the water passage opening 32 is the distance between the pair of fixed frames 31. The height of the water passage opening 32 has a more preferable upper limit of 20 cm, since discharging too much rainwater 17 in one go may exceed the storage capacity of the downstream space 15. When the vertical groove 47 is provided to the bottom of the fixed frame 31 and the first partition plate 33 is fitted to the bottom of the fixed frame 31, a through hole may be formed in the lower part of the first partition plate 33 to serve as the water passage port 32. In this case, the through hole (water passage port 32) is, for example, rectangular, circular or elliptical. In this case, the height and width of the through hole are preferably approximately the same as the size of the water passage port 32 when the first partition plate 33 is not fitted to the bottom of the fixed frame 31 described above.

[0022] The water storage and drainage device 30 includes a second partition plate 60. The second partition plate 60 is disposed on the upstream side of the first partition plate 33 with a gap therebetween. For example, the second partition plate 60 is preferably disposed on the upstream side of the first partition plate 33 with a gap of about 10 cm to 100 cm. By setting the gap between the second partition plate 60 and the first partition plate 33 to 40 cm to 100 cm, a space for performing work such as cleaning can be secured between the second partition plate 60 and the first partition plate 33. The second partition plate 60 is, for example, flat and made of fiber-reinforced resin. The second partition plate 60 contacts the bottom part inside the shaft 13 and the side surface inside the shaft 13. The second partition plate 60 includes a plurality of orifices 36 (36a, 36b) that are disposed at different positions in the height direction. The orifices 36 (36a, 36b) will be described in detail later. When the stored water is discharged from the first partition plate 33, the stored water is accumulated on the upstream side of the second partition plate 60 to the height of the second partition plate 60. Therefore, the upper end (height) of the second partition plate 60 is desirably at a height that allows an operator to bend down and easily perform cleaning work, etc. The height of the second partition plate 60 is preferably lower than the upper end (height) of the first partition plate 33. The height of the second partition plate 60 is preferably 30 cm to 100 cm. This makes it possible to easily perform work such as removing garbage downstream of the second partition plate 60. The horizontal length (width) of the second partition plate 60 is a length that allows it to be attached to the side surface inside the vertical shaft 13. The height and width of the second partition plate 60 are the height and width, respectively, when the second partition plate 60 is viewed from above.

[0023] The second partition plate 60 is provided with a plurality of orifices 36 (36a, 36b) that are set at different positions in the height direction. The orifices 36 (36a, 36b) penetrate the second partition plate 60. The orifices 36 (36a, 36b) are, for example, circular. The opening area of ​​one orifice 36 (36a, 36b) is 10 cm 2 From 100cm 2 The opening area of ​​the orifice 36 (36a, 36b) is preferably equal to or larger than the opening area of ​​the orifice 36 (36c) of the third partition plate 37 described later. The shape of the orifice 36 (36a, 36b) is not limited to a circular shape and may be, for example, an ellipse or a rectangle. In FIG. 5, the orifice 36 (36a, 36b) is circular.

[0024] As shown in Fig. 5, the multiple orifices 36 (36a, 36b) have different set positions in the height direction when the second partition plate 60 is viewed in a plane. The set positions in the height direction of the orifices 36 (36a, 36b) are the position (height) of the center of gravity of the orifices 36 (36a, 36b) from the lower end of the second partition plate 60 (the lower end when the second partition plate 60 is viewed in a plane). In Fig. 5, the height of the orifice 36a is represented by Ha, and the height of the orifice 36b is represented by Hb. The height Ha of the orifice 36a is different from the height Hb of the orifice 36b. 5, the orifice 36a and the orifice 36b may partially overlap in the height direction. The orifice 36a and the orifice 36b do not have to overlap in the height direction. Since the heights of the orifices 36 (36a, 36b) in the height direction are different, the stored water is dispersed and discharged to the orifices 36 (36a, 36b). In this case, the adhesion of impurities such as garbage to the net 34 (34a, 34b) described later is dispersed, so clogging can be suppressed.

[0025] The orifices 36 (36a, 36b) are spaced apart from each other at intervals X in the lateral direction when the second partition plate 60 is viewed in plan. a-b There is a gap of X a―b is the distance between the orifice 36a and the orifice 36b in the horizontal direction. As shown in FIG. 5, the orifice 36a and the orifice 36b may not overlap each other in the horizontal direction. a-b In order to prevent a plurality of orifices from being blocked simultaneously by impurities such as dust, the distance is preferably 10 cm to 150 cm, and more preferably the lower limit is 30 cm. The orifices 36a and 36b may overlap in the horizontal direction.

[0026] In this embodiment, two orifices 36 (36a, 36b) are used, but the number of orifices 36 is not limited to 2. The number of orifices 36 is determined in consideration of the storage capacity of the vertical shaft 13, the opening area of ​​the orifices 36, the size of the second partition plate 60, etc.

[0027] As shown in FIG. 3, a mesh 34 (34a, 34b) is attached to the orifice 36 on the upstream side of the second partition plate 60 so as to cover the orifice 36 (36a, 36b). The mesh 34 (34a, 34b) is larger than the opening of the orifice 36 (36a, 36b). The mesh 34 (34a, 34b) prevents clogging due to impurities such as garbage mixed in the rainwater 17. The mesh 34 (34a, 34b) is, for example, flat or basket-shaped. The mesh size of the mesh 34 (34a, 34b) is sufficiently smaller than the opening of the orifice 36 (36a, 36b). The mesh 34 is made of, for example, metal.

[0028] The water storage and drainage device 30 according to this embodiment has a second partition plate 60 having a plurality of orifices 36 (36a, 36b) spaced apart from each other and set at different height positions upstream of the first partition plate 33. When the stored water is discharged from the first partition plate 33, the stored water is stored upstream of the second partition plate 60. A worker enters between the first partition plate 33 and the second partition plate 60 to perform work such as removing garbage. According to the water storage and drainage device 30 according to this embodiment, it is possible to easily perform work such as removing garbage downstream of the second partition plate 60. In addition, when one of the orifices 36 (for example, the orifice 36a) is clogged with garbage or the like, the other orifice 36 (for example, the orifice 36b) at a different height functions to enable the water to be discharged downstream. In this way, according to the water storage and drainage device 30 of this embodiment, maintenance can be easily and efficiently performed.

[0029] The third partition plate 37 may be further provided between the first partition plate 33 and the second partition plate 60, and provided with an orifice 36 (36c) at the bottom. The third partition plate 37 is disposed upstream of the first partition plate 33 and downstream of the second partition plate 60. The third partition plate 37 is, for example, flat and made of fiber-reinforced resin. The lower end of the third partition plate 37 is in contact with the bottom surface inside the vertical shaft 13. The third partition plate 37 is installed at a position where it blocks the water passage port 32 against the rainwater 17 flowing from the upstream. In other words, the upper end (height) of the third partition plate 37 is higher than the upper end of the water passage port 32. The third partition plate 37 is installed so as to overlap part of the first partition plate 33 in the height direction.

[0030] The upper end (height) of the third partition plate 37 is preferably lower than the upper end (height) of the first partition plate 33. The lateral length (width) of the third partition plate 37 is a length that enables attachment to a pair of guide frames 35 described below. Note that the height and width of the third partition plate 37 are the height and width, respectively, when the third partition plate 37 is viewed in a plan view. The orifice 36c provided in the third partition plate 37 faces the water passage port 32 below the first partition plate 33. The orifice 36c penetrates the third partition plate 37. The orifice 36c provided in the third partition plate 37 is provided at a height equivalent to the water passage port 32 below the first partition plate 33. The shape of the orifice 36c is not limited to a circular shape, and may be, for example, an elliptical shape or a rectangular shape. Moreover, the height of the orifice 36c provided in the third partition plate 37 is equal to the height of the multiple orifices 36a, 36b provided in the second partition plate 60.

[0031] The upper end (height) of the second partition plate 60 is preferably lower than the upper end (height) of the third partition plate 37. The height of the second partition plate 60 is the height of the third partition plate 37 -1 cm to -30 cm.

[0032] An invert (not shown) may be provided in the orifice 36 (36a, 36b). By providing the invert in the orifice 36 (36a, 36b), the rainwater 17 flowing in from the upstream can flow smoothly.

[0033] The third partition plate 37 may be disposed on the upstream side of the first partition plate 33 with a gap therebetween. The gap between the first partition plate 33 and the third partition plate 37 is, for example, 10 cm to 100 cm. When the first partition plate 33 and the third partition plate 37 are in contact with each other (the gap between the first partition plate 33 and the third partition plate 37 is 0), scratches will occur on the contact surface of the first partition plate 33 and the third partition plate 37 when the third partition plate 37 moves up and down. Therefore, the gap between the first partition plate 33 and the third partition plate 37 is preferably 20 cm or more. If the gap between the first partition plate 33 and the third partition plate 37 is too wide, the installation area of ​​the water storage and drainage device 30 will increase, so the gap between the first partition plate 33 and the third partition plate 37 is preferably 60 cm or less. In this way, the third partition plate 37 is positioned upstream of the first partition plate 33 with a gap between them, thereby preventing scratches from occurring on the contact surface between the first partition plate 33 and the third partition plate 37 when the third partition plate 37 is raised and lowered.

[0034] As shown in Fig. 6 and Fig. 7, the third partition plate 37 is provided on a pair of guide frames 35 provided on a pair of fixed frames 31, and moves up and down along the guide frames 35. Fig. 6 is a schematic perspective view for explaining the lifting and lowering of the third partition plate 37, showing a state before the third partition plate 37 moves up and down (a state in which the third partition plate 37 is in contact with the ground), and Fig. 7 shows a state after the third partition plate 37 moves up and down. The guide frame 35 is provided on the upstream side of the pair of fixed frames 31.

[0035] The third partition plate 37 is connected to a partition plate elevator 40, and the third partition plate 37 can be raised and lowered by operating the partition plate elevator 40. The partition plate elevator 40 has, for example, an elevation handle 41 at the top and a support rod 42 that supports the elevation handle 41. The elevation handle 41 is set at a height that allows work to be done without getting wet even when the vertical shaft 13 is full of water. In order to operate the partition plate elevator 40 more easily, it is preferable that the elevation handle 41 protrudes above ground. The support rod 42 is rotatably fixed to the bottom surface of the vertical shaft 13. The surface of the support rod 42 has, for example, a threaded portion 42A that is threaded. The third partition plate 37 has a threaded portion 37A that is threadedly engaged with the threaded portion 42A of the support rod 42.

[0036] With the threaded portion 42A of the support rod 42 and the threaded portion 37A of the third partition plate 37 screwed together, the third partition plate 37 can be raised and lowered by operating (rotating) the lifting handle 41 of the partition plate elevator 40. When maintaining the storage pipe, the third partition plate 37 can be raised, so that rainwater 17 and impurities such as garbage can be discharged downstream in one go. After the discharge, work such as cleaning the net, which will be described later, can be performed inside the safe vertical shaft 13 where the water level has dropped. In this embodiment, two partition plate elevators 40 are installed to connect to both ends of the width of the third partition plate 37, as shown in Figures 6 and 7, for example, but the number of partition plate elevators 40 installed on the third partition plate 37 is not limited to two.

[0037] Although the embodiment of the present invention has been described above, the above embodiment is presented as an example, and the scope of the present invention is not limited to the above embodiment. The above embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The above embodiment and its modifications are included in the scope of the invention and its equivalents described in the claims, as well as the scope and gist of the invention. In addition, when there are terms such as "almost," "equivalent," and "degree," they are used to mean including the degree or accuracy that is commonly accepted. [Explanation of symbols]

[0038] 30 Water storage and drainage device 31 Fixed Frame 32 Water Inlet 33 First partition 34, 34a, 34b net 35 Guide frame 36, 36a, 36b, 36c Orifice 37 Third partition plate 40 Partition board lift 60 Second partition plate

Claims

1. A pair of fixed frames disposed opposite each other; A first partition plate attached to the pair of fixed frames and having a water passage opening downward through which water passes; a second partition plate disposed upstream of the first partition plate with a gap therebetween; Equipped with The second partition plate has a plurality of orifices that are installed at different positions in a height direction, The first partition plate is disposed adjacent to and parallel to the second partition plate, The pair of fixing frames are provided with vertical grooves, and the first partition plate is fitted into the vertical grooves, The second partition plate is disposed outside the longitudinal groove. A rainwater storage and drainage system installed underground.

2. The rainwater storage and drainage device according to claim 1, characterized in that an upper end of the second partition plate is lower than an upper end of the first partition plate.

3. The apparatus further includes a third partition plate disposed between the first partition plate and the second partition plate and having an orifice at a lower portion thereof, The upper end of the third partition plate is lower than the upper end of the first partition plate, The upper end of the second partition plate is lower than the upper end of the third partition plate.

3. The rainwater storage and drainage system according to claim 1 or 2, wherein the rainwater storage and drainage system is provided underground.

4. The rainwater storage and drainage device installed underground according to claim 3, wherein the third partition plate moves up and down along a guide frame provided on the pair of fixed frames.

5. The water storage and drainage device is provided inside a vertical shaft, The second partition plate is in contact with the bottom surface of the inside of the vertical shaft. The rainwater storage and drainage device according to any one of claims 1 to 4, which is provided underground.

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