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 on the lower side for water to pass therethrough, a second partition plate 37 having an orifice 36 provided on the lower part, and a rope 34 mounted to the second partition plate 37 so as to cover the orifice 36. The second partition plate 37 moves up and down along a guide frame 35 provided on the pair of fixed frames 31.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 rainfall has become more frequent due to changes in weather conditions. It is necessary to prevent flooding caused by such localized heavy rainfall from paralyzing the functions of cities and regions. To this end, rainwater storage pipes are installed under roads and elsewhere to temporarily store rainwater and prevent sewer pipes from overflowing. Rainwater storage pipes have orifices in connecting manholes or other spaces to regulate the flow of water downstream and release it. Wire mesh is sometimes installed around the orifices to prevent them from becoming clogged with dead leaves, debris, and other debris. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-57633 [Patent Document 2] Japanese Patent Application Publication No. 2017-179824 Summary of the Invention [Problem to be solved by the invention]

[0004] The debris screen installed at the orifice is at risk of becoming clogged if excessive debris such as dead leaves or plastic bags adheres to it. The screen is located below the wall (near the bottom of the pipe). The height of the shaft wall is about 1 to 2 meters, depending on the size of the shaft. Because the water is murky, it may be difficult to see the debris stuck to the screen. When the water is full, it is difficult to remove the debris. One method is to remove the deposits from the net using a long pole from the top of the shaft, but this is dangerous as it requires working from a high place. Another method is to remove the deposits from the net by diving underwater, but this is also dangerous as there is a risk that the water outflow will suddenly become stronger after the deposits have been removed.

[0005] When maintaining the storage pipe after a localized heavy rain, the small opening of the orifice limits the amount of water that flows out, making it difficult to release impurities. One way to release all the water at once is to remove the partitions one by one, but this is extremely time-consuming.

[0006] FIG. 9 shows an example of a conventional water storage and drainage device. A conventional water storage and drainage device 130 has a partition plate 133 attached to a pair of fixed frames 131, an orifice 136 provided below the partition plate 133, and a net 134 attached to the orifice 136. With this conventional configuration, as described above, excessive debris can adhere to the net 134, causing the entire net 134 to become clogged, making it difficult to remove. Since debris must be removed from above the fixed frame 131 using a rod or the like, this work must be done from a high place, making it difficult to do. In addition, after the debris is removed, the water flow may suddenly increase, potentially resulting in unexpected events.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is 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 arranged opposite to each other; a first partition plate attached to the pair of fixing frames and having a water passage opening downward through which water passes; a second partition plate having an orifice provided at its lower portion; a mesh attached to the second partition plate so as to cover the orifice; Equipped with The second partition plate moves up and down along guide frames provided on the pair of fixed frames. (2) In the embodiment described in (1) above, The second partition plate may be disposed upstream of and spaced from the first partition plate. (3) In the embodiment described in (1) or (2) above, The storage tank may further include a seal member disposed between an upper end of the first partition plate and an upper end of the second partition plate. (4) In the embodiment according to any one of (1) to (3) above, A work table may be provided above the pair of fixed frames. [Effects 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 explanation 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. [Figure 2] FIG. 2 is a cross-sectional view of FIG. 1. [Figure 3] 2 is a schematic perspective view of an example of a water storage and drainage device according to the embodiment, seen from the upstream side. FIG. [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. [Figure 5] FIG. 10 is a schematic perspective view for explaining the lifting and lowering of the second partition plate in the embodiment, showing a state before the second partition plate is lifted and lowered. [Figure 6] FIG. 10 is a schematic perspective view for explaining the lifting and lowering of the second partition plate in the embodiment, showing the state after the second partition plate has been lifted and lowered. [Figure 7] 1A and 1B are schematic perspective views showing an example in which a sealing member is attached to the second partition plate in the same embodiment, where (a) shows a case in which a flat sealing member is attached as the sealing member, and (b) shows a case in which an elastic sealing member is attached as the sealing member. [Figure 8] FIG. 10 is a schematic diagram showing an example in which a work table is installed above the fixed frame in the embodiment. [Figure 9]FIG. 1 is a schematic perspective view showing an example of a conventional water storage and drainage device. DETAILED DESCRIPTION OF THE INVENTION

[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 redundant description thereof will be omitted.

[0012] The water storage and drainage device according to this embodiment will be described with reference to FIGS. Fig. 1 is a plan view showing an example of drainage equipment 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 under a trunk road 2 or the like, so that sewage such as rainwater 17 and sewage 20 merge along the trunk road 2. Drainage pipes 6 for rainwater 17 and sewage 20 are buried underground 3 under streets 5 connected to the trunk road 2, along the street 5. These drainage pipes 6 merge into the sewer pipe 4. Manholes 7, 8 (manholes) are installed at the junctions of the sewer pipe 4 and the drainage pipe 6, and at the junctions of the drainage pipes 6.

[0013] There are several types of standard sizes for sewer pipes 4 and drainage pipes 6, and the most suitable standard size is 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, the sewer pipes 4 are larger in diameter than the drainage pipes 6.

[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 underground 3.

[0015] The dimensions of the drainage pipe 6 are determined 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 control set by each local government. In this case, the rainwater storage pipe 12 is made to be a long pipe with a diameter that is sufficiently larger than the sewer pipe 4. The rainwater storage pipe 12 is then installed in place of the drainage pipe 6, upstream of the junction with the sewer pipe 4, as appropriate.

[0016] The water storage and drainage device 30 according to this embodiment is installed inside the shaft 13. The inside of the shaft 13 is partitioned from the water storage and drainage device 30 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. In other words, space 14 is upstream and space 15 is downstream. 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 now be described in detail. The water storage and drainage device 30 comprises a pair of fixed frames 31 arranged opposite each other, a first partition plate 33 attached to the pair of fixed frames 31 and having a water passage port 32 below through which water passes, a second partition plate 37 having an orifice 36 at its lower portion, and a mesh 34 attached to the second partition plate 37 so as to cover the orifice 36. The second partition plate 37 moves up and down along a guide frame 35 provided on the pair of fixed frames 31.

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

[0019] The pair of fixed frames 31 are integrally formed on the bottom and side surfaces of the shaft 13. As shown in Figures 3 and 4, the pair of fixed frames 31 are arranged facing each other with their respective side surfaces facing each other. The fixed frames 31 are made of, for example, concrete. A vertical groove 47 is provided on each side surface of the opposing fixed frames 31, into which a first partition plate 33 (described later) is fitted. This vertical groove 47 has, for example, a concave shape when viewed from above the fixed frames 31. The vertical groove 47 does not extend to the bottom of the fixed frames 31. The vertical groove 47 may also extend to the bottom of the fixed frames 31. There is a space between the upper ends of the pair of fixed frames 31 and the upper surface of the shaft 13. In other words, the height of the pair of fixed frames 31 is lower than the height of 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 groove 47 on each side surface 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 upstream. The first partition plate 33 has a water passage 32 below through which water (rainwater 17) passes. Multiple first partition plates 33 may be fitted into the vertical grooves 47 of the pair of fixing 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 fixing frames 31. The first partition plate 33 has a rectangular parallelepiped or flat plate shape and is made of, for example, fiber-reinforced resin. The first partition plate 33 and the pair of fixing frames 31 may be integrated.

[0021] Since the vertical groove 47 is not provided all the way 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 side of the first partition plate 33 through this water passage opening 32 to the downstream side. 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 discharge amount setting. By providing the water passage opening 32 at such a height, the second partition plate 37 described below can be raised to 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 fixing frames 31. A more preferable upper limit for the height of the water passage opening 32 is 20 cm, because discharging too much rainwater 17 in one go may exceed the storage capacity of the downstream space 15. When the vertical grooves 47 are provided all the way to the bottom of the fixed frame 31 and the first partition plate 33 is fitted all the way to the bottom of the fixed frame 31, a through hole may be formed in the bottom 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 all the way to the bottom of the fixed frame 31 described above.

[0022] The water storage and drainage device 30 includes a second partition plate 37. The second partition plate 37 is disposed upstream of the first partition plate 33. The second partition plate 37 is, for example, flat and made of fiber-reinforced resin. The lower end of the second partition plate 37 is in contact with the bottom surface inside the shaft 13. The second partition plate 37 is installed in a position that blocks the water passage port 32 from rainwater 17 flowing from upstream. In other words, the upper end (height) of the second partition plate 37 is higher than the upper end of the water passage port 32. The second partition plate 37 is installed so as to partially overlap the first partition plate 33 in the height direction. The upper end (height) of the second partition plate 37 is preferably lower than the upper end (height) of the first partition plate 33. The height of the second partition plate 37 is set taking into consideration the storage capacity of the space 14. The lateral length (width) of the second partition plate 37 is a length that allows it to be attached to a pair of guide frames 35, which will be described later. The height and width of the second partition plate 37 are the height and width, respectively, when the second partition plate 37 is viewed from above.

[0023] As shown in Figures 5 and 6, the second 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. Figure 5 is a schematic perspective view for explaining the movement of the second partition plate 37, showing the state before the second partition plate 37 moves up and down (the state in which the second partition plate 37 is in contact with the ground), and Figure 6 shows the state after the second partition plate 37 moves up and down. The guide frame 35 is provided on the upstream side of the pair of fixed frames 31.

[0024] The second partition plate 37 is connected to a partition plate elevator 40, and can be raised and lowered by operating the partition plate elevator 40. The partition plate elevator 40 has, for example, a lifting handle 41 on the top and a support rod 42 that supports the lifting handle 41. The lifting handle 41 is set at a height that allows work to be done without getting wet even when the shaft 13 is full of water. To more easily operate the partition plate elevator 40, it is preferable that the lifting handle 41 protrude above ground. The support rod 42 is rotatably fixed to the bottom of the shaft 13. The surface of the support rod 42 has, for example, a threaded portion 42A. The second partition plate 37 has a threaded portion 37A that can be threadedly engaged with the threaded portion 42A of the support rod 42.

[0025] With the threaded portion 42A of the support rod 42 and the threaded portion 37A of the second partition plate 37 threadedly engaged, the second partition plate 37 can be raised and lowered by operating (rotating) the lifting handle 41 of the partition plate elevator 40. When performing maintenance on the storage pipe, the second partition plate 37 can be raised, allowing rainwater 17 and impurities such as garbage to 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 shaft 13 where the water level has dropped. In this embodiment, two partition plate elevators 40 are installed so as to connect to both ends of the second partition plate 37 in the width direction, as shown in Figures 5 and 6, but the number of partition plate elevators 40 installed on the second partition plate 37 is not limited to two.

[0026] An orifice 36 is provided below the second partition plate 37. The orifice 36 penetrates the second partition plate 37. The orifice 36 faces the water passage port 32 below the first partition plate 33. The orifice 36 is provided at a height corresponding to the water passage port 32 below the first partition plate 33. The orifice 36 is, for example, circular. The shape of the orifice 36 is not limited to a circular shape and may be, for example, an elliptical or rectangular shape.

[0027] As shown in FIG. 3, a mesh 34 is attached to the orifice 36 on the upstream side of the second partition plate 37 so as to cover the orifice 36. The mesh 34 is larger than the opening of the orifice 36. The mesh 34 prevents clogging due to impurities such as garbage mixed in with the rainwater 17. The mesh 34 is, for example, flat or basket-shaped. The mesh size of the mesh 34 is sufficiently smaller than the opening of the orifice 36. The mesh 34 is made of, for example, metal.

[0028] According to this embodiment, the net 34 is attached so as to cover the orifice 36, so that the net 34 can catch impurities flowing from the upstream side, preventing clogging. Furthermore, by raising the second partition plate 37, the rainwater 17 and impurities can be discharged downstream all at once, and after the discharge, cleaning of the net 34 and other operations can be easily performed. After cleaning of the net 34 and other operations, the second partition plate 37 can be lowered to return it to its original state. In this way, the water storage and drainage device 30 according to this embodiment can be easily and efficiently maintained.

[0029] Furthermore, the second partition plate 37 may be disposed upstream of the first partition plate 33 at a distance from the first partition plate 33. The distance between the first partition plate 33 and the second partition plate 37 is, for example, 10 cm to 100 cm. If the first partition plate 33 and the second partition plate 37 are in contact with each other (the distance between the first partition plate 33 and the second partition plate 37 is 0), scratches will occur on the contact surfaces of the first partition plate 33 and the second partition plate 37 when the second partition plate 37 moves up and down. Therefore, it is preferable that the distance between the first partition plate 33 and the second partition plate 37 be 20 cm or more. If the distance between the first partition plate 33 and the second partition plate 37 is too wide, the installation area of ​​the water storage and drainage device 30 will increase. Therefore, it is preferable that the distance between the first partition plate 33 and the second partition plate 37 be 60 cm or less. In this way, the second 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 surfaces of the first partition plate 33 and the second partition plate 37 when the second partition plate 37 moves up and down.

[0030] 7, a sealing member 45 may be disposed between the upper end of the first partition plate 33 and the upper end of the second partition plate 37. The sealing member 45 is disposed at a position where the second partition plate 37 and the first partition plate 33 partially overlap in the height direction. When the amount of rainwater 17 stored in the shaft 13 increases, this sealing member 45 closes the gap between the upper end of the first partition plate 33 and the upper end of the second partition plate 37 to prevent the rainwater 17 from exceeding the upper end of the second partition plate 37 and infiltrating into the first partition plate 33 side. The sealing member 45 is attached, for example, to the upper end of the second partition plate 37 (at a position where the second partition plate 37 and the first partition plate 33 partially overlap in the height direction). The sealing member 45 may be integral with the second partition plate 37. The sealing member 45 may be attached to the upper end of the first partition plate 33, but it is preferable to attach the sealing member 45 to the second partition plate 37 because, if the sealing member 45 is attached to the second partition plate 37, the sealing member 45 can be cleaned when the second partition plate 37 is raised.

[0031] The sealing member 45 is shaped to be able to close the gap between the upper end of the first partition plate 33 and the upper end of the second partition plate 37 so that rainwater 17 does not infiltrate over the upper end of the second partition plate 37 into the first partition plate 33 side. For example, the width of the sealing member 45 is approximately equal to the distance between the first partition plate 33 and the second partition plate 37. The length of the sealing member 45 (the length in the width direction of the second partition plate 37) is approximately equal to the length between the pair of fixing frames 31 or the pair of guide frames 35. The thickness (vertical length) of the sealing member 45 is set to a thickness that is strong enough to withstand the weight of rainwater 17 that infiltrates over the upper end of the second partition plate 37.

[0032] The sealing member 45 is, for example, a flat plate member or an elastic member made of rubber, etc. Fig. 7 is a schematic perspective view showing an example in which the sealing member 45 is attached to the upper end of the second partition plate 37, Fig. 7(a) shows the case in which a flat plate sealing member 45a is attached as the sealing member 45, and Fig. 7(b) shows the case in which an elastic sealing member 45b is attached as the sealing member 45.

[0033] The flat sealing plate 45a is made of a synthetic resin such as urethane. A solid plate may be used, but foam is preferred. The thickness of the flat sealing plate 45a is, for example, 2 cm to 5 cm.

[0034] The elastic seal member 45b is made of an elastic material such as rubber (synthetic or natural), for example, EPDM. The shape of the elastic seal member 45b may be the same as that of the flat seal member 45a. However, because the elastic seal member 45b is elastic, the thickness (vertical length) of the elastic seal member 45b may be thicker than that of the flat seal member 45a. The thickness of the elastic seal member 45b is, for example, 2 cm to 10 cm.

[0035] A seal member 45 is disposed between the upper end of the first partition plate 33 and the upper end of the second partition plate 37, which prevents rainwater 17 from going over the upper end of the second partition plate 37 and entering the first partition plate 33. This makes it easy to perform tasks such as cleaning the area between the first partition plate 33 and the second partition plate 37.

[0036] A workbench 50 may be installed above the pair of fixed frames 31. FIG. 8 is a schematic diagram showing an example of a case in which the workbench 50 is installed above the pair of fixed frames 31. The workbench 50 has a fence 51 and a scaffolding 52. From the viewpoint of workability, it is preferable to install the workbench 50 on the ground. Also, as shown in FIG. 8, by projecting the lifting handle 41 of the partition board elevator 40 from the scaffolding 52, the second partition board 37 can be raised and lowered on the workbench 50. This makes maintenance easy and efficient.

[0037] Although the embodiments of the present invention have been described above, the above embodiments are presented as examples, and the scope of the present invention is not limited to the above embodiments. The above embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. The above embodiments and their variations are included in the scope of the invention and its equivalents as defined in the claims, as well as in the scope and spirit of the invention. Furthermore, when terms such as "almost," "equivalent," and "degree" are used, they are used to mean those that are within the level or precision that is commonly accepted. [Explanation of symbols]

[0038] 30 Water storage and drainage device 31 Fixed Frame 32 Water outlet 33 First partition 34 Net 35 Guide frame 36 Orifice 37 Second partition 40 Partition board lift 45 Sealing material 50 Workbench

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 having an orifice provided at a lower portion thereof; a screen attached to the upstream side of the second partition plate so as to cover an opening of the orifice; Equipped with The second partition plate is disposed on the upstream side of the first partition plate and moves up and down along a guide frame provided on the pair of fixed frames, The first partition plate is disposed in parallel to the second partition plate near the downstream side of the second partition plate, A vertical groove is provided in the pair of fixing frames, and the first partition plate is fitted into the vertical groove. A rainwater storage and drainage system installed underground.

2. The rainwater storage and drainage device according to claim 1, wherein the second partition plate is disposed upstream of the first partition plate at a distance from the first partition plate.

3. A rainwater storage and drainage device installed underground as described in claim 1 or claim 2, characterized in that it is provided with a sealing member arranged on the upper end of the second partition plate.

4. The rainwater storage and drainage device installed underground according to any one of claims 1 to 3, further comprising a work platform installed above the pair of fixed frames.

5. A rainwater storage and drainage device installed underground as described in any one of claims 1 to 4, characterized in that the guide frame is provided upstream of the pair of fixed frames, and the second partition plate rises and falls in the gap between the guide frame and the pair of fixed frames.

6. A partition board lift having a lifting handle on the upper part, The second partition plate is connected to the partition plate elevator and is raised and lowered by operating the lifting handle of the partition plate elevator. The rainwater storage and drainage device according to any one of claims 1 to 5, which is provided underground.

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