JP6013893B2 - Rainwater storage piping structure - Google Patents

Description

  The present invention relates to a rainwater storage piping structure in which rainwater is stored inside a rainwater drainage pipe embedded in a residential land so that the stored rainwater can be used effectively.

  In recent years, awareness of effective use of resources and energy conservation has increased. In recent years, rainwater has been stored inside rainwater drainage pipes embedded in residential land, and attempts have been made to effectively use the stored rainwater for watering plants and washing cars. Has been made.

  In view of such circumstances, the present applicant, in the rainwater drainage pipe structure in which the rainwater tank and the rainwater tank are connected by a drain pipe, the rainwater tank inlet located on the downstream side or the rainwater tank positioned on the downstream side. A rainwater drainage pipe structure was proposed in which a weir for temporarily storing rainwater flowing into the pipe was provided at the end of the drainage pipe connected to the inlet (Patent Document 1).

  The rainwater drainage piping structure of the above-mentioned patent document 1 is such that rainwater is collected by a dam provided at the end of a drainage pipe connected to the inlet of a rainwater tank located on the downstream side or the inlet of the rainwater tank located on the downstream side. Since rainwater is stored upstream of the weir, it can be easily taken from the intake of a rainwater basin, etc. to meet the needs of the era when it can be used effectively for watering the garden. Met.

JP 2010-127020 A

  However, in the rainwater drainage pipe structure of Patent Document 1, the rainwater stored inside the pipe includes rain that has begun to fall, that is, so-called initial rainwater. Since it is expensive, there is a problem that the use of the stored rainwater is limited.

  The present invention has been made in view of the above problems, and the problem to be solved is a rainwater storage piping structure that can efficiently store only clean rainwater from which initial rainwater has been removed, inside the rainwater drainage piping. It is to provide.

In order to achieve the above object, a rainwater storage piping structure according to the present invention includes a rainwater inflow portion for allowing rainwater to flow into the rainwater drainage piping, a temporary storage portion for temporarily storing the inflowing rainwater, and a constant amount of the temporary storage portion. A storm water reservoir having an overflow section where storm water exceeding the volume overflows, a storage pipeline for storing rain water overflowed from the overflow section, and a damming section for damming the rain water provided inside the storage pipeline It is a piping structure, and the storage pipeline is substantially horizontal, or a downward slope is provided from the most upstream side to the downstream side, and the bottom of the tube on the most upstream side is at a position lower than the overflow part, The upper part of the damming part is opened, and the upper end of the damming part is located higher than the top of the storage pipeline, and the temporary storage part is provided with a drainage part that gradually drains rainwater. The amount of rainwater flowing into the temporary storage section is drained from the drainage section. Beyond the that rainwater amount, in which the water level of the temporary storage part increases, rainwater overflows beyond the overflow portion is characterized in that flows into the reservoir conduit.

  In the rainwater storage piping structure of the present invention, the temporary storage section and the storage pipeline are connected via an outflow pipe, and the bottom of the outflow pipe is used as an overflow section, or the temporary storage section is provided inside the temporary storage section. It is preferable that a partition wall having a predetermined height for partitioning the inside of the section into an upstream side and a downstream side is provided and the upper end of the partition wall is an overflow section. Further, it is preferable that the height of the pipe top on the uppermost stream side of the storage pipeline is substantially the same as or lower than the height of the overflow section, and the foreign matter collection is performed upstream of the drainage section provided in the temporary storage section. In particular, the rainwater inflow part is a rainwater inflow pipe connected to the temporary storage part, and a foreign matter collecting means is provided at the end of the rainwater inflow pipe on the temporary storage part side. Preferably it is. Furthermore, it is preferable that the drainage part provided in the temporary storage part is an orifice formed in the bottom face of the temporary storage part or / and the lower end part of the side surface, or an opening covered with a water-permeable sheet.

In the rainwater storage piping structure of the present invention, the storage pipeline for storing rainwater overflowed from the overflow section is substantially horizontal, or a downward slope is provided from the most upstream side to the downstream side. Since the tube bottom is located at a position lower than the overflow section where the rainwater that exceeds a certain amount of the temporary storage section overflows, the rainwater that exceeds a certain amount of the temporary storage section is reliably and efficiently put inside the storage pipe. Can be stored. In addition, since the initial rainwater is drained from the drainage section provided in the temporary storage section, the initial rainwater does not flow into the storage pipeline beyond the overflow section, and only clean rainwater that excludes the initial rainwater is used. Can be stored. On the other hand, when the rain stops, the rainwater temporarily stored in the temporary storage section is completely drained from the drainage section, so that only the clean rainwater that excludes the initial rainwater flows into the storage pipe for the next rainfall letter. However, it is blocked by the blocking unit and stored. Moreover, since the upper part of the weir is opened and the upper end of the weir is higher than the top of the storage pipe, it is possible to store a large amount of rainwater until the storage pipe is full. Even if rainwater flows in, the drainage pipe overflows and drains over the upper end of the damming portion, so that the storage pipeline is not punctured by rainwater. As described above, the present invention can efficiently store only clean rainwater from which initial rainwater has been removed, inside the rainwater drainage pipe, and the stored rainwater can be used for various purposes such as watering plants and washing cars. It can be effectively used for applications.

  Next, the rainwater storage piping structure in which the temporary storage section and the storage pipe line are connected via an outflow pipe, and the bottom of the outflow pipe is the overflow section, the temporary storage section and the storage pipe line are connected to the outflow pipe. By connecting them, the rainwater that has flowed into the storage pipe does not flow back to the temporary storage section even if there is no downward slope in the storage pipe, and the flexibility of the piping layout of the storage pipe is drastically increased. improves.

  On the other hand, a rainwater storage piping structure having a partition wall having a predetermined height for partitioning the interior of the temporary storage part on the upstream side and the downstream side and having the upper end of the partition wall as an overflow section is provided inside the temporary storage part. By providing the wall, even when the storage pipe is directly connected to the temporary storage section, there is no need to provide a downward slope in the storage pipe, and there is an advantage that the pipe design and construction are easy.

  Moreover, the rainwater storage piping structure in which the height of the top of the uppermost stream side of the storage pipeline is substantially the same as or lower than the height of the overflow section can effectively utilize the entire storage pipeline as a storage space.

  Furthermore, in the rainwater storage piping structure in which foreign matter collecting means is provided upstream of the drainage portion provided in the temporary storage portion, foreign matters are collected by taking the foreign matter collecting means. It is possible to prevent the problem that the initial rainwater is not drained from the temporary storage part because the part is clogged with foreign matter.

  In particular, the rainwater inflow pipe is a rainwater inflow pipe connected to the temporary storage section, and the rainwater storage pipe structure in which foreign matter collecting means is provided at the end of the rainwater inflow pipe on the temporary storage section side is the most. Foreign matter can be collected efficiently with simple construction.

  And the rainwater storage piping structure in which the drainage part provided in the temporary storage part is the orifice formed in the bottom face of the temporary storage part or / and the lower end part of the side is used for the rainwater temporarily stored in the temporary storage part. It can be drained gradually. In addition, the rainwater storage piping structure in which the drainage part is an opening covered with a water-permeable sheet makes it possible to increase the area of the drainage part, and the entire drainage part is clogged and temporarily stored in the temporary storage part. Since the rainwater stored in is almost never drained from the drainage part, the frequency of maintenance can be reduced.

It is a schematic explanatory drawing which shows the rainwater storage piping structure which concerns on one Embodiment of this invention. It is sectional drawing which shows the temporary storage part of the same piping structure. It is sectional drawing which shows the drainage basin and damming part of the same piping structure. In the same piping structure, it is explanatory drawing which shows the case where a storage pipe line is connected directly to a temporary storage part. It is a schematic explanatory drawing which shows the rainwater storage piping structure which concerns on other embodiment of this invention. It is sectional drawing which shows the temporary storage part of the same piping structure.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  The rainwater storage piping structure of the present invention shown in FIG. 1 has been developed so that rainwater can be stored inside a rainwater drainage pipe embedded in a residential land, and the stored rainwater can be used effectively for watering plants or washing cars. The rainwater inflow part 1 for flowing rainwater into the rainwater drainage pipe, the temporary storage part 2 for temporarily storing the inflowing rainwater, and the overflow of the rainwater exceeding a certain amount of the temporary storage part 2 It has the flow part 3a, the storage pipe line 4 which stores the rainwater which overflowed from the overflow part 3a, and the damming part 5 which dams the rainwater provided in the inside of the storage pipe line 4.

As shown in FIGS. 1 and 2, the rainwater inflow portion 1 is a rainwater inflow pipe for allowing rainwater that has rained onto the roof of a house or the like to flow into the temporary storage portion 2, and its upstream end portion is The downstream end is connected to the upper part of the side surface of the temporary reservoir 2. Accordingly, rainwater that has rained on the roof of a house flows down a ridge (not shown), and flows into the temporary storage part 2 from the rainwater inflow part 1.
The rainwater inflow portion 1 is not limited to the inflow pipe 1 as long as rainwater flows into the temporary storage portion 2. For example, an opening is provided in the upper portion of the temporary storage portion 2, The opening may be a rainwater inflow portion.

Further, as shown in FIG. 2, a foreign matter collecting means 6 is provided at the downstream end of the rainwater inflow portion 1. This foreign matter collecting means 6 is for preventing foreign matter from entering and clogging the drainage part 2f described later, and a hemispherical mesh member or bag-like net member is suitably used as the foreign matter collecting means 6. It is done.
The foreign matter collecting means 6 is for preventing foreign matter from entering the drainage portion 2f, and may be provided anywhere upstream from the drainage portion 2f. It is attached to the downstream end of the rainwater inflow portion 1 which is easy to work, has a large effect and is easy to maintain. Further, as will be described later, since the water passage hole 20b is formed in the lid 2b of the temporary storage section 2, the inside of the temporary storage section 2 is formed in order to prevent foreign matter from entering through the water passage hole 20b. A foreign matter collecting means 6 such as a hemispherical mesh member or a bag-like net member is provided so as to be divided into upper and lower parts, or a foreign matter collecting means 6 is provided directly on the water passage hole 20b so as to close the water passage hole 20b. It is also preferable.

  The temporary storage part 2 for temporarily storing rainwater flowing in from the rainwater inflow part 1 is a synthetic resin rainwater tank made of polypropylene, vinyl chloride resin or the like having excellent durability and workability. As shown, the upper end is open and the lower end is a closed bucket. At the upper end of the temporary storage portion 2, a lid receiving portion 2a having a substantially concave cross section is provided so as to project outward, and a lid 2b is placed on the lid receiving portion 2a. The lid body 2b has a plurality of water passage holes 20b so that rainwater that has fallen into the residential land flows into the temporary storage portion 2. The water passage holes 20b are also connected to the rainwater inflow portion 1 described above. Similarly, it plays a role as a rainwater inflow portion for allowing rainwater to flow into the temporary storage portion 2.

Further, as shown in FIG. 2, a connection port 2 c for inserting the downstream end of the rainwater inflow portion 1 and a connection for inserting the upstream end of the outflow pipe 3 are inserted into the peripheral surface of the temporary storage portion 2. A mouth 2d is provided. The connection port 2c for inserting the downstream end portion of the rainwater inflow portion 1 is provided at a position higher than the connection port 2d for inserting the upstream end portion of the overflow portion 3a, and rainwater is connected to the connection ports 2c and 2d. When the inflow part 1 and the overflow part 3a are respectively inserted, the rainwater inflow part 1 is at a position higher than the overflow part 3a (position where the bottom of the rainwater inflow pipe is higher than the top of the outflow pipe 3). Therefore, the rainwater that has flowed into the temporary storage portion 2 from the rainwater inflow portion 1 does not flow back to the rainwater inflow portion 1 again.
The connection ports 2c and 2d may be provided integrally with the temporary storage unit 2 as a receiving port or an insertion port for the pipe. However, the connection ports 2c and 2d of the temporary storage unit 2 of the present embodiment are provided as a hole saw. For example, an annular seal packing 2e is provided around the connection ports 2c and 2d so as to improve the water-stopping property. By providing the connection ports 2c and 2d by drilling holes in this manner, the connection ports 2c and 2d can be provided at arbitrary locations, and the degree of freedom of piping is improved.

  Further, as shown in FIG. 2, a drainage part 2 f is provided on the bottom surface of the temporary storage part 2. The drainage part 2f is an orifice (small-diameter hole) for gradually draining rainwater flowing into the temporary storage part 2 and penetrating it into the ground, or flowing it to another rainwater drainage pipe or a gutter, By providing this drainage part 2f, only clean rainwater from which initial rainwater has been completely removed can be stored in the storage pipeline 4 to be described later.

More specifically, when raining, as described above, rainwater flows into the temporary reservoir 2 from the rainwater inlet 1 or the water passage 20b of the lid 2b. At this time, since the rain at the beginning of raining, so-called initial rainwater, contains a large amount of pollutant components and has high acidity, even if the initial rainwater is stored in the storage pipeline 4, the use is limited. In view of this, only clean rainwater from which initial rainwater has been removed is stored in the storage pipeline 4, and the drainage section 2f is provided on the bottom surface of the temporary storage section 2 so that the stored rainwater can be used for various purposes. As described above, since the drainage portion 2f is an orifice (small-diameter hole), the rainwater that has flowed into the temporary storage portion 2 is not drained immediately from the drainage portion 2f, but is gradually drained. Only when the amount of rainwater flowing into the temporary reservoir 2 exceeds the amount of rainwater drained from the drain 2f, the water level of the temporary reservoir 2 begins to rise. The water level of the temporary reservoir 2 starts to rise after the initial rainwater is substantially drained, since the diameter and number of orifices as the drainage portion 2f and the capacity of the temporary reservoir 2 are set. The water level does not rise only by this, and the rainwater on the top layer when the water level rises is clean rainwater that contains almost no pollutant and has low acidity, and only this clean rainwater is stored beyond the overflow section 3a. It flows into the pipeline 4.
The drainage part 2f is not limited to the orifice as in the present embodiment as long as it can gradually drain the rainwater that has flowed in. For example, an opening is provided on the bottom surface of the temporary storage part 2, and the opening It is good also as the drainage part 2f by covering with a water-permeable sheet | seat (not shown). Moreover, since it is necessary to provide the drainage part 2f at least upstream from the overflow part 3a, in this embodiment, it is between the rainwater inflow part 1 and the overflow part 3a, and more than the overflow part 3a. Is also provided at a lower position.

  On the other hand, when the rain stops, the rainwater temporarily stored in the temporary storage unit 2 is completely drained from the drainage unit 2f, and no rainwater remains in the temporary storage unit 2 at the next rainfall, and the process described above. Similarly, only clean rainwater from which initial rainwater has been removed is stored inside the storage pipe 4.

  As shown in FIG. 1, the temporary storage section 2 and the storage pipeline 4 are connected via an outflow pipe 3 which is a cylindrical short pipe, and the bottom of the outflow pipe 3 is connected to the temporary storage section. It becomes the overflow part 3a where the rainwater exceeding a certain amount of 2 overflows. The height L1 of the overflow section 3a needs to be higher than the pipe bottom on the uppermost stream side of the storage pipeline 4 to prevent backflow. In this embodiment, the height L1 is more smoothly than the temporary storage section 2 The overflow section height L1 is slightly higher than the topmost pipe height L2 of the storage pipeline so that overflowing rainwater flows into the storage pipeline 4 and does not flow backward.

  In order to make the height L1 of the overflow section 3a and the height L2 of the pipe top on the uppermost stream side of the storage pipe line as described above, the inside of the pipe can be inspected. The storage pipeline 4 is connected via an inspection port 7. The inspection port 7 is a cylindrical body that is open at the upper end and closed at the lower end, and has a circumferential surface with a height L1 of the overflow portion 3a and a height L2 of the uppermost stream side of the storage pipeline. Is connected to the outlet of the outflow pipe 3 and the connection of the storage pipe 4 with a hole saw or the like. Then, by removing a lid (not shown) placed in the upper end opening, maintenance such as inspection and cleaning of the inside of the pipe can be performed.

  It should be noted that clean rainwater from which initial rainwater has been removed can be stored in the storage line 4 without connecting the temporary storage unit 2 and the storage line 4 via the outflow pipe 3 as in this embodiment. However, if the storage conduit 4 is directly connected to the connection port 2d of the temporary storage section 2, the stored rainwater will enter the temporary storage section 2 unless a corresponding downward slope is provided in the storage conduit 4, as shown in FIG. Since it will flow backward, storage efficiency will become very bad. Therefore, as in the present embodiment, it is preferable that the temporary storage section 2 and the storage pipeline 4 are connected via the outflow pipe 3.

As shown in FIG. 1, a storage pipe 4 for storing rainwater overflowed from the overflow section 3a is, as shown in FIG. 1, a drain pipe 4 for draining rainwater buried and flowing into a public sewer system. In this embodiment, the half of the drainage basin 8 (upstream part of the weir part 5) and the water intake 10 are used, but here, the drainage pipe occupying most of the storage amount is treated as the storage pipe line 4. This storage pipe 4 is branched in the middle to further increase the amount of rainwater stored. One is connected to a downstream drain pipe 11 connected to a public sewerage facility (not shown), and the other takes rainwater. Connected to the water intake 10. The storage pipeline 4 that branches and faces the intake port 10 is provided with a slight flow gradient toward the intake port 10 so that the stored rainwater collects at the intake port 10. Therefore, even if the inside of the storage pipe 4 is not filled with rain water, the rain water that has flowed in from the overflow section 3a is collected at the water intake 10 and can be easily taken.
In the drawing, the water intake 10 where the storage pipe 4 is branched is drawn on the lower side, but the actual height GL of the ground surface is the same.
In addition, the storage pipeline 4 may be configured by a pipe (φ150 to φ300) having a diameter larger than that of a normal rainwater drain pipe in order to increase the storage amount.

  As shown in FIG. 1, the downstream end of the storage pipe 4 on the unbranched side is connected to a drainage basin 8. As shown in FIG. 3, the drainage basin 8 has a cylindrical inflow port 8a and an outflow port 8b integrally provided at both left and right ends, and a cylindrical body 8c having a circular opening at the upper end. As shown above, the downstream end of the storage pipe 4 is connected to the inlet 8a, and the downstream drain pipe 11 is connected to the outlet 8b. ing. Further, a height adjusting cylinder 9 is fitted into the cylinder body 8c and adjusted so that the upper end thereof faces the ground surface.

  As shown in FIG. 3, the drainage basin 8 is provided with a recessed portion 8 d for inserting the damming portion 5. The recessed portion 8d is formed with a concave groove perpendicular to the traveling direction of the rainwater, and is provided continuously from the bottom surface of the drainage basin 8 to the upper side surface.

The damming portion 5 fitted into the recessed portion 8d of the drainage basin 8 is a plate body whose lower end is formed in a semicircular shape in accordance with the shape of the bottom surface of the drainage basin 8, Once fitted to join the club 8d, positioned near higher than the inlet 8a (Kan'itadaki the reservoir conduit 4 in other words) of the upper end of the dam portion 5 is catch basin 8 is, above the dam portion 5 open Has been. Between the weir part 5 and the recessed part 8d, a water stop packing (not shown) for improving the water tightness is interposed. It does not flow out into the tube 11. By providing this damming portion 5, the inflow port 8a and the outflow port 8b of the drainage basin 8 are separated from each other, and the rainwater flowing into the drainage basin 8 from the inflow port 8a immediately flows out from the outflow port 8b. Without being blocked by the damming portion 5 , a large amount of rainwater is stored in the storage pipe 4 located upstream from the damming portion 5 until the rainwater reaches the upper end of the damming portion 5. ing. Of course, even if rainwater further flows into the storage pipeline 4 in a state where the storage pipeline 4 is full of water, the rainwater passes over the upper end of the damming portion 5 and is drained to the downstream drainage pipe 11. The storage line 4 is not punctured by rainwater. The damming portion 5 that fulfills such a role is provided on the most downstream side of the rainwater drainage pipe buried in the residential land, and the temporary storage portion 2 is provided on the most upstream side, thereby falling on the roof of the house or the residential land. The largest amount of rainwater can be stored.

On the other hand, as shown in FIG. 1, the downstream end on the branched side of the storage pipeline 4 is connected to a water intake 10 to make a dead end. The intake port 10 is a cylindrical body having an upper end opened and a lower end closed, similar to the inspection port 7 described above, and a connection port for connecting the storage conduit 4 is provided on the peripheral surface thereof, such as a hole saw. And is disposed at the lowest position of the storage conduit 4. The water intake 10 is provided with a water intake pump 10a so that rainwater collected in the water intake 10 can be easily taken and used for various purposes such as watering plants and washing cars. I have to.
In addition, by providing a water level gauge such as a float in the intake port 10, it becomes possible to know the storage amount inside the storage pipe 4. In addition, the intake port 10 does not have to be provided at the downstream end of the storage pipe 4 on the branched side, and is provided, for example, in the middle of the storage pipe 4 on the non-branched side (upstream from the drainage basin 8). Also good. Even in this case, rainwater collects at the intake port 10 even when the storage amount in the storage pipe 4 is reduced by providing a slight flow gradient from both the upstream side and the downstream side toward the intake port 10. Thus, water can be easily taken.

  In the rainwater storage piping structure of the present invention configured as described above, the initial rainwater is drained from the drainage part 2 f provided in the temporary storage part 2, so that the initial rainwater passes through the overflow part 3 a and enters the storage pipe 4. However, only clean rainwater that excludes initial rainwater that contains many pollutant components and high acidity can be stored in the storage pipe 4. On the other hand, when the rain stops, the rainwater temporarily stored in the temporary storage section 2 is completely drained from the drainage section 2f. Therefore, only the clean rainwater from which the initial rainwater is removed is stored in the storage pipe 4 during the next rainfall. The stored rainwater can be effectively used regardless of the application, such as watering a plant or washing a car.

  FIG. 5 is a schematic explanatory view showing a rainwater storage piping structure according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view showing a temporary storage part of the piping structure.

  The rainwater storage piping structure of this embodiment uses a temporary storage section 20 shown in FIG. 6, and by using this temporary storage section 20, unlike the rainwater storage piping structure of the embodiment described above, the temporary storage section. Even if 20 and the storage pipe line 4 are directly connected without going through the outflow pipe 3, an equivalent storage amount can be secured.

  This temporary storage part 20 is a rain water tank made of a synthetic resin formed of polypropylene, vinyl chloride resin or the like having excellent durability and workability, as with the temporary storage part 2 described above, as shown in FIG. The upper end is open and the lower end is a closed bucket. Further, a lid receiving portion 2a having a substantially concave cross-sectional shape is provided on the upper end of the temporary storage portion 20 so as to protrude outward, and a lid body 2b is placed thereon. 1 is provided with a connection port 2c for inserting the downstream end portion 1 and a connection port 2g for inserting the upstream end portion of the storage pipe 4. The connection port 2c for inserting the downstream end portion of the rainwater inflow portion 1 is also provided at a position higher than the connection port 2g for inserting the upstream end portion of the storage conduit 4 in the same manner as the temporary storage portion 2 described above. When the rainwater inflow part 1 and the storage pipe 4 are respectively inserted into the connection ports 2c and 2g, the rainwater inflow part 1 is higher than the storage pipe 4 (the bottom of the rainwater inflow pipe is the top of the storage pipe 4). The rainwater flowing into the temporary storage part 2 from the rainwater inflow part 1 is prevented from flowing back into the rainwater inflow part 1 again.

  Further, similarly to the above-described temporary reservoir 2, a drainage portion 2 f for draining initial rainwater is provided on the bottom surface of the temporary reservoir 20, so that rainwater having a high amount of pollutant and high acidity is stored in the reservoir pipe. Inflow to the path 4 is prevented. However, unlike the drainage part 2f of the temporary storage part 2 described above, this drainage part 2f is provided only on either side, assuming that the bottom surface of the temporary storage part 20 is divided into left and right, In the present embodiment, the temporary storage unit 20 is provided only on the left side of the bottom surface, and the drainage unit 2f is not provided on the right side. This is because the partition wall 30 described below is provided inside the temporary storage section 20.

As shown in FIG. 6, the partition wall 30 provided inside the temporary storage section 20 is a wall body that partitions the temporary storage section 20 into an upstream side (left side) and a downstream side (right side). The upper end of 30 is an overflow section 30a where rainwater overflows. By providing the partition wall 30, rainwater flowing in from the rainwater inflow portion 1 flows into the space upstream of the partition wall 30 and is temporarily stored, and the water level rises when the inflow amount exceeds the drainage amount from the drainage portion 2 f. In addition, the gas flows into the space on the downstream side of the partition wall 30 over the overflow portion 30a which is the upper end of the partition wall 30. Accordingly, the partition wall 30 is located at a position where the rainwater flowing in from the rainwater inflow portion 1 does not directly flow into the space downstream of the partition wall 30 (the space on the upstream side of the partition wall 30 where rainwater flowing in from the rainwater inflow portion 1 flows). The temporary storage part 20 must be partitioned upstream and downstream at the bottom surface, the inner peripheral surface, and the upstream wall surface of the partition wall 30), and the initial rainwater passes downstream of the overflow part 30a. A predetermined height that does not flow into the side space is required. The predetermined height is set in consideration of the amount of rainfall, the amount of drainage from the drainage unit 2f, the capacity of the temporary storage unit 20, and the partition wall 30 of the present embodiment is the top of the storage pipe 4 Is set to approximately the same height. When the partition wall 30 is set to this height, the rainwater that has passed the overflow portion 30a is only clean rainwater from which the initial rainwater has been eliminated, and the drainage portion 2f is provided on the right side of the bottom surface of the temporary storage portion 20 as described above. There is no need. The partition wall 30 is preferably formed integrally with the temporary reservoir 20, but a separate partition wall may be attached to the temporary reservoir 20 in a watertight manner.
To be precise, the upstream side of the partition wall 30 of the temporary storage unit 20 (rainwater trough) is a temporary storage unit for temporarily storing rainwater, and the downstream side of the partition wall 30 is a storage pipe for storing rainwater. Here, for the sake of convenience, the entire rainwater basin is referred to as a temporary reservoir 20.
Further, in the temporary storage unit 20 of the present embodiment, there is a risk that the initial rainwater flows downstream from the partition wall 30 and is stored in the storage pipeline 4. It is preferable to place the lid 2b that is not perforated.
Since the other structure of this embodiment is the same as that of embodiment mentioned above, the same code | symbol is attached | subjected to the same member and description is abbreviate | omitted.

  The rainwater storage piping structure of the present invention having the above-described configuration is a temporary storage section partitioned by the partition wall 30 on the upstream side and the downstream side in addition to the operational effects of the rainwater storage piping structure shown in FIGS. By using 20, even if the temporary storage section 20 and the storage pipeline 4 are directly connected, an equivalent storage amount can be secured.

1 Rainwater inflow section (rainwater inflow pipe)
2,20 Temporary storage part 2a Lid receiving part 2b Lid 20b Water passage hole 2c Connection port (connection port of rainwater inflow part)
2d Connection port (connection port of overflow section)
2e Seal packing 2f Drainage part (orifice)
2g connection port (reservoir connection port)
3 Outflow pipe 3a Overflow section (bottom of outflow pipe)
30 partition wall 30a Overflow section (upper end of partition wall)
DESCRIPTION OF SYMBOLS 4 Storage pipe line 5 Damping part 6 Foreign material collection means 7 Inspection port 8 Drainage basin 8a Inlet 8b Outlet 8c Cylindrical body 8d Recessed part 9 Height adjustment cylinder 10 Intake port 10a Intake pump 11 Downstream drain pipe

Claims (7)

From the rainwater inflow section that allows rainwater to flow into the rainwater drainage pipe, the temporary storage section that temporarily stores the inflowing rainwater, the overflow section that overflows a certain amount of the temporary storage section, and the overflow section A rainwater storage piping structure having a storage pipeline for storing overflowing rainwater, and a damming portion for blocking rainwater provided inside the storage pipeline,
The storage pipe line is substantially horizontal, or a downward slope is provided from the most upstream side to the downstream side, and the bottom of the uppermost stream side is at a position lower than the overflow part,
The upper portion of the damming portion is opened, and the upper end of the damming portion is at a position higher than the top of the storage pipeline,
The temporary storage section has a drainage section that gradually drains rainwater.If the amount of rainwater flowing into the temporary storage section exceeds the amount of rainwater drained from the drainage section, the water level of the temporary storage section rises. A rainwater storage piping structure in which rainwater overflowed beyond the overflow section flows into the storage pipeline.   The rainwater storage piping structure according to claim 1, wherein the temporary storage part and the storage pipe line are connected via an outflow pipe, and the bottom of the outflow pipe is an overflow part.   2. A partition wall having a predetermined height for partitioning the interior of the temporary storage part into an upstream side and a downstream side is provided inside the temporary storage part, and the upper end of the partition wall is an overflow part. The rainwater storage piping structure described.   The rainwater storage piping structure according to any one of claims 1 to 3, wherein a height of a pipe top on the uppermost stream side of the storage pipeline is substantially the same as or lower than a height of the overflow section.   The rainwater storage piping structure according to any one of claims 1 to 4, wherein a foreign matter collecting means is provided upstream of a drainage portion provided in the temporary storage portion.   The rainwater inflow part is a rainwater inflow pipe connected to the temporary storage part, and a foreign matter collecting means is provided at an end of the rainwater inflow pipe on the temporary storage part side. The rainwater storage piping structure described.   The drainage part provided in the temporary storage part is an orifice formed in the bottom face of the temporary storage part or / and the lower end part of the side surface, or an opening covered with a water-permeable sheet. The rainwater storage piping structure according to claim 6.

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