JP5770609B2 - Rainwater piping structure - Google Patents

Description

  The present invention relates to a rainwater piping structure in which rainwater is stored in a storage tank via a filtration member, or is similarly permeated into the underground from an infiltration tank via a filtration member.

  Conventionally, rainwater storage and infiltration systems are used to store and reuse rainwater that is as clean as possible, to prevent the clogging of the infiltration holes in the infiltration tank, or to remove dust accumulated in the tank. In order to reduce the frequency of wastewater, it is common to remove dust and the like mixed in rainwater using a filter member such as a filter. For example, a configuration is known in which a waste collection filter is attached to an inflow pipe of rainwater, and rainwater from which dust has been removed is fed into a tank (see Patent Document 1).

JP 2008-208528 A

  However, the conventional rainwater storage and infiltration system has the following problems. That is, when the system is operated as a rainwater storage system, a fine filtration member is used to increase the purification level of rainwater, or fine particles such as fine sand and gravel are used as a filtration member. If this is used, the water flow performance will deteriorate and it will take time to filter, and most of the rainwater will not pass through the filtration device and will flow out to drainage facilities such as gutters. In order to obtain the available amount of stored water, you have to expect quite a long period of precipitation. On the other hand, when a rough filtration member is used to solve this problem, the stored water is not sufficiently purified, and can only be used for watering the plant.

  Further, when the system is operated as a rainwater permeation system, if a fine filtration member is used to prevent clogging, the water permeation performance is lowered, so that the permeation performance as the permeation system is not sufficiently exhibited. On the other hand, when a rough filtration member is used, the filtration accuracy is lowered, so that the permeation tank is easily clogged, and the outflow suppression effect on the drainage facility is lowered.

  Then, even if it raises the filtration performance of a filtration member, the present invention aims at providing the rainwater piping structure which can ensure high water passage performance as a whole.

The present invention is, rainwater that has passed through the filtration member comprises a bath to penetrate into the underground, by bifurcation into one of the flow path of rainwater flowing toward the predetermined drainage is plurality, the該雨water the tank A rainwater pipe structure that can be introduced, wherein a first branch portion is provided in the rainwater flow path, and the first branch portion has a first inlet through which rainwater flows, and the rainwater enters the tank. A tank introduction port to be introduced, and an outlet for allowing the rainwater to flow downstream toward the drainage facility, and further, a filtration member is disposed between the first inlet and the tank, and The flow path between the outlet of the first branch part and the drainage facility is provided with one or more second branch parts, and rainwater flows through the first branch part into the second branch part. A second inlet, a tank inlet for introducing the rainwater into the tank, and the rainwater flowing downstream toward the drainage facility. And an outlet for the second branching portion located on the most downstream side is provided in the drainage facility, and a filtering member is disposed between the second inlet and the tank. It is considered as a drainage port to be connected , and each tank introduction port of the first branch part and the second branch part is connected to a single same tank, and the tank is a permeation tank that allows rainwater to permeate underground. And the height is set so that the tube bottoms of the respective outlets and the tube bottoms of the respective tank introduction ports are at the same height position in the first branch part and the second branch part, and the outlets and The rainwater piping structure is characterized in that a height of a pipe bottom of the tank introduction port is set to be lower than a height of a pipe bottom of the discharge port .

As described above, the present invention is greatly characterized in that a plurality of tank inlets are provided in one rainwater piping structure. That is, when rainwater is introduced into the tank through each tank introduction port, even if the water passage performance at each tank introduction port is extremely lowered by the individual filtration members and it becomes difficult for rainwater to flow, as a whole The amount of rainwater introduced into the tank is sufficiently secured. Therefore, even if a filtration member with high filtration performance is used in order to improve water purification performance, it is possible to sufficiently secure the water passage performance to the tank as a whole, and to treat a sufficient amount of rainwater as compared with the conventional case. It becomes possible. Furthermore, in such a configuration, in order to prevent clogging of the permeation tank, even when the filtration performance of the individual filtration members is increased and the water flow performance is lowered, the introduction of the tank provided with the filtration members is introduced. Since there are a plurality of mouths, it is possible to sufficiently secure the amount of rainwater introduced into the permeation tank of the entire system. Moreover, since rainwater is introduced into the infiltration tank from a plurality of locations, it is difficult for rainwater to concentrate in one place in the infiltration tank, and the infiltration performance of the infiltration tank can be appropriately and smoothly exhibited in a wider range. Can do.

  It is desirable that each of the first branch portion and the second branch portion is composed of a single piece.

  By adopting such a configuration, it is possible to save the space of each branch portion, and it is possible to provide a rainwater piping structure with no wasteful arrangement as a whole.

Even if the rainwater piping structure of the present invention increases the filtration performance of the filtration member, it has an excellent effect of ensuring high water flow performance as a whole. Therefore, when the tank is a permeation tank, it is possible to effectively prevent clogging of the permeation tank without hindering the smooth inflow of rainwater into the tank, and appropriately ensure the outflow suppression effect on the drainage equipment. .

It is a figure of the rainwater piping structure concerning the reference example 1, (a) is a top view, (b) is XX sectional drawing of (a). It is a figure of the rainwater piping structure concerning the reference example 2, (a) is a top view, (b) is YY sectional drawing of (a). Explanatory view showing from the side the flow of rainwater rainwater pipe structure according to the actual施例.

Hereinafter, embodiments embodying the rainwater piping structure of the present invention will be described in detail. The rainwater piping structure 20A of Reference Example 1 is used as a rainwater storage system. The rainwater piping structure 20B of Reference Example 2 is used as a rainwater infiltration system. In addition, this invention is not limited to the Example shown below, A design change is possible suitably.

[ Reference Example 1]
As shown in FIG. 1a, a rainwater piping structure 20A includes three storage tanks 30A to 30C that are independent from each other, a side groove 16 as a drainage facility, and a first branch provided in a flow path 40 connected to a rain gutter or the like. Part 1 and two second branch parts 2A, 2B arranged on the downstream side of the first branch part 1 are provided.

  Also, as shown in FIGS. 1a and 1b, the first branch part 1 and the second branch parts 2A and 2B are provided with a head adjustment drain 4 and a filter drain 5 with a filter 6 as a filtering member. And the head for adjusting the head 4 and the filter 5 for draining the filter are connected to each other by a straight pipe 7.

(Reservoir)
Each of the storage tanks 30 </ b> A to 30 </ b> C includes a tank body 31. Further, an opening 8 for pipe connection is provided on the upper surface of the tank body 31, and rainwater flows into the tank body 31 through the opening 8. Further, an inspection port 9 is provided on the upper surface of the tank body 31 for taking out stored rainwater and inspecting the inside of the tank. The storage tanks 30A to 30C may be made of concrete, plastic, or the like, and known ones are preferably used.

(First branch)
The head adjusting drainage drain 4 of the first branch 1 includes a first inlet 10 to which the flow path 40 is connected, and a tank side outlet 11 connected to the filter drainage 5 by the straight pipe 7. And an outflow port 12 through which the rainwater flows out downstream.

  In addition, the filter drainage tank 5 of the first branch 1 is introduced into the tank side outlet 11 of the head for adjusting the head drop 4, the inlet 13 connected by the straight pipe 7, and the tank introduced to the storage tank 30 </ b> A. And a mouth 14. The tank introduction port 14 is equipped with a filter 6 as a filtration member.

  In addition, in the said 1st branch part 1, the bottom of the pipe in the position connected to this tank inlet 14 is set by the position where the lower end of the said tank inlet 14 is lower than the lower end of the said outlet 12 Is disposed at a position lower than the bottom of the pipe at the position connected to the outflow port 12.

(Second branch)
The head adjustment drainage drain 4 of the second branch 2A is disposed downstream of the head adjustment drainage drain 4 of the first branch 1. That is, the head adjustment drainage 4 of the second branch 2A is connected to the head adjustment 12 of the first branch 1 by the second inlet 15 connected to the outlet 12 and the straight pipe 7 to the filter drainage 5. The tank side outflow port 11 connected and the outflow port 12 which flows out this rainwater downstream are provided.

  In addition, the filter drainage tank 5 of the second branch 2A is introduced to the tank side outlet 11 of the head for adjusting the head 4 and the inlet 13 connected by the straight pipe 7 and the tank connected to the storage tank 30B. And a mouth 14. The tank introduction port 14 is equipped with a filter 6 as a filtration member.

  Further, a second second branch 2B is connected in series on the downstream side of the second branch 2A. The configuration of the second branch 2B is substantially the same as that of the first second branch 2A. However, the second branch 2B is located on the most downstream side, and the outlet 12 thereof is a discharge port 17 connected to the side groove 16.

  In addition, in the second branch portions 2A and 2B, the lower end of the tank inlet 14 is set at a position lower than the lower end of the outlet 12, so that the pipe at the position connected to the tank inlet 14 The tube bottom is disposed at a position lower than the tube bottom of the pipe at the position connected to the outflow port 12.

  Well-known ones are suitably used for the head adjustment drainage drain 4, the filter drainage drainage 5, the straight pipe 7, and the like used in the first branch portion 1 and the second branch portions 2A and 2B described above. Moreover, the filter 6 as a filtration member may be a wire mesh or a fiber filter, and is not particularly limited. Moreover, the hole diameter of the filter 6 etc. are suitably determined according to the use purpose.

(Rainwater flow)
Next, the flow of rainwater in the rainwater piping structure 20A will be described. In addition, the arrow in FIG. 1 has shown the flow direction of rainwater.

  Rainwater flowing into the first branch 1 from the flow path 40 first flows into the head 4 through the inlet 10 of the head 4 of the first branch 1. Then, the rain water that has fallen in the head for adjusting the head for drainage 4 is preferentially guided to the drain for filter 5. The rainwater that has flowed into the filter drainage trough 5 passes through the filter 6 and then flows out from the tank inlet 14 to the storage tank 30A.

  When the storage tank 30A is full or when there is an inflow of rainwater exceeding the filtration capacity of the filter 6, the rainwater is discharged from the outlet 12 of the head for adjusting the head of the first branch 1 to the head 12. It is guided to the second inlet 15 of the second branch 2A.

  Similarly, in the second branch portion 2A, the rainwater flowing in from the second inlet 15 of the head for adjusting the head 4 is first guided to the filter drain 5 of the second branch portion 2A. Are introduced into the storage tank 30B. Further, when the storage tank 30B is full or when there is an inflow of rainwater exceeding the filtration capacity of the filter 6, the second second branch is disposed further downstream. It is led to the second inlet 15 of the part 2B.

  Further, in the second branch portion 2B as well, the rainwater flowing in from the second inlet 15 of the head for adjusting the head 4 is introduced into the storage tank 30C through the filter 6 for the filter drain 5. When the storage tank 30C becomes full of water, or when there is an inflow of rainwater exceeding the filtration capacity of the filter 6, the rainwater is adjusted to the head of the second branch 2B. That is, it is discharged from the discharge port 17 to the side groove 16.

  Thus, since the rainwater piping structure 20A is provided with a plurality of tank introduction ports 14 with respect to one rainwater piping structure 20A, the filter 6 attached to each tank introduction port 14 uses the filter 6 attached to each tank introduction port 14. Even if the water flow performance is extremely reduced, the rainwater introduction amount to the storage tanks 30A to 30C is sufficiently secured as a whole by using the other adjacent storage tanks 30A to 30C. Therefore, even if the fine filter 6 is used to improve the water purification performance, the water passage performance to the storage tanks 30A to 30C can be sufficiently secured as a whole.

  The rainwater piping structure 20A is configured to preferentially introduce rainwater into the first storage tank 30A. Rather than storing rainwater in a single large storage tank, it is more likely that a small amount of rainfall will occur if you prepare multiple storage tanks of a smaller size and fill each tank in turn. This is because it is easy to use the stored rainwater even if the amount is large.

  Instead of the configuration described so far, the type of the filter 6 may be different for each tank introduction port 14, and rainwater for different uses may be stored for each of the storage tanks 30A to 30C. For example, the fine filter 6 is applied to the tank inlet 14 corresponding to the storage tank 30A to store domestic water at the time of an emergency disaster, and the tank inlet 14 corresponding to the storage tank 30B is relatively coarse. You may make it store the water for watering a plant by applying the filter 6.

  Further, in the configuration described so far, the storage tanks 30A to 30C are provided for each of the branch portions 1, 2A, and 2B. Instead, each of the branch portions 1, 2A, and 2B has a single storage. You may make it connect with the tank 30A. Further, for example, the storage tank 30A may be connected to the first branch portion 1, and one storage tank 30B may be connected to the second branch portions 2A and 2B.

[ Reference Example 2]
Hereinafter, the rainwater piping structure 20B will be described with reference to FIG. In addition, about the part which is common in the reference example 1, description is simplified or abbreviate | omitted and it shall attach | subject the same code | symbol in a figure.

  The rainwater piping structure 20B includes a single infiltration tank 30D. As the permeation tank 30D, a known technique such as one using crushed stone or one made of resin can be suitably used.

  Rainwater is introduced into the permeation tank 30D through the tank inlet 14 in the first branch 1 and the tank inlets 14 and 14 in the second branches 2A and 2B. Moreover, in each branch part 1, 2A, 2B, the lower end of the tank inlet 14 is set at a position lower than the lower end of the outlet 12, and the pipe bottom of the pipe at the position connected to the tank inlet 14 is It is arranged at a position lower than the bottom of the pipe at the position connected to the outlet 12.

  In the above configuration, in order to prevent the permeation tank 30D from being clogged as much as possible, if the filtration performance of the filter 6 is high, the water flow performance is lowered and only the tank inlet 14 of the first branch part 1 is smooth. May not be introduced into the permeation tank 30D. However, since the permeation tank 30D is provided with a plurality of tank introduction ports 14 to which the filter 6 is attached, the amount of rainwater introduced into the permeation tank 30D can be sufficiently secured as a whole, and the water flow performance is sufficiently high. Can be secured.

  Further, since rainwater is introduced into the infiltration tank 30D from a plurality of locations, the rainwater is less likely to concentrate in one place in the infiltration tank 30D, and the infiltration performance of the infiltration tank 30D is appropriately and smoothly in a wider range. It can be demonstrated. Moreover, since rainwater preferentially flows into the permeation tank 30D, it is possible to prevent the rainwater from flowing out excessively into the side groove 16, and the outflow suppression effect on the side groove 16 is appropriately ensured.

[Others]
The present invention is not limited to Reference Examples 1 and 2 described above, and the design can be changed as appropriate. For example, the first branch part 1 and the second branch parts 2A and 2B are not composed of the head adjusting drain 4 and the filter drain 5 connected to each other, but the head adjusting drain is provided with a filter function. You may make it comprise with a single-piece | unit item. By adopting such a configuration, it is possible to save the space of each of the branch portions 1, 2 </ b> A, 2 </ b> B, and the rainwater piping structures 20 </ b> A, 20 </ b> B are disposed without waste as a whole.

  It is desirable that the filter 6 has a replaceable structure in order to prevent functional deterioration of the rainwater piping structures 20A and 20B. Moreover, you may use a screen filter etc. as a filtration member.

  The second branch parts 2A and 2B are not limited to two and may be three or more. Conversely, only one may be arranged downstream of the first branching section 1.

  Further, in the rainwater piping structure 20B provided with the permeation tank 30D, as shown in FIG. 3a, the pipe bottoms of the pipes at the pipe connection port of the outlet 12 are made to be the same height in each branch part 1, 2A, 2B, and The first inlet 10 of the first branch 1 and the outlet 12 serving as the outlet 17 may be set at a position higher than these. By adopting such a configuration, rainwater can be stored in the pipe portion that is one step lower than the pipe connected to the flow path 40 and the side groove 16 until the amount of rainwater reaches a certain amount. Therefore, the storage amount of the rainwater pipe structure 20B is temporarily stored. The rainwater can be prevented from flowing into the side groove 16 by increasing the number of Furthermore, as shown in FIG. 3 b, the heights of the pipes at the tank side outlet 11, outlet 12, inlet 13, and tank inlet 14 are set so that the bottoms of the pipes are at the same height. You may make it. By adopting such a configuration, it is possible to distribute rainwater almost equally to the tank inlets 14 of the branch portions 1, 2A, 2B.

1 1st branch part 2A, 2B 2nd branch part 6 Filter (filtration member)
10 First inlet 12 Outlet 14 Tank inlet 15 Second inlet 16 Gutter (drainage facility)
17 Discharge port 20A, 20B Rainwater piping structure 30A-30C Storage tank (tank)
30D Osmosis tank (tank)
40 channels

Claims (2)

Comprising a vessel to infiltrate rainwater that has passed through the filtration member to the underground, by bifurcation into one of the flow path of rainwater flowing toward the predetermined drainage is plurality, is a該雨water can be introduced into the vessel Rainwater piping structure,
A first branch part is provided in the flow path of the rainwater, the first branch part has a first inlet through which rainwater flows, a tank inlet for introducing the rainwater into the tank, and the drainage for the rainwater. An outlet that flows downstream toward the bottom, and further, a filtration member is disposed between the first inlet and the tank,
In addition, the flow path between the outlet of the first branch part and the drainage facility is provided with one or more second branch parts, and the second branch part is rainwater that has passed through the first branch part. A second inlet through which the rainwater flows, a tank introduction port for introducing the rainwater into the tank, and an outlet through which the rainwater flows downstream toward the drainage facility, and the second inlet And a filtration member is disposed between the tank and the outlet of the second branch located on the most downstream side is a drain outlet connected to the drainage facility ,
Each tank inlet of the first branch part and the second branch part is connected to a single same tank, and the tank is a permeation tank that permeates rainwater underground.
In the first branch part and the second branch part, the height of the pipe bottom of each outlet and the pipe bottom of each tank inlet are set to the same height position, and the outlet and the tank The rainwater piping structure is characterized in that the height of the pipe bottom of the introduction port is set to be lower than the height of the pipe bottom of the discharge port .   The rainwater piping structure according to claim 1, wherein each of the first branching portion and the second branching portion is configured by a single piece.

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