JP3065271U - Rainwater runoff control and reuse facility - Google Patents

Abstract

(57) [Summary] [Problem] To reuse rainwater to reduce water and sewage usage fees, and to control rainwater that cannot be used to discharge it to storage and infiltration facilities. SOLUTION: A water intake pipe 31 for pumping rainwater, a water supply pipe 4 for replenishing clean water, and a water level sensor on the same side as the water intake pipe 21 of the water storage tank 2 having a water intake pipe 21 into which rainwater flows and a partition plate 24.
23, a small-diameter orifice pipe 51 that opens to the height of the partition plate on the opposite side, and a large-diameter overflow pipe near the ceiling
52 is opened, and a storage and infiltration facility 6 in which pits are filled with glass cullet is connected downstream of these discharge systems 5.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is to control rainwater discharge by installing rainwater in individual houses or in public facilities such as apartment buildings and schools instead of regulating ponds that are installed along with the development of residential land. Regarding reuse facilities.

[0002]

[Prior art]

 When constructing residential land of a certain size or more, it is required by law to set up a regulating pond with a prescribed capacity and discharge it from this to the sewer in order to suppress the temporary large outflow of rainwater. However, the fact that a certain area must be applied to the regulating pond even if the residential land is created is not preferable from the viewpoint of effective use of the national land, and the sales area is also reduced for developers, and residents, especially after installation, There are problems such as danger of accidents for infants and children. It has also been pointed out that the water retention capacity in the development area has been extremely reduced because rainwater runoff is controlled only by regulating ponds. On the other hand, the water collection tanks installed in large buildings are also intended to temporarily store rainwater, and the rainwater stored in these regulating ponds and water collection tanks is gradually discharged to the sewer at a constant flow rate. No, and overflow water exceeding these capacities is discharged directly to the sewer at that time, causing river and sea pollution.

[0003] Furthermore, no special measures have been taken against acid rain, which has become a problem in recent years, and there is also a problem that soil contamination is feared because it is permeated into groundwater as it is.

[0004]

[Problems to be solved by the invention]

 The present invention solves these problems, saves rainwater in a water storage tank and reuses it to reduce the amount of water used, and reduces and discharges rainwater that cannot be reused. The objective is to realize a rainwater runoff control and reuse facility that does not allow rainwater on the roof to flow out of the site by infiltrating the discharged rainwater into the basement.

[0005]

[Means for Solving the Problems]

 The present invention includes a rainwater pipe connected to a rain gutter provided on a roof of a house or the like, an inflow pipe connected to the rainwater pipe, and a water receiving pipe installed on the premises and connected to the inflow pipe. A water tank having a partition plate from the water supply level to a water supply level, a water level sensor for detecting a water level in the water tank, an intake pipe for pumping water in the water tank and supplying the water to a reuse system, and the water level. A water pipe for refilling the water tank with the signal of the sensor, a small-diameter orifice pipe that opens to the maximum storage level in the water tank and gradually discharges the water in the water tank; This is a rainwater runoff control and reuse facility that has a large-diameter overflow pipe that opens near the ceiling of the water tank and discharges a large amount of water in the water tank, and the intake pipe, water pipe, and water level sensor store water. Opening or opening on the same side as the receiving pipe with respect to the partition plate in the tank And the orifice pipe is opened on the opposite side to the partition plate in the water storage tank, and preferably, the inflow pipe is opened at a position near the bottom of the partition plate. A non-return damper that opens only on the side of the pit is provided.More preferably, a water-permeable sheet is laid at the bottom of the pit excavated in the ground downstream of the orifice pipe and overflow pipe, and the stone is injected into the upper part of the pit. It is connected to a storage infiltration facility that has a cullet layer filled with glass scarlet in the gap.

[0006]

[Embodiment of the invention]

 One embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a system diagram showing the configuration of the rainwater runoff control and reuse facility of the present invention. Fig. 2 is a partial cross-sectional view showing the main part of the facility. A horizontal rain gutter, 12 is a rainwater pipe connected to this, 13 is an inflow pipe connected further downstream, 14 is a filter provided at the inlet of the inflow pipe 13, 2 is buried in the site, for example, underground A water storage tank, 21 is a water receiving pipe thereof, 22 is a filter provided at an inlet thereof, 23 is a water level sensor of a tri-pole type or the like for detecting a water level inside the water storage tank 2, 24 is provided inside the water storage tank 2, A partition plate extending from the bottom to the level of the water supply level, 25 is a check damper that is provided with an opening at the bottom of the partition plate 24 and is installed to cover it, 3 is a rainwater recycling system, and 31 is a rainwater reuse system Intake pipe for pumping rainwater stored in water storage tank 2, 32 for intake pump, 33 for use of pumped rainwater One of these is a toilet faucet, 34 is a sprinkler for using rainwater in the garden, including watering the lawn, and 4 is a water level in the water tank 2 that is low, making it difficult to pump it up for reuse. A water pipe for replenishing water from the water supply at a certain time, 5 is a drainage system that discharges water in the water tank 2 that cannot be used in the reuse system, and 51 is a maximum storage level in the water tank 2 The orifice pipe 52 has a small diameter and is opened near the ceiling of the water tank 2 so that the water in the water tank overflows when the water in the water tank overflows. A large-diameter overflow pipe for discharging air, 53 is a discharge pipe connected downstream of the orifice pipe 51 and the overflow pipe 52, and 6 will be described later with reference to FIG. This is a storage and infiltration facility that infiltrates the inside.

That is, in the rainwater runoff control and reuse facility of the present invention, rain that has fallen on the roof of a house or the like is collected by the inflow system 1 and stored in the water storage tank 2, and is collected and reused by the reuse system 3. The primary purpose is to reduce the amount of water used by effectively utilizing water. Next, when the water in the water storage tank 2 cannot be fully used in the reuse system due to continuous rain, etc., the water is gradually overflowed by the orifice pipe 51, and a large amount of water in a short time, such as a typhoon or a torrential rain. The second purpose is to discharge the rain at a stretch by the overflow pipe 52 and guide it to the storage and infiltration facility 6 to infiltrate into the ground.

Here, the water level in the water storage tank will be described with reference to FIG. FIG. 2 is a partial cross-sectional view showing the main part of FIG. As shown in FIG. 2, this water tank 2 has three control water levels from W.L.1 to W.L.3. First, WL1 is at the lowest level, and if the water level falls below this level, the reuse system 3 cannot operate. Therefore, in the event of a shortage of rainwater, water must be replenished to maintain the water level in the storage tank above this level. Must. Therefore, when the water level sensor 23 detects that the water level has dropped to W.L.1, the valve of the water pipe 4 is opened to supply fresh water. Therefore, in order to minimize the supply amount of clean water, the water receiving pipe 21 is arranged close to one end in the water storage tank, and a partition plate 24 is provided outside the water receiving pipe 21, and the water intake pipe 31, the clean water pipe 4, and the water level sensor 23 are arranged. An opening or arrangement is made on the same side as the water receiving pipe 21 with respect to the partition plate 24, so that when rainwater is in short supply, water is allowed to flow in and out of this only to minimize the amount of water supply. It is desirable. Further, as shown in FIG. 2, an opening is provided at the lower portion of the partition plate 24 so as to block the inside from the side (the side where the water intake pipe 21 and the water intake pipe 31 are provided), that is, only on the side where the water intake pipe 21 is open. If the check damper 25 is attached so as to open, the supply amount of clean water can be further reduced.

This will be described with reference to FIG. (A) is a case where the check damper 25 is not provided. The water outside the partition plate 24 (left side in the figure) cannot be sucked up by the intake pipe 31 and remains as dead stock. When the water level inside the partition plate 24 falls, the water is discharged while the water in the water storage tank 2 remains. Will be replenished. (B) shows a case where a check damper 25 is provided. When the water level reaches the same level as in (a), the water outside the partition plate 24 enters the inside of the partition plate 24 as indicated by an arrow until the water levels on both sides are equal by opening the check damper 25. If there is no inflow of rainwater and the water level in the water storage tank drops to WL1, water is replenished from the water pipe 4, but if the water level inside the partition plate 24 rises, the check damper 25 closes. It is performed only on the inside of the partition plate 24, and the supply amount is small.

Returning to FIG. 2, the water level of the discharge system will be described. In the water storage tank 2, W.L.2 is set as the discharge suppression level at the height of the maximum storage level (can be set arbitrarily), and the tip of the orifice pipe 51 is opened at this position. The orifice pipe 51 extends out of the water tank, and its end is opened to the discharge pipe 53 at the same level as or less than the tip of the orifice pipe. The orifice pipe 51 is, for example, a small-diameter pipe having an inner diameter of 20 mm. When the water level in the water storage tank is higher than W.L.2, the water in the water storage tank is gradually discharged. The water from W.L. 1 to W.L.2 in the water tank is the rainwater use layer. The orifice pipe 51 is opened on the side opposite to the water receiving pipe 21 with respect to the partition plate 24.

When a large amount of water enters the water tank 2 at one time due to a torrential rain or the like, the water level in the water tank rises due to the shortage of water discharged only by the orifice pipe 51, and the water level exceeds WL3. At this point, a large amount of water is discharged from the overflow pipe 52. W.L.3 is the storage limit level, and the water level from W.L.2 to W.L.3 is the runoff control layer. If the large inflow of water stops, only the outflow from the orifice tube 51 remains, and the water level eventually stabilizes at W.L.2.

The rainwater flowing out of the orifice pipe 51 or the overflow pipe 52 is preferably guided to the downstream storage and infiltration facility 6 via the discharge pipe 53. However, in areas where it cannot penetrate, the water is discharged directly from the discharge pipe 53 to the sewer. Next, the storage and infiltration facility 6 will be described with reference to FIG. In this example, a water storage tank 2 and a storage infiltration facility 6 are installed below the parking space of a house. C is a parked car. In the storage and infiltration facility 6, a water permeable sheet 64 is laid at the bottom of the pit excavated in the ground, and the upper part of the pit is filled with rock stone. Crushed stone is spread over the top to form a crushed stone layer 62, and a cullet layer 63 and a basin 61 are buried in the crushed stone layer 62. It comes out. The crushed stone layer 62 is a support layer for the pavement of the upper parking lot. In FIG. 4, the end of the orifice pipe 51 and the overflow pipe 52 are directly opened in the reservoir 61, but a discharge pipe 53 may be interposed between them as shown in FIG.

The rainwater flowing from the water storage tank 2 into the reservoir 61 via the orifice pipe 51 or the overflow pipe 52 drops into the cullet layer 63 and permeates into the ground from the water-permeable sheet 64. By the way, the cullet obtained by pulverizing glass has a maximum particle size of about 6 mm and has a pH adjusting ability to neutralize acid rain. According to the experiment, cullet was packed in a glass cylinder with an inner diameter of 12 mm to 5 kinds of thicknesses of 1 to 5 cm, and 60 ml of artificial acid rain of pH 4.73 was allowed to flow down at a rate of 0.77 ml per minute to adjust the pH after flowing down. As a result of measurement, results of 7.34 to 9.40 were obtained. Therefore, in the storage and infiltration facility 6, while flowing down the cullet layer 63, the acid rain is neutralized by the cullet, becomes neutral or weakly alkaline, and penetrates into the ground. This has the effect of not only reducing rainwater to groundwater, but also eliminating the effects of acid rain on water quality and soil.

In the above description, the water tank 2 is buried underground. However, the present invention is not limited to this. Even if the water tank 2 is installed on the ground, the purpose of the present invention is achieved. Of course.

[0015]

[Effect of the invention]

 The present invention makes it possible to reuse rainwater by effectively using the premises, and to minimize the amount of water supply even when rainwater is scarce. It has excellent effects, such as eliminating the effects of acid rain and then permeating the ground to reduce it to groundwater and preventing inundation in the lower river basin.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a partial sectional view showing a main part of FIG.

FIG. 3 is an explanatory view illustrating the operation of the partition plate and the check damper in the water storage tank in the embodiment of the present invention.

FIG. 4 is a sectional view of the storage and infiltration facility according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inflow system 2 Reservoir 3 Reuse system 4 Water pipe 5 Drainage system 6 Storage / penetration facility 11 Rain gutter 12 Rainwater pipe 13 Inflow pipe 14, 22 Filter 21 Receiving pipe 23 Water level sensor 24 Partition plate 25 Non-return damper 31 Intake pipe 32 Water supply Pump 33 Toilet faucet 34 Sprinkling faucet 51 Orifice pipe 52 Overflow pipe 53 Drain pipe 61 Reservoir basin 62 Crushed stone layer 63 Cullet layer 64 Permeable sheet C Car R Roof

Claims (3)

[Utility model registration claims] 1. A rainwater pipe (12) connected to a rain gutter (11) provided on a roof of a house or the like, an inflow pipe (13) connected to the rainwater pipe (12), A water storage tank (2) having a water receiving pipe (21) connected to the inflow pipe (13) and having therein a partition plate (24) having a height from the bottom to the level of the water supply amount; and a water storage tank (2). A water level sensor (23) for detecting a water level, an intake pipe (31) for pumping water in a water storage tank (2) and supplying water to a reuse system (3); and a water storage tank (23) based on a signal from the water level sensor (23). 2) A water pipe (4) for replenishing clean water into the water tank, and a small-diameter orifice opening to the maximum storage level in the water tank (2) and gradually discharging water from the water tank (2). It has a pipe (51) and a large-diameter overflow pipe (52) which is opened near the ceiling of the water tank (2) and discharges a large amount of water in the water tank (2). A rainwater runoff control and reuse facility, wherein the water intake pipe (31), the water pipe (4), and the water level sensor (23) are attached to the partition plate (24) in the water storage tank (2) by the water receiving pipe (21). ), The orifice pipe (51) is placed or arranged on the same side as the partition plate (24) in the water storage tank (2).
A rainwater runoff control and reuse facility that is open to the other side of the facility. 2. At a position near the bottom of the partition plate (24),
The rainwater outflow suppression and reuse facility according to claim 1, wherein a check damper (25) that opens only on the side where the inflow pipe (21) is open is provided. 3. A water-permeable sheet (64) is laid at the bottom of a pit excavated in the ground at the downstream side of the orifice pipe (51) and the overflow pipe (52). The rainwater runoff control and reuse facility according to claim 1 or 2, wherein a storage and infiltration facility (6) provided with a cullet layer (63) filled with glass cullet is connected.