JPH0336628Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a rainwater infiltration system that allows rainwater to permeate into the ground of residential areas, roadside tree zones, parks, etc.

(Prior Art) In recent years, as many roads have been paved, phenomena such as an increase in the peak volume of floods, a shortage of groundwater, ground subsidence, and insufficient irrigation of trees have occurred. As a countermeasure for this, conventionally, a rainwater infiltration system as shown in Fig. 7 has been used.

This rainwater infiltration cell is constructed by using a porous concrete pipe of a predetermined length with a permeable pipe wall as the cell main body 1a, burying it underground, and forming a permeation layer 2a of crushed stone or the like at the bottom. It is something. still,
3a is an inflow pipe, which is connected to a rain gutter or the like. 4a is a lid with an overflow hole 5a
is provided.

However, in the conventional rainwater infiltration basin mentioned above, (1)
The tube wall of the main body is a porous permeable pipe, while the bottom of the main body is covered with crushed stones to form a permeable layer.
As the filter becomes clogged with sand, garbage, etc., its function as a permeation basin is impaired, and if it becomes clogged, it cannot be replaced, and after a long period of time, rainwater will no longer penetrate into the basement at all. I had a problem with getting used to it.

The present applicant has previously applied for a rainwater infiltration system shown in Figs. 4 to 6 as a rainwater infiltration system that solves this problem. That is, a penetration hole 4b is provided in the side wall 1b, an inlet 2b is provided in the tangential direction of the circumference of the bottomed cell main body whose bottom inner peripheral surface 11b is approximately in the shape of an inverted cone, and one end 51b is connected to the outlet 3b. This is a rainwater infiltration basin in which a connecting discharge pipe 5b is provided inside the main body at a predetermined distance from the bottom surface of the main body.

(Problem that the invention attempts to solve) However, in the rainwater infiltration basin mentioned above,
Since the main body of the basin is one piece, the installation positions of the inlet and outlet are determined, and depending on the location of the basin, it is necessary to prepare several types of rainwater infiltration basins. However, there was a problem of high cost. Although it is possible to provide the inlet and outlet by drilling holes at the construction site, it is time-consuming and increases the construction cost.

(Means for Solving the Problems) In view of the problems described above, the present invention is capable of allowing rainwater to permeate into the ground for a long period of time without clogging and requiring no maintenance at all. Of course, the purpose is to provide a rainwater infiltration basin that can be applied with one type of infiltration basin regardless of the positional relationship of the place where it is installed. The fitting portion of the bottomed lower cell is provided with an inlet in the circumferential tangential direction of the side wall, and a fitting portion is provided on the upper edge,
The lower edge of the upper chamber is removably fitted with an outlet provided in the side wall.A body is formed, and a discharge pipe, one end of which connects to the outlet of the upper chamber, is connected to the bottom of the lower chamber at a predetermined distance. A rainwater infiltration basin is installed inside the main unit.

(Function) As mentioned above, since the inlet for rainwater is provided in the tangential direction of the inner circumference of the side wall of the lower cell, and the inner circumferential surface of the bottom of the lower cell is approximately in the shape of an inverted cone, rainwater flows into the lower cell. The rainwater is centrifugally accelerated in a spiral vortex along the inner peripheral surface of the main body and flows into the bottom. The rainwater that flows in penetrates into the ground through the infiltration hole provided in the side wall, and after reaching the position of the outlet, the rainwater is drained from the outlet through the discharge pipe to, for example, a sewer pipe. at the same time,
Since the mud, sand, and garbage contained in rainwater are concentrated in the center of the bottom of the lower chamber, they are also discharged into the sewer pipes along with the rainwater. In addition, since the main body of the cell is composed of a lower cell and an upper cell that are removably fitted, the state of engagement between the lower cell and the upper cell can be maintained regardless of the positional relationship of the place where the penetration cell is installed. You can arbitrarily change the positional relationship between the rainwater inlet and outlet by simply shifting them.

(Example) Hereinafter, an example of the rainwater infiltration basin of the present invention will be described based on the drawings.

FIG. 1 is a front view showing an embodiment of the rainwater infiltration basin of the present invention, FIG. 2 is a cross-sectional view taken along the line - FIG. 1, and FIG. 3 is a cross-sectional view taken along the line - FIG.

Reference numeral 1 denotes a bottomed cell main body made of vinyl chloride resin or the like, and is composed of a lower cell 2 and an upper cell 3. A fitting portion 21 is formed at the upper edge of the lower cell 2, and the lower edge of the upper cell 3 can be fitted and connected. The outer diameter of the lower edge of the upper cell 3 is approximately equal to the inner diameter of the fitting portion 21 of the lower cell 2. An inlet 4 for rainwater is provided in the side wall of the lower cell 2, and an outlet 5 is formed in the side wall of the upper cell 3. The outflow port 5 is provided above the inflow port 4. The inlet 4 is provided in the circumferential tangential direction of the side wall of the lower cell 2, as shown in FIG. The inlet 4 is connected to a rain gutter (not shown), and the outlet 5 is connected to a sewer pipe (not shown). The bottom inner circumferential surface 22 of the lower cell 2 has a substantially inverted conical shape, as shown in FIG. Reference numerals 6 and 7 indicate circular penetration holes, which are provided in plural on the side walls of the lower cell 2 and the upper cell 3. The permeation holes 6 and 7 may be provided so as to be located at least above the inlet 4.

Reference numeral 8 denotes an inverted L-shaped discharge pipe, one end 81 of which is connected to the outlet 5, and the other end 82 maintained at a predetermined distance from the bottom surface of the central portion of the lower chamber 2. The discharge pipe 8 only needs to have an inner diameter of about 20 to 30 mm, and the other end 82 of the discharge pipe and the lower part 2
The distance between the base and the bottom should be about 20 to 40 mm. still,
9 is a lid.

Next, the manner of use of the above embodiment will be explained. The rainwater infiltration basin of the present invention is used, for example, by being buried in a residential area. Rainwater falling on the roof of the house flows into the rainwater infiltration basin from the inlet 4 through the rain gutter. At this time, since the inlet 4 is provided in the circumferential tangential direction of the side wall of the lower cell 2, the rainwater is centrifugally accelerated in a spiral vortex along the inner circumferential surface of the lower cell 2 and flows into the bottom. , the water level rises. When the water level reaches the position of the infiltration hole 6, the rainwater flows through the infiltration hole 6.
It begins to seep into the ground. At this time, mud, sand, dirt, etc. contained in the rainwater are concentrated at the center of the bottom of the lower cell 2 by the centrifugally accelerated vortex flow, so that they are not discharged through the seepage holes 6.

Furthermore, when the water level rises and exceeds the position of the outlet 5, the rainwater is drained to the sewer pipe through the discharge pipe 8 and permeates into the ground through the seepage hole 7. At this time, mud contained in rainwater,
Sand, dirt, etc. are concentrated at the center of the bottom of the main body 1 by the centrifugally accelerated eddy current, and are discharged together with rainwater to the sewer pipe through the discharge pipe. Therefore, the rainwater that permeates into the ground through the permeation holes 6 and 7 does not contain mud and is clean water.

To change the positional relationship between the rainwater inlet 4 and the rainwater outlet 5, the upper box 3 can be rotated in the circumferential direction.

In addition, in this invention, it is also possible to use an additional ring in combination between the upper and lower cells or on top of the upper cell, in which case a connection port for the penetration pipe can be provided on the side wall of the additional ring. It is best to set this up in advance.

(Effects of the invention) As described above, according to the invention, the rainwater inlet is provided in the tangential direction of the circumference of the lower cell, and the inner circumferential surface of the bottom of the lower cell is approximately in the shape of an inverted cone. The rainwater flowing into the cell is accelerated in a spiral shape along the inner peripheral surface of the lower cell and flows into the bottom, and the rainwater that flows into the cell permeates into the ground through the infiltration hole provided in the side wall, and the rainwater is absorbed into the ground. After reaching the location of the outlet, the rainwater is drained from the outlet through the discharge pipe, for example into a sewer pipe.

In addition, due to the centrifugal force of the eddy current, mud, sand, dirt, etc. contained in the rainwater are concentrated at the center of the bottom of the main body of the cell, and are discharged together with the rainwater to the sewer pipe through the discharge pipe. For this reason, mud, sand, dirt, etc. do not accumulate inside the seepage chamber, and since these are not discharged into the ground through the seepage holes provided in the side walls, no maintenance is required at all, and the seepage of the seepage chamber ability can be maintained over a long period of time.

Furthermore, since the main body of the cell is composed of a lower cell and an upper cell that are removably fitted, the state of engagement between the lower cell and the upper cell can be maintained regardless of the positional relationship of the place where the penetration cell is installed. The positional relationship between the rainwater inlet and outlet can be changed arbitrarily by simply shifting the rainwater in the circumferential direction. Therefore, it is only necessary to prepare one type of infiltration mass, and processing costs, construction costs, etc. are reduced.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of the rainwater infiltration basin of the present invention, Figure 2 is a sectional view taken along the line - Figure 1, Figure 3 is a sectional view taken along the line - Figure 1, and Figures 4 to 6. Figure 4 shows the front view of the rainwater infiltration basin that was applied for earlier, and Figure 5 shows the rainwater infiltration basin that was applied for earlier.
6 is a cross-sectional view taken along the line of FIG. 4, and FIG. 7 is a vertical cross-sectional view showing a conventionally known rainwater infiltration basin. 1: Main body, 2: Lower square, 21: Fitting part,
22: Bottom inner peripheral surface, 3: Lower part, 4: Inlet,
5: Outlet, 6, 7: Penetration hole, 8: Discharge pipe.

Claims (1)

[Scope of utility model registration request] The inner peripheral surface of the bottom part has a substantially inverted conical shape, an inlet is provided in the tangential direction of the circumference of the side wall, and a fitting part is provided on the upper edge. The lower edge of the upper chamber provided with the outlet is removably fitted to form the main body.
A rainwater infiltration system characterized in that a discharge pipe, one end of which is connected to the outlet of the upper compartment, is installed inside the main body at a predetermined distance from the bottom of the lower compartment.