JPH0248550Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a rainwater basin miscellaneous item that is installed in a rainwater basin that collects rainwater and discharges it underground or into a sewer pipe, and that removes impurities mixed into the rainwater. Relating to a removal device.

[Conventional technology]

When rainwater is collected in a rainwater basin and discharged into a permeable layer formed underground or into a sewer pipe, if foreign matter such as garbage mixed into the rainwater is not removed, the permeable layer will become clogged and the sewer pipe will become clogged. Cheap. For this reason, rainwater catchments are usually equipped with means for removing impurities. As this means, proposals disclosed in Japanese Utility Model Application Publication No. 59-38588 and Japanese Utility Model Application Publication No. 60-40585 are known. As shown in Figure 8, the former is rainwater basin 1.
A first miscellaneous goods storage tool 3 having a support plate 2 removably attached to the upper surface of the support plate 2 and having a water passage hole 3a in the support plate 2.
A second miscellaneous goods storage device 4 in the form of a net bag is removably attached to the support plate 2, and the first miscellaneous goods storage device 3 is located inside an opening formed above. Rainwater flowing in from above the basin 1 is passed through the first miscellaneous storage device 3 and the second miscellaneous storage device 4, and the miscellaneous materials mixed in the rainwater are collected by both storage devices 3 and 4. It is something. In addition, as shown in FIG. 9, the latter is provided with a perforated substrate 7 that can be elastically deformed so as to be placed on the permeable layer 6 laid in the bottom opening 5a of the rainwater basin 5. Attach the filter material 8 and lift the perforated substrate 7 to the member 9 and support column 1
The filter material 8 can be lifted upward through the filter material 8.
The miscellaneous materials collected can be easily taken out of the rainwater basin 5.

[Problem that the invention attempts to solve]

However, according to the first proposal, although the first miscellaneous goods storage device 3 can collect bulky garbage and the second miscellaneous goods storage device 4 can collect fine particle garbage, Since the entire amount of rainwater passes through both storage devices 3 and 4, there is a problem that the second storage device 4, which is shaped like a net bag, gets clogged quickly.

Also, according to the second proposal, the filter material 8
There was a problem that the holes were clogged quickly and the workability of mounting and removing the perforated substrate 7 was poor.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a rainwater basin impurity removal device that can reliably remove impurities from rainwater flowing into a rainwater basin and that is easy to maintain and manage. With the goal.

[Means for solving problems]

A configuration for achieving the above object will be described with reference to drawings corresponding to embodiments. The rainwater basin miscellaneous matter removal device 17 of the present invention includes the upper lid 18 of the rainwater basin 12.
A first overflow portion is removably attached to the lower part and protrudes inward from the bottom surface 13a.
a secondary treatment tank 13 having a drain pipe 14 and a second drain pipe 15 connected to the bottom surface 13a and capable of draining water to the sewer pipe 19;
A water-permeable primary treatment tank 16 is removably attached to the upper part of the tank.

[Effect]

According to the above configuration, coarse impurities are removed in advance by the primary treatment tank 16, and the initial rainwater with a small flow rate and a large pollution load flows directly from the second drain pipe 15 to the sewer pipe 19, and is transferred to the rainwater infiltration pipe 20 or the bottom. There is no flow into the permeation section 21. After the initial rainwater inflow, when the amount of rainfall increases and the water level in the secondary treatment tank 13 rises, the rainwater flows to the first drain pipe 14 for overflow.
The rainwater enters the inside and flows into the rainwater infiltration pipe 20 or the bottom infiltration part 21. Since the pollution load of rainwater at this point is extremely small, clogging of the infiltration part is unlikely to occur.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a rainwater basin dirt removal device according to the present invention will be described with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 and 2.
Reference numeral 11 denotes a mass plate made of vinyl chloride plate, etc., which is attached to the upper opening of the rainwater basin 12, and a bottomed box-shaped secondary treatment made of polypropylene or the like is installed in the mounting hole 11a formed in this mass plate 11. A tank 13 is detachably attached. The bottom surface 13a of the secondary treatment tank 13 has a first overflow pipe 14 of a predetermined height protruding inward, and an opening toward a sewer pipe 19 shown in FIGS. 3 and 4. A second drain pipe 15 is fixedly installed. The second drain pipe 15 has a tip bent into an L shape toward the sewer pipe 19. At the top of the secondary treatment tank 13 is a primary treatment tank 16 in the shape of a coarse mesh made of polypropylene or the like.
is removably installed, and this primary treatment tank 1
The upper end surface of the secondary treatment tank 13 is latched to the upper end surface of the secondary treatment tank 13 via a flange portion 16a formed on the outer periphery of the upper end of the secondary treatment tank 6. These primary treatment tank 16, secondary treatment tank 13, and drain pipes 14 and 15 constitute a foreign matter removal device 17.

Next, a structure for attaching the impurities removal device 17 to the rainwater basin 12 according to this embodiment will be explained with reference to FIG. 3.
A top cover 18 is provided on the top of the rainwater basin 12 formed in a frame shape from concrete so that it can be opened and closed via a step 12a, and a mass plate 11 fixed to the step 12b is directly below the top cover 18. A foreign matter removing device 17 is removably attached via the .
In addition, a second drain pipe 15 is installed on one side of the rainwater basin 12.
A sewer pipe 19 is provided at a position aligned with the open end of the sewer pipe 19 on the other side of the rainwater basin 12.
A rainwater infiltration pipe 20 is installed at a position lower than 9. In addition, the bottom of the rainwater basin 12 and the rainwater infiltration pipe 2
A permeation part 21 made of crushed stone or the like is provided around 0.

Next, the operation of this embodiment will be explained. As shown in FIG. 5, the amount of initial rainwater that flows into the rainwater basin 12 is generally small and the pollution load is large. As time passes from the beginning of rain, the amount of rainwater flowing in increases, and conversely, the pollution load decreases. In such initial rainwater, bulky garbage such as dead leaves and branches can be removed in the primary treatment tank 16, and the rainwater from which the bulky garbage has been removed flows into the secondary treatment tank 13. As shown in Figure 3, this rainwater secondary treatment tank 1
Rainwater flows into the sewer pipe 19 via the second drain pipe 15 and does not enter the rainwater basin 12 until the water level in the drain pipe 14 reaches the upper end of the overflow drain pipe 14. Therefore, since the initial rainwater with a large pollution load does not directly flow into the rainwater basin 12, the infiltration part 21 at the bottom of the rainwater basin 12, the rainwater infiltration pipe 20, and the surrounding infiltration part 21 are not clogged. When the amount of rainfall increases, secondary treatment tank 1 is removed as shown in Figure 4.
The water level in 3 has risen and the overflow drain pipe 1
Rainwater is discharged into the rainwater basin 12 from the infiltration part 2.
Infiltrated by 1. However, the pollution load of rainwater at this time has become extremely small, so the suspended solids concentration (SS concentration) in the seepage water is 500mg/ to 2000mg/1.
However, after that, it will be less than 200mg/.

According to this embodiment, bulky waste is removed from the primary treatment tank 16.
Initial rainwater with a large pollution load and a small inflow is collected by the second drain pipe 15 and drains into the sewer pipe 19.
Since the water is discharged into the rainwater basin, it does not directly flow into the seepage section 21 provided at the bottom of the rainwater basin and around the rainwater seepage pipe 20, so that clogging can be prevented and the life of the seepage section 21 can be extended. Can be done. Moreover, rainwater in the later stages when the amount of rainwater is large and the pollution load is low is directly infiltrated into the infiltration part 21, but since the pollution load is small, the occurrence of clogging can be minimized. Furthermore, since the miscellaneous matter processing device 17 is removably provided directly under the upper lid 18, it can be easily removed and cleaned, and can be easily cleaned or replaced.

In the above embodiment, the rainwater infiltration pipe 20 is provided in the rainwater basin 12, and the rainwater infiltration pipe 20 is provided at the bottom of the rainwater basin 12.
Although the case where the infiltration part 21 is provided on the outer periphery of the rainwater catchment 12 has been described, even if there is no rainwater infiltration pipe 20 as shown in FIG. 6 or the bottom of the rainwater catchment 12 is blocked as shown in FIG. It has similar effects.

[Effect of idea]

As described above, according to the present invention, there is a primary treatment tank for capturing bulky waste at the bottom of the upper lid of the rainwater basin, and a first drain pipe for overflow and a second drain pipe for draining to the sewer pipe at the bottom. Since a secondary treatment tank is provided, rainwater can be drained while reliably removing impurities and preventing clogging of the infiltration section. Furthermore, since this dirt removal device is installed directly under the top cover of the rainwater catchment, it can be easily installed and removed for cleaning or replacement.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the rainwater basin miscellaneous removal device according to the present invention, Fig. 2 is a vertical sectional view of Fig. 1, and Figs. 3 and 4 are miscellaneous objects according to the present embodiment. Figure 5 is a longitudinal cross-sectional view showing the state in which the removal device is installed in the rainwater basin during early rainfall and late rainfall, respectively. Figure 5 is a graph showing temporal changes in rainwater inflow and pollution load.
7 and 7 are longitudinal sectional views showing other embodiments of the present invention, respectively, and FIGS. 8 and 9 are longitudinal sectional views showing conventional debris removal devices for rainwater basins, respectively. 12...Rainwater basin, 13...Secondary treatment tank, 13a
...Bottom surface, 14...First drain pipe, 15...Second
Drainage pipe, 16...Primary treatment tank, 17...Miscellaneous waste processing device, 18...Top lid, 19...Sewer pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] A first drain pipe for overflow that is removably attached to the lower part of the top cover of the rainwater basin and projects inside from the bottom surface, and a first drain pipe for overflow that is connected to the bottom surface and can drain water to a sewer pipe. a secondary treatment tank each having a second drainage pipe; and a primary treatment tank with water permeability that is removably attached to the upper part of the secondary treatment tank. Miscellaneous removal device.