JPS6239166Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a filter suitable for use in a rainwater underground infiltration device.

Recently, rainwater underground infiltration devices have been proposed in order to prevent urban flood damage caused by rainwater and to prevent a drop in groundwater level. This rainwater underground infiltration device guides rainwater introduced into an underground rainwater basin from, for example, a road gutter to a rainwater infiltration part such as a seepage pipe covered by an underground infiltration layer, and directs this rainwater through the underground infiltration layer. It is possible to penetrate and diffuse into the soil.

Here, the rainwater that flows into the underground rainwater basin from the ground surface contains suspended substances such as wood chips and vinyl that are difficult to capture by mud puddles in the rainwater basin, and these suspended substances permeate. There is a risk of clogging pipes, etc. In addition, rainwater may contain impurities that have a negative impact on living organisms, such as acids such as hydrochloric acid, bacteria such as Escherichia coli, and heavy metals. , there is a risk of contaminating groundwater.

Therefore, in order to avoid the above-mentioned suspended solids and impurities contained in rainwater from flowing into the underground percolation layer, it is possible to place a filter in the water conduit from the rainwater basin to the rainwater permeation area. .

This invention effectively utilizes the entire filtration material loaded in the filter, stably removes suspended solids and impurities from rainwater over a relatively long period of time, and ensures proper underground penetration of rainwater. The purpose is to provide a filter that can be secured.

In order to achieve the above object, the present invention provides a filter which is disposed in the water conduit 14 that guides rainwater from the rainwater basin 13 to the rainwater infiltration part 16, and which is provided with a filter tank part 30A and a mud basin part 30B in the vertical direction. 30, an inner cylindrical portion 31 defining a rainwater introduction space 33 and having a rainwater inlet 34 on the peripheral wall;
A filter tank part 30A is formed by an outer cylindrical part 32 which defines a filtration space 36 for accommodating the filter media 35A, 35B between them, and has an outlet 37 for filtered rainwater on the peripheral wall. A rainwater introduction space 33 defined by an inner cylinder part 31 is communicated with a mud basin part 30B.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a rainwater underground infiltration device to which an embodiment of the present invention is applied, in which a road gutter 12 is installed on the ground surface 11, and a rainwater basin 13 is arranged below the gutter 12. A seepage pipe 15 constituting a rainwater infiltration section is connected to the rainwater basin 13 via a water conduit 14 serving as a water conduit in the present invention. The permeation pipe 15 is covered by an underground permeation layer 16 .

A lid 19 having a through hole 18 opening into the side gutter 12 is attached to the upper opening 17 of the rainwater basin 13. The bottom of the rainwater basin 13 is designated as a mud basin 20.
A drain port 21 is formed in the side wall. A garbage removal inlet filter 22 is removably provided in the upper opening 17 of the rainwater basin 13, and a garbage removal drain filter 23 is provided in the drain port 21.

The water conveyance pipe 14 includes a water intake pipe 24 and a filter storage pipe 25.
It is a vertical pipe having a water intake port 2 of the water intake pipe 24.
6 is connected to a drain port 21 of a rainwater basin 13. The upper end of the water conduit 14 opens to the ground surface 11, and the opening 27 can be closed with a lid 28.

Here, in the above rainwater underground infiltration device, the filter housing pipe 25 of the water conduit 14 is equipped with a filter 30 as shown in FIG.

As described later, the filter 30 is provided with a filter tank section 30A and a mud basin section 30B in its longitudinal direction.

The filter tank part 30A of the filter 30 has an inner cylinder part 31 and an outer cylinder part 32 that are arranged substantially coaxially. The inner cylindrical portion 31 defines an introduction space 33 that communicates with the water pipe 14, and has a rainwater inlet 34 on the peripheral wall. Further, the outer cylinder part 32 has a filter space 36 between it and the inner cylinder part 31 that accommodates, for example, a coarse filter material 35A and a fine filter material 35B in a stacked state.
and a filtered rainwater outlet 3
7 on the surrounding wall. In addition, the filter storage pipe 25
A sufficient gap is formed between the inner surface of the tube and the outer cylindrical portion 32 to allow filtered rainwater to flow smoothly.

Here, the inner cylinder part 31 and the filter media 35A, 35
B is of a cartridge type shown in FIGS. 3 and 4, and is detachably attached to the inside of the outer cylindrical portion 32. That is, flanges 38 and 39 are formed at both ends of the inner cylinder part 31, and plate-shaped respective parts as shown in FIG. The filter media 35A, 35B are wound in a layered manner and can be fixedly held by respective locking tools 40. Note that a ring member 42 having a handle 41 is fixed to the upper part of the flange part 38 of the inner cylinder part 31, and a seal member 43 that is in close contact with the inner surface of the outer cylinder part 32 is fixed.
Further, the inner surface of the lower end side of the outer cylinder portion 32 includes an inner cylinder portion 3.
An engagement ring member 44 that can support one flange portion 39 is fixed.

Furthermore, the mud reservoir part 30B is provided at the lower part of the filter tank part 30A of the filter 30 as described above, and the mud reservoir part 30B is a holeless cylinder formed by further extending the lower end of the outer cylinder part 32. The section 45 and a bottom plate 46 coupled to the lower end of the cylindrical section 45 define a mud storage space 47 with which the introduction space 33 communicates.

The filter 30 can be suspended from the ground surface into the water pipe 14 by connecting a hanging wire 49 attached to the upper end of the outer cylinder part 32 to a string 48 connected to the lid 28. It is said to be removable. A flange portion 50 is formed at the upper end of the outer cylinder portion 32 of the filter 30.
1, it can be held in the filter housing tube 25.

Next, the operation of the above embodiment will be explained.

The rainwater flowing into the rainwater basin 13 from the side gutter 12 is
Garbage and the like are removed by the inlet filter 22 and collected in the rainwater basin 13, and then flowed from the drain port 21 to the water conduit 14.
overflowing to. At this time, the dust and the like that were not removed by the inlet filter 22 are removed by the drain filter 23. Further, the sediment is deposited in the mud basin 20 of the rainwater 13. Rainwater flowing into the water pipe 14 enters the filter 30.

The muddy substances in the rainwater entering the filter 30 flow into the mud basin space 47 of the mud basin part 30B through the introduction space 33, and are deposited therein.

On the other hand, rainwater entering the filter 30 flows into the filter tank section 30A.
After flowing into the introduction space 33 of leaks into

Here, in the above embodiment, the filter tank section 30A
A cylindrical filtration space 36 that is long in the axial direction is formed between the inner cylinder part 31 and the outer cylinder part 32. Therefore, in the initial stage of use of the filter tank section 30A, rainwater flowing into the introduction space 33 flows from the inlet 34 located at a lower level of the inner cylinder section 31 to the filtration space 36.
and is filtered through a filtration path as shown by A in FIG. According to the progress of the above-mentioned initial stage, the filtering material 35A located below inside the filtering space 36,
If 35B becomes clogged, rainwater will flow to B in Figure 2.
In the upper filtration path as shown in , the water is filtered through filter media 35A and 35B that are not yet clogged. In this way, the filter media 35A, 35 located lower inside the filter space 36
As B gradually becomes clogged, A to A in Fig. 2 become clogged.
As shown in C, the filtration path moves upward in sequence, and stable filtration is always performed using fresh and active filter media 35A and 35B.

In addition, if the filter media 35A, 35B of the filter tank section 30A become clogged, after pulling the filter 30 to the ground surface, remove the inner cylinder part 31, around which the filter media 35A, 35B are wound, from the outer cylinder. By taking them out from the section 32, it becomes possible to quickly and easily replace the filter media 35A, 35B.

That is, according to the filter 30, muddy substances in rainwater can be captured by the mud basin section 30B, and the burden on the filter tank section 30A can be reduced. Further, the clogging of the filter media 35A, 35B in the filter tank section 30A gradually moves from the lower level to the upper level, and rainwater always passes through the filtration path at the higher level that is not clogged. Therefore, the filter medium 35
It is possible to effectively utilize the entirety of A and 35B to stably adsorb and remove suspended solids and impurities dissolved in rainwater over a relatively long period of time, ensuring proper rainwater permeation underground. Become.

As described above, the present invention is a filter 30 arranged in a water guide pipe 14 that guides rainwater from a rainwater inlet 13 to a rainwater infiltration section 16, and has a filter tank section 30A and a mud pool section 30B arranged vertically.
The filter tank section 30A is formed by an inner cylinder section 31 having a rainwater inlet 34 in the peripheral wall and an outer cylinder section 32 having a filtering space 36 for accommodating filtering materials 35A, 35B between the inner cylinder section 31 and the outer cylinder section 32 having a filtered rainwater outlet 37 in the peripheral wall, and the rainwater introduction space 33 defined by the inner cylinder section 31 is connected to the mud reservoir section 30B.
By effectively utilizing the entire system, it is possible to stably remove suspended solids and impurities in rainwater over a relatively long period of time and ensure proper underground infiltration of rainwater.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a rainwater underground infiltration device to which an embodiment of the present invention is applied, Fig. 2 is a sectional view showing a filter according to the same embodiment, and Fig. 3 is an inner cylinder in the filter. FIG. 4 is a sectional view taken along the line - in FIG. 3, and FIG. 5 is a perspective view showing an example of the filter material used in the filter. 13...Rainwater, 14...Water pipe, 15...
Penetration pipe, 16... Underground penetration layer, 30... Filter,
30A...Filter tank part, 30B...Mud basin part, 31...
Inner cylinder part, 32...Outer cylinder part, 33...Introduction space, 3
4...Inflow port, 35A, 35B...Filtering material, 36
...filtration space, 37...outlet.

Claims (1)

[Scope of utility model registration request] It is a filter that is placed in a water conduit that guides rainwater from the rainwater collection to the rainwater infiltration section, and has a filter tank section and a mud basin section installed in the vertical direction. The inner cylinder part has an inlet in the peripheral wall, and the outer cylinder part defines a filtration space for accommodating a filter material between the inner cylinder part and has an outlet in the peripheral wall for filtered rainwater. A filter that forms a tank part and communicates a rainwater introduction space defined by the inner cylinder part with a mud basin part.