JPS6141820Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a filter for a rainwater infiltration device that efficiently purifies large amounts of rainwater that falls on wide open areas such as roads and parks, and allows the filter to permeate into the ground.

In recent years, there has been a great deal of damage caused by the flooding of rivers during heavy rains. To combat this, rainwater storage facilities and infiltration devices have been devised and implemented.

However, in the case of conventional rainwater infiltration devices, the inflow of dirt and filth into the rainwater infiltration devices causes
The problem is that the permeation layer in the device is severely clogged and the permeability is reduced.

The purpose of the present invention is to improve the defects of such a rainwater infiltration device and to efficiently purify and infiltrate rainwater.

The purpose of the present invention is to install a cylindrical filter inside the rainwater guide cylinder and form a passage between the guide cylinder and the cylindrical filter, so that rainwater flows into the passage. The present invention provides a filter for a rainwater infiltration device that is capable of efficiently purifying a large amount of rainwater by increasing the amount of rainwater that permeates through a permeation surface having a sufficient area formed by the outer peripheral side surface of a cylindrical filter. be.

Another object of the present invention is that by providing an outlet for rainwater through a filtration part on the lower side of the cylindrical filter provided in the guide outer cylinder, inflowing rainwater flows through the cylindrical filter. The filtration part installed at the bottom of the cylindrical filter ensures double filtration of rainwater. The purpose of the present invention is to provide a filter for a rainwater infiltration device that can prevent deterioration of the filtration part and withstand long-term use.

That is, in the present invention, a cylindrical filter is housed in a guide outer cylinder, a water passage is formed between the guide outer cylinder and the cylindrical filter, and an outlet is formed on the lower side of the cylindrical filter through a filtration part. The gist of this invention is the structure of a filter for a rainwater infiltration device, which is characterized by being provided with a filter.

Next, the rainwater infiltration device with a filter of the present invention will be explained according to the illustrated embodiment. 1 is a rainwater basin, and the water is collected by a side gutter 3 of a road 2 or a park path. It is used to collect rainwater, etc. Rainwater collected in this rainwater basin 1 is normally discharged into a river via a sewer pipe 4. In this case, the existing rainwater basin 1 is used.

Reference numeral 5 denotes an infiltration basin, and rainwater collected in the rainwater basin 1 and above a certain water level flows into this infiltration basin 5 through a connecting pipe 6. This infiltration chamber 5 is made up of a sedimentation filter 7, a sedimentation layer 8, a crushed stone layer 9, and a sand layer 10. Rainwater flowing into the infiltration chamber 5 passes through the sedimentation filter 7 to remove soil, dirt, etc. , settles through a sediment layer 8, passes through a sandstone layer 9 and a sand layer 10, is purified, and permeates underground.

The sediment filter 7 is a mesh-like basket filled with filter material, and if necessary, the outside of the filter may be covered with linen cloth, etc., and the upper outer periphery of the mesh-like cage is covered with packing made of soft rubber or the like. A material 11 is provided, which adheres closely to the inner wall of the permeation chamber 5 to prevent rainwater from leaking, and also allows the sediment filter 7 to be taken out from the permeation chamber 5 to replace the filter material filled in the mesh basket. is facilitated. The precipitate layer 8 is made of water-permeable sponge material and is replaceable.

12 is an infiltration well, and overflow of rainwater that cannot be treated by the infiltration basin 5 flows into this infiltration well through a connecting pipe 13. There is a permeation pipe 14 on the lower side of the permeation layer well 12, and a filter 15 is suspended from the inside part. Rainwater flowing in from the infiltration pipe 5 is efficiently purified by the filter 15, and the rainwater flows into the infiltration pipe 1.
4 into the permeation layer 16. A loam layer, a sand layer, a gravel layer, etc. are selected as the permeation layer 16 through which rainwater permeates, and when there is no suitable permeation layer, a crushed stone layer is artificially formed and used.

The connecting pipe 6 that connects the rainwater basin 1 and the infiltration basin 5, and the connecting pipe 13 that connects the infiltration basin 5 and the infiltration well 12 are provided with an opposite slope to the flow direction of rainwater, and are detachable. Connecting pipe filters 17 are attached to each pipe to prevent the inflow of earth and sand. Further, as the connecting pipe filter 17, one having a structure in which pine material or the like is supported by a net in a sandwich-like structure is used.

The filter 15 is suspended from an upper cover 19 into the infiltration well 12 by a wire rope 18 and is supported so as to be replaceable. The structure of this filter 15 comprises a guide outer cylinder 20, a filter cover 21, a cylindrical filter 22, and a filtering section 23. The guide outer cylinder 20 has the filter cover 21 welded to the upper part or molded integrally with it, and the filtering section 23 is detachably attached to the lower part by means of bolts 24, etc.
The filter cover 21 and the filtering section 2 are located inside the filter.
3, a cylindrical filter 22 is provided between the outer guide tube 20 and the cylindrical filter 22. The filter cover 20 is provided with a rainwater inlet hole 25, which opens toward a water passage 26 formed between the outer guide tube 20 and the cylindrical filter 22. The cylindrical filter 22 is constructed by layering a filter material made of nonwoven fabric or the like on a net. The filtration section 23 has sponge layers 27, 27 on the top and bottom, an activated carbon layer 28 and an ion exchange resin layer 29 laminated therebetween, and a number of outlets 30 are drilled at the bottom. 31 is a filter seal, which is made of soft rubber or the like and is provided on the outer peripheral edge of the upper part of the outer guide tube 20 to prevent water leakage.

The rainwater flowing into the seepage well 12 is filtered through the filter 15.
The rainwater flows into the water passage 26 from the rainwater inflow hole 25 opened in the filter lid 21 of the rainwater. Sediment in the rainwater that has entered the water passage 26 and sand, silt, garbage, etc. that are removed by the cylindrical filter 22 settle in the mud basin 32. In this way, rainwater is filtered through the cylindrical filter 22.
Sand, silt, clay, etc. are removed by this process, and permeate into the cylindrical filter 22 and reach the filtration section 23. This rainwater is further filtered by the sponge layers 27, 27 in the filtration section 23, organic substances such as oil are removed by the activated carbon 28, and harmful ions such as heavy metals are removed by the ion exchange resin 29. Highly purified rainwater flows out from the outlet 30 and permeates into the underground permeation layer 16 through the permeation pipe 14. In addition, the sponge layers 27, 27 provided above and below serve as filter media, and also serve as activated carbon 28 and ion exchange resin 2.
9 and also helps to prevent it from drying out.

As described above, according to the present invention, the cylindrical filter 22 is installed inside the rainwater guide outer cylinder 20, and the water passage 26 is provided between the guide outer cylinder 20 and the cylindrical filter 22.
By forming this, the rainwater flowing into the water passage 26 increases the amount of rainwater that permeates through the permeation surface, which has a sufficient area formed by the outer peripheral side of the cylindrical filter 22, and efficiently handles a large amount of rainwater. It has the practical benefit of being able to purify it well.

Further, according to the present invention, a filtration part 23 is provided at the lower side of the cylindrical filter 22 provided inside the guide outer cylinder 20.
By providing the rainwater outlet 30 through the
The inflowing rainwater is double filtered by the cylindrical filter 22 and the filtration part 23 provided on the lower side of the cylindrical filter 22, so that the rainwater is reliably purified. Since the rainwater permeates through the cylindrical filter 22 and removes sand, silt, and clay, the filtration part 23 is not clogged and its deterioration is prevented, allowing for long-term use. It has practical benefits that can be endured.

Furthermore, the present invention has practical benefits that can be applied not only to rainwater infiltration wells but also to rainwater infiltration devices in general.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Figure 1 is a vertical cross-sectional view of a rainwater basin, a seepage basin, and a seepage well connected together, and Figure 2 is a longitudinal cross-section of a special filter hanging from the seepage well. The top view and FIG. 3 are plan views. The symbols in the figure are explained as follows. 1
is for rainwater, 2 is for roads, 3 is for gutters, 4 is for sewage pipes,
5 is infiltration, 6 is a connecting pipe, 7 is a sediment filter, 8 is a sediment layer, 9 is a crushed stone layer, 10 is a sand layer, 11
is packing material, 12 is penetration well, 13 is connecting pipe,
14 is a permeation tube, 15 is a filter, 16 is a permeation layer, 17 is a connecting pipe filter, 18 is a wire rope, 19 is an upper lid, 20 is a guide outer cylinder, 21 is a filter lid, 22 is a cylindrical filter, 23 is a filtration part , 24 is a bolt, 25 is a rainwater inflow hole, 26 is a water passage, 27 is a sponge layer, 28 is an activated carbon layer, 29
is an ion exchange resin layer, 30 is an outlet, and 31 is a filter seal.

Claims (1)

[Scope of utility model registration request] A cylindrical filter is installed inside the guide outer cylinder to form a water passage between the guide outer cylinder and the cylindrical filter, and an outlet is provided at the lower side of the cylindrical filter via a filtration part. A filter for rainwater infiltration equipment.