JPH04238925A - Drain purifying reduction side channel and cartridge therefor - Google Patents

Abstract

PURPOSE:To save the cost necessary for drain treatment by purifying rainwater and drain to reduce then underground sections, and by preventing the lowering of an underground water level, the flood of a river due to heavy rain, or the like from being generated, as a result. CONSTITUTION:Through the bottom of a concrete U-shaped channel body 1, an opening section 5 is bored to be set, and an opening section interior is filled up with filtering material 9, and a network-shaped object 10 covering the filtering material 9 is removably fixed on the opening section. Otherwise, a cartridge is used as the filtering material. Besides, when the water level of the drain channel is increased, then the side surface of the U-shaped channel body is provided with a penetration hole, and a pipe is connected to the penetration hole, and the pipe is induced to a position separated from a side channel, and rainwater is directly infiltrated into ground.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a wastewater purification gutter that filters wastewater from the bottom of the roadside gutter and returns it underground to maintain a high groundwater level and prevent river water from rising during heavy rains. and a cartridge used therefor.

0002

[Background Art] Recently, in urban areas, buildings are densely packed,
Paving roads with concrete or asphalt has reduced the amount of exposed ground, and even the slightest amount of rainfall causes rainwater to overflow from gutters and cause river flooding, exceeding the allowable drainage capacity.

[0003] On the other hand, covering road surfaces with concrete or asphalt wastefully releases water that should normally permeate underground into rivers, lowering the groundwater level and inhibiting the moisture buffering effect of the topsoil. . Therefore, roadside trees are not always supplied with enough moisture, and their growth is inhibited.

[0004] As a means of allowing rainwater to permeate underground as much as possible, pavements with a large number of minute pores have been partially implemented, but due to problems with strength, they can only be used on sidewalks at best, and the pores are This caused clogging, and there were also problems in terms of durability.

[0005] A method of drilling a hole in the bottom of a U-shaped gutter unit that makes up a side gutter and returning a large amount of water flowing through the gutter underground is as follows:
It could not be put to practical use because the water flow scoured the earth and sand at the bottom of the hole and damaged the gutter itself. Jitsukai 61-765
In Publication No. 46, a trap is provided at the opening of the bottom surface of the side gutter,
A technique for preventing earth and sand from scouring on the lower surface of an opening is disclosed.

[0006]

[Problem to be solved by the invention] However, since water flowing through side gutters is generally more contaminated than rainwater that directly permeates underground, implementing the above technology merely returns the wastewater to the underground. This can cause groundwater contamination. Additionally, drainage water that has been diluted by large amounts of rainwater during heavy rains may be allowed to permeate underground without any problem from the standpoint of groundwater contamination, and it is also thought to be useful in supplying sufficient water to roadside trees, etc. . Therefore, there was a need for a technology that could purify wastewater and return it to the ground in large quantities, and a technology that would allow wastewater to permeate underground only when it is diluted by heavy rain.

[0007]

[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems, and has a structure in which an opening is bored at the bottom of a concrete U-shaped groove unit, a filter medium is filled in the opening, and the filter medium is The present invention is characterized in that a net-like material is detachably fixed to the opening covering the filter, and that the filter medium portion is in the form of a cartridge. Moreover, a through hole is provided in the side surface of the concrete U-shaped gutter unit, a pipe is connected to the through hole, and the pipe is guided to a position away from the side gutter.

The U-shaped groove unit of the present invention is a unit made of concrete and having a U-shaped cross section and used for ordinary grooves. Connect these to construct a gutter. It is also possible to provide a cover over the side gutter as shown in FIG. 1 so that the top of the side gutter can also be used as a passage. The present invention uses intermittently a U-shaped groove unit having a large opening at the bottom. The size of the opening is preferably large enough to maintain the strength of the U-shaped groove unit. The larger the opening, the greater the amount of water that will seep into the ground through this opening.

[0009] In the present invention, a filter material is provided in the opening to filter and purify the wastewater flowing through the side gutter and allow it to permeate underground. Examples of filter media include gravel, activated carbon, charcoal, and nonwoven fiber structures, and these can be used alone or in combination of two or more. A non-woven fiber structure is made by stacking and intertwining fibers such as polypropylene and polyester without the twisting or weaving process.
Although it is a type of nonwoven fabric, its thickness reaches from 1 mm to more than 5 mm, does not corrode, and has great strength and filtration effect. Furthermore, unlike other granular filter media, non-woven fibrous structures do not partially wash away when exposed to running water, and can be placed on top of the filter layer to prevent other granular filter media from being lost. .

[0010] Since various solid substances are mixed in the wastewater, a mesh is placed in order to prevent the filter medium from being damaged by these solid substances. When managing gutters, all you have to do is remove the solid matter on top of this net-like material. The mesh is not damaged by solids in the waste water and has the strength to protect the filter medium on the bottom surface, and is slatted or coarsely meshed with many large holes. Furthermore, since the filter medium becomes clogged when used for a long period of time, it is necessary to replace it at regular intervals. In order to facilitate replacement of the filter media, a removable mesh is used, and the mesh is removed to replace the filter media in the opening. Replacement is even easier if a cartridge as shown in FIG. 5 is used.

There are various means for making the mesh removable. For example, as shown in FIG. 1, a shallow notch is provided surrounding the opening. If the net-like material is placed on this notch, the net-like material will be lower than the bottom surface of the drainage ditch, and there will be less resistance to the flow of the net-like material. However, since there is a risk that the net-like material may be washed away if it is simply placed, the net-like material is detachably fixed to the opening. As a fixing means, a coupling hole is previously drilled on the notch when the U-shaped groove unit is cast. Furthermore, a hole is provided in a part of the mesh that corresponds to this joining hole, and the hole of the mesh and the hole on the notch are aligned and screwed together with a corrosion-resistant screw, or the joining means is inserted into the joining hole on the notch. Known means can be used, such as fixing the protrusion, passing a coupling means through a hole in the mesh, and covering the protruding head with a cap that does not pass through the hole.

[0012] When replacing the filter medium, remove the removable fixing means such as screws and remove the mesh. Next, remove the clogged filter medium and replace it with a new one. In this case, since clogging of the nonwoven fibrous structure in the uppermost layer is particularly significant, only the nonwoven fibrous structure may be replaced. Furthermore, if the filter medium is made into a cartridge type and each cartridge is replaced, the work becomes easier. When a cartridge is used, no particular coupling means is required as long as the cartridge is deeply and tightly fitted into the opening.

[0013] The cartridge is removably attached to the opening, and when installed, it comes into close contact with the opening, and the inside of the case is filled with a filter medium. As a filter medium, the distribution process,
In order to avoid loss of the filter medium during use or construction, it is preferable to provide non-woven fiber structures on both the upper and lower surfaces. Furthermore, if a net is provided at the bottom, it has a reinforcing effect, and if a net is provided at the top, loss of the filter medium due to solid matter during use can be avoided.

[0014] In order to purify the water returned underground as much as possible, it is preferable that the lower surface of the filter layer of the U-shaped groove be made of crushed stone, gravel, earth and sand mixed with charcoal. Since the material of the lower surface of the U-shaped groove cannot be replaced, it is preferable to use a material that has a permanent filtering effect.

On the other hand, when normal wastewater is flowing, filtration is essential for underground return, but in cases such as road drainage ditches or heavy rains, all or most of the wastewater components are rainwater. In this case, it is not only possible to release a large amount of water from the drainage ditch and return it directly underground, but it is also a preferable means for flood prevention. Although it varies depending on the individual drainage ditch, a through-hole is bored in the bottom of the ditch, a side surface at a certain height from the bottom surface, or both, and a pipe is connected to this through-hole and guided to a predetermined position. For example, if there is a street tree on the sidewalk, by guiding it to the vicinity of the roots of the street tree, the exposed soil around the street tree is small, so a large amount of water, which tends to be insufficient even during heavy rain, can be supplied at this time. can do. In addition, if pipes are opened not only in street trees but also in the surrounding area, rainwater can penetrate underground from these areas as well. For this purpose, by providing a through hole at a certain height in the side wall, when the amount of water reaches a certain height, the wastewater can be returned underground without being filtered. By adjusting the position of the through hole depending on the environment and conditions of the U-shaped groove installation site, it is possible to adjust the degree of dilution of the drainage water that allows a large amount of rainwater to permeate underground without being filtered.

According to the present invention, it is also possible to provide a purification and reduction device at the bottom of the U-shaped groove unit, and to provide both of the above devices for directly reducing a large amount of water on the side surface.

[0017]

[Operation] According to the present invention, an opening is provided at the bottom of a concrete U-shaped groove unit, and this opening is filled with a replaceable filter medium. Therefore, the wastewater flowing through the U-shaped groove passes through the filter material from the bottom, is purified, and then permeates underground. Although the rate of return is somewhat reduced due to filtration, the area of the opening at the bottom of the U-shaped groove is quite large, so a large amount of rainwater can be returned underground.As a result, flooding can be prevented.
It helps raise the groundwater level and is easy to replace if the filter material becomes clogged.

[0018]Furthermore, when the water level rises extremely due to heavy rain, etc., a through hole can be provided in the side wall of the U-shaped ditch to directly return the drainage water sufficiently diluted by rainwater to the underground, thereby preventing flooding. can.

[0019]

[Example] Fig. 1 is a perspective view of an embodiment of the present invention before filling with filter media, Fig. 2 is a cross-sectional view of a side gutter, Fig. 3 is an enlarged view of the part where the mesh is attached, and Fig. 4 is a perspective view of the mesh. FIG. 5 shows a cross-sectional view of a cartridge when the cartridge is used as a filter medium.

Reference numeral 1 denotes a U-shaped groove unit, and a step 3 on which a lid 2 is placed is provided at the upper end. An opening 4 was formed in the bottom, and a step-like notch 5 was provided around the upper end. Reference numeral 6 denotes a fixed stake that is fixed to a previously provided coupling hole and has a head 7 protruding.

The opening 4 was filled with fine sand 8 having a diameter of approximately 5 mm, and a nonwoven fiber structure 9 made of polypropylene fiber having a thickness of 4 mm was laid thereon. 10 is a net-like material, and in this example, one having the shape shown in FIG. 4 was used. A slatted material made of high-density polyethylene uniaxially stretched and integrally molded, or a lattice-like material made of biaxially stretched and integrally molded material were used. In FIG. 4, reference numeral 11 indicates a space, and reference numeral 12 indicates a frame, and a hole 13 for fixing to the opening 4 is provided in the surrounding frame 12.

As shown in FIG. 3, the head 7 of the fixed stake 6 previously embedded in the notch 5 was passed through the hole 13 and attached, and the protruding head 7 was covered with a cap 14 and fixed. Therefore, the hole 13 is sized to pass through the head 7 of the fixed stake 6 but not through the cap 14. As shown in FIG.
A semi-permanent filter layer 15 made of crushed stone mixed with charcoal was provided on the lower surface of the filter layer.

[0023] Solids in the waste water flowing in the U-shaped groove accumulate on the mesh and do not damage the filter medium inside. Some of the water passes through the filter layer and percolates underground. Most of the impurities in the waste water were filtered out while passing through the filter media layer. In addition, the wastewater was further purified while passing through the semi-permanent filter layer below the filter layer. Clean and remove solids on the mesh intermittently.

FIG. 5 is a sectional view of the cartridge, in which a case 16 that tightly fits into the opening 4 is filled with a filter medium. A nonwoven fiber structure 9 was used on both the upper and lower surfaces of the filter medium, and fine sand 8 was used in the center. A net 17 was provided at the bottom to increase the strength of the cartridge. 10 is a net-like material that protects the upper surface.

FIG. 6 is a perspective view of a U-shaped groove unit showing another embodiment, and FIG. 7 is a sectional view of the road surface. In this embodiment, a through hole 21 is provided in at least one side wall 20, and a pipe 22 made of vinyl chloride is attached to this through hole 21. 23 is a roadway, and 24 is a sidewalk. 25 is a roadside tree, and 26 is an exposed part of the soil around the roadside tree. The water in the U-shaped groove, which has increased in volume due to heavy rain, is sufficiently diluted with rainwater and is located above the through hole 21.
The water above 1 was guided by the pipe 22, and in the case of this example, was discharged around the roadside trees. As a result, it becomes possible to return a large amount of rainwater underground, and even when heavy rain falls, sufficient moisture can be supplied to roadside trees that are not supplied with sufficient moisture only around the exposed soil portion 26.

In this embodiment, the through hole is provided in the side wall, but the through hole may be provided in the bottom of the U-shaped groove, or it is also possible to provide the through hole in both the bottom and the side wall.

[0027]

[Effects of the Invention] The present invention makes it possible to purify rainwater and wastewater and return it underground.As a result, it is possible to prevent a drop in the groundwater level and the flooding of rivers due to heavy rain, which is necessary for wastewater treatment. Costs can also be reduced.

[Brief explanation of the drawing]

[Figure 1] Perspective view of the U-shaped groove before filling with filter media

[Figure 2] U
Cross-sectional view of the opening of the groove

[Figure 3] Enlarged view of the U-shaped groove where the mesh is attached

[Figure 4] Perspective view of the net-like material

[Figure 5] Cross-sectional view of cartridge

[Fig. 6] Perspective view of a U-shaped groove unit with a through hole in the side wall.

[Figure 7] Cross-sectional view of the road surface

[Explanation of symbols]

1 U-shaped groove unit 2 Lid 4 Opening 5 Notch 6 Fixed pile 7 Head 8 Fine sand 9 Non-woven fiber structure 10　Network 11 Space part 12 Frame part 13 holes 14 Cap 15 Semi-permanent filter layer 16 Cartridge case 17 Net 21 Through hole 22 Pipe 24 Sidewalk 26 Exposed soil area

Claims (6)

[Claims] [Claim 1] An opening is bored in the bottom of the concrete U-shaped groove unit, a filter medium is filled in the opening, and a net-like material is detachably fixed to the opening to cover the filter medium. Wastewater purification and reduction gutters. 2. A net-like material having a shallow notch surrounding the upper surface of the opening, a connecting hole formed around the notch, and a hole having a size that covers the opening and corresponding to the connecting hole. 2. The drainage purification and reduction gutter according to claim 1, wherein the drain purification and reduction gutter is detachably fixed to the upper part of the opening. 3. The drainage purification and reduction gutter according to claim 1 or 2, wherein at least the upper surface of the filter layer is made of a nonwoven fiber structure. 4. A wastewater purification system characterized in that an opening is bored in the bottom of a concrete U-shaped groove unit, a filter medium is filled in the opening, and crushed stone mixed with charcoal is laid on the lower surface of the opening. Reducing gutters. 5. A cartridge having an opening formed in the bottom of a concrete U-shaped groove unit and removably fitting into the opening, the cartridge being filled with a filter medium,
A cartridge for wastewater purification and reduction gutters, characterized in that both the upper and lower surfaces of the filter medium are made of non-woven fiber structures. 6. A wastewater purification system characterized in that a through hole is provided in the side and/or bottom of a concrete U-shaped gutter unit, a pipe is connected to the through hole, and the pipe is guided to a position away from the side gutter. Reducing gutters.