JPH0133197Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention infiltrates and diffuses various wastewater such as sewage into the soil and utilizes the action of microorganisms in the soil, adsorption to the soil, filtration action, etc. The present invention relates to a wastewater purification structure that purifies wastewater.

(Prior art) Conventionally, thin wings made of a non-woven filter are formed protruding from the side surface of a cylindrical body made of a non-woven filter, and an impermeable sheet is attached to the bottom of the cylindrical body to prevent water from entering the soil. The drainage water supplied to the inside of the cylindrical body buried with the axis of the pipe horizontally flows into the so-called "water path" (the soil below the bottom of the cylindrical body forms a groove due to concentrated infiltration of the drainage water in a very localized area). Sewage purification structures are known to prevent sewage from flowing directly into the underground water veins without being purified in the soil due to the phenomenon of soil erosion.
56-48230).

This structure is capable of effectively infiltrating wastewater into the soil to perform wastewater treatment.

[Problem that the invention attempts to solve]

By the way, since this conventional structure uses a cylindrical body and wing pieces made of a non-woven filter, it is easily clogged with sludge-like scum, and furthermore, the upper non-woven fabric is constantly infiltrated with waste water. Over time, the surrounding soil becomes anaerobic, and the water permeability of the soil decreases significantly due to the mucus secretion of anaerobic microorganisms.In a short period of time, the siphon effect of the nonwoven filter, that is, the drainage There was a problem in that the ability to absorb water, evapotranspiration, infiltration, and infiltration into the soil was reduced, making it impossible to perform satisfactory drainage treatment.Furthermore, when this structure was buried in the soil, water permeability was reduced. Since the sheet does not have the function of supporting the cylindrical body, the ground at the buried part must be sufficiently tamped to maintain the horizontal direction of the pipe axis of the structure, and this tamping work requires a great deal of labor and In some cases, work cannot be carried out, and on top of that, the ground is compacted, which worsens the permeability of wastewater and reduces wastewater treatment capacity. Furthermore, even if the ground is compacted with great care, it is difficult to bury the structure horizontally, and if the structure is not kept level, sewage will leak into the deeply buried parts of the structure. There is a problem that the drainage load is concentrated and not applied evenly in the pipe axis direction of the structure. Furthermore, even if a structure is buried horizontally, it can easily deform if the ground subsides or if a heavy object such as a car passes over the ground and loads are applied to the structure. This can cause problems such as the leveling of the structure being disrupted, and connections in the structure becoming disconnected, resulting in drainage leaking from those parts.

The purpose of the present invention is to solve the problems of conventional wastewater purification structures, to prevent clogging caused by sludge-like scum and anaerobic microorganisms, to have a long service life, and to bury and construct the structure horizontally. It is an object of the present invention to provide a wastewater purification structure that is easy to construct, is difficult to deform due to ground subsidence after burial, loads, etc., and is also easy to manufacture and transport. .

[Means for solving problems]

That is, the present invention includes a drainage permeation pipe made of a permeable tubular body buried in soil with the pipe axis direction horizontal, and a substantially lower outer peripheral surface of the drainage permeation pipe extending in the pipe axis direction is covered, and the drainage permeation pipe is and a drainage permeation pipe burying stand made of an impermeable rigid body having a permeation pipe placement part, the burying stand being divided into a plurality of partial burying stands, and each partial burying stand being connected to each other by a fitting structure. The present invention provides a wastewater purification structure characterized by:

[Effect]

By adopting the above configuration, the present invention forms a burial platform by fitting and connecting a plurality of partial burial platforms to a predetermined length with the connection direction horizontal on the dug soil surface, and this burial platform A wastewater purification structure is assembled and formed by placing a wastewater infiltration pipe on the mounting part with the pipe axis direction horizontal, and by covering the wastewater purification structure with soil and allowing the wastewater to flow into the wastewater infiltration pipe, It is difficult to get clogged with sludge-like scum and anaerobic microorganisms, has a long service life, and is easy to bury and construct structures horizontally, and is also resistant to ground subsidence and load loading after burial. At the same time, it is difficult to deform and is easy to manufacture and transport.

〔Example〕

Hereinafter, the water permeation purification structure of the present invention will be explained based on the drawings.

Fig. 1 is a cross-sectional view of a wastewater purification structure according to an embodiment of the present invention, Fig. 2 is a perspective view of a wastewater infiltration pipe used in the wastewater purification structure of this embodiment, and Fig. 3 is a cross-sectional view of a wastewater purification structure according to an embodiment of the present invention. FIG. 4 is a perspective view showing a method of assembling a buried stand used in a wastewater purification structure, and a plan view showing a usage state of this embodiment.

As shown in FIG. 1, the wastewater purification structure A of this embodiment includes a wastewater infiltration pipe 10, a buried stand 20, and a covering sheet 30.

The drainage infiltration pipe 10 is a pipe made of a permeable tubular body that is buried in the soil with its axial direction horizontal in order to infiltrate the drainage water into the soil.As shown in FIG. Water holes 12 are drilled at regular intervals over the entire length.

The drainage permeation pipe 10 is a pipe made of synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, ABS resin, etc. Water-permeable materials such as those made by assembling fibers into a tube with a string-making machine to create a tube with a braid-like wall surface, and those made by melting and discharging synthetic resin in a linear manner and fusing it into a tube shape to create a porous wall tube. Any pipe can be used.

Further, the cross-sectional shape of the drainage infiltration pipe 10 is most preferably circular in order to prevent deformation under load as much as possible, but it may be in any shape as necessary, such as polygonal or elliptical. be able to.

In addition, the drainage permeation pipe 10 of this embodiment is constructed by sequentially connecting the short partial drainage permeation pipes 13 with a tape (not shown).
Although the drainage permeation pipe 10 is formed by being connected with each other, for example, it may be a single elongated drainage permeation pipe 10 having a required length.

The embedding base 20 is a member made of an impermeable rigid body that covers the substantially lower outer circumferential surface 14 of the drainage permeation pipe 10 extending in the pipe axial direction, and has a mounting portion 21 for the drainage permeation pipe 10, as shown in FIG. As shown, it is partially formed by a plurality of partial burial stands 22, and each partial burial stand 22
are connected to each other by a fitting structure 23.

The burial table 20 is a styrofoam table with a trapezoidal shape in which the lower base is longer than the upper base when viewed in cross section, and the mounting part 21 of the drainage permeation pipe 10 is located almost at the top of the burial table 20. A notch is formed in the entire area in the shape of a gutter, passing through both end faces in the connection direction and parallel to the bottom surface. In addition, a wedge-shaped male fitting part 231 constituting the fitting structure 23 is formed protrudingly at one lower end in the connecting direction of each partial embedding base 22, while at the other lower end in the connecting direction. A female fitting part 232, which is fitted into the wedge-shaped male fitting part 231, is formed in a notch.

Further, the covering sheet 30 is a water-permeable sheet for preventing soil and plant roots from entering the drainage infiltration pipe 10 covered on the outer surface of the drainage purification structure A, and in this embodiment, a nonwoven fabric is used. Although this material is used, sheets made of other materials such as net or knitted fabric may also be used.

Thus, according to the present invention, for example, about 40
As shown in Figure 3, a partial burial platform 22 of a predetermined length is installed with the connection direction horizontal on the soil surface that has been dug down.
The male fitting part 231 and the female fitting part 232 of
They are fitted and connected to form a burial table 20 as shown in FIG. The surface 14 is covered and placed, and one end of this wastewater infiltration pipe 10 is communicated with a wastewater outflow pipe 41 connected to a wastewater storage tank 40, while the other end is stopped with a stopper 50, and further The outer surface of the drainage infiltration pipe 10 and the burial platform 20 is covered with a sheet 3
0 to assemble and form the wastewater purification structure A. In this way, by horizontally arranging the drainage infiltration pipe 10 on the dug soil surface via the burial platform 20,
There is no need to compact the soil in the buried part of the wastewater purification structure A, and since the burial base 20 is divided into parts 22 that are fitted and connected, the soil of the wastewater purification structure A can be compacted. Easy to apply to surfaces.

Further, since the lower outer circumferential surface 14 of the drainage infiltration pipe 10 is covered with the buried stand 20, the drainage supplied into the drainage infiltration pipe 10 is purified in the soil by forming a so-called "water path". This prevents the wastewater from flowing into the groundwater vein directly under the wastewater purification structure A.

Thereafter, the thus formed wastewater purification structure A is covered with soil, and the wastewater is caused to flow from the wastewater storage tank 40 into the wastewater infiltration pipe 10 via the wastewater outflow pipe 41. In addition, it is preferable that the amount of this inflowing drainage water be such that an air layer is formed in the upper part of the drainage permeation pipe 10 in order to leave room for intermittent drainage.

Next, the wastewater flowing into the wastewater permeation pipe 10 gradually passes through the cover sheet 30 from the water passage holes 12, infiltrates and diffuses into the soil, and is purified by microorganisms in the soil.

In other words, the wastewater infiltrates and infiltrates the soil close to the ground surface while breathing in air, allowing aerobic microorganisms to proliferate, decomposing organic matter in the wastewater, and purifying it. In this way, the wastewater flowing into the wastewater infiltration pipe 10 is infiltrated and diffused into the soil through the water passage holes 12, so that clogging by sludge-like scum and anaerobic microorganisms is less likely to occur, and wastewater infiltration is prevented. The durability of the tube 10 is improved.

The purified wastewater may be allowed to permeate underground as is in an open system, or may be collected in a collection pipe and reused in a closed system.

[Effect of idea]

The wastewater purification structure of the present invention does not use a cylindrical body or wing pieces made of a non-woven filter, but uses a wastewater permeation pipe 10 made of a water-permeable tubular body, so that it can perform soil filtration in a wide area of the surrounding soil. As a result of this, aerobic microorganism treatment is performed, clogging with sludge-like scum hardly occurs, and the service life is greatly extended.

In addition, in the conventional wastewater purification structure using a cylindrical body made of a non-woven filter and wing pieces, approximately 6
With continuous use, clogging with sludge-like scum progresses, making it impossible to perform normal wastewater purification functions, but according to the wastewater purification structure of the present invention,
Even after more than one year has passed since the start of use, there is no sign of the soil becoming anaerobic, there is almost no clogging of the soil, and normal wastewater purification can be carried out.

Furthermore, in the wastewater purification structure of the present invention, the buried stand 20 is attached to the outer peripheral surface of the lower part of the wastewater infiltration pipe 10, so there is no need to compact the ground.
By simply laying the embedding platform 20 and fitting the drainage infiltration pipe 10 thereon, a sufficiently satisfactory horizontal state can be obtained, and the work of burying the structure in the soil is significantly simplified. Furthermore, since it is not necessary to compact the ground, the permeability of wastewater is not inhibited, and the wastewater purification ability is not reduced.

In addition, since a sufficiently horizontal state can be easily obtained,
The drainage load can be applied uniformly along the length of the structure, and drainage will not be discharged into the soil from only a portion of the structure.

Furthermore, since the drainage infiltration pipe 10 is reinforced by the burial platform 20, even if the ground subsides after the structure is buried or a load is applied to the structure due to passing cars, etc. There are no problems such as the structure deforming and losing its horizontal state, or the connection parts of the structure coming off and drainage leaking from that part.

Furthermore, when wastewater is supplied into the wastewater infiltration pipe 10, if an air layer is formed in the upper part of the pipe 10, the amount of water discharged can be changed considerably due to the existence of the air layer, thereby preventing intermittent drainage. Even if you go there, you can fully cope with it. Furthermore, since the burial platform 20 is formed in sections, it is easy to manufacture and transport, and its construction is extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a wastewater purification structure according to an embodiment of the present invention, Fig. 2 is a perspective view of a wastewater infiltration pipe used in the wastewater purification structure of this embodiment, and Fig. 3 is a cross-sectional view of a wastewater purification structure according to an embodiment of the present invention. FIG. 4 is a perspective view showing a method of assembling a buried stand used in a wastewater purification structure, and a plan view showing a usage state of this embodiment. A; Drainage purification structure, 10; Drainage infiltration pipe, 1
4; Lower outer circumferential surface, 20; Buried stand, 21; Placement part,
22; Partially buried stand; 23; Fitting structure.

Claims (1)

[Scope of utility model registration request] A drainage infiltration pipe made of a permeable tubular body buried in soil with the pipe axis direction horizontal, and a mounting part for the drainage infiltration pipe that covers substantially the lower outer peripheral surface of the drainage infiltration pipe in the pipe axis direction. and a burying stand for a drainage seepage pipe made of an impermeable rigid body having a structure, the burying stand being divided into a plurality of partial burying stands, and each partial burying stand being connected to each other by a fitting structure. wastewater purification structure.