JP4302262B2 - Filter bed and septic tank with built-in filter bed - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter bed and a septic tank incorporating the filter bed.
[0002]
[Prior art]
The filter bed has a side wall, a water passage member that allows water to pass through, and a filter medium that is placed on the water passage member. The filter medium physically removes solids and is built in the septic tank. When it is made to adhere, microorganisms are made to adhere to a filter medium and an anaerobic process or an aerobic process is performed.
[0003]
FIG. 9 is a septic tank, (a) shows a schematic plan perspective view, and (b) shows an AA cross-sectional view of (a). A conventional filter bed will be described with reference to FIG. The septic tank 1 is partitioned by partition plates 4, 5, 6, and 7, and from the side closer to the inlet 24, the precipitation separation tank 8, the anaerobic filter bed tank 2, the aerobic filter bed tank 3, the treated water tank 9, A disinfection tank 10 is sequentially provided. The anaerobic filter bed tank 2 is provided with water flow plates 11 and 12, and a filter medium (not shown) is filled between the water flow plates 11 and 12. The aerobic filter bed tank 3 is provided with water flow plates 13, 14, 15, and the filter medium is filled between the water flow plates 14, 15 and between the water flow plates 13, 15. .
[0004]
Describing the flow of water, the sewage flowing into the sedimentation separation tank 8 from the inlet 24 is solid-liquid separated as the solid content settles, and the liquid portion of the sewage flows into the anaerobic filter bed tank 2. The sewage flowing into the anaerobic filter bed tank 2 is subjected to anaerobic treatment by anaerobic microorganisms attached to the filter medium, and impurities are removed by the filter medium and flow into the aerobic filter bed tank 3. The sewage that has flowed into the aerobic filter bed tank 3 is subjected to an aerobic treatment by aerobic microorganisms adhering to the filter medium, and impurities are removed by the filter medium and flow into the treated water tank 9. The sewage that has flowed into the treated water tank 9 flows into the disinfecting tank 10 after sterilizing sediments, is sterilized, and discharged from the outlet 25 as treated water.
[0005]
FIG. 10 is an enlarged detailed view of the septic tank 1 shown in FIG. The filter bed, which is provided in the anaerobic filter bed tank 2, will be described as an example. The filter bed is filled with a filter medium inside the water flow plates 11 and 12. The installation method of the water flow plates 11 and 12 will be described. A substantially bowl-shaped support body 16 is installed at the bottom of the anaerobic filter bed tank 2, the water flow plate 12 is placed on the support body 16, and The four side ends of the water plate 12, the partition plates 4 and 5, and the side wall (not shown) of the septic tank are fixed with an adhesive and bolts. Next, a filter medium is placed on the water flow plate 12, a fixture 17 is provided on the filter medium, and the water flow plate 11 is fixed to the fixture 17 with a bolt.
[0006]
Installation of the filter bed of the aerobic filter bed tank 3 is performed by installing a substantially bowl-shaped support 18 at the bottom of the aerobic filter bed tank 3 and placing a water flow plate 14 on the support 18. The four side ends of the water flow plate 14 and the partition plates 5 and 6 and the side wall of the septic tank are fixed with an adhesive and bolts. Next, a pipe-like support body 19 and a filter medium are placed on the water flow plate 14, and the water flow plate 15 is installed on the support body 19, and water is passed through the four side ends of the water flow plate 15. Fix in the same manner as the plate 14. Further, a pipe-like support 20 and a filter medium are placed on the water flow plate 15, and the water flow plate 13 is placed on the support 20, and water is passed through the four side ends of the water flow plate 13. While fixing like the board 14, it fixes also to the fixing tool 21 with a volt | bolt. The air diffuser 22 described in the figure is used to supply air for performing aerobic treatment, and the air diffuser 23 is used for backwashing to prevent the filter medium from being blocked. Supply air to be used.
[0007]
[Problems to be solved by the invention]
However, the filter bed has a problem of requiring members such as a large number of supports and fixtures when installing a water flow plate.
[0008]
In addition, since the septic tank is used for a long time after installation, it may be necessary to replenish or replace the filter media during periodic inspection of the filter bed. Remove the bolts and adhesive to replenish or replace the filter media. In addition, removing the fixture, the support, and the water flow plate has been a cumbersome operation.
[0009]
The present invention has been made in view of the above-described problems, and does not require members such as a support and a fixture when installing a water flow plate, and can easily replenish or replace a filter medium. An object is to provide a filter bed and a septic tank incorporating the filter bed.
[0010]
[Means for Solving the Problems]
The present invention relates to the following.
( 1 ) In a filter bed having a side wall that surrounds the four sides, a water passage member installed on the side wall, and a filter medium placed on the water passage member, at least a pair of wall surfaces opposed to the side wall are: Each of the water passages having a horizontally protruding protrusion and a protrusion protruding in the horizontal direction on a wall surface spaced upward from each of the receiving holes, and installed between the protrusion and the protrusion. The member has a notch so that it can be detached from between the receiving seat and the protrusion by moving the water passing member in the horizontal direction, and the water passing member can slide a plurality of water passing members. der Ru filtration floor that was connected to.
( 2 ) The filter bed according to (1) , wherein the water passage member includes a handle.
( 3 ) The filter bed according to (1) or (2) , wherein a plurality of water-permeable members are provided in a vertical direction, and the filter medium is filled between the water-permeable members.
( 4 ) By aligning the notch and the protrusion, the water passage plate is placed on the receiving seat, and when the water passing member is installed between the receiving seat and the protrusion, the water passing member is The filter bed according to any one of (1) to (3) , wherein a height position of the water-permeable member is determined by the water-permeable member coming into contact with the receiving seat after passing through the protrusion .
( 5 ) The filter bed according to any one of (1) to (4) , wherein the side wall is a partition wall provided in the side wall of the septic tank or in the septic tank and partitioning the inside of the septic tank into a plurality of rooms.
( 6 ) A septic tank incorporating the filter bed according to any one of (1) to (5) .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The water passage member used in the present invention is not particularly limited as long as the water to be treated can pass therethrough and the filter medium described later cannot pass through. Specifically, a plate-like molded body made of a synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, dicyclopentadiene, or a metal plate-like molded body such as iron, aluminum, stainless steel or the like subjected to rust prevention treatment. Those having a plurality of holes through which water can be passed can be suitably used. Moreover, a water flow member is installed so that attachment or detachment is possible between the receiving seat mentioned later and a projection part.
[0012]
The filter medium used in the present invention is not particularly limited as long as it has a filtration function, but can retain a large amount of microorganisms, so that a net-like cylindrical tube, a skeleton-like spherical shape, a spot-like shape, a small cylindrical shape, A molded product made of synthetic resin such as corrugated plate, tube, or fiber entangled shape, a molded product made of synthetic resin having closed cells or open cells, anthracite (anthracite), silica sand, ceramic, etc. are preferably used. be able to. Moreover, it is particularly preferable to use a floatable filter medium that floats on water from the viewpoint of handleability, cost, transportability, and the like.
[0013]
The receiving seat used for this invention is provided in the wall surface of the side wall surrounding four sides. The wall surface on which the receiving seat is provided is at least a pair of wall surfaces facing each other, and may be provided on all the two pairs of wall surfaces facing each other. The receiving seat is not particularly limited as long as the water passing member can be placed on and supported by the upper surface, and specifically, a receiving seat that protrudes in the horizontal direction on the wall surface is integrally formed. A box-shaped or L-shaped molded body that is fixed to the wall surface with bolts or an adhesive can be used.
[0014]
The protrusion used in the present invention is provided on the wall surface provided with the receiving seat, which is a predetermined distance above the receiving seat. The vertical interval between the protrusion and the receiving seat is arbitrarily changed depending on the thickness of the water passage member to be used. The protrusion is not particularly limited as long as it can lock the water-permeable member between the seat and the protrusion. Specifically, the protrusion protrudes horizontally on the wall surface. It is possible to use a unit in which the part is integrally formed, a box-shaped or L-shaped molded body fixed to a wall surface with a bolt or an adhesive, and the like.
[0015]
The cutout portion provided in the water flow member is not particularly limited as long as the water flow member is provided so as to be detachable when the water flow member is installed between the receiving seat and the protrusion. Specifically, it is preferable to provide a notch that is slightly larger than the protrusion in plan view. The notch is provided to prevent the water-permeable member from striking against the protrusion when moving the water-permeable member in the side wall, and by aligning the notch and the protrusion, the notch is passed through. The water member can pass through the protrusion. The water-permeable member after passing through the protruding portion is moved in the horizontal direction, and the installation is completed by shifting the positions of the notched portion and the protruding portion.
[0016]
The water passage member used in the present invention may be a member in which a plurality of water passage members are slidably connected. When using such a water-permeable member, the water-permeable member is slid instead of horizontally moving when the water-permeable member is attached or detached, so that the notch portion and the protruding portion of the water-permeable member are aligned. . In addition, it is preferable to provide a handle on the water passage member, and the water passage member can be easily attached and detached by providing the handle.
[0017]
The water-permeable member of the present invention is not limited to the one provided with respect to the side wall, and may be provided with two or more stages. When the multistage water flow member is provided, the filter medium can be prevented from flowing out by filling the filter medium between the water members.
[0018]
The relationship between the receiving seat and the protruding portion of the present invention is visible when part or all of the receiving seat is not obstructed by the protruding portion when the wall surface provided with the receiving seat and the protruding portion is viewed in plan. It is preferable. If it does in this way, when installing a water flow member between a receiving seat and a projection part, after a water flow member passes a projection part, a water flow member will contact a receiving seat, and a water flow member's The height position is determined and the filter bed can be easily assembled.
[0019]
The side wall used for the filter bed of the present invention is not particularly limited, and the side wall or partition wall of the septic tank may be used as long as the filter bed is built in the septic tank. Further, the filter bed of the present invention can be used as long as it performs water treatment. Specifically, the filter bed is built in a septic tank, and is separated into solid and liquid, removal of impurities, anaerobic treatment, and impurities. It can be suitably used as a filter bed for removing water and aerobic treatment.
[0020]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an embodiment showing a filter bed of the present invention, and is a partially transparent perspective view. The filter bed shown in FIG. 1 has three lattice-shaped water flow plates 27 made of polypropylene as water-permeable members installed on the side walls 28 and 29 surrounding the four sides, and between the lattice-shaped water flow plates 27, Both the upper side and the lower side are filled with a filter medium obtained by cutting a polyethylene open cell (not shown) into a dice shape. In this embodiment, the thickness of the grid-shaped water flow plate 27 is 17 mm, and the size of the grid is 6 mm in length and 17 mm in width. The size of the filter medium is about 10 mm on one side of the dice.
[0021]
The receiving seat 31 is integrally formed on the side walls 28 and 29, and receives the lattice-shaped water passing plate 27 on the upper surface that protrudes in the horizontal direction on the side walls 28 and 29. The protruding portion 32 is integrally formed with the side wall 28 at a location 20 mm upward from the receiving seat 31.
[0022]
FIG. 2 is a plan view of the lattice-shaped water flow plate 27 provided at the uppermost portion shown in FIG. 1, (a) shows when the lattice-shaped water flow plate 27 is installed, and (b) is a lattice-shaped water flow plate. 27 shows the attachment / detachment of 27. The lattice-shaped water flow plate 27 has a notch 33 slightly larger than the protrusion 32 in plan view on the long side thereof, and as shown in FIG. 2B, the notch 33 and the protrusion 32, the lattice-shaped water flow plate 27 can be placed on the receiving seat 31, and then the lattice-shaped water flow plate 27 is horizontally moved to the left as shown in FIG. can do.
[0023]
3 is a cross-sectional view of the grid-shaped water flow plate shown in FIG. 2, in which (a) is a BB cross-sectional view and (b) is a CC cross-sectional view. As shown in FIGS. 3 (a) and 3 (b), the lattice-shaped water flow plate 27 is installed between the receiving seat 31 and the projection 32, and is supported by the receiving seat 31 on the lower four sides of the end. The two upper sides of the part are locked by the protrusion 32.
[0024]
FIG. 4 is a partially exploded perspective view of the septic tank. In this embodiment, a filter bed built in a septic tank will be described. In this embodiment, the side walls 34 of the upper tank 37 and the lower tank 38 and the partition plates 5 and 6 partitioning the inside of the septic tank are used as the side walls surrounding the four sides. One pair of receiving seats 31 is provided in the upper tank 37, two pairs in the lower tank 38, and three pairs in the partition plates 5 and 6. The protrusion 32 is provided above the receiving seat 31 provided on the partition plates 5 and 6 and locks the lattice-shaped water flow plate 27.
[0025]
FIG. 5 is a plan view of the lattice-shaped water flow plate 27 provided at the uppermost portion shown in FIG. 4, wherein (a) shows the time when the lattice-shaped water flow plate 27 is installed, and (b) is the lattice-shaped water flow plate. 27 shows the attachment / detachment of 27. The lattice-shaped water flow plate 27 has a notch 33 slightly larger than the protrusion 32 in plan view on the long side, and as shown in FIG. 5B, the notch 33 and the protrusion 32, the lattice-shaped water flow plate 27 can be placed on the receiving seat 31, and then the lattice-shaped water flow plate 27 is horizontally moved to the left as shown in FIG. can do. Further, as shown in FIGS. 5A and 5B, when the air pipes 35 are passed through the lattice-shaped water flow plate 27, the notch 33 is also provided in the air pipe portion, so that the lattice-shaped water flow is provided. A plate 27 can be installed.
[0026]
6 is a cross-sectional view of the grid-shaped water flow plate 27 shown in FIG. 5, (a) is a DD cross-sectional view, and (b) is a EE cross-sectional view. As shown in FIGS. 6A and 6B, the lattice-shaped water flow plate 27 is installed between the receiving seat 31 and the protrusion 32, and is supported by the receiving seat 31 on the lower four sides of the end portion. The two upper sides of the part are locked by the protrusion 32. Further, as shown in FIG. 6B, the receiving seat 31 of the present embodiment fixes a molded body having an L-shaped cross section with a bolt 36.
[0027]
FIG. 7 is a plan view of the sliding grid-shaped water flow plate 40 in which the grid-shaped water flow plate 27 of the filter bed described with reference to FIG. Yes, (a) shows the time of installation of the sliding lattice-shaped water flow plate 40, and (b) shows the time of attachment / detachment of the sliding lattice-shaped water flow plate 40. The sliding lattice-shaped water flow plate 40 includes two lattice-shaped water flow plates 41 and 42, and is a cross-sectional view taken along the line H-H shown in FIG. 7A and FIG. Referring to FIG. 8B, which is a diagram, the lattice-shaped water flow plate 41 is provided with a fitting hole 44, the lattice-shaped water flow plate 42 is provided with a fitting protrusion, and a sliding lattice-shaped water flow plate. When attaching and detaching 40, the fitting protrusion 43 is removed from the fitting hole 44, and the notches of the sliding grid-like water passing plate 40 and the protrusions 32 provided on the side wall 28 are positioned as shown in FIG. 7. Match. And when installing the slide type grid | lattice water flow board 40, the fitting protrusion 43 is fitted to the fitting hole 44, and as shown in FIG. The position of the projection 32 provided on the side wall 28 is shifted.
[0028]
【The invention's effect】
According to the present invention, it is possible to easily attach and detach the water passage member by providing the notch, and the attachment and detachment can be performed in a shorter time by providing a handle on the water passage member. If a plurality of water passage members are provided in the vertical direction, it is possible to prevent the filter medium from flowing out.
[0029]
The receiving seat supporting the water passing member is positioned so that part or all of the receiving seat is visible without being obstructed by the projection when the wall surface is viewed in plan view. By using the side wall of the septic tank or the partition plate as the side wall of the filter bed, it is possible to reduce the number of dedicated members for forming the filter bed.
[0030]
In the septic tank incorporating the filter bed of the present invention, the water passing member can be easily attached and detached, and the maintenance inspection time can be shortened.
[Brief description of the drawings]
FIG. 1 is a partially transparent perspective view of a filter bed showing an embodiment of the present invention.
2A and 2B are plan views of the grid-shaped water flow plate shown in FIG. 1, in which FIG. 2A shows the time when the grid-type water flow plate is installed, and FIG.
3 is a cross-sectional view of the grid-shaped water flow plate shown in FIG. 2, in which (a) is a BB cross-sectional view, and (b) is a CC cross-sectional view.
FIG. 4 is a partially exploded perspective view of a septic tank showing another embodiment of the present invention.
5 is a plan view of the grid-shaped water flow plate shown in FIG. 4, where (a) shows the time when the grid-type water flow plate is installed, and (b) shows the time when the grid-type water flow plate is attached / detached.
6 is a cross-sectional view of the grid-shaped water flow plate shown in FIG. 5, in which (a) is a DD cross-sectional view and (b) is an EE cross-sectional view.
7A is a plan view of a sliding grid-shaped water flow plate, FIG. 7A shows a state when the slide-type grid water flow plate 40 is installed, and FIG. Is shown.
8 is a cross-sectional view of the sliding lattice-shaped water flow plate shown in FIG. 7, where (a) is a cross-sectional view taken along the line H-H, and (b) is a cross-sectional view taken along the line JJ.
FIG. 9 is a septic tank having a filter bed showing a conventional example, (a) shows a schematic plan perspective view, and (b) shows a cross-sectional view taken along line AA of (a).
10 is an enlarged detail view of the septic tank shown in FIG.
[Explanation of symbols]
1. Septic tank 2. 2. Anaerobic filter bed tank Aerobic filter bed tank 4. 4. Partition wall Partition wall 6. Partition wall 7. Partition wall 8. 8. Precipitation separation tank Treated water tank 10. Disinfection tank 11. Water flow plate 12. Water flow plate 13. Water flow plate 14. Water flow plate 15. Water flow plate 16. Support 17. Fixing tool 18. Support 19. Support 20. Support 21. Fixing tool 22. Air diffuser 23. Air diffuser 24. Inlet 25. Outlet 26. Filter bed tank 27. Grid-shaped water flow board 28. Side wall 29. Side wall 30. Bottom plate 31. Cradle 32. Protrusion 33. Notch 34. Side wall 35. Air tube 36. Bolt 37. Upper tank 38. Lower tank 39. Manhole 40. Sliding grid water flow plate 41. Grid-shaped water flow plate 42. Grid-shaped water flow plate 43. Fitting protrusion 44. Mating hole

Claims (6)

In a filter bed having a side wall that surrounds the four sides, a water passage member installed on the side wall, and a filter medium placed on the water passage member,
At least a pair of wall surfaces facing the side walls each have a receiving seat protruding in the horizontal direction,
Providing a protrusion projecting in the horizontal direction on the wall surface spaced upward from each receiving seat,
The water passing member installed between the receiving seat and the protruding portion has a notch so that the water passing member can be detached from between the receiving seat and the protruding portion by moving the water passing member in the horizontal direction. ,
It said water flow member, Ru der that by connecting a plurality of water passage member slidably filtration bed. The filter bed according to claim 1, wherein the water flow member includes a handle. The filter bed according to claim 1 or 2 , wherein a plurality of water passage members are provided in a vertical direction, and a filter medium is filled between the plurality of water passage members. By aligning the notch and the projection, the water flow plate is placed on the receiving seat, and when the water passing member is installed between the receiving seat and the projection, the water passing member is placed on the projection. The filter bed according to any one of claims 1 to 3 , wherein a height position of the water-permeable member is determined by the water-permeable member coming into contact with the receiving seat after passing through the filter. The filter bed according to any one of claims 1 to 4 , wherein the side wall is a partition wall provided in the side wall of the septic tank or in the septic tank and dividing the inside of the septic tank into a plurality of rooms. A septic tank incorporating the filter bed according to any one of claims 1 to 5 .

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