JP2002336882A - Combined type private sewage treatment tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combined type private sewage treatment tank which is made of iron and on each of the inner surface and the other surface of which a reinforced plastic layer is formed and in which sedimentation, aeration, microbial decomposition, etc., can be performed. SOLUTION: This combined type private sewage treatment tank is a horizontally long, almost cylindrical tank made of iron and has one or more openings on the upper side and also has a partition wall(a) made of a reinforced plastic material inside it, wherein the thickness (din ) of an inner surface reinforced plastic layer, the thickness (diron ) of an iron plate of the tank made of iron and the thickness (dout ) of an outer surface reinforced plastic layer meet the relational expression diron >din >dout , and when the diameter (D) and length of the private sewage treatment tank are 2 m and 2.5-13 m respectively, diron , din and dout are 4-8 mm, 2-6 mm and 1-4 mm respectively, or preferably, diron =6 mm, din =4 mm and dout =2 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel tank having a reinforced plastic layer formed on an outer side and an inner side thereof to purify wastewater such as drainage and human waste in the tank.
The present invention relates to a combined septic tank that performs sedimentation, aeration, or microbial decomposition.

[0002]

2. Description of the Related Art Disposal of waste such as night soil, which occurs seasonally in facilities such as mountain huts, has become a problem. And there is a strong demand for processing in such a place using a combined septic tank. In facilities such as mountain huts, the use of electric power and the like is extremely limited, and there is not enough space for providing such facilities. Also, the procurement of materials is not easy, and it is almost impossible to manufacture equipment, for example, a concrete measure, on site. In order to respond to such a request, the present inventor has proposed an invention of "a wastewater treatment system and a wastewater treatment method" using a natural energy available on the site using a transportable combined septic tank (Japanese Patent Application No. 2001-1).
36884).

[0003] There are many proposals for a water tank or a temporary fuel tank which can be transported, not installed on site, and can be easily installed. The invention of a groundwater tank according to Registered Utility Model No. 3032067 relates to a groundwater tank used for fire prevention and disaster prevention. An object of the present invention is to provide a groundwater tank having excellent durability, corrosion resistance, and load resistance. In addition, the body of the main body has a cylindrical shape, the both end portions have a spherical shape, and a reinforced plastic layer is provided on the inner and outer surfaces of the metal main body.

[0004] The underground water tank is "tolerant to external pressure because the body of the body is cylindrical and both ends are spherical. In addition, since it is made of metal, it is rich in tensile force and elasticity. Because the inner and outer surfaces are made of a reinforced plastic layer,
It has effects such as preventing corrosion and rust of the metal and supplementing the strength. And since it is molded with metal and reinforced plastic, weight reduction is achieved, transportation is easy, and installation in the ground is simple. "It is.

[0005]

However, the above-mentioned underground water tank is considered to be able to exhibit the above-mentioned effects when used in an urban area, but it is difficult to use it in a poor environment such as the above-mentioned mountain hut. There is. In a low temperature environment, the combined septic tank cannot be exposed, so it must be buried underground. Even when the body is cylindrical, it is necessary to put so-called buried sand around the tank so that an even pressure is applied when it is installed in the ground, but it is often difficult to obtain buried sand such as river sand. The object to be accommodated is sewage such as human waste, it is necessary to provide a partition inside, and it is necessary to provide an opening such as a manhole for inspection and construction, so in terms of rust prevention, strength and other points, The groundwater tank cannot be converted to a combined septic tank. An object of the present invention is to provide a combined septic tank that can be used in a poor environment such as a mountain hut as described above.

[0006]

In order to achieve the above-mentioned object, a combined septic tank according to the present invention forms a reinforced plastic layer on the outer and inner surfaces of an iron tank, and sedimentation, aeration, or In a combined septic tank for performing microbial decomposition, etc., the combined combined septic tank is formed in a horizontally long, substantially cylindrical shape, and 1
The above opening is provided, a reinforced plastic partition plate is provided _in the tank, the thickness of the reinforced plastic layer on the inner surface is (d _in ), and the thickness of the iron tank is (d _iron ).
When the thickness of the reinforced plastic layer on the outer surface is (d _out ), a relationship of d _iron > d _in > d _out is established between them.

In the septic tank, the diameter D of the septic tank
Is about 2 m to about 2.8 m and the length is about 2.5 m to about 13 m, the d _iron is 4 to 8 mm, and the d _in is 2
-6 mm, d _out 1-4 mm, more preferably d _iron = 6 mm, d _in = 4 mm, d _out = 2 mm.

The inner and outer surfaces of the iron tank are sandblasted, and the reinforced plastic layer is formed by coating or spraying. The partition plate may be integrally fixed to an inner wall surface of the iron tank and supported and fixed to an iron ring or ear covered with reinforced plastic.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the device according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view for explaining an installed state of an embodiment of a combined septic tank according to the present invention, FIG. 2 is a cross-sectional view for explaining the installed state, and FIG. FIG. 4 is a cross-sectional view cut along a plane perpendicular to the axis, and FIG. 4 is a cross-sectional view cut along a plane including the axis of the embodiment of the combined septic tank.

As shown in FIG. 1, a combined septic tank according to the present invention has a reinforced plastic layer formed on the outer and inner surfaces of an iron tank of a combined cylindrical septic tank 1 having a substantially cylindrical shape, and sedimentation and aeration are performed in the tank. Alternatively, microbial degradation or the like can be performed. The combined septic tank is horizontally long and substantially cylindrical, and is provided with one or more openings, that is, manholes 2 and 3 and square openings 4, 5, and 6 on the upper side. A partition plate made of reinforced plastic is provided in the tank 1, the inside is divided into a plurality of sections, and sedimentation, aeration, or microbial decomposition is performed in the tank.

As shown in FIG. 3, the thickness of the reinforced plastic layer 23 on the inner surface of the tank (d _in ), the thickness of the iron plate 22 of the iron tank (d _iron ), and the thickness of the reinforced plastic when the thickness of the layer 21 (d _out), between them, giving the relationship between the _{d iron> d in> d ou} t. In this embodiment, the diameter D of the combined septic tank is 2000 mm, the length L is 6000 mm, and the diameter D of the manholes 2 and 3 is D.
_man is 515mm, square openings 4,5,6 are 1115m
m × 615 mm. The same diameter D, depending on the application
In, length L2750mm, 3150mm, 3520mm
Experiments were also conducted on the devices having an outer diameter of 2.8 m and a total length of 13.0 m.

In this embodiment, the thickness of the central iron plate 22 (d
_iron ) is 6 mm, the thickness (d _out ) of the reinforced plastic layer 21 on the outer surface is 2 mm, and the reinforced plastic layer 2 on the inner surface is 2 mm.
3 has a thickness (d _in ) of 4 mm. The inner and outer surfaces of the central iron plate 22 are sandblasted in order to improve the adhesion of the plastic reinforcing layer. Making the thickness (d _in ) of the reinforced plastic layer 23 on the inner side larger than that on the outer side is to further increase the overall strength of the combined septic tank, and excrement, sludge, and sewage contained therein are contained. 30 to prevent corrosion. The painting of the outer surface is for protection of the surface, but the structural strength is ensured exclusively by increasing the thickness of the reinforced plastic layer 23 on the inner surface. The reinforced plastic layer can be formed, for example, by applying or spraying an isophthalic acid-based polyester resin.

The diameter D of the combined septic tank 1 is 2 m to 2.8.
m, the thickness of the inner and outer reinforced plastic layers and the central iron plate when the length is in the range of 2.5 to 13.03 m is d _iron >
Keeping the relationship d _{in >} d out, d _iron is 4-8 mm, d
_In is preferably in the range of 2 to 6 mm, and d _out is preferably in the range of 1 to 4 mm, and more preferably, d _iron = 6 m as described above.
m, d _in = 4 mm, d _out = 2 mm.

FIG. 4 is a sectional view of the embodiment of the combined septic tank cut along a plane including a central axis. Merger septic tank 1
An inner ring 24 made of iron for supporting the partition plate 27 is fixed to the inner surface of the partition. And on the surface,
The partition inner ring surface reinforced plastic layer 25 is formed simultaneously with the reinforced plastic layer 23 on the inner surface. The partition plate 27 is fixed to the partition inner ring 24 via the surface-reinforced plastic layer 25 by an arbitrary method.

The combined septic tank manufactured as described above can be transported and can be installed at a remote place from a house such as a mountain hut. An example of the installation will be briefly described with reference to FIGS. After providing a hole in which the combined septic tank can be buried, a simple concrete base 9 is provided on the bottom surface. A plurality of rope fittings 8 are provided on the base 9, and the combined septic tank is mounted on the base 9, and is temporarily fixed with the rope 7, and the excavated soil 12 is interposed between the excavated slope 11 and the combined septic tank. Backfill and finish installation. When burying in the ground, such as the water tank shown above or a temporary fuel tank, buried sand such as river sand is required.
Since sufficient strength is given by the above-mentioned structure, the construction can be completed by backfilling the ordinary surplus soil.

[0016]

As described above in detail, the combined septic tank according to the present invention has a strong structure, is easy to transport and install, and can be used as a facility such as a mountain hut.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining an installed state of an embodiment of a combined septic tank according to the present invention.

FIG. 2 is a cross-sectional view for explaining the installation state.

FIG. 3 is a cross-sectional view cut along a plane perpendicular to the axis of the tank in the embodiment of the combined septic tank according to the present invention.

FIG. 4 is a cross-sectional view taken along a plane including a shaft of a tank in an embodiment of the combined septic tank according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Merged septic tank 2,3 Manhole 4,5,6 Square opening 7 Rope 8 Rope fitting 9 Foundation 11 Excavation slope 12 Excavated residual soil 20 Merged septic tank wall surface 21 Outer surface reinforced plastic layer 22 Iron plate 23 Inner surface reinforced plastic layer 24 Inner partition ring 25 Inner partition ring surface reinforced plastic layer 27 Partition plate 30 Human waste, sludge, sewage, etc.

Claims (4)

[Claims] 1. A combined clarification tank in which a reinforced plastic layer is formed on an outer surface and an inner surface of an iron tank, and sedimentation, aeration, or microbial decomposition is performed in the tank. , One or more openings are provided on the upper side, a reinforced plastic partition plate is provided _in the tank, the thickness of the reinforced plastic layer on the inner surface is (d _in ), and the thickness of the iron tank is (d _iron ), wherein the thickness of the reinforced plastic layer on the outer surface is (d _out ), and the following relationship is established between them (d _out ). Note d _iron > d _in > d _out 2. The septic tank according to claim 1, wherein when the diameter D of the septic tank ranges from about 2 m to about 2.8 m and the length ranges from about 2.5 m to about 13 m, the d _iron is 4 to 4. 8 mm, d _in is 2 to 6 mm, d _out 1
~ 4mm, more preferably d _iron = 6m
A combined septic tank with m, d _in = 4 mm and d _out = 2 mm. 3. The combined septic tank according to claim 1, wherein the inner and outer surfaces of the iron tank are subjected to sandblasting, and the reinforced plastic layer is formed by coating or spraying. 4. The combined septic tank according to claim 1, wherein said partition plate is provided integrally on an inner wall surface of said iron tank and supported and fixed on an iron ring or ear covered with reinforced plastic.