JP2003268813A - Rainwater storage tank using corrugated polyolefin pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rainwater storage tank, which is lightened and simplified, the cost of which is reduced, which is enlarged easily and in which environmental load in the case of a disuse is decreased, and to enable various forms such as a ground installation, an underground installation, an upstair installation or the like even in an installation method. <P>SOLUTION: A corrugated polyethylene or polypropylene pipe is used as the tank body of a water storage tank. The form of a corrugated form is formed in a trigonometric functional curved shape or a rectangular crease shape, and the size of the corrugated form is specified in 0.05≤/D≤0.20 and 0.07≤1/D≤0.30 when the height of the corrugated form is represented by (h), a pitch by 1 and the outside diameter of the pipe by D. Density is set from 0.930 to 0.980 in polyethylene. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage tank which can be easily increased in size and is lightweight and simple for utilizing rainwater collected from a roof of a house as domestic water.

[0002]

2. Description of the Related Art Up to now, a water tank using rainwater has a material and structure such as a metal drum, a metal water tank, a synthetic resin (polyethylene etc.) cylinder, a PVC straight pipe,
It was a water tank made of PVC, a water tank made of FRP, or the like. As an example, in Japanese Patent Laid-Open No. 9-316939, the tank body is made of stainless steel or a surface-treated metal that is resistant to rust.
In 3552, the tank body is made of synthetic resin (polyethylene or the like), but is a corrugated cylindrical body.
In 41374, a multi-tank tank is proposed for storing a large amount of rainwater.

[0003]

The above-mentioned water storage tank has the drawbacks that it is heavy because it exhibits strength as a water storage tank, it is difficult to make a large one, it is expensive, and it is difficult to dispose (recyclability, incineration). Had.

The present invention solves the conventional drawbacks and provides a product which is lightweight, simple, and easy to manufacture, and which is inexpensive, has a low environmental load at the time of disposal.

[0005]

According to the present invention, by using the corrugated polyolefin tube described in claim 1,
The compressive strength in the diameter direction of the pipe is superior to that of the straight pipe, and as a result, it is possible to reduce the wall thickness of the pipe. Furthermore, compared with metal, PVC and FRP, it is lightweight and simple because it is made of polyolefin. It becomes a water tank.

Further, the wave height (h) and pitch (l) of the corrugated tube are 0.05≤h / D as described in claim 2.
By defining ≦ 0.20 and 0.07 ≦ l / D ≦ 0.30, excellent compressive strength can be exhibited without increasing the wall thickness of the tube. If the height of the wave is higher than the specified range, or if the pitch is too long, sufficient compressive strength will not be expressed, and if the height is too low or the pitch is too short, it will be difficult to manufacture the pipe. This causes an increase in manufacturing cost.

Further, by defining the overall size of the tank body as described in claim 3, the capacity of the tank body is 2
An arbitrary capacity can be selected from about 0 liter to about 15 cubic meters, and a lightweight and large tank can be provided.

Further, as described in claim 4, the polyolefin as the material of the pipe is preferably polyethylene or polypropylene. Among general-purpose resins, polyethylene and polypropylene have low density, excellent impact resistance, and are inexpensive. Further, by adjusting the density of polyethylene from 0.930 to 0.980, the rigidity of the resin itself is secured, the wall thickness of the storage tank can be made thin, and the size can be easily increased.

Similarly, since the pipe material is polyethylene or polypropylene, it does not contain a special filler like FRP and does not contain chlorine atoms in the resin like PVC, so that the resin can be recycled and burned. It is a product with excellent disposability and low environmental impact at the time of disposal. The weather resistance of the tube itself is solved by including an appropriate amount of carbon black.

Further, as described in claim 5, the method of installing the storage tank is that the tank of the present invention is lightweight and its size can be easily changed, and since it has weather resistance, it is installed on the ground or underground. It can be either buried or installed upstairs, including the first floor of a house, and is therefore a product with excellent convenience and installation flexibility. Particularly in the case of underground burial, since it has excellent compressive strength due to corrugation, even if it is lightweight and large, it can easily withstand earth pressure.

By attaching the accessory described in claim 5 to the tank body, the function and convenience as a rainwater storage tank can be achieved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 are drawings relating to the shape and main dimensions of the wave of the corrugated tube used in the present invention. FIG. 1 shows a wave shape of a trigonometric curve, and FIG. 2 shows a rectangular fold shape. Further, there are (a) spiral shape and (b) ring shape depending on how the wave is applied. What is a spiral shape?
It has a spiral shape in the tube axis direction, and the waves are continuously connected. The ring shape is an independent ring shape repeatedly applied to the tube axis direction. The main dimensions that characterize a wave are the wave height (h), pitch (l) and outer diameter (D).
And, respectively, as shown in the figure.

FIG. 3 is an embodiment of the present invention and is a cross-sectional view of a vertical type ground-based water storage tank. The corrugated pipe (tank body) 1 is made of polyethylene with a density of 0.951, and the corrugation has a trigonometric curve shape and a spiral shape, and an outer diameter (D) = 530 m.
m, wave height (h) = 35 mm, pitch (l) = 70 m
In m, it corresponds to h / D = 0.066, 1 / D = 0.13, the height of the tank (L) = 1,700 mm, and the internal volume is about 3
It is 30 liters. The bottom plate 2 is made of polyethylene and is joined to the tank body 1 by heat fusion, and the upper lid 3 is a polyethylene plate with a nozzle 4 and an opening 5 fused to a socket tube cut to a height of 200 mm. is there. The socket tube is fitted by screwing it into the tank body 1. The polyethylene of the tank body 1, the bottom plate 2, the upper lid 3 and the like in this embodiment contains an appropriate amount of carbon black, is black, and has weather resistance.

The nozzle 4 attached to the upper lid is an inlet for rainwater from a rain gutter, and a wire mesh-like dust remover may be attached to the tip thereof. The small opening submersible pump 8 for household use is thrown in through the opening 5, and the rainwater collected in the water tank is used for various purposes as domestic water. Further, the opening 5 is used as an opening for inserting a cleaning tool when the inner surface of the water storage tank becomes dirty.

An overflow port 6 and a drain port 7 are attached to the side surface of the tank body 1. The overflow port may be provided inside the tank like 6a. The drain port 7 may be an outlet for the collected rainwater.

FIG. 4 is a sectional view of a horizontal underground underground water storage tank according to one embodiment of the present invention. The corrugated pipe (tank body) 11 is made of polyethylene having a density of 0.951, the corrugated shape is a trigonometric curve shape and a spiral shape, and the outer diameter (D) = 750 m.
m, wave height (h) = 50 mm, pitch (l) = 70 m
In m, it corresponds to h / D = 0.067, 1 / D = 0.10, the length of the tank (L) = 1,500 mm, and the internal volume is about 5
It is 70 liters. The side plate 12 is made of polyethylene and is joined to the tank body 11 by heat fusion. Tank 11, side plate 12
The polyethylene of (1) contains a proper amount of carbon black, is black, and has weather resistance.

A nozzle 13 and an opening 14 which are inlets for rainwater are provided on the upper part of the tank body. The opening 14 has a nominal diameter of 40
It is a pipe of about 0 mm, from which a small-sized submersible pump for household use is put in, and rainwater collected in a water storage tank is drawn out and used for various purposes as domestic water. In addition, the opening 14 is used as an opening for observing the amount of water stored therein and for inserting a cleaning tool when the inside of the tank is dirty and for inserting a drain hose. The opening 14 also functions as a vent.

According to the method of installing the water tank of the present invention, as shown in FIG. 3, in the case of installation on the ground, the iron plate 10 or the like is laid on the concrete block 9 or the like, and the tank body 1 is installed thereon. The installation position may be a suitable place under the eaves of the house. In addition, if an appropriate storage tank size is selected, it can be installed on the first floor or two or more floors of the house in the same manner as described above. In particular, when it is installed at a high place on the second floor or higher, it is advantageous because the hydrostatic pressure of the stored water can be used when it is used as domestic water.

In the case of underground burial, as shown in FIG. 5, gravel, sand 16 and the like are laid in the holes of the bare earth, and the tank 11 is buried on the gravel. Fill both sides with soil without any gaps. It is preferable that the upper end of the water storage tank is such that the upper end of the opening 14 is slightly exposed to the ground. When the space above the buried part becomes wider and water is used,
It is also convenient for observing and cleaning the inside of the tank. The upper part of the tank other than the opening 14 may be backfilled with soil. The burial location may be a suitable place under the eaves of the house.

[0021]

Since the present invention is constructed as described above, it has the following effects. First, claim 1
Due to the material, size and structure as mentioned in 2, 3 and 4,
It is possible to provide a lightweight, convenient, and inexpensive water tank for using rainwater collected from the roof of a house as domestic water. Further, by providing the tank body with a corrugated shape, it is possible to provide a water storage tank having excellent compression resistance, which can be easily increased in size while remaining lightweight. Further, since the material of the tank is polyethylene or polypropylene, it is possible to provide a water storage tank which has excellent recyclability and incineration property of resin and has a small environmental load at the time of disposal.
At the same time, because it is lightweight and size can be easily selected,
Various methods such as above-ground installation, underground burial, and upstairs installation are possible. Since the tank body contains an appropriate amount of carbon black, it has excellent weather resistance and has sufficient durability even when installed outdoors.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a corrugated tube used in the present invention. (Trigonometric curve shape) (a) Spiral shape (b) Omitted

FIG. 2 is a diagram illustrating a corrugated tube used in the present invention. (Rectangular fold) (a) Spiral shape (b) Ring shape

FIG. 3 is a cross-sectional view of a vertical ground-based water storage tank that is an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a horizontal underground buried water storage tank that is an embodiment of the present invention.

FIG. 5 is an example of underground burial.

[Explanation of symbols]

1 tank 2 Bottom plate 3 Upper lid 4 nozzles 5 opening 6.6a Overflow port 7 Drain mouth 8 Household small submersible pumps 9 concrete blocks 10 iron plate 11 tank 12 side plates 13 nozzles 14 opening 15 Household small submersible pumps 16 gravel, sand

Claims (5)

[Claims] 1. A rainwater storage tank for storing rainwater collected from a roof of a house, characterized by using a corrugated polyolefin pipe as a tank body. 2. The wave of the corrugated tube is a trigonometric curve or a rectangular fold, and the height (h) and pitch (l) of the wave are the outer diameter (D) of the tube. On the other hand, 0.05 ≦ h / D ≦ 0.20 0.07 ≦ l / D ≦ 0.30, The rainwater storage tank according to claim 1, wherein 3. The overall dimensions of the tank body include the outer diameter (D) of the tank body (unit: mm), the length or height (L) of the tank body (unit: mm), and the wall thickness of the tank body ( t) (unit: mm), 110 ≦ D ≦ 2,400 500 ≦ L ≦ 5,500 1.5 ≦ t ≦ 20.0, The rainwater storage water according to claim 1 or 2, Tank. 4. The polyolefin is polyethylene or polypropylene, and polyethylene has a density of 0.
It is 930 to 0.980, The rainwater storage tank of Claim 1, 2 or 3 characterized by the above-mentioned. 5. The method for installing a water tank is ground installation, underground burial or upstairs installation including the first floor of a house, and rainwater receiving nozzles, water extraction nozzles, tank cleaning etc. as accessories of the water tank. The rainwater storage tank according to claim 1, further comprising an opening, a drain, an overflow, a vent, a small household submersible pump, and the like.