JPH11200426A - Rainwater storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rainwater storage device capable of excluding initial rainwater in which impurities such as earth and sand are mixed, and preventing the growth of algae and miscellaneous germs over a long period by collecting and sterilizing the rainwater of a heavy rain in which few impurities such as earth and sand are mixed. SOLUTION: A bypass pipe 2 is connected to the appropriate part of a leader 1 connected to a rain gutter, etc., and a valve seat 11 is provided on the interior wall of the leader 1 located close to the lower end of the outlet of the bypass pipe 2. A valve element 12 is placed below the valve seat 11 in such a way as to abut to the valve seat 11 from below when pushed up and to leave it. The lower end of the leader 1 is connected to a water storage tank 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can eliminate initial rainwater containing impurities such as earth and sand, and can collect rainwater at the time of full-scale rainfall with a small amount of impurities such as earth and sand. The present invention relates to a rainwater storage device capable of sterilizing rainwater led to a rainwater and preventing the growth of algae and various germs for a long period of time.

[0002]

2. Description of the Related Art In recent years, rainwater collected by an eaves gutter or the like is introduced into a water storage tank and stored therein, and this rainwater is used as water for washing a toilet or washing a car, watering a garden tree or a flower bed, or It is used as water for emergency disaster. For example, as shown in FIG. 2, rainwater collected by an eaves gutter a is led to a water storage tank b, and the rainwater stored in the water storage tank b is appropriately taken out and used.

[0003]

However, the initial rainwater collected by eaves gutters contains dust floating in the air and sediment deposited on the roofs of buildings. ,
Depending on the purpose of use of rainwater, it can be used only after filtering once. Therefore, rainwater collected by eaves gutters is led to a sedimentation tank to sediment and separate contaminants such as earth and sand, dust, etc. In addition, there is a problem that the maintenance and inspection are troublesome.

[0004] In addition, the only thing that can be removed by introducing rainwater into the sedimentation tank is the relatively large specific gravity of soil and the like, and there is a problem that dust and the like suspended in the air having a small specific gravity cannot be removed. .

Further, when rainwater is stored in a water storage tank for a long period of time, there is a problem in health and safety that algae and various germs are propagated by organic substances mixed in the rainwater.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and can eliminate initial rainwater in which contaminants such as earth and sand are mixed, and capture rainwater during a full-scale rainfall in which impurities such as earth and sand are small. It is an object of the present invention to provide a rainwater storage device that collects and sterilizes and can prevent the growth of algae and various bacteria for a long period of time.

[0007]

According to a first aspect of the present invention, a bypass pipe is connected to an appropriate location of a downspout connected to a rain gutter or the like, and a valve is provided on the inner wall of the downspout near the lower end of the outlet of the bypass pipe. A seat is provided, a valve body is provided below the valve seat, and the valve body is pushed up by an elastic body so as to contact and separate from the valve seat from below. Characterized in that it is connected to

According to a second aspect of the invention, the inside of the water storage tank is vertically divided by a partition plate, and an upper water storage chamber is provided above the partition plate and a lower water storage chamber is provided below the partition. A large number of through-holes are provided in the partition plate, and a cylindrical filter having an infinite number of fine holes on the periphery of each through-hole is rising, and rainwater flowing into the upper water storage chamber from the downspout passes through the cylindrical filter. In this case, dust and the like mixed in the rainwater are filtered through a myriad of fine holes and then flow into the lower water storage chamber.

According to a third aspect of the present invention, the cylindrical filter is obtained by adding zeolite solid particles carrying metal ions such as silver and copper to ultra-high molecular weight polyethylene and then sintering the same to form an infinite number of fine pores. When the rainwater flowing into the upper water storage chamber passes through the cylindrical filter, dust and the like mixed in the rainwater are filtered through a myriad of fine pores, and the zeolite solid exposed from the fine pores is formed. It is characterized in that it is sterilized in contact with the particles and then flows into the lower water storage chamber.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic sectional view of a storage device showing one embodiment of the present invention, in which 1 is a downspout, 2 is a bypass pipe, and 3 is a water storage tank.

The upper end of the downspout 1 is connected to a rain gutter (not shown) or the like, and the lower end of the downspout 1 is connected to a water storage tank 3. A bypass pipe 2 is connected to an appropriate position of the downspout 1, and a valve seat 11 is provided on an inner wall of the downspout 1 near the lower end of the outlet of the bypass pipe 2. A valve body 12 is disposed below the valve seat 11, and the valve body 12 is pushed up by an elastic body 13 such as a coil spring and is in contact with the valve seat 11 from below. Reference numeral 14 denotes a support rod for supporting the elastic body 13 from below. Although not shown, the urging force of the elastic body 13 for pressing the valve body 12 against the valve seat 11 is obtained by moving the support rod 14 up and down and fixing the support rod. Can be adjusted.

Normally, the biasing force of the elastic body 13 is set as follows. That is, the valve element 12 is set so as to be pressed against the valve seat 11 by the urging force of the elastic body 13 to be closed when the initial rainwater slowly flows down in the downspout 1. The generated initial rainwater is discharged from the bypass pipe 2. Then, when a large amount of rainwater vigorously falls in the downspout 1 during a full rainfall, the valve element 12 descends due to the falling water pressure exceeding the urging force of the elastic body 13, and the rainwater vertically flows in the downpipe 1. And flows into the water storage tank 3.

The water storage tank 3 is rectangular or cylindrical, and the inside of the water storage tank 3 is divided into upper and lower parts by a partition plate 4. A chamber 1b is provided. That is, the partition plate 4
The upper end flange 43 is supported by a support bar 33 provided around the inner wall of the water storage tank 3 so that the upper water storage chamber 1a is above the partition plate 4 and the lower water storage chamber 1b is below.
Is provided. Further, a large number of through holes 41 are provided in the partition plate 4, and the cylindrical filter 5 is vertically set up on the periphery of each of the through holes 41. The upper opening of the water storage tank 3 is covered with a top plate 6, and the lower end of the downspout 1 is connected to a through hole provided in the top plate 6.

The cylindrical filter 5 has a particle size of 1 to 3 μm.
A plastic filter formed by adding zeolite solid particles having metal ions such as silver and copper to ultra-high molecular weight polyethylene and sinter molding to form a cylindrical shape can be used. The cylindrical wall of the cylindrical filter 5 has a hole diameter of 50-3.
Innumerable micropores of about 00 μm are formed, and zeolite solid particles are exposed on the inner and outer peripheral surfaces of the cylindrical wall and the myriad micropores.

Such a plastic filter has a large porosity of micropores, so that clogging hardly occurs and it can be used for a long period of time. If the pore size of the micropores is about 50 to 300 μm, dust of 50 to 300 μm or more can be obtained. Contaminants such as sand and sand can be efficiently captured. Usually, the cylindrical filter 5 has an outer diameter of 50 to 100 mm and a length of 300 to 1,000 mm.
Can be suitably used. The upper end of each cylindrical filter 5 raised from the partition plate 4 is slightly higher than the overflow port 31 provided in the upper part of the side wall of the water storage tank 3, and the rainwater flowing into the upper water storage chamber 1 a receives the rain water.
So that it does not flow into the lower water storage chamber 1b without passing through. On the other hand, an outlet 32 for purified rainwater is provided at a lower part of the side wall of the water storage tank 3.

The storage device according to the present invention has the above-described structure. Rainwater that has fallen on the roof of a building or the like is collected by an eaves gutter or the like and flows down the downspout 1. Since the initial rainwater slowly flows down in the downspout 1, the valve body 12 is in contact with the valve seat 11 by the urging force of the elastic body 13. For this reason, the initial rainwater mixed with dust floating in the air and earth and sand deposited on the roof of the building or the like is discharged from the bypass pipe 2. When a large amount of rainwater falls vigorously in the downspout 1 during a full-scale rainfall, the valve element 12 descends due to the falling water pressure that exceeds the urging force of the elastic body 13, and relatively clear rainwater flows down the downpipe. 1 falls into the water storage tank 3.

Next, when rainwater flowing into the upper water storage chamber 1a passes through the cylindrical wall of the cylindrical filter 5, dust and the like mixed in the rainwater are trapped by the innumerable fine holes, and the cylindrical filter is trapped. When passing through the cylindrical wall of No. 5, zeolite solid particles exposed from numerous micropores and the like are sterilized. For this reason, even if rainwater is stored in the water storage tank 3 for a long period of time, algae and various bacteria do not propagate.

In the process of purifying rainwater, when the cylindrical filter 5 becomes clogged, the cylindrical filter 5 is replaced with a new one or washed and reused. At this time, the top plate 6 is removed, and a large number of cylindrical filters 5 together with the partition plate 4 are integrally removed and replaced with a new one, or washed and reused. In this way, a large number of tubular filters 5 can be easily replaced or cleaned in a short time. In addition, when the cylindrical filter is replaced or washed, repair, inspection, and cleaning work in the water storage tank can be performed.

[0019]

As described in detail above, the use of the rainwater storage device of the present invention makes it possible to use the initial rainwater containing dust floating in the atmosphere, sediment deposited on the roof of a building, and the like. Can be eliminated, so that the purification treatment of rainwater can be performed efficiently.
Then, the relatively clear rainwater at the time of full-scale rainfall is guided to a water storage tank, filtered by a cylindrical filter having a myriad of fine pores, and sterilized with zeolite solid particles exposed from the fine pores, etc. Even if it stays in the water tank for a long time, there is no generation of algae or propagation of various bacteria.

Further, since a large number of cylindrical filters installed in the water storage tank can be integrally removed together with the partition plate, replacement and cleaning of the cylindrical filters can be easily performed in a short time. At the same time, repairs, inspections, and cleaning of the water tank can be performed. Furthermore, by changing the shape, size, and the like of the partition plate, it can be used for various water tanks having different sizes.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a rainwater storage device showing one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Downspout 11 Valve seat 12 Valve 13 Elastic body 2 Bypass pipe 3 Water tank 4 Partition plate

Claims (3)

[Claims] 1. A bypass pipe (2) is connected to an appropriate location of a downspout (1) connected to a rain gutter or the like.
Valve seat (1) on the inner wall of the downspout (1)
1), and a valve body (12) is disposed below the valve seat (11), and the valve body (12) is pushed up by an elastic body (13) to contact the valve seat (11) from below. A rainwater storage device characterized by being disposed so as to be separated from each other and having a lower end of a downspout (1) connected to a water storage tank (3). The inside of the water storage tank (3) is vertically divided by a partition (4), and an upper water storage chamber is provided above the partition plate (4) and a lower water storage chamber is provided below the upper water storage chamber. The partition plate (4) is provided with a large number of through-holes (41), and a cylindrical filter (5) having an infinite number of fine holes at the periphery of each through-hole (41) is raised. When rainwater flowing from the downspout (1) into the upper water storage chamber passes through the cylindrical filter (5), dust and the like mixed in the rainwater are filtered through the myriad of fine holes before flowing into the lower water storage chamber. The rainwater storage device according to claim 1, wherein the rainwater is stored. 3. A plastic filter in which zeolite solid particles carrying metal ions such as silver and copper are added to ultra-high molecular weight polyethylene and then sintered and molded to form innumerable micropores. When the rainwater flowing into the upper water storage chamber passes through the cylindrical filter, dust and the like mixed in the rainwater are filtered through the myriad of fine pores and come into contact with the zeolite solid particles exposed from the fine pores and the like. 3. The rainwater storage device according to claim 2, wherein the rainwater flows into the lower water storage chamber after being sterilized.