JPH10219782A - Water storage tank of bathing drain reutilization system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate execution by making the bottom part of a water storing tank a flat face, and making size capable of burying width and height size of the tank between an adjacent boundary and a building without forming a recess and projection part on the inner face of the tank. SOLUTION: A water storing tank 2 is formed in the form of a substantial cylinder having a flat face 2b on the bottom part in a front view. An inspection opening 2a formed in the form of a substantial cylinder in a planar view is provided on the upper part of the tank 2. No irregularity such as a reinforcing rib is formed on the inside of the tank 2. Width W1 of the tank 2 is the same as or smaller than an interval excepting the size from the center of a buried foundation to the end of the buried foundation and the size from the center of a fence between an adjacent dwelling to the end of the buried foundation from the size of the buried foundation of a building to the adjacent boundary line. Furthermore, height H of the tank 2 is the same as or smaller than the interval. Thereby the tank 2 can be easily horizontally set and buried in a narrow space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried type water storage tank in a system for reusing bathtub water as toilet flush water in a house.

[0002]

2. Description of the Related Art Japan has a high population density and annual rainfall per person cannot be said to be large. In addition, the terrain is sharp and available water is even less. However, the amount of water used is increasing year by year, and the current situation is that the problem of drought occurs every year.

Under such circumstances, in order to effectively use water resources, drainage from a bathtub having a relatively good water quality and a stable water amount is stored in a water storage tank buried underground, and the water is stored in the storage tank. Conventionally, a bath drainage reuse system has been proposed in which bath drainage in a tank is suctioned and discharged by a pump and reused as toilet flush water for toilets. It was not designed specifically for the system, but instead used a toilet or septic tank with an excess capacity to be used in the bath wastewater recycling system.

[0004]

However, the space for burying the water storage tank is also becoming narrower in the residential land in Japan, which is becoming ever smaller, and the boundary between the building where the water storage tank is usually buried and the adjacent land is located. The space between
Many are about 1 m, which may be required by the City Planning Act.

In such a small space, a sewage tank or a septic tank having an unnecessarily large capacity requires a large amount of excavation for embedding and increases construction costs, and a large width dimension cannot be embedded. In some cases, it was necessary to dig deep into the site to bury a large height, and construction was sometimes difficult. In the bath and wastewater reuse system, it is desirable that the water storage tank be smaller in consideration of workability and site compatibility. In addition, since reinforcing ribs are formed on the inner surfaces of the toilet tank and the septic tank, sediment easily accumulates in the water storage tank. Was difficult to be discharged to

[0006]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, the water storage tank is formed in a substantially cylindrical shape having a flat surface at the bottom, without forming an uneven portion on the inner surface of the water storage tank that hinders the flow of sediment. The tank is dimensioned so that it can be buried even in a narrow space of about 1 m between the adjacent land boundary and the building, and the capacity of the water storage tank is set to the minimum capacity at which the system functions efficiently.

In addition, the water storage tank is formed in a substantially cylindrical shape having a flat surface at the bottom, and no irregularities are formed on the inner surface of the water storage tank to prevent the flow of sediment. The storage tank is approximately 1 between the adjacent land boundary and the building.
In other words, the dimensions are such that they can be buried even in a small space of m, and the effective capacity of the water storage tank is a minimum capacity capable of storing the entire amount of bath water.

[0008]

Next, an embodiment of the present invention will be described. FIG. 1 is a view showing an embodiment of a bath / drain reuse system in a house where a bathroom is provided only on the first floor and a toilet is provided on the first and second floors, and FIG. 2 is a mechanism for guiding bathtub water inside the bathtub to a water storage tank. FIG. 3 is a diagram showing a mechanism for agitating bath drainage of a water storage tank, FIG. 4 is a plan view of a state where a water storage tank is buried in a space between a building and an adjacent land on the north side on a residential site, and FIG. Sectional view showing the buried space of the water storage tank when the water storage tank is buried in the space between the building and the site adjacent to the site, FIG. 6 is a plan view of the water storage tank, FIG. 7 is a side view of the water storage tank, and FIG. FIG.

Referring to FIG. 1, an outline of the bath wastewater recycling system will be described. Bathtub 1 inside bathroom C located in house
Is provided. Since the water in the bathtub 1 becomes unnecessary after bathing, the water is stored in the water storage tank 2 from the drain port 1a via the drain pipe 8. The drain pipe 8 is a path for guiding bath drainage into the water storage tank 2. And the sewage used in the washing place of the bathroom C is discharged from the drain port 1b.
The sewage is configured to flow to the sewage 9 via a sewage drain pipe 19 which is a route for guiding the sewage to the sewage 9. Further, an eye plate 35 for removing hair and the like in the bath drainage is provided at the drain port 1a. This prevents hair and the like from entering the water storage tank 2.

Bath water drained from the drain pipe 8 into the water storage tank 2 and stored in the water storage tank 2 is supplied to the washing water tank 3 by the water pump 5 together with the use of the toilet 5. That is, when the washing water in the washing water tank 3 decreases, the washing water is sucked from the suction pipe 6 by the pump 4 and supplied to the washing water tank 3 via the pump pipe 7. Similarly, when the toilet 15 is used, the bath drainage in the water storage tank 2 is supplied to the washing water tank 13 by the water pump 4. Then, the washing water after washing the toilet 5 or the toilet 15 is drained from the washing drain pipe 12 to the sewer 9.

When the amount of the bath drainage stored in the water storage tank 2 is increased from the bath tub 1 to the amount used from the toilet D and the water in the water storage tank 2 becomes full, the overflow pipe 29 causes the sewerage. Drained to 9. Conversely, when the amount of water used in the toilet D becomes larger than the amount supplied from the bathtub 1 and the water level in the water storage tank 2 approaches the tip level of the water suction pipe 6 of the water pump 4, the replenishing pipe 28
It is configured so that tap water is replenished from. In addition, since the bath drainage from the bathtub 1 has a relatively high temperature and is rich in organic substances and is in a state suitable for propagation of microorganisms and the like, the sterilization tank 20 is arranged in the middle of the drainage pipe 8. In the sterilization tank 20, chlorine in bath water is sterilized.

Next, referring to FIGS. 2 and 3, the operation of the bathtub 1, the water storage tank 2, the water pump 4, and the washing tanks 3 and 13 will be described. A drain port 1 a is provided at the bottom of the bathtub 1, and the drain port 1 a is connected to a sterilization tank 20 through a drain pipe 8.
From the water storage tank 2. When the bath drainage of the bathtub 1 is stored in the water storage tank 2, the drainage port 1 is used.
a is opened.

When the amount of bath water drained from the drain port 1a through the drain pipe 8 to the water storage tank 2 is reduced, the ball tap 16 detects the decrease and opens the replenishing pipe 28. Then, tap water is supplied and replenished, and at least the washing water is replenished so that the water surface is located above the lower end of the water absorption pipe 6. The water absorption pipe 6 by the pump 4
The washing water supplied to the washing water tanks 3 and 13 via the pumping pipe 7 sucks the bath wastewater in the water storage tank 2 from
A predetermined amount is always stored in the washing water tanks 3 and 13 by the ball tap 17 in the washing water tanks 3 and 13.

As shown in FIG. 3, a bypass pipe 32 is provided at an intermediate portion of a pumping pipe 7 for guiding the bath drainage sucked by the pump 4 to the washing tanks 3 and 13. Is provided with a solenoid valve 31.
The solenoid valve 31 is configured to open and close in conjunction with the operation of the water pump 4, and a nozzle 32 a for jetting washing water is attached to a lower end of the bypass pipe 32.

When the washing water in the washing water tanks 3 and 13 decreases and the valve of the ball tap is opened to supply the washing water to the washing water tanks 3 and 13, the pressure in the pumping pipe 7 decreases. The pressure switch 4a is turned on, and the pump 4 starts operating. The pump 4 and the solenoid valve 3
Since 1 is interlocked, the solenoid valve 31 opens at the same time as the operation of the pump 4 starts. When the electromagnetic valve 31 is opened, a part of the washing water discharged from the water pump 4 flows to the nozzle 32 a through the bypass pipe 32. Wash water is spouted from the nozzle 32a into the bath drainage in the water storage tank 2 to agitate the bath drainage in the water storage tank 2. When the bath effluent is agitated, the sediment that has settled at the bottom of the water storage tank 2 is mixed with the bath effluent and floats in the bath effluent. It is done.

Further, in this case, the tip of the nozzle 32a is mounted at an angle and a direction at which the sediment is mixed best with the bath drainage. When the supply of water to the washing water tanks 3 and 13 is completed, the pressure in the water pumping pipe 7 rises, the pressure switch 4a is turned off, the water pump 4 stops, and the solenoid valve 31 is closed.

The stirring of the bath wastewater is repeated every time the washing water is supplied to the washing water tanks 3 and 13. However, most of the sediment in the water storage tank 2 is removed by this bath wastewater stirring mechanism. The water is absorbed together with the bath water,
Since the sediment can be discharged from the inside, the sediment is not left in the water storage tank 2 for a long period of time, and there is no need to clean the water storage tank 2.

A strainer 22 is provided at an intermediate portion of the water supply pipe 6 to allow the sediment to pass therethrough. However, for example, a water pump 4 for removing hair or the like that has failed to be removed by the perforated plate 35 of the drain port 1a is provided. They try to remove large foreign objects that can cause clogging. This strainer 22
It is installed in an easily visible place on the ground,
And it is constituted so that maintenance can be performed easily.

As described above, without using a dedicated pump or a stirrer, while using the existing equipment, the inside of the water storage tank 2 is stirred only when necessary, and the sediment in the water storage tank is discharged. As a result, an inexpensive bath wastewater recycling system was realized.

The pump 4 can be a small pump of the same type as a well pump for home use.
It is composed of a pump, a pressure tank, a pressure switch 4a and the like. When the washing water is used, the pressure in the pressure tank decreases, and the pressure switch 4a senses this, and the water pump 4 is automatically driven to perform water supply.

FIG. 4 shows the arrangement of the bathroom C, the toilet D, and the water storage tank 2 on the premises of the house A.
In general, the bathroom C and the toilet D are usually arranged at a corner in the north of the house A, and the water storage tank 2 of the bath / drain reuse system of the present invention is also located in the adjacent area on the north side of the house A. And is buried between the wall B provided between them. Normally, house-related laws and regulations require that the distance T between the wall surface on the north side of the house A and the fence B be maintained at about 1 m.
By embedding, the piping from the bathroom C and the toilet D can be shortened.

In the interval T, the interval that can be used to actually bury the water storage tank 2 is in the range of the interval W in FIG. That is, from the dimension L from the buried foundation 26 of the building to the adjacent land boundary line 34, the dimension L1 from the center of the buried foundation 26 of the building to the end of the buried foundation 26, and the center of the buried foundation 33 of the wall B from the buried foundation 33 Dimension L up to 33 ends
2 is the interval W excluding 2.

The water storage tank 2 will be described with reference to FIGS. As described above, the space W, which is a space required for embedding the water storage tank 2, is often small, but in order to enable the water storage tank 2 to be embedded between the narrow space W, The width W1 of the water storage tank 2 shown in FIG. 8 is the same as or smaller than the interval W. The height H of the water storage tank 2 is the same as the width W or smaller than the interval W, and the embedding depth is reduced to facilitate construction.

The amount of bath drainage discharged from the bathtub 1 is about 90% of the full water capacity of the bathtub 1 in most cases. Therefore, the effective capacity of the water storage tank 2 is set to the minimum necessary capacity for storing all of the bath drainage.

The water storage tank 2 is formed in a substantially cylindrical shape having a flat surface 2b at the bottom in a front view, and an inspection port 2a formed in a substantially circular shape in a plan view is provided at an upper portion. Through the inspection opening 2a, it is possible to inspect the inside of the water storage tank 2 and the like. By being formed in such a shape, it becomes easy to install horizontally when burying in the ground, and it is strong against the earth pressure received from around the water storage tank 2 to prevent deformation and breakage. Can be. Further, since no irregularities such as reinforcing ribs are formed inside the water storage tank 2, the sediment easily flows and stirring is not hindered. As described above, the structure is such that sediment hardly accumulates in the water storage tank 2 and the sediment is easily discharged out of the water storage tank 2.

Since the water storage tank 2 is formed as described above,
Even if the site to be buried is a narrow space where the distance between the outer wall of the building and the boundary of the adjacent land is about 1 m, the water storage tank 2 can be buried, and the water storage tank 2 can be easily installed horizontally when buried. , Construction became easy. Further, all of the discharged bathwater can be stored in the water storage tank 2, and if a family of 4 or 5 people can reuse all of the bathwater, a high water-saving effect can be obtained. . In addition, deformation and breakage of the water storage tank 2 in the soil can be prevented. Further, sediment hardly accumulates in the water storage tank 2, and the sediment
It has become easier to be discharged outside.

[0027]

As described above, the present invention has the following advantages. That is, since the construction is made as in claim 1, even if the site to be embedded is a small space, the water storage tank 2 can be easily installed horizontally and embedded, and the construction can be easily performed. The construction cost was reduced. Further, deformation and breakage of the water storage tank 2 in the soil can be prevented, and sediment hardly accumulates in the water storage tank 2 and is easily discharged. In addition, since all of the bath wastewater can be reused, a high water saving effect was obtained.

[0028] Further, since the buried site is a small space where the distance between the outer wall of the building and the boundary of the adjacent land is about 1 m, the water storage tank 2 is provided.
The water storage tank 2 can be easily and horizontally installed at the time of burial, and the construction has been facilitated, so that the construction cost has been reduced. Further, deformation and breakage of the water storage tank 2 in the soil can be prevented, and sediment hardly accumulates in the water storage tank 2 and is easily discharged. Moreover,
Since all of the bath drainage can be reused, a high water saving effect was obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a bath and wastewater reuse system in a house in which a bathroom is provided only on the first floor and a toilet is provided on the first and second floors.

FIG. 2 is a diagram showing a mechanism for guiding bathtub water inside a bathtub to a water storage tank.

FIG. 3 is a view showing a mechanism for stirring bath and drainage of a water storage tank.

FIG. 4 is a plan view showing a state where a water storage tank is buried in a space between a building and an adjacent land on the north side on a residential site.

FIG. 5 is a cross-sectional view showing a buried space of a water storage tank when the water storage tank is buried in a space between a building and a site adjacent to the site.

FIG. 6 is a plan view of a water storage tank.

FIG. 7 is a side view of the water storage tank.

FIG. 8 is a front view of a water storage tank.

[Explanation of symbols]

 A House B Wall between adjacent land C Bathroom D Toilet H Height W W Interval W1 Width 1 Bath tub 2 Water storage tank 2a Inspection opening 2b Flat surface 3.13 Wash water tank 4 Pumping pump 5.15 Toilet bowl

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadao Nimura 2-4-1 Nishitenma, Kita-ku, Osaka-shi, Osaka Sekisui Chemical Co., Ltd.

Claims (2)

[Claims] 1. Bath drainage which is drained from a bathtub is stored in a water storage tank, and when a toilet is used, the drainage from the water storage tank buried in the ground is absorbed and discharged by a water pump to be reused as toilet flush water. In the recycling system, the water storage tank is formed in a substantially cylindrical shape having a flat surface at the bottom,
Without forming irregularities on the inner surface of the water storage tank that hinder the flow of sediment, the width and height of the water storage tank should be such that the water storage tank can be embedded in a narrow space between the adjacent land boundary and the building. A water tank for a bath / water reuse system, wherein the capacity of the water tank is set to a minimum capacity at which the system functions efficiently. 2. Bath drainage which stores bath drainage drained from a bathtub in a water storage tank, absorbs and discharges the bath drainage in a water storage tank buried underground by a water pump when the toilet is used, and reuses it as toilet flushing water. In the recycling system, the water storage tank is formed in a substantially cylindrical shape having a flat surface at the bottom,
Without forming irregularities on the inner surface of the water storage tank that hinder the flow of sediment, the width and height of the water storage tank should be such that the water storage tank can be embedded in a narrow space between the adjacent land boundary and the building. A water tank for a bath water reuse system, wherein the effective capacity of the water tank is a minimum capacity capable of storing the entire amount of bath water.