JP2008121274A - Water storage tank with irrigation adjustment function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water storage tank with flow adjustment function capable of adjusting rainwater carried to rivers or sewage at the time of heavy rain and limiting the flow rate of rainwater by a simple structure to a water storage tank by providing an irrigation adjustment function. <P>SOLUTION: This water storage tank comprises a water storage tank body 1 storing rainwater, a water storage pipe 2 guiding rainwater into the storage tank body, a drain pipe 3 draining the rainwater within the storage tank when the water level within the tank body is a regulated value or more, and flow adjustment parts 4 and 5 provided within the storage tank body to guide rainwater of a regulated flow rate or less of the rainwater from the water storage pipe and flooding and guiding the rainwater exceeding the regulated flow rate into the tank body. The flow adjustment parts comprise a funnel-like member 4 receiving rainwater from the water storage pipe and flooding and falling the rainwater exceeding the regulated flow rate into the tank body and a capillary tube 5 connected to a lower portion of the funnel-like member to guide the rainwater of the regulated flow rate or less to the drain pipe. The capillary tube is connected to the drain pipe obliquely upward from the horizontal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a water storage tank that is installed around a building and can store rainwater that has fallen on the roof or surroundings of the building, and when the amount of rainfall exceeds a certain level, the rainwater is stored in the water storage tank. The present invention relates to a water storage tank with a water use adjustment function that can adjust the amount of rainwater flowing into the sewage.

In recent years, in urban areas, it has become a social problem that rainwater tends to concentrate on rivers and sewage when heavy rain falls, and flooding is likely to occur. This is thought to be because the natural water storage function has declined due to deforestation and conversion to residential land. In order to avoid floods, large-scale water tanks are being installed in the basement, etc., but it takes enormous costs and time.
In urban areas, most rainwater falls to and around buildings. Therefore, if it can be adjusted so that a part of the rainwater can be stored without flowing into the river or sewage during heavy rain, flooding in urban areas can be reduced.

  Household water storage tanks for storing rainwater are generally commercially available. However, the conventional water storage tank has only a function of storing rain water falling on the building and its surroundings, and has no water supply adjustment function in case of heavy rain.

Prior art will be described. In Patent Document 1, a rainwater flow rate controller 7 is provided in the middle of a rainwater drainage channel, and when the amount of rainfall exceeds a certain amount, rainwater is overflowed from the rainwater flow rate controller 7 and the overflowing rainwater is stored in a reservoir. A water storage tank is listed. The rainwater flow rate controller 7 of Patent Document 1 is linear, and restricts the flow rate only by the diameter of the pipe, so it is difficult to restrict it to a desired flow rate. Moreover, since the rainwater overflowed by the rainwater flow controller 7 is guided to the water storage tank via another pipe, it is necessary to route the other pipe. Furthermore, the water overflowing from the rainwater flow controller 7 also overflows to the vertical shaft 8, and it is difficult to limit the flow rate to the desired flow rate by the rainwater flow controller 7 in the configuration of Patent Document 1.
Japanese Utility Model Publication No. 7-25055

  An object of the present invention is to provide a water supply adjusting function in a water storage tank and adjust rainwater flowing into a river or sewage during heavy rain. It is another object of the present invention to provide a water storage tank having a flow rate adjustment function that can accurately limit the flow rate of rainwater with a simple configuration.

In order to solve the above problems, the present invention has the following configuration.
A water storage tank with a water supply adjusting function for storing rainwater that has fallen on the roof or surroundings of a building, the storage tank body storing rainwater, and a storage pipe that is connected to the ceiling of the water storage tank body and guides rainwater into the water storage tank And a drainage pipe connected to the upper part of the side surface of the water storage tank body, for discharging rainwater in the water storage tank body when the water level in the water storage tank body is a specified value or more, and provided in the water storage tank body. A flow rate adjusting unit that guides rainwater having a specified flow rate or less out of rainwater from the water storage pipe to the drainage pipe, and overflows rainwater in excess of the specified flow rate into the water storage tank body, The flow rate adjustment unit receives rainwater from the water storage pipe, overflows rainwater of the specified flow rate or more and drops it into the water storage tank main body, and the leakage member. A narrow pipe connected to a lower part of the member to guide rainwater of the specified flow rate or less to the drain pipe, and the narrow pipe is connected to the drain pipe obliquely upward from the horizontal. Water tank with function.

The present invention has the following embodiments.
The funnel-shaped member has a structure in which the upper part can be closed with a water stopper cap.
A dust receiving portion having a metal net disposed obliquely with respect to the water storage pipe provided in the middle of the water storage pipe, and dust connected to the water storage pipe at the dust receiving portion and caught by the dust receiving portion And a waste discharge pipe for flowing through the drain pipe.
The said water storage tank main body consists of a wooden barrel, and has a rainwater extraction faucet, a cleaning port, and a water quantity scale.

According to the configuration of the present invention, when rain falls above a certain level, rain water that falls on the building and its surroundings is stored in the water storage tank, so that the rain water flowing to the river and sewage during heavy rain is limited, and the possibility of flooding is reduced. be able to. By adopting the water storage tank of the present invention in more buildings, flooding can be prevented in advance.
In the present invention, since the narrow pipe constituting the rainwater flow rate adjusting unit is connected to the drain pipe obliquely upward from the horizontal, the flow rate of rainwater can be more accurately limited. Furthermore, since the funnel-like member and the thin tube which are the flow rate adjusting parts are in the water storage tank, the rainwater overflowing from the funnel-like member falls directly into the water tank main body, and the configuration is simple. Moreover, overflowing rainwater does not flow into the storage pipe. In the flow rate adjusting unit of the present invention, since the narrow tube is substantially horizontal, the height direction can be shorter than that in the vertical direction. Therefore, even if the flow rate adjusting unit is installed in the water tank main body, the amount of water stored in the water tank main body can be sufficiently secured.
When there is little worry about heavy rain, the funnel-shaped member is closed with a stopcock cap, so that water can be stored even if the amount of rain is small. In addition, since the dust receiving portion is disposed obliquely with respect to the water storage pipe and there is a dust discharge pipe, dust such as dead leaves flowing in from the water storage pipe can be more reliably discharged to the drain pipe.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an interior view of the present embodiment, FIG. 2 is an external view of the present embodiment, FIG. 3 is a detailed view of a flow rate adjusting unit, and FIG. 4 is a detailed view of a dust receiving unit.

  The water storage tank body 1 is made of a wooden barrel or the like, and rainwater is stored inside. Rainwater that has fallen on the roof of the building is guided to the water storage pipe 2 through a fence or the like. The water storage pipe 2 is connected to the ceiling of the water storage tank body 1 and led to the inside of the water storage tank body 1. The drain pipe 3 is for flowing rainwater into a drain pipe such as sewage. The drain pipe 3 is connected to the upper part of the side surface of the water tank main body 1 and led to the inside of the water tank main body 1. When the amount of water stored in the water storage tank body 1 exceeds a certain level, overflow water flows into the drainage pipe 3. The water storage tank body 1 is provided with a rainwater extraction faucet, a cleaning port, a water volume scale, and the like.

  The flow rate adjustment unit includes a funnel-shaped member 4 and a thin tube 5. Rainwater flowing from the water storage pipe 2 is guided to the funnel-shaped member 4 in the water storage tank body 1. A thin tube 5 is provided below the funnel-shaped member 4, and the thin tube 5 is connected to the drain pipe 3 obliquely upward. By configuring in this way, accurate flow rate control becomes possible. When the flow rate from the water storage pipe 2 is equal to or less than the specified amount, the narrow pipe 5 can pass almost all of the rainwater, and the rainwater that has passed is discharged to the sewage through the drainage pipe 3. When the flow rate from the water storage pipe 3 exceeds the specified amount, the capacity of the thin tube 5 is exceeded, and the excess rainwater overflows from the funnel-shaped member 4. Since the funnel-shaped member 4 is in the water tank main body 1, the overflowing rainwater falls into the water tank main body 1 as it is and is stored.

  A dust receiving portion 7 is provided in the middle of the water storage pipe 3. The dust receiving portion 7 is made of a stainless steel net that is provided obliquely with respect to the water storage pipe 2. Furthermore, in order to discharge the dust received by the dust receiving portion 7, a dust discharge pipe 8 that is obliquely connected to the water storage pipe 2 is provided. Since the stainless steel net is provided obliquely with respect to the water storage pipe 2, the dust caught on the stainless steel net does not collect there and flows toward the dust discharge pipe 8. Since the other end of the waste discharge pipe 8 is connected to the drain pipe 3, the flowed waste is discharged through the drain pipe 3. With such a configuration, it becomes difficult for dust such as dead leaves to accumulate on the stainless steel net, so that maintenance is easy.

The operation when it rains will be described. Rainwater that falls on the roof and surroundings of the building flows into the water storage pipe 2 through a fence or the like. Rainwater in the water storage pipe 2 is guided to a funnel-shaped member 4 in the water storage tank body 1. When the amount of rainfall is small, almost all the rainwater can be passed through the narrow tube 5, so that the rainwater from the water storage pipe 2 flows directly into the discharge pipe 3. When the amount of rainfall exceeds a certain level, the flow rate of rainwater from the water storage pipe 2 exceeds a specified value, and the narrow tube 5 cannot pass rainwater that exceeds the specified value. The rainwater exceeding the specified flow rate overflows from the funnel member 4 and is stored in the water storage tank body 1. Therefore, when the rainfall exceeds the specified flow rate, the rainwater flowing to the sewage through the drain pipe 3 is restricted, and a part of the rainwater is stored in the water storage tank main body 1, so that the risk of flooding is reduced.
When there is little concern about heavy rain, all of the rainwater from the water storage pipe 2 can be stored in the water storage tank body 1 by closing the funnel-shaped member 4 with a water stopper cap 6. When heavy rain is likely to come, rainwater in the water tank main body 1 is taken out from the faucet and the water tank main body 1 is emptied in advance, and the stop cock cap 6 is removed to prepare for heavy rain.

  5 and 6 are installation examples of water storage tanks. FIG. 5 is an example in which the water storage tank is installed on the foundation concrete. Fix the water storage tank on the foundation concrete using L-shaped metal fittings. The foundation concrete has a concave portion under the rainwater extraction faucet of the water storage tank, so that a bucket or the like can be easily placed under the rainwater extraction faucet. FIG. 6 is an example in which a water storage tank is installed on a sleeper. Since the sleepers are assembled in the shape of a well, a recess is formed under the rainwater extraction faucet, and a bucket or the like can be easily placed under the rainwater extraction faucet as in FIG. By installing the water storage tank by the method of the installation example of FIG. 5 or FIG. 6, it is more stable than installing the water storage tank directly on the ground, and it is possible to prevent the water storage tank from falling in the event of an earthquake or the like.

An example of the experimental results is shown below. Assuming that the area of the roof receiving rain is 50 square meters, when the amount of water equivalent to the rainfall is poured from the top of the storage pipe 2, the time until the 180 liter storage tank body 1 is full is as follows: It is.

(Table 1) Diameter of narrow tube 5 = 20 mm
Precipitation time Time until full tank 10mm Unable to store 20mm Unable to store 30mm 0.71 hours 40mm 0.24 hours 50mm 0.14 hours 60mm 0.10 hours 70mm 0.08 hours 80mm 0.07 hours 90mm 0.06 Time 100mm 0.05 hours * If the rainfall exceeds 25mm, overflow occurs and rainwater is accumulated.

(Table 2) Diameter of narrow tube 5 = 25 mm
10mm Cannot store 20mm Cannot store 30mm Cannot store 40mm 4.23 hours 50mm 0.33 hours 60mm 0.17 hours 70mm 0.12 hours 80mm 0.09 hours 90mm 0.07 hours 100mm 0.06 hours ※ Rainfall is 39mm If it exceeds, overflow will occur and rainwater will accumulate.

Thus, it can be seen that rainwater is accumulated only when the amount of rainfall exceeds a certain level. Further, by changing the diameter of the narrow tube 5, it is possible to adjust the amount of rainfall that causes overflow. Furthermore, the time until the water tank main body 1 becomes full can be adjusted by changing the capacity of the water tank main body 1 or adjusting the roof area per water tank.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to this, and it goes without saying that various modifications can be made within the scope of the technical idea described in the claims. Yes.

Inside view of a water storage tank with water use adjustment function External view of water storage tank with water use adjustment function Detailed view of flow rate adjustment unit Detailed view of the garbage receiver Example of installation on foundation concrete Example of installation on sleepers

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water storage tank body 2 Water storage pipe 3 Drainage pipe 4 Funnel-shaped member (flow rate adjustment part)
5 Narrow tube (flow rate adjustment part)
6 Stopcock cap 7 Dust receiving part 8 Dust discharge pipe

Claims (4)

A water storage tank with a water adjustment function that stores rainwater that has fallen on the roof or surroundings of the building,
A storage tank body for storing rainwater,
A water storage pipe connected to a ceiling portion of the water storage tank body and guiding rainwater into the water storage tank;
A drainage pipe connected to the upper part of the side surface of the water storage tank body, and for discharging rainwater in the water storage tank body when the water level in the water storage tank body is a specified value or more,
A flow rate that is provided in the water storage tank main body, guides rainwater having a specified flow rate or less out of the rainwater from the water storage pipe to the drainage pipe, and overflows rainwater in excess of the specified flow rate to be led into the water storage tank main body. An adjustment unit,
The flow rate adjustment unit is connected to a lower part of the funnel-shaped member that receives rainwater from the water storage pipe, overflows rainwater of the specified flow rate or more and drops into the water tank main body, and is below the specified flow rate. And a narrow tube for guiding rainwater to the drainage pipe,
A water storage tank with a water use adjusting function, wherein the narrow pipe is connected to the drain pipe obliquely upward from the horizontal.   The water tank with a water supply adjusting function according to claim 1, wherein the funnel-shaped member has a structure in which an upper portion can be closed by a water stopcock cap. A dust receiving part having a metal net disposed obliquely with respect to the water storage pipe, provided in the middle of the water storage pipe;
A dust discharge pipe connected to the water storage pipe at the dust receiving portion, and flowing the waste caught on the dust receiving portion to the drain pipe;
The water storage tank with water use adjusting function according to claim 1 or 2, further comprising:   4. The water storage tank with a water supply adjusting function according to claim 1, wherein the water storage tank main body is made of a wooden barrel and has a rainwater extraction faucet, a cleaning port, and a water volume scale.