JP6569029B1 - Underground water tank installed in the basement of buildings, etc. - Google Patents

Abstract

An underground water storage tank for temporarily storing water overflowing from a gutter is provided. An underground water storage tank (20) for storing water overflowing from a gutter installed in a basement of a building or the like, wherein a first pipe (21) for guiding water in the gutter (40) to the underground water storage tank (20), Water is stored through an electric valve 24 that opens and closes one pipe 21, a water level sensor 25 that detects the level of water stored in the underground water tank 20, and a second pipe 22 that is connected to the middle of the first pipe 21. And a control unit 30 for controlling the electric valve 24 and the submersible pump 26. In the control by the control unit 30, the stored water level detected by the water level sensor 25 is a threshold value. The process which closes the electrically-driven valve 24 when exceeding is included. It can reduce the flooding of roads and inundation of houses during typhoons and heavy rains. [Selection] Figure 1

Description

  The present invention is a water storage tank that temporarily stores water overflowing from a ditch when heavy rain occurs, and is an underground water storage tank installed in a basement of a building or the like.

In Japan, typhoons and torrential rains have frequently occurred in recent years, and there are increasing cases where roads are flooded due to rainwater exceeding the drainage capacity of the side ditches of roads, and neighboring houses are inundated.
Such a situation can be greatly improved by increasing the drainage capacity of road drains and drainage pipes, but such measures have not progressed easily due to problems such as a lack of local government budget and restrictions on road width.

Patent Document 1 below proposes to provide a water tank for storing water overflowing from a gutter of a road in a basement such as a parking lot, a park, or a garden. In this underground water tank, the side surface and the bottom surface except the upper surface are formed of a water-permeable sheet having a plurality of water-permeable holes. On the top surface, there are an overflow pipe that guides the overflow of the gutter to the underground water tank, piping for using the water stored in the underground water tank for car washing, etc., and a metal or concrete lid that closes the upper surface is placed .
The water stored in this underground water tank penetrates into the ground through the water flow sheet. The water remaining in the groundwater tank can be used for washing cars and watering plants.

JP 2009-52366 A

However, in an urban area where houses are densely packed, it is difficult to secure a space for installing such a groundwater tank.
Conventional self-defense measures against typhoons and torrential rains are to prevent rainwater from entering the building by building sandbags around the building or installing protective walls. However, as a result, the water removed by the sandbag or the protective wall flows downstream, so that the amount of water on the downstream road increases and the damage on the downstream side increases.

  The present invention has been made in consideration of such circumstances, and is intended to provide a water storage tank that temporarily stores water overflowing from a gutter and is provided in the basement of a building or the like. .

The present invention is an underground water storage tank for storing water overflowing from a gutter installed in a basement of a building or the like, wherein the first piping for guiding the water in the gutter from the gutter to the underground water storage tank, An electric valve that opens and closes the pipe, a water level sensor that detects the level of the water stored in the underground water tank, and a submersible pump that discharges the water to the side groove via a second pipe that is connected to the middle of the first pipe. A control unit that controls the electric valve and the submersible pump, and the control by the control unit includes a process of closing the electric valve when the water level of the water stored by the water level sensor exceeds a threshold value. Features.
This underground water tank can open an electric valve when water overflows from the gutter, and can store the overflowing water. When the water level stored in the underground water tank exceeds the upper limit, the electric valve is automatically closed to stop the inflow of water. When the water level in the gutter falls, the submersible pump can be switched on to return the water stored in the underground water tank to the gutter.

In the underground water storage tank of the present invention, the control unit controls to open the electric valve when the detection value of the side groove water level sensor that detects the water level of the side groove exceeds a threshold value.
When the water level in the gutter exceeds the threshold, the water in the gutter automatically flows into the underground water tank, and the inflow automatically stops when the underground water tank becomes full.

Moreover, in the underground water storage tank of the present invention, an electromagnetic three-way valve is arranged in the middle of the second pipe, and the electromagnetic three-way valve allows the water discharged by the submersible pump to be stored between the second pipe and the first pipe. You may make it switch to the flow path which returns to a side groove through a connection location, and the flow path sent to an external faucet through the branch pipe branched from 2nd piping.
By sending the stored water to an external faucet, the water discharged from the faucet can be used for watering, car washing, and greening.

The underground water storage tank of the present invention can reduce damage from flooding of roads and houses during typhoons and heavy rains. This mitigation can reduce the danger of people downstream, not only near the building where the underground water tank is installed, but also downstream.
Also, in the event of a typhoon or heavy rain, water overflowing from the gutter automatically flows into the underground water tank, and when the underground water tank becomes full, the inflow automatically stops, so no manual operation is required.

The figure which shows the underground water tank which concerns on embodiment of this invention Diagram showing an example of a submersible pump Diagram explaining operation of electromagnetic three-way valve Diagram showing an example of a water level sensor Diagram showing the configuration of the control panel Flow chart showing operation procedure of control unit Diagram showing bubble joint that fits into piping opening

FIG. 1 schematically shows an underground water tank according to an embodiment of the present invention.
The underground water tank 20 is formed using an underground pit of the building 10.
In this underground water storage tank 20, the water overflowing from the gutter 40 of the road 50 is temporarily stored. The accumulated water is returned to the side groove 40 when the water level of the side groove 40 is lowered, or is discharged from the outer faucet 28 and used for watering or car washing. In order to realize such a flow of water, the first pipe 21 that guides the water in the side groove 40 into the underground water storage tank 20, the second pipe 22 connected in the middle of the first pipe 21, and the middle of the second pipe 22 A branch pipe 23 that is branched and guides water to the faucet 28 is piped.

In addition, an electric valve 24 that opens and closes the first pipe 21 is disposed at the front end side of the first pipe 21 in the underground water storage tank 20, and the water stored in the underground water tank 20 is discharged to the lower end of the second pipe 22. An electromagnetic three-way valve 27 for switching the destination of water discharged by the submersible pump 26 to the first pipe 21 or the branch pipe 23 is disposed in the middle of the second pipe 22.
A water level sensor 25 that detects the water level of the stored water is disposed in the underground water tank 20.

In the side groove 40, a side groove water level sensor 42 that detects the water level in the side groove is attached to a creching 41 that closes the side groove 40.
Here, the control panel 30 for controlling the electric valve 24, the submersible pump 26 and the electromagnetic three-way valve 27 according to the detection values of the side groove water level sensor 42 and the water level sensor 25 is provided on the wall surface of the building 10. Needless to say, the installation position is not limited to this.

The electric valve 24 uses an electromagnet to move a plunger (iron piece) to open and close the valve (valve), and is widely used for opening / closing control of a fluid flow path.
As shown in FIG. 2, the submersible pump 26 has a structure in which an impeller 42 accommodated in a spiral casing 41 rotates to discharge water sucked from a suction port 49 on the lower surface of the casing 41 from a discharge opening 50. doing. Water discharged from the discharge opening 50 is sent to the second pipe 22.

As shown in FIG. 3, the electromagnetic three-way valve 27 is a flow path that conducts AB by closing one of the flow paths A, B, and C by electromagnetically driving the valve, or A A flow path that conducts −C (or B−C) can be selected.
Further, as the water level sensor 25, as shown in FIG. 4, an electrode type level meter including a plurality of electrode rods 10A to 10D can be used. In this level meter, when the electrode rod 10A and the electrode rod 10B are immersed in a liquid, the electrode rods 10A and 10B are electrically connected. Thereby, it can be detected that the water level is above the lower end of the electrode rod 10B. Further, when the electrode rod 10A and the electrode rod 10C are conducted, it can be detected that the water level is above the lower end portion of the electrode rod 10C. When the electrode rod 10A and the electrode rod 10D are conducted, the water level becomes the lower end of the electrode rod 10D. It can be detected that it is above the part. Thus, a plurality of water level levels can be measured by using one electrode rod 10A as a common electrode and detecting continuity between the electrode rod paired with the common electrode. The number of electrode bars is set according to the number of water level levels that need to be measured.
A similar electrode type level meter can also be used for the side groove water level sensor 42.

FIG. 5 shows the configuration of the control panel 30. The control panel 30 includes a rainwater use button 301 that is operated when rainwater is used, an electric valve start button 302 that is operated when the electric valve 24 is started, a submersible pump start button 303 that is operated when the submersible pump 26 is started, and an electromagnetic three-way valve 27 switching. An electromagnetic three-way valve operation button 304 that is sometimes operated is arranged, and further, the electric valve 24, the submersible pump 26, and the electromagnetic three-way valve 27 are based on the operation status of these buttons and the detection result of the water level sensor 25 or the side groove water level sensor 42. The control part (microcomputer) 300 which controls operation | movement of these is provided.
In FIG. 1, the wiring of the control panel 30, the water level sensor 25, the gutter water level sensor 42, the electric valve 24, the submersible pump 26, and the electromagnetic three-way valve 27 is not shown.

The flowchart of FIG. 6 shows the control procedure of the control unit 300.
The control unit 300 identifies whether or not the water level of the side groove 40 detected by the side groove water level sensor 42 has exceeded a first threshold value indicating a danger line in which water overflows from the side groove 40 (step 1). In the case of No, it is identified whether or not the electric valve activation button 302 has been pressed (step 2). When the water level of the side groove 40 exceeds the first threshold value or when the electric valve activation button 302 is pressed, the electromagnetic three-way valve 27 is set to the state shown in FIG. 3A (the second pipe 22 is sealed). (Step 4), the electric valve 24 is opened (Step 5).

At this time, if the water level in the side groove 40 exceeds the first threshold value, the water in the side groove 40 automatically flows into the underground water tank 20.
The controller 300 identifies whether or not the water level of the underground water tank 20 detected by the water level sensor 25 has exceeded a third threshold value indicating a full tank line of the underground water tank 20 (step 6). When the water level of the underground water storage tank 20 exceeds the third threshold value, the electric valve 24 is closed to prevent further inflow of water (step 7).

  Next, the control unit 300 identifies whether or not the water level of the side groove 40 detected by the side groove water level sensor 42 is equal to or lower than a second threshold value indicating a state where water flows stably in the side groove 40 (step 8). In the case of Yes, it is identified whether or not the rainwater utilization button 301 has been pressed (step 9). (Step 10), the submersible pump 26 is activated, and the water stored in the underground water storage tank 20 is returned to the side groove 40 through the second pipe 22 and the first pipe 21 (Step 11).

In addition, when the rainwater utilization button 301 is pressed (Yes in Step 9 and Step 12), the electromagnetic three-way valve 27 is in the state shown in FIG. 3A (the state where the branch pipe 23 is opened) regardless of the water level of the side groove 40. (Step 13), the submersible pump 26 is activated, and the water stored in the underground water storage tank 20 is sent to the external faucet 28 through the branch pipe 23 (Step 14).
In Step 13 and Step 14, when the water level of the underground water tank 20 detected by the water level sensor 25 becomes zero, the control unit 300 stops the driving of the submersible pump 26 (Step 16).

  As described above, when the underground water storage tank 20 overflows into the side groove 40, the water in the side groove 40 can be automatically taken in, and when the water in the underground water storage tank 20 reaches a certain level, The inflow of water from the side groove 40 can be automatically stopped. Furthermore, when the water level in the side groove 40 is lowered, the water stored in the underground water storage tank 20 can be automatically returned to the side groove 40.

  It is also possible for humans to take part in such automation. When a resident who heard the heavy rain weather forecast presses the electric valve activation button 302 to open the electric valve 24 of the underground water tank 20 in advance or notices that the heavy rain has passed and the water level in the gutter 40 has dropped, the submersible pump is activated. It is also possible to return the water in the underground water storage tank 20 to the side groove 40 by pressing the button 303.

Note that a bubble joint shown in FIG. 7 may be fitted to the tip of the first pipe 21 that opens in the side groove 40 so that the first pipe 21 is normally closed and opened when heavy rain is expected.
The building referred to in the present invention includes all buildings such as a house, a condominium, and a factory.
Moreover, you may provide the underground water tank 20 of this invention in a park or a public facility.

  The underground water storage tank of the present invention can be widely used in many buildings, etc., and by spreading this underground water storage tank, it is possible to reduce the damage of flooding of roads and houses due to typhoons and heavy rains. it can.

DESCRIPTION OF SYMBOLS 10 Building 20 Underground water storage tank 21 1st piping 22 2nd piping 23 Branch pipe 24 Electric valve 25 Water level sensor 26 Submersible pump 27 Electromagnetic three-way valve 28 Faucet 30 Control panel 40 Side groove 41 Creating 42 Side groove water level sensor 50 Road 300 Control part 301 Rainwater Use button 302 Electric valve start button 303 Submersible pump start button 304 Electromagnetic three-way valve operation button

Claims (3)

An underground water tank that is stored in the basement of a building or the like and stores water overflowing from a ditch.
A first pipe for guiding the water in the gutter from the gutter to the underground water tank;
An electric valve for opening and closing the first pipe;
A water level sensor for detecting the water level of the stored water stored in the underground water tank;
A submersible pump for discharging the water storage to the side groove through a second pipe connected in the middle of the first pipe;
A control unit for controlling the electric valve and the submersible pump;
With
The underground water storage tank characterized in that the control by the control unit includes a process of closing the electric valve when the water level detected by the water level sensor exceeds a threshold value. The underground water tank according to claim 1,
The said control part is controlled to open the said electric valve, when the detection value of the side groove water level sensor which detects the water level of the said side groove exceeds a threshold value, The underground water tank characterized by the above-mentioned. The underground water tank according to claim 1 or 2,
An electromagnetic three-way valve disposed in the middle of the second pipe;
The electromagnetic three-way valve is branched from the second pipe, a flow path for returning the water discharged by the submersible pump to the side groove through a connection portion between the second pipe and the first pipe. An underground water storage tank that is switched to a flow path that sends to an external faucet through a branch pipe.