JP2714347B2 - Building drainage system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building drainage system for draining rainwater flowing into a building site.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram showing a conventional building drainage system. In the conventional building drainage system, a rainwater tank 51 is provided in the site A of the building 50, and one end of a drainage piping system 52 is connected to the rainwater tank 51. The other end of the piping system 52 is connected to a drainage basin 53 laid in the same site A, and the drainage basin 53
Is connected to a sewer main pipe 55 via a drain pipe 54.
Further, a drainage pump 56 is connected to one end of the piping system 52.

[0003] In the conventional building drainage system having the above-described configuration, the rainwater that has fallen into the site A is drained by the drainage basin 53.
Alternatively, it flows into the rainwater tank 51. Here, the rainwater flowing into the drainage basin 53 is drained to the sewage main pipe 55 through the drainage pipe 54. Also,
The rainwater collected in the rainwater tank 51 is pumped to the drainage basin 53 via the piping system 52 by the activation of the drainage pump 56, and further drained from the drainage basin 53 to the sewage main pipe 55 via the drainage pipe 54. Has become.

[0004]

The rainwater tank 51
The processing capacity of the drain pump 56 for pumping rainwater from the drainage basin 53 to the drainage basin 53 is set to a specified level or less, due to restrictions on the amount of drainage to the drain 55 per unit time. However, when a torrential rain or the like occurs, the processing capacity of the drainage pump 56 is insufficient for the inflow of the rainwater into the rainwater tank 51, whereby the rainwater overflows from the rainwater tank 51,
A large amount of rainwater overflows the sewage main 55, and the drainage treatment from the drainage basin 53 to the sewage mains 55 becomes impossible. In some cases, there is a risk that the building facility will be damaged by flooding. Particularly, in a facility having an underground, equipment and the like, which are important for the function of the building, are often installed under the ground, and there is a risk that the building function and the urban function may fall into a paralysis state due to the flood damage.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a building drainage system capable of efficiently draining rainwater excessively flowing into a rainwater tank outside a site. I have.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and has a rainwater tank installed on the premises of a building and a drain connected to a sewer main via a drain. A basin, a first piping system having one end connected to a rainwater basin and the other end connected to a drainage basin, and a second piping system connected at one end to a rainwater basin and the other end facing out of the building site. Piping system and the first
And a drain drive source for draining rainwater flowing into the rainwater tank via at least one of the piping system and the second piping system.

[0007]

In the building drainage system of the present invention, when a torrential rain or the like occurs, the rainwater flowing into the rainwater tank is drained to the sewage main line via the first piping system by activating the drainage driving source. Is drained out of the premises of the building via the second piping system. In addition, when the sewage mains becomes full due to concentrated torrential rain or the like, the rainwater flowing into the rainwater tank does not pass through the first piping system due to the activation of the drainage drive source, and the second piping system does not. Drained off the premises.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a first embodiment of a building drainage system according to the present invention. In the building drainage system of the first embodiment, a rainwater tank (including a spring water tank) 11 is provided in the site A of the building 10, and one end of a first piping system 12 is connected to the rainwater tank 11. ing. The other end of the first piping system 12 is connected to the building 10.
Is connected to the drainage basin 13 laid in the site A.
The drainage basin 13 is connected to a sewage main pipe 15 through a drainage pipe 14.
It is connected to the.

On the other hand, one end of a second piping system 16 is connected to the rainwater tank 11 together with the first piping system 12. The other end of the second piping system 16 is connected to the site A of the building 10. It is located facing out. In addition, the first piping system 12
A first drain pump 17 and a second drain pump 18 which are drain drive sources are connected to the second piping system 16 and the second piping system 16, respectively.

In addition, a seawall 19 is provided at the boundary of the site A of the building 10, and the seawall 19 serves to prevent the inflow of rainwater from the outside. Water level sensors 20 and 21 are provided near the seawall 19 and inside the rainwater tank 11, respectively. The detection signal of each water level sensor 20, 21 is taken into the control unit 22,
Based on this detection signal, the control unit 22 controls the first
And the second drain pump 18 is driven and controlled.

Next, the operation of the building drainage system of the first embodiment will be described. First, the rainwater that has poured into the site A flows into the drainage basin 13 and is drained to the sewage main pipe 15 via the drainage pipe 14 or flows into the rainwater tank 11. Usually, the rainwater thus collected in the rainwater tank 11 is
The activation of the first drain pump 17 causes the first piping system 17
The water is pumped to the drainage basin 13 via the drainage basin 13 and further drained from the drainage basin 13 to the sewage main pipe 15 via the drainage pipe 14.

On the other hand, when the water level outside the site A rises abnormally due to heavy rain, etc., rainwater flows into the site A, the sewage main pipe 15 becomes full, or the first drain pump 17 If the water level of the rainwater tank 11 rises abnormally due to insufficient treatment capacity of the rainwater tank 11 as follows.
Rainwater that has flowed into the area is drained.

That is, when the water level outside the site A rises abnormally and rainwater flows into the site A, the water level sensor 20
Receiving the detection signal of the second drain pump 18
Start As a result, the rainwater flowing into the rainwater tank 11 is drained to the sewage main pipe 15 via the first piping system 12 and is also drained outside the site A via the second piping system 16. Further, when the sewage main pipe 15 becomes full and the drainage from the drainage tub 13 to the sewage main pipe 15 becomes impossible, the control unit 22 receives the detection signal of the water level sensor 21 and the second drainage. The pump 18 is started. Thereby, rainwater tank 1
The rainwater flowing into 1 is drained out of the site A via the second piping system 16 by the driving of the second drainage pump 18 without passing through the first piping system 12. Further, when the processing capacity of the first drain pump 17 is insufficient, the control unit 22 activates the second drain pump 18 in response to the detection signal of the water level sensor 21. As a result, the rainwater flowing into the rainwater tank 11 is drained to the sewage main pipe 15 via the first piping system 12 and is also drained outside the site A via the second piping system 16. When the water level of the rainwater tank 11 can be maintained at the normal level only by the processing capacity of the first drain pump 17, the control unit 22 stops the second drain pump 18 and stops the second piping system 16. Stop draining water.

Incidentally, in the configuration of the first embodiment, the rainwater tank 11 provided on the site A of the building 10 may also serve as a fire prevention water tank. In such a case, the second drainage pump 18 is used. The booster pump for water sampling can be diverted. However, the second drain pump 18
When the booster pump for water sampling is diverted to, if a fire or the like occurs during the operation of the second drain pump 18 due to heavy rain or the like, the second drain pump 18 must be stopped once. Since a fire hose cannot be connected to the second piping system 16, a control circuit for automatically stopping the second drain pump 18 in response to a fire notification signal is provided, or the second drain pump is manually operated. It is necessary to provide a means for stopping the pump 18.

Next, another embodiment of the building drainage system according to the present invention will be described. The following embodiments will be described by focusing on differences from the first embodiment. FIG. 2 is a schematic configuration diagram showing a second embodiment of the building drainage system according to the present invention. In the building drainage system of the second embodiment, the first piping system 12 and the second piping system 16
They are connected via 3, 24. And rainwater tank 11
The drainage pump 25, which is a drainage drive source, is connected to one end of the first piping system 12 and the second piping system 16 connected to each other after the connection.

In the building drainage system of the second embodiment having the above-described configuration, the control unit 22 normally operates the one open / close valve 23 while monitoring the detection signals of the water level sensors 20 and 21.
To an open state and the other open / close valve 24 to a closed state,
The drain pump 25 is started. Thereby, rainwater tank 11
The rainwater flowing into the basin is pumped to a drainage basin 13 via a first piping system 12, and further drained from the drainage basin 13 to a sewage main pipe 15 via a drainage pipe 14.

On the other hand, when the sewage main pipe 15 becomes full due to a torrential rain or the like, the water level sensors 20, 21
In response to the detection signal, the control unit 22 closes one open / close valve 23 and opens the other open / close valve 24 to activate the drain pump 25. As a result, the rainwater flowing into the rainwater tank 11 does not pass through the first piping system 12 but passes through the second piping system 16 to the site A of the building 10.
Drained outside.

FIG. 3 is a schematic diagram showing a third embodiment of the building drainage system according to the present invention. The third embodiment is different from the first embodiment in that the second drain pump 18
This is an example in which a so-called fire pump such as a booster pump for water sampling, a sprinkler pump, or a foam digestion pump is diverted. Here, a case in which a sprinkler pump is diverted will be described.

In the building drainage system according to the third embodiment, a rain water tank 11 and a fire extinguishing water tank 26 are provided in the site A of the building 10. The first piping system 12 has one end connected to the rainwater tank 11 and the other end connected to the drainage basin 13. A drain pump 27 (a drain drive source) is connected to one end of the first piping system 12. On the other hand, the second piping system 16 also uses the sprinkler pump 28 and part of the piping from the sprinkler pump 28 to the water sampling port as the sprinkler equipment. The second piping system 16 includes portions 33 and 34 that also serve as the sprinkler equipment, and a branch pipe 35 on the way from the sprinkler pump 28 to the water sampling port.
, A pipe 36 for connecting the sprinkler pump 28 and the rainwater tank 11, and an on-off valve 2
9, 30.

In the building drainage system of the third embodiment having the above structure, the control unit 22 normally opens the open / close valve 32 while monitoring the detection signals of the water level sensors 20 and 21, and opens the other open / close valve. With 29 and 30 closed,
Only the drain pump 27 is started. As a result, the rainwater flowing into the rainwater tank 11 is pumped to the drainage basin 13 via the first piping system 12, and is further discharged from the drainage basin 13 to the drainage pipe 14.
The water is drained to the sewage main pipe 15.

On the other hand, when the sewage main pipe 15 becomes full due to heavy rain, etc., the control unit 22 receives the detection signal of the water level sensor 21, opens the open / close valves 29, 30 and opens the other valves. With the on-off valve 32 closed, the sprinkler pump 28 is started. As a result, the rainwater flowing into the rainwater tank 11 is drained out of the site A of the building 10 through the second piping system 16 without passing through the first piping system 12. When the drainage capacity of the drainage pump 27 becomes insufficient due to a heavy rainfall or the like, the control unit 22 receives the detection signal of the water level sensor 21 and opens the open / close valves 29 and 30 and closes the other open / close valves 32. As the state, drainage pump 2
7 and the sprinkler pump 28 is started. As a result, the rainwater flowing into the rainwater tank 11 is drained to the sewage main pipe 15 via the first piping system 12, and is drained outside the site A of the building 10 via the second piping system 16. .

By the way, in consideration of a situation in which a fire or the like occurs while the sprinkler pump 28 is being started due to a torrential downpour, etc., the fire opening / closing valves 29 and 30 are automatically closed upon receiving a fire notification signal. It is necessary to provide a control circuit capable of switching the open / close valve 32 to an open state in advance, and to configure the entire system so that the sprinkler can operate in a normal state.

[0023]

As described above, according to the present invention,
When an emergency such as torrential rain occurs, the rainwater flowing into the rainwater tank is drained out of the building premises through the first piping system and the second piping system by the activation of the drainage drive source. Even if the sewage mains become full, rainwater is drained out of the premises through the second piping system without passing through the first piping system, so that the rainwater in the premises is lower than in the conventional system. Water can be efficiently drained, which can prevent inundation damage to the site and buildings, and ensure the safety of building facilities and building facilities as urban facilities against heavy rain, etc. improves.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a building drainage system according to the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of the building drainage system according to the present invention.

FIG. 3 is a schematic configuration diagram showing a third embodiment of a building drainage system according to the present invention.

FIG. 4 is a schematic configuration diagram showing a conventional building drainage system.

[Explanation of symbols]

 Reference Signs List 10 Building 11 Rainwater tank 12 First piping system 13 Drainage basin 14 Drainage pipe 15 Sewage main pipe 16 Second piping system 17 First drainage pump (drainage drive source) 18 Second drainage pump (drainage drive source) A site

Claims (1)

(57) [Claims] 1. A rainwater tank installed on the site of a building, a drainage basin connected to a sewer main pipe through a drainage pipe, and one end connected to the rainwater tank and the other end connected to the drainage basin. A first piping system, a second piping system having one end connected to the rainwater tank and the other end disposed outside the building site, and the first piping system and the second piping. A drainage drive source for draining rainwater flowing into the rainwater tank via at least one of the systems.