JP6203646B2 - Drainage system - Google Patents

Description

  The present invention relates to a drainage system.

  Conventionally, a drainage system that discharges sewage from a drainage facility such as a toilet, a bath, or a kitchen sink to a sewage main is known. This type of drainage system includes an outflow pipe that connects the drainage facility and the sewage main. Sewage flowing out from the drainage facility is discharged to the sewer main through the outflow pipe. The sewage discharged into the sewage mains flows into a sewage treatment plant and is treated.

  By the way, when a disaster such as a large-scale earthquake or tsunami occurs, the sewage main may be damaged. If the sewage main is damaged, the sewage may not be properly treated.

  Patent Document 1 discloses an outflow pipe that connects a drainage facility and a sewage main, a storage means that stores sewage, and a flow path switching means that switches a sewage flow path so that sewage in the outflow pipe flows to the storage means. A drainage system is disclosed. In this drainage system, when the sewage main is damaged in the event of a disaster, the wastewater discharge destination is changed from the sewage main to the storage means by switching the flow path of the sewage by the flow path switching means.

Japanese Patent No. 4679412

  However, in the drainage system described in Patent Document 1, sewage from the drainage facility is discharged to the storage means at the time of a disaster, but normally, the sewage is not discharged to the storage means, and the storage means is empty. there were. In normal times, the storage means was not used.

  This invention is made | formed in view of this point, The objective is to provide the drainage system which can use a storage means effectively at the time of normal time and a disaster.

  The drainage system according to the present invention includes a rainwater inflow conduit into which rainwater flows from an upstream end, a rainwater flow path switching means connected to the downstream end of the rainwater inflow conduit, and an upstream end connected to the rainwater flow path switching means. A storm water outflow pipe connected to and connected to a drainage facility, and a sewage flow path switching means connected to the downstream end of the sewage inflow pipe; The upstream end is connected to the sewage flow path switching means, the downstream end is connected to the sewage main pipe, and the storm water flow path switching means and the sewage flow path switching means are connected to Storage means for storing. The rainwater flow path switching means can be switched between a first state in which rainwater flows from the rainwater inflow conduit to the rainwater outflow conduit and a second state in which rainwater flows from the rainwater inflow conduit to the storage means. It is configured. The sewage flow path switching means can be switched between a third state in which sewage flows from the sewage inflow pipe to the sewage outflow pipe and a fourth state in which sewage flows from the sewage inflow pipe to the storage means. It is configured.

  According to the drainage system, the rainwater flow switching unit causes the rainwater flowing into the rainwater inflow conduit to flow into the rainwater outflow conduit, and the second state to cause the rainwater flowing into the rainwater inflow conduit to flow into the storage means. You can switch to the state. In addition, the sewage flowing into the sewage main pipe through the sewage outflow pipe and the sewage flowing into the sewage inflow pipe through the sewage outflow pipe by the sewage flow switching means. Can be switched to the fourth state in which the gas flows through the storage means. Therefore, the rainwater flow path switching means and the sewage flow path switching means can appropriately select whether rainwater or sewage flows through the storage means. For example, in normal times, rainwater flows through the storage means by the rainwater flow path switching means, and wastewater flows through the sewage outflow pipe to the sewage main through the wastewater flow path switching means. On the other hand, in the event of a disaster, the rainwater flow path switching means causes rainwater to flow through the rainwater outflow pipe, and the sewage flow path switching means causes the sewage to flow to the storage means. This makes it possible to effectively use the storage means even during normal times and disasters.

  According to a preferred aspect of the present invention, the storage means is a septic tank provided with a purification means for purifying sewage.

  According to the above aspect, the sewage can be purified by the purification means in the storage means. Therefore, the purified sewage can be discharged into a river or the like.

  According to another preferable aspect of the present invention, the apparatus includes a return means for guiding the treated water purified by the purification means to the drainage facility.

  According to the above aspect, the treated water purified by the returning means is guided to the drainage facility. Therefore, the purified sewage can be reused.

  According to another preferable aspect of the present invention, the rainwater flow path switching means includes an inspection port that opens upward, a rainwater flow inlet to which a downstream end of the rainwater flow pipe is connected, and the rainwater outflow pipe. A rainwater trough body having a first rainwater outlet to which the upstream end of the storage is connected and a second rainwater outlet to which the storage means is connected; and (2) A first switching position where the rainwater inlet and the first rainwater outlet are communicated so that rainwater does not flow to the rainwater outlet, and rainwater does not flow from the rainwater inlet to the first rainwater outlet. And a rainwater switching means capable of changing a position between a second switching position where the rainwater inlet and the second rainwater outlet communicate with each other.

  Rainwater may contain foreign matter such as fallen leaves and sand, and the foreign matter may accumulate on the rainwater flow path switching means. Therefore, there is a possibility that the flow path switching function of the rainwater flow path switching means may be impaired due to foreign matter. However, according to the said aspect, the rainwater flow-path switching means is comprised by the rainwater trough which has a flow-path switching function. Since rainwater is provided with an inspection port, maintenance is easy. Therefore, when a foreign object is clogged in rainwater, the foreign object can be easily removed from the inspection port. Therefore, the flow path switching function can be sufficiently ensured, and it is easy to avoid a situation where the rainwater flow path cannot be switched.

  According to another preferred aspect of the present invention, the second rainwater outlet is provided at a position lower than the rainwater inlet and the first rainwater inlet and opens downward. The rainwater switching means is a lid that is detachably provided at the second rainwater outlet.

  According to the above aspect, when the lid is attached to the second rainwater outlet, the rainwater inlet and the first rainwater outlet are communicated, and the communication between the rainwater inlet and the second rainwater outlet is blocked. Therefore, the rainwater that has flowed into the rainwater main body from the rainwater inflow port flows out from the first rainwater outflow port and does not flow out from the second rainwater outflow port. Therefore, the rainwater that has flowed into the rainwater inflow conduit flows outside through the rainwater outflow conduit. On the other hand, when the lid is removed from the second rainwater outlet, the rainwater inlet, the first rainwater outlet, and the second rainwater outlet communicate with each other. However, the second rainwater outlet is provided at a position lower than the rainwater inlet and the first rainwater outlet. Therefore, the rainwater that has flowed into the rainwater main body from the rainwater inlet does not flow out from the first rainwater outlet, but flows out from the second rainwater outlet. Therefore, rainwater that has flowed into the rainwater inflow conduit flows into the storage means.

  According to another preferable aspect of the present invention, the sewage flow path switching means includes an inspection port that opens upward, a sewage flow inlet connected to a downstream end of the sewage inflow pipe, and the sewage outflow pipe. A sewage drain main body having a first sewage outlet to which an upstream end of the sewage is connected and a second sewage outlet to which the storage means is connected; and 2 A third switching position for communicating the sewage inlet and the first sewage outlet so that sewage does not flow to the sewage outlet, and sewage from the sewage inlet to the first sewage outlet The sewage basin is provided with sewage switching means capable of changing a position between a sewage inlet and a fourth switching position for communicating the second sewage outlet.

  The sewage discharged from the drainage facility may contain foreign matter such as toilet paper, and the foreign matter may accumulate on the sewage flow path switching means. Therefore, there is a possibility that the flow path switching function of the sewage flow path switching means may be impaired by the foreign matter. However, according to the said aspect, the sewage flow path switching means is comprised by the sewage masu which has a flow path switching function. The sewage can be easily maintained because it has an inspection port. Therefore, when the foreign matter is clogged in the sewage water, the foreign matter can be easily removed from the inspection port. Therefore, it is possible to sufficiently ensure the flow path switching function, and to easily avoid a situation where the flow path of the sewage cannot be switched.

  According to another preferable aspect of the present invention, the second sewage outlet is provided at a position lower than the sewage inlet and the first sewage outlet and opens downward. The sewage switching means is a lid that is detachably provided at the second sewage outlet.

  According to the above aspect, when the lid is attached to the second sewage outlet, the sewage inlet and the first sewage outlet communicate with each other, and the communication between the sewage inlet and the second sewage outlet is blocked. Therefore, the sewage flowing into the sewage mass body from the sewage inflow port flows out from the first sewage outflow port and does not flow out from the second sewage outflow port. Therefore, the sewage flowing into the sewage inflow pipe flows to the sewage main pipe through the sewage outflow pipe. On the other hand, when the lid is removed from the second sewage outlet, the sewage inlet, the first sewage outlet, and the second sewage outlet communicate. However, the second sewage outlet is provided at a position lower than the sewage inlet and the first sewage outlet. Therefore, the sewage flowing into the sewage mass main body from the sewage inflow port does not flow out from the first rainwater outflow port, but flows out from the second sewage outflow port. Therefore, the sewage that has flowed into the sewage inflow pipe flows into the storage means.

  According to another preferable aspect of the present invention, when the rainwater flow path switching means is switched to the second state, the dirty water flow path switching means is switched to the third state, and the rainwater flow path switching is performed. When the means is switched to the first state, the sewage flow path switching means is configured to switch to the fourth state.

  According to the above aspect, in normal times, rainwater flows into the storage means by switching the rainwater flow path switching means to the second state and switching the wastewater flow path switching means to the third state. do not do. On the other hand, in the event of a disaster, the rainwater flow switching means is switched to the first state and the sewage flow path switching means is switched to the fourth state, so that rainwater does not flow into the storage means, but sewage flows. Therefore, the storage means can be used effectively both during normal times and during disasters. In addition, even when the sewage main is damaged during a disaster, waste water can be used for the storage means, so that drainage facilities such as toilets, baths, and kitchen sinks can be used.

  According to another preferred aspect of the present invention, the storage means includes a rainwater port to which the rainwater flow path switching means is connected and a wastewater port to which the wastewater flow path switching means is connected. The rainwater outlet is provided at a position higher than the dirty water outlet.

  Dirty water is often contaminated with rain and foreign matter such as manure, and is dirty water. Therefore, when sewage flows backward from the storage means to the rainwater flow path switching means, foreign matter such as manure or the like may adhere to the rainwater flow path switching means, or a smell may be attached. However, according to the said aspect, since the rain water port of a storage means is provided in the position higher than a sewage port, the sewage of a storage means can be made difficult to flow from a rain water port to a rain water flow-path switching means.

  ADVANTAGE OF THE INVENTION According to this invention, the drainage system which can use a storage means effectively at the time of normal time and a disaster can be provided.

It is a top view of the drainage system concerning a 1st embodiment. It is a side view of the drainage system concerning a 1st embodiment. It is a top view of rainwater masu and sewage masu. It is front sectional drawing of a rainwater masu and a sewage masu. FIG. It is a top view of a lid. It is a front view of a lid. It is a side view of a lid. It is a front view of a septic tank. It is front sectional drawing of a septic tank, and is sectional drawing in the XX cross section of FIG. It is a top view of the drainage system concerning a 2nd embodiment. It is a side view of the drainage system concerning a 3rd embodiment. It is a front view of the drainage system concerning a 4th embodiment. FIG. 10 is a perspective view of another embodiment according to another embodiment. It is a top view according to another embodiment.

  Hereinafter, each embodiment of the drainage system concerning the present invention is described, referring to drawings. Each embodiment described herein is, of course, not intended to limit the present invention in particular. Further, members / parts having the same action are denoted by the same reference numerals, and redundant description is omitted or simplified.

<First Embodiment>
First, the drainage system 1A according to the first embodiment will be described. FIG. 1 is a plan view showing a drainage system 1A according to the present embodiment. Here, the left and right in FIG. 1 are the upstream side and the downstream side, respectively. The drainage system 1A is a system that discharges sewage and rainwater. Here, “sewage” is water discharged from, for example, toilets, baths, kitchen sinks, and the like, and cannot be discharged into a river as it is. On the other hand, “rainwater” is water caused by natural phenomena such as rainfall, and can be discharged into a river as it is. Here, sewage and rainwater are collectively referred to as “drainage”. As shown in FIG. 1, the drainage system 1 </ b> A includes a rainwater pipe 10, a sewage pipe 20, a stormwater basin 40 </ b> A and a sewage basin 40 </ b> B having a flow path switching function, and a septic tank 70.

  The rainwater pipeline 10 is buried in the ground. Although not specifically shown, the rainwater pipe 10 is inclined downward toward the downstream. The rainwater pipe 10 includes a rainwater inflow pipe 11 and a rainwater outflow pipe 12. Rainwater flows into the rainwater inflow conduit 11 from the upstream end. The downstream end of the rainwater inflow conduit 11 is connected to the inflow port 52A of the rainwater 40A. The rainwater outflow conduit 12 is provided on the downstream side of the rainwater inflow conduit 11. Rainwater flows out from the downstream end into the rainwater outflow pipe 12. The first outflow port 53 </ b> A of rainwater 40 </ b> A is connected to the upstream end of the rainwater outflow pipe 12, and the side groove 15 is connected to the downstream end of the rainwater outflow pipe 12. In addition, what is connected to the downstream end of the rainwater outflow pipeline 12 is not limited to the side groove 15. For example, a rainwater main pipe may be connected to the downstream end of the rainwater outflow pipe 12. Further, the downstream end of the rainwater outflow pipe 12 may be opened toward a river or the like. In the rainwater outflow pipe 12, an additional 16 for inspecting the rainwater outflow pipe 12 is provided. “Pipe” means a passage through which water flows. The “pipe” may be constituted by a single pipe, or may be constituted by a plurality of pipes and a joint connecting them.

  FIG. 2 is a side view of the drainage system 1A. As shown in FIG. 2, in this embodiment, the rainwater pipe 10 includes another rainwater outflow pipe 13 that connects the rainwater tank 40 </ b> A and the septic tank 70. The upstream end of the other rainwater outflow pipe 13 is connected to the second outlet 54 </ b> A of the rainwater mass 40 </ b> A, and the downstream end of the other rainwater outflow pipe 13 is connected to the rainwater outlet 71 of the septic tank 70. Here, the rainwater tank 40 </ b> A and the septic tank 70 are indirectly connected via another rainwater outflow pipe 13.

  The sewage pipe 20 is buried in the ground. Although not shown in particular, the sewage pipe 20 is inclined downward toward the downstream in the same manner as the rainwater pipe 10. As shown in FIG. 1, the sewage pipe 20 includes a sewage inflow pipe 21 and a sewage outflow pipe 22. The sewage flows into the sewage inflow pipe 21 from the upstream end. For example, a drainage facility 5 such as a toilet, a bath, or a kitchen sink is connected to the upstream end of the sewage inflow conduit 21. At the downstream end of the sewage inflow pipe 21, an inflow port 52B for sewage 40B is connected. The sewage outflow pipe 22 is provided on the downstream side of the sewage inflow pipe 21. The first outlet 53B of the sewage basin 40B is connected to the upstream end of the sewage outflow pipe 22, and the sewage main pipe that guides sewage to a sewage treatment plant (not shown) at the downstream end of the sewage outflow pipe 22 25 is connected. A public bowl 26 is provided in the sewage outflow pipe 22.

  Further, in the present embodiment, as shown in FIG. 2, the sewage pipe 20 is provided with another sewage outflow pipe 23 that connects the sewage basin 40 </ b> B and the septic tank 70. The second outlet 54B of the sewage basin 40B is connected to the upstream end of the other sewage outflow pipe 23, and the sewage port 72 of the septic tank 70 is connected to the downstream end of the other sewage outflow pipe 23. . Here, the sewage basin 40B and the septic tank 70 are indirectly connected through another sewage outflow pipe 23.

  Rainwater 40A is capable of switching rainwater flow paths. The rainwater basin 40A is divided into a state in which rainwater flows from the rainwater inflow conduit 11 to the rainwater outflow conduit 12 (first state) and a state in which rainwater flows from the rainwater inflow conduit 11 to the septic tank 70 (second state). It can be switched. In this embodiment, rainwater 40A corresponds to “rainwater flow path switching means”.

  FIG. 3 is a plan view of rainwater 40A. FIG. 4 is a front sectional view of rainwater 40A. FIG. 5 is a side view of the rainwater tank 40A, as viewed from the first outlet 53A side. As shown in FIG. 4, the rainwater basin 40A includes a main body 41A and a lid 42A. As shown in FIG. 5, the main body 41 </ b> A is formed in a substantially cylindrical shape whose upper part has an enlarged diameter. As shown in FIG. 4, an inspection port 51A that opens upward is formed in the upper portion of the main body 41A. First, an inflow port 52A and a first outflow port 53A are formed at the side of the main body 41A. A second outlet 54A that opens downward is formed in the lower portion of the main body 41A. As shown in FIG. 2, an inspection cylinder 56A is connected to the inspection port 51A. Here, the rainwater 40A is buried in the ground so that the upper end of the inspection cylinder 56A is arranged at substantially the same height as the ground. The operator can inspect the inside of the main body 41A through the inspection cylinder 56A. A lid 57A is arranged at the upper end of the inspection cylinder 56A. The inspection cylinder 56A is closed by a lid 57A.

  As shown in FIG. 4, the inflow port 52A is provided at the side of the main body 41A. In the present embodiment, the inflow port 52 </ b> A is a receiving port into which a pipe is inserted, but may be a differential port that is inserted into the pipe. As shown in FIG. 1, the rainwater inflow conduit 11 is connected to the inflow port 52A as described above. In this embodiment, a pipe (not shown) that forms a part of the rainwater inflow conduit 11 is directly connected to the inflow port 52A. However, the above-mentioned pipe is indirectly connected to the inflow port 52A via another member. May be connected to each other.

  As shown in FIG. 4, the first outlet 53A is disposed on the side of the main body 41A and on the side opposite to the inlet 52A. In the present embodiment, the first outlet 53A is a receiving port, but the first outlet 53A may be an outlet. As shown in FIG. 1, as described above, the rainwater outflow pipe 12 is connected to the first outlet 53A. The first outlet 53 </ b> A may be directly connected to a pipe that forms a part of the rainwater outflow pipe 12, or the pipe may be indirectly connected via another member.

  As shown in FIG. 4, the second outlet 54A is provided at the lower portion of the main body 41A and opens downward. The second outlet 54A is provided at a position lower than the inlet 52A and the first outlet 53. The second outlet 54A is disposed between the inlet 52A and the first outlet 53A in plan view. The second outlet 54A is provided below the inspection port 51A. As shown in FIG. 2, as described above, another rainwater outflow pipe 13 is connected to the second outlet 54A. The septic tank 70 is indirectly connected to the second outlet 54 </ b> A via another rainwater outflow pipe 13. The septic tank 70 may be directly connected to the second outlet 54A.

  As shown in FIG. 4, the lid 42A is a member that switches the flow path of rainwater in the main body 41A. In the present embodiment, the lid 42A corresponds to “rainwater switching means”. The lid body 42A has a switching position (first switching position) for connecting the inlet 52A and the first outlet 53A so that rainwater does not flow from the inlet 52A to the second outlet 54A, and a first position from the inlet 52A. The position can be changed between a switching position (second switching position) where the inflow port 52A and the second outflow port 54A are communicated so that rainwater does not flow to the first outflow port 53A. The lid body 42A is detachably provided at the second outlet 54A. When the lid 42A is attached to the second outlet 54A (first switching position), the second outlet 54A is closed. When the lid body 42A is removed from the second outlet 54A (second switching position), the second outlet 54A is opened. The lid body 42A is disposed below the inspection port 51A so that the lid body 42A can be easily removed from the ground surface through the inspection cylinder 56A. FIG. 6 is a plan view of the lid body 42A. FIG. 7 is a front view of the lid body 42A. FIG. 8 is a side view of the lid body 42A. As shown in FIG. 7, the lid body 42A includes a lid main body 61A, a handle 62A, and a fitting convex portion 63A.

  As shown in FIG. 6, the lid body 61A includes a bottom surface 65A that forms a flow path that connects the inflow port 52A to the first outflow port 53A. As shown in FIG. 8, the bottom surface 65A is formed in a substantially C-shaped cross section so as to be smoothly continuous with the bottom surface of the inflow port 52A and the bottom surface of the first outflow port 53A. As shown in FIG. 6, the handle 62A is provided on the lid body 61A so as to extend upward from the upper end of the lid body 61A. As shown in FIG. 8, the handle 62 </ b> A is formed in a cross-sectional C shape. As shown in FIG. 7, the fitting convex portion 63 </ b> A is a portion that can be fitted to the second outlet 54 </ b> A so as to close the second outlet 54 </ b> A. The fitting convex portion 63A is substantially cylindrical. In the present embodiment, a rubber seal member 64A is provided on the outer peripheral portion of the fitting convex portion 63A. By this seal member 64A, a seal between the second outlet 54A and the fitting convex portion 63A of the lid body 42A is achieved.

  The sewage masu 40B is a sewage channel that can be switched. As shown in FIG. 1, the sewage basin 40B is in a state in which sewage flows from the sewage inflow conduit 21 to the sewage outflow conduit 22 (third state) and a state in which sewage flows from the sewage inflow conduit 21 to the septic tank 70 ( The fourth state can be switched to. In the present embodiment, the sewage basin 40B corresponds to “sewage flow path switching means”.

  In the present embodiment, the sewage basin 40B has the same configuration as the rainwater basin 40A, and a detailed description thereof will be omitted as appropriate. In FIGS. 3 to 8, the same part as the part of the rainwater 40A in the sewage basin 40B is denoted by a symbol in which “A” at the end of each part of the rainwater basin 40A is changed to “B”. ing. However, the configurations of the rainwater trough 40A and the sewage trough 40B are not necessarily the same, and may be different.

  A pipe (not shown) that forms a part of the sewage inflow conduit 21 is directly connected to the inlet 52B of the sewage basin 40B. However, the pipe is indirectly connected to the inlet 52B via another member. It may be connected. A pipe that forms part of the sewage outflow pipe 22 may be directly connected to the first outlet 53B of the sewage basin 40B, or the pipe may be indirectly connected through another member. . The lid 42B of the sewage masu 40B corresponds to “sewage switching means”. The lid body 42B has a switching position (third switching position) for connecting the inlet 52B and the first outlet 53B so that sewage does not flow from the inlet 52B of the wastewater 40B to the second outlet 54B. The position can be changed between a switching position (fourth switching position) where the inlet 52B and the second outlet 54B are communicated so that sewage does not flow from the inlet 52B to the first outlet 53B. When the lid 42B is attached to the second outlet 54B (third switching position), the second outlet 54B is closed. When the lid body 42B is removed from the second outlet 54B (fourth switching position), the second outlet 54B is opened.

  An identification means may be provided at the inspection port 51A of the rainwater 40A and the inspection port 51B of the sewage 40B. This identification means is a means for making it easy to find where the rainwater 40A and the sewage 40B are located. By providing the identification means, it is possible to easily find where the inspection ports 51A and 51B are located even in the dark, for example. It is possible to distinguish between 40A of rainwater and 40B of sewage and the other. Here, as identification means, lids 57A and 57B arranged at the upper ends of inspection tubes 56A and 56B (see FIG. 2) connected to inspection ports 51A and 51B and / or the upper ends of inspection tubes 56A and 56B. (See FIG. 2), the colors applied to the other portions of the rainwater basin 40A and the sewage basin 40B are easily distinguished. The color used in the identification unit is not particularly limited, but is yellow, for example. The color may be a fluorescent color. For example, the fluorescent paint may be applied to the upper ends of the inspection tubes 56A and 56B and / or the lids 57A and 57B. However, the identification means is not limited to the above-described color.

  The septic tank 70 is a tank that stores rainwater that flows into the rainwater inflow conduit 11 and sewage that flows into the sewage inflow conduit 21. In the present embodiment, the septic tank 70 corresponds to a “storage unit”. FIG. 9 is a front view of the septic tank 70. FIG. 10 is a front sectional view of the septic tank 70, which is a sectional view taken along the line XX of FIG. As shown in FIG. 9, the septic tank 70 is buried in the ground. As shown in FIG. 10, the septic tank 70 is constituted by a tank. The septic tank 70 has a space sealed inside. In the upper part of the side surface of the septic tank 70, a rain water port 71 and a sewage port 72 are formed. The rain water port 71 and / or the sewage port 72 may be formed on the upper surface of the septic tank 70. The rain water port 71 is provided at a position higher than the dirty water port 72. For example, the rainwater port 71 is provided at a position higher than the sewage port 72 by the length of the sewage port 72 in the height direction. However, the rainwater port 71 may be provided at substantially the same height as the sewage port 72, or may be provided at a position lower than the sewage port 72. As shown in FIG. 2, as described above, the rainwater outlet 71 is connected to the second outlet 54 </ b> A of the rainwater 40 </ b> A via the other rainwater outflow pipe 13. The second outlet 54 </ b> B of the wastewater 40 </ b> B is connected to the sewage outlet 72 via another sewage outflow pipe 23.

  The septic tank 70 is a tank capable of purifying dirty water. The septic tank 70 is provided with a purification means for purifying sewage. Although the purification means is not particularly limited, in the present embodiment, the purification means is a microorganism introduced into the purification tank 70. The septic tank 70 is a tank that purifies the sewage by removing foreign substances contained in the sewage by the microorganisms and decomposing the dirt of the sewage. For example, the septic tank 70 includes the following tanks. As shown in FIG. 10, the inside of the septic tank 70 is divided into three tanks from the upstream side to the downstream side by two partition walls 73 rising from the side surface and the bottom surface. The septic tank 70 includes an anaerobic tank 74, an aerobic tank 75, and a settling tank 76, which are three tanks.

  The anaerobic tank 74 is a tank for anaerobically treating sewage, and is provided at the most upstream portion in the septic tank 70. The anaerobic tank 74 is provided with an anaerobic filter bed (not shown) holding anaerobic microorganisms. In the anaerobic tank 74, foreign substances contained in the sewage are removed, and the sewage is decomposed by anaerobic microorganisms that do not require oxygen to purify the sewage. Here, the anaerobic tank 74 has holes (not shown) for introducing anaerobic microorganisms. Through this hole, anaerobic microorganisms can be introduced into the anaerobic tank 74, or the anaerobic microorganisms can be removed from the anaerobic tank 74.

  The aerobic tank 75 is an aerobic tank for treating sewage, and is provided between the anaerobic tank 74 in the septic tank 70 and the settling tank 76. A large number of fluid carriers (not shown) holding aerobic microorganisms are accommodated in the aerobic tank 75 so as to be able to flow together with sewage. The aerobic tank 75 is provided with a pump (not shown) that feeds air into the aerobic tank 75. In the aerobic tank 75, the sewage flowing into the aerobic tank 75 from the anaerobic tank 74 and the air sent from the pump are mixed. The sewage is further purified by aerobic microorganisms that require oxygen. Here, in the aerobic tank 75, an aerobic microorganism introduction hole (not shown) is formed. Through these holes, aerobic microorganisms can be introduced into the aerobic tank 75, or aerobic microorganisms can be removed from the aerobic tank 75.

  The sedimentation tank 76 is provided in the most downstream part in the septic tank 70. The sedimentation tank 76 is a tank that precipitates solids contained in the sewage purified by the aerobic tank 75. In the present embodiment, the sewage flowing into the septic tank 70 is purified by sequentially passing through the anaerobic tank 74, the aerobic tank 75, and the sedimentation tank 76.

  In this embodiment, when sewage is stored in the septic tank 70, the septic tank 70 is used as a tank for purifying sewage. However, when rainwater is stored in the septic tank 70, the septic tank 70 stores rainwater. It is used as a simple rainwater tank for storage. When the septic tank 70 is used as a mere rainwater tank, if anaerobic microorganisms or aerobic microorganisms are introduced therein, the anaerobic microorganisms or aerobic microorganisms are mixed in the rainwater, and the rainwater is discharged into a river or the like. Alternatively, it cannot be used as water for the drainage facility 5 or the like. Therefore, when the septic tank 70 is used as a rainwater tank, anaerobic microorganisms and aerobic microorganisms in the septic tank 70 may be removed. When storing sewage in the septic tank 70, anaerobic microorganisms and aerobic microorganisms may be introduced therein.

  The upstream end of the overflow pipe 77 is connected to the upper part of the side surface of the downstream portion of the septic tank 70. The downstream end of the overflow pipe 77 is connected to the side groove 15. Here, when rainwater flows into the septic tank 70, when the rainwater level in the septic tank 70 rises and reaches a connection site with the overflow pipe 77, the rainwater flows into the side groove 15 via the overflow pipe 77. However, the overflow pipe line 77 is provided with a sealing valve (not shown) for preventing sewage from flowing. When the sewage flows into the septic tank 70, the overflow pipe 77 is sealed by the sealing valve so that the sewage does not flow into the side groove 15.

  A cylinder 78 projects in the vertical direction at a location located above the sedimentation tank 76 on the upper surface of the septic tank 70. The cylinder 78 is provided on the upper surface of the septic tank 70 so that the upper end is substantially the same height as the ground. An operator can maintain and inspect the inside of the septic tank 70 through the cylinder 78. In the normal state, as shown in FIG. 9, the upper portion of the cylinder 78 is closed by a lid 79.

  Next, a method for using the drainage system 1A according to the present embodiment will be described. Here, at normal time, in the drainage system 1A, rainwater is discharged to the septic tank 70, and sewage is discharged to the sewage main pipe 25. On the other hand, when a disaster such as an earthquake or a tsunami occurs and the sewage main 25 is damaged, rainwater is discharged into the gutter 15 and sewage is discharged into the septic tank 70. In the following description, a normal usage mode is referred to as a normal mode, and a disaster usage mode is referred to as a disaster mode.

  As shown in FIG. 1, in the normal mode, the lid 42A (see FIG. 4) that closes the second outlet 54A of the rainwater 40A is removed, and the second outlet 54A is opened. The rainwater that has flowed into the rainwater inflow conduit 11 flows into the main body 41A from the inflow port 52A of the rainwater 40A. Since the second outlet 54A of the rainwater 40A is opened, the rainwater that has flowed into the main body 41A gradually flows out of the main body 41A from the second outlet 54A. Rainwater flowing out from the second outlet 54 </ b> A is discharged to the septic tank 70 via another rainwater outflow pipe 13. At this time, the septic tank 70 is used as a rainwater tank, and the inside thereof is in a state where anaerobic microorganisms and aerobic microorganisms are not charged. The rainwater that has flowed into the septic tank 70 is discharged into the side groove 15 via the overflow pipe 77 when the water level reaches the connection location of the overflow pipe 77 of the septic tank 70.

  In the normal mode, the second outlet 54B of the sewage basin 40B is blocked by the lid body 42B (see FIG. 4) and is in a closed state. The sewage that has flowed into the sewage inflow conduit 21 flows into the main body 41B through the sewage 40B inlet 52B. The sewage that has flowed into the main body 41B passes through the upper part of the lid 42B that closes the second outlet 54B, and then flows out of the main body 41B from the first outlet 53B. The sewage flowing out from the first outlet 53B flows through the sewage outflow pipe 22 and is discharged to the sewage main pipe 25. The sewage discharged to the sewage main pipe 25 is guided to a sewage treatment plant or the like for purification.

  In the disaster mode, the second outflow port 54A of the rainwater 30A is closed by the lid 42A. The rainwater flowing in from the rainwater inflow conduit 11 flows into the main body 41A through the rainwater inlet 40A. The rainwater that has flown into the main body 41A passes over the lid 42A that closes the second outlet 54A, and then flows out of the main body 41A from the first outlet 53A. Rainwater flowing out from the first outlet 53 </ b> A flows through the rainwater outflow pipe 12 and is discharged to the side groove 15. Then, the rainwater discharged to the side groove 15 is discharged into a river or the like.

  Further, in the disaster mode, the cover 42B of the sewage basin 40B is removed, and the second outlet 54B is opened. The lid 42B of the sewage masu 40B can be removed as follows, for example. First, as shown in FIG. 2, the operator removes the lid 57 </ b> B that covers the inspection cylinder 56 </ b> B. Next, the operator inserts his / her hand into the inspection cylinder 56B and pulls up the lid 42B by holding the handle 62B (see FIG. 7) of the lid 42B. As a result, the second outlet 54B of the sewage basin 40B is opened. If the hand 62B cannot reach, for example, a rod-like body having a hook at the tip may be used, and the lid 42B may be pulled up by hooking the hook onto the hand 62B.

  As shown in FIG. 1, in the disaster mode, the sewage flowing into the sewage inflow conduit 21 flows into the main body 41B from the inlet 52B of the sewage 40B. Since the 2nd outflow port 54B is open | released at this time, the sewage which flowed into the main body 41B flows out out of the main body 41B from the 2nd outflow port 54B. The sewage flowing out from the second outlet 54B is discharged to the septic tank 70 through another sewage outflow pipe 23. In the disaster mode, when rainwater is stored in the septic tank 70, before switching the flow path of the sewage, for example, the rainwater in the septic tank 70 is sucked by a suction pump (not shown) to Should be emptied once. Then, anaerobic microorganisms are introduced into the anaerobic tank 74 of the sewage tank 70, and aerobic microorganisms are introduced into the aerobic tank 75. As shown in FIG. 10, the sewage discharged to the purification tank 70 sequentially passes through the anaerobic tank 74, the aerobic tank 75, and the settling tank 76, and is purified by the anaerobic microorganisms and the aerobic microorganisms. At this time, the overflow pipe line 77 connected to the septic tank 70 is closed by the sealing valve. Therefore, the purified sewage (typically treated water) does not flow to the side groove 15 via the overflow pipe 77. When some amount of sewage is stored in the septic tank 70, the operator removes the lid 79 that closes the upper part of the cylinder 78 provided on the upper surface of the septic tank 70, and inserts a suction pump into the septic tank 70 through the cylinder 78. The purified sewage collected in the settling tank 76 of the septic tank 70 is sucked up by the suction pump.

  As described above, in the present embodiment, as shown in FIG. 1, the first state in which rainwater flowing into the rainwater inflow conduit 11 is caused to flow into the rainwater inflow conduit 12 by the rainwater 40A, and the rainwater inflow conduit 11. It is possible to switch to the second state in which rainwater flowing into the septic tank 70 flows. In addition, the wastewater 40B causes the third state in which the sewage flowing into the sewage inflow conduit 21 flows to the sewage inflow conduit 22 and the fourth state in which the sewage flowing into the sewage inflow conduit 21 flows into the septic tank 70. Can be switched. Here, when stormwater 40A is switched to the second state, sewage basin 40B is switched to the third state, and when stormwater 40A is switched to the first state, sewage basin 40B is switched to the fourth state. It is configured to be. Therefore, it is possible to appropriately select whether rainwater or sewage flows through the septic tank 70 by the rainwater basin 40A and the sewage basin 40B. In the present embodiment, in normal times, the second outlet 54A of the rainwater 40A is opened to allow the rainwater to flow into the septic tank 70, and the second outlet 54B of the wastewater 40B is closed by the lid 42B. To the sewer main 25. On the other hand, in the event of a disaster, the rainwater flow is switched to the rainwater outflow pipe 12 by switching the rainwater flow path with the rainwater 40A, and the dirty water is flowed to the septic tank 70 by switching the wastewater flow path with the wastewater 40B. Thus, the septic tank 70 can be effectively used even during normal times and disasters. Moreover, since sewage can be flowed into the septic tank 70, even if the sewage main pipe is damaged in the event of a disaster, the drainage equipment 5 such as a toilet, a bath, and a kitchen sink can be used.

  Rainwater may contain foreign matter such as fallen leaves and sand, and the foreign matter may accumulate in the rainwater 40A. Therefore, there is a possibility that the flow path switching function of rainwater 40A may be impaired by foreign matter. However, in this embodiment, the rainwater basin 40A includes an inspection port 51A. Therefore, maintenance is easy via the inspection port 51A. Therefore, when the foreign matter is clogged in the rainwater 40A, the foreign matter can be easily removed from the inspection port 51A. Therefore, the flow path switching function can be sufficiently ensured, and it is easy to avoid a situation where the rainwater flow path cannot be switched.

  Moreover, in this embodiment, as shown in FIG. 4, the 2nd outflow port 54A of 40 A of rainwater is provided in the position lower than the inflow port 52A and the 1st outflow port 53A, and is opened below. The lid 42A of the rainwater tank 40A is detachably provided at the second outlet 54A. Thus, when the lid 42A is attached to the second outlet 54A, the inlet 52A and the first outlet 53A communicate with each other, and the communication between the inlet 52A and the second outlet 54A is blocked. Therefore, the rainwater that has flowed into the main body 41A from the inflow port 52A of the stormwater 40A flows out from the first outflow port 53A and does not flow out from the second outflow port 54A. Therefore, at this time, the rainwater that has flowed into the rainwater inflow conduit 11 can flow to the side groove 15 via the rainwater outflow conduit 12. On the other hand, when the lid 42A is removed from the second outlet 54A, the inlet 52A, the first outlet 53A, and the second outlet 54A communicate with each other. However, the second outlet 54A is provided at a position lower than the inlet 52A and the first outlet 53A. Therefore, the rainwater that has flowed into the main body 41A from the inflow port 52A does not flow out of the first outflow port 53A, but out of the second outflow port 54A. Therefore, at this time, the rainwater that has flowed into the rainwater inflow conduit 11 can flow into the septic tank 70.

  The sewage discharged from the drainage facility 5 may contain foreign matter such as toilet paper, and the foreign matter may accumulate on the sewage 40B. Therefore, there is a possibility that the flow path switching function of the dirty water 40B may be impaired by the foreign matter. However, in this embodiment, the sewage basin 40B is provided with the inspection port 51B, so that maintenance is easy via the inspection port 51B. Therefore, when the foreign matter is clogged in the sewage basin 40B, the foreign matter can be easily removed from the inspection port 51B. Therefore, it is possible to sufficiently ensure the flow path switching function, and to easily avoid a situation where the flow path of the sewage cannot be switched.

  Further, in the present embodiment, the second outlet 54B of the sewage basin 40B is provided at a position lower than the inlet 52B and the first outlet 53B and opens downward. The lid 42B of the sewage trough 40B is detachably provided at the second outlet 54B. When the lid 42B is attached to the second outlet 54B, the inlet 52B and the first outlet 53B communicate with each other, and the communication between the inlet 52B and the second outlet 54B is blocked. Therefore, the sewage flowing in from the inflow port 52B of the sewage mass 40B flows out from the first outflow port 53B and does not flow out from the second outflow port 54B. Therefore, at this time, the sewage flowing into the sewage inflow pipe 21 can be flowed to the sewage main pipe 25 through the sewage outflow pipe 22. On the other hand, when the lid 42B of the wastewater tank 40B is removed from the second outlet 54B, the inlet 52B, the first outlet 53B, and the second outlet 54B communicate with each other. However, the second outlet 54B is provided at a position lower than the inlet 52B and the first outlet 53B. Therefore, the sewage flowing in from the inflow port 52B does not flow out of the first outflow port 53B but out of the second outflow port 54B. Therefore, at this time, the sewage flowing into the sewage inflow conduit 21 can flow into the septic tank 70.

  In this embodiment, when sewage is discharged into the septic tank 70, the sewage can be purified. Specifically, the sewage passes through the anaerobic tank 74, the aerobic tank 75 and the settling tank 76 of the septic tank 70 in order, and the dirt is removed by the anaerobic microorganisms and the aerobic microorganisms as the purification means. Therefore, the sewage purified by the septic tank 70 can be discharged into a river or the like. In addition, at the time of a disaster, the purified sewage can be reused as water for flushing toilet waste.

  Moreover, in this embodiment, the septic tank 70 is provided with the rain water port 71 to which 40 A of rain water was indirectly connected, and the waste water port 72 to which 40 B of dirty water was indirectly connected. The rain water port 71 is provided at a position higher than the dirty water port 72. Dirty water is often contaminated with rain and foreign matter such as manure, and is dirty water. Therefore, when sewage flows backward from the septic tank 70 to the rainwater 40A or other rainwater outflow pipe 13, foreign matter such as manure or urine adheres to the rainwater 40A or other rainwater outflow pipe 13 or smell is attached. There is a fear. However, in this embodiment, since the rainwater port 71 of the septic tank 70 is provided at a position higher than the sewage port 72, the sewage in the septic tank 70 flows from the rainwater port 71 into the rainwater 40A or other rainwater outflow pipe 13. Can be difficult.

  The drainage system 1A according to the first embodiment has been described above. However, the drainage system according to the present invention is not limited to the drainage system 1A according to the first embodiment, and can be implemented in various other forms. Next, another embodiment will be briefly described. In the following description, the same components as those already described are denoted by the same reference numerals, and the description thereof is omitted.

Second Embodiment
In the first embodiment, the side groove 15 and the sewage main pipe 25 are both provided on the right side of the septic tank 70 (in FIG. 1, the right side of the septic tank 70), and the rainwater pipe 10 and the sewage pipe 20 are both illustrated. 1 extended in the left-right direction. However, the arrangement positions of the side groove 15 and the sewage main pipe 25 and the arrangement positions of the rainwater pipe 10 and the sewage pipe 20 are not particularly limited.

  FIG. 11 is a plan view of a drainage system 1B according to the second embodiment. As shown in FIG. 11, the side groove 15 and the sewage main pipe 25 may be arranged in different directions with the septic tank 70 as a reference. In the present embodiment, the side groove 15 is disposed in front of the septic tank 70, and the sewage main pipe 25 is disposed on the right side of the septic tank 70.

  Moreover, both the rainwater pipeline 10 and the sewage pipeline 20 may extend in different directions. In the present embodiment, for example, the rainwater pipe 10 extends in the front-rear direction, and the sewage pipe 20 extends in the left-right direction. In this case, the rainwater pipeline 10 and the sewage pipeline 20 intersect in plan view. Further, here, the rainwater basin 40A and the sewage basin 40B are provided at close positions. As a result, when the operator switches between the rainwater flow path and the sewage flow path, the travel time can be shortened, so the work time for the rainwater flow path switching work and the sewage flow path switching work can be shortened. Can do. Even in the present embodiment, the same effect as in the first embodiment can be obtained.

<Third Embodiment>
Next, a drainage system 1C according to the third embodiment will be described. In each of the above embodiments, the rainwater trough 40A and the septic tank 70 are indirectly connected via the other rainwater outflow conduit 13. The sewage basin 40B and the septic tank 70 were indirectly connected via another sewage outflow pipe 23. However, in the drainage system 1C according to the third embodiment, both the rainwater basin 40A and the sewage basin 40B are directly connected to the septic tank 70.

  FIG. 12 is a side view of a drainage system 1C according to the third embodiment. As shown in FIG. 12, a rainwater port 71 and a sewage port 72 are formed on the upper surface of the septic tank 70. The rainwater tank 40A is placed on the septic tank 70 so that the second outlet 54A and the rainwater port 71 communicate with each other. Further, the sewage basin 40B is placed on the septic tank 70 so that the second outlet 54B and the sewage port 72 communicate with each other.

  As described above, the storage means (the septic tank 70 in each of the above embodiments), the storm water flow path switching means (in each of the above embodiments, the storm water 40A) and the sewage flow path switching means (in each of the above embodiments, the sewage water). "Connection" with 40B) means that the storage means and the rainwater flow path switching means and the sewage flow path switching means are directly connected as in the third embodiment, and the first and second embodiments. Thus, the case where the storage means, the rainwater flow path switching means, and the sewage flow path switching means are indirectly connected is included.

  The rainwater mass 40A and the sewage mass 40B are both directly connected to the septic tank 70, so that the number of parts can be reduced. Therefore, cost can be reduced.

<Fourth embodiment>
Next, a drainage system 1D according to the fourth embodiment will be described. FIG. 13 is a front view of a drainage system 1D according to the fourth embodiment. In FIG. 13, the sewage main pipe 15, the storm water pipe 10, the storm water pipe 40 </ b> A, and the side grooves 15 connected to the sewage outflow pipe 22 are omitted. As shown in FIG. 13, the drainage system 1 </ b> D includes a return means 90. The return means 90 guides the sewage purified by the purification means of the septic tank 70 (hereinafter also referred to as treated water) to the drainage facility 5. In the present embodiment, the return means 90 includes a return pump 91 and a return conduit 92. The return pump 91 is disposed in the septic tank 70. The configuration of the return pump 91 is not particularly limited, but in this embodiment, the return pump 91 is an underwater installation type submersible pump. The return pump 91 sucks up the treated water purified in the septic tank 70. The return pipe 92 is a pipe for guiding the treated water sucked up by the return pump 91 to the drainage facility 5. Here, the return conduit 92 is inserted into the septic tank 70 via the cylinder 78. One end of the return pipe 91 is connected to the return pump 91. The other end of the return conduit 91 is connected to the drainage facility 5.

  In the present embodiment, sewage flowing out of the drainage facility 5 is discharged to the septic tank 70 at the time of a disaster. The sewage discharged to the septic tank 70 is purified by the purification means of the septic tank 70. When sewage is stored in the septic tank 70 to some extent, the return pipe 92 connected to the return pump 91 is inserted into the septic tank 70. At this time, the other end of the return conduit 92 is connected to the drainage facility 5 (specifically, a water storage tank of the drainage facility 5). Then, the treated water in the septic tank 70 is sucked up by the return pump 91. The treated water sucked up flows into the drainage facility 5 through the return conduit 92. Therefore, the user can reuse this treated water in the drainage facility 5.

<Other embodiments>
In each of the above embodiments, the rainwater 40A is used as a means for switching the rainwater flow path, and the wastewater 40B is used as a means for switching the wastewater flow path. However, as shown in FIG. 14, it may be 140 which has both means for switching the rainwater flow path and means for switching the wastewater flow path. In this case, an inspection port 151 that opens upward is formed at the top of the main body 141. The inspection port 151 has a circular shape in plan view. However, since 140 has both means for switching the flow path of rainwater and means for switching the flow path of sewage, the inspection port 151 for performing the work of switching the flow path by the operator is increased. Sometimes. Therefore, the inspection port 151 may have an elliptical shape in plan view. This makes it easy for the operator to switch the flow path of rainwater or sewage. First, a rainwater inlet 152A, a sewage inlet 152B, a first stormwater outlet 153A, and a first sewage outlet 153B are formed on the side of the main body 141. First, as shown in FIG. 15, a second outlet 154 that opens downward is formed at the lower portion of the main body 141. The septic tank 70 is connected to the second outlet 154. The rainwater inlet 152A, the first rainwater outlet 153A, and the second outlet 154 communicate with each other, the rainwater inlet pipe 11 is connected to the rainwater inlet 152A, and the rainwater outlet pipe is connected to the first rainwater outlet 153A. The path 12 is connected. In addition, the sewage inlet 152B, the first sewage outlet 153B, and the second outlet 154 communicate with each other, the sewage inflow conduit 21 is connected to the sewage inlet 152B, and the sewage is supplied to the first sewage outlet 153B. An outflow line 22 is connected.

  In addition, the lid 140 is provided at the second outlet 154 so as to be detachable. Here, the 2nd outflow port 154 is substantially circular shape in planar view, and the cover body 142 is substantially half moon shape in planar view. The lid 142 is provided with a plate 143 that rises upward from a linear end to separate the rainwater flow path and the sewage flow path. By arranging the lid 142 as shown in FIG. 15, it is possible to block a communication portion between the rainwater inlet 152 </ b> A and the first rainwater outlet 153 </ b> A in the second outlet 154 in a plan view. At this time, the rainwater inlet 152A and the first rainwater outlet 153A communicate with each other so that rainwater does not flow from the rainwater inlet 152A to the second outlet 154, and sewage flows from the sewage inlet 152B to the first sewage outlet 153B. The sewage inflow port 152B and the second outflow port 154 are in communication with each other so as not to flow.

  On the other hand, the lid 142 can block the communication portion between the sewage inlet 152B and the first sewage outlet 153B in the second outlet 154 by rotating 180 degrees around the point P from the state of FIG. . At this time, the rainwater inlet 152A and the second outlet 154 communicate with each other so that rainwater does not flow from the rainwater inlet 152A to the first rainwater outlet 153A, and sewage flows from the sewage inlet 152B to the second outlet 154. The sewage inflow port 152B and the first sewage outflow port 153B communicate with each other so as not to flow.

  Even if it is such 140, normally, sewage can be discharged from the 1st sewage outflow port 153B to the sewage main pipe 25, discharging rainwater from the 2nd outflow port 154 to the septic tank 70. When a disaster such as an earthquake or tsunami occurs and the sewage main pipe 25 is damaged, the rainwater is discharged from the first rainwater outlet 153A to the gutter 15 by switching the flow path of rainwater and sewage with the lid 142, Sewage can be discharged from the second outlet 154 to the septic tank 70. In such an increase 140, the flow path between the rainwater and the sewage can be switched by one, so that the switching operation can be facilitated. Moreover, since the number of parts can be reduced, cost can be reduced.

<Modification>
In each said embodiment, the inside of the septic tank 70 as a storage means was divided into three tanks. However, the septic tank 70 may be divided into two tanks or may be divided into four or more tanks. Further, the storage means may not be the septic tank 70, but may be a simple tank whose interior is not divided into a plurality of tanks.

  Moreover, in each said embodiment, the rainwater flow path switching means was 40A of rainwater which has a flow path switching function, and the sewage flow path switching means was 40B of sewage water which has a flow path switching function. However, the rainwater flow path switching means and / or the sewage flow path switching means may be a switching valve. For example, the rainwater flow path switching means may be 40 A of rainwater having a flow path switching function, and the sewage flow path switching means may be a switching valve. The rainwater flow path switching means may be a switching valve, and the sewage flow path switching means may be a sewage tank 40B having a flow path switching function.

1A, 1B, 1C, 1D Drainage system 11 Rainwater inflow conduit 12 Rainwater outflow conduit 21 Sewage inflow conduit 22 Sewage outflow conduit 40A Rainwater (Rainwater flow path switching means)
40B Wastewater (sewage flow path switching means)
41A masu body (rain water masu body)
41B masu body (sewage masu body)
42A Lid (Rainwater switching means)
42B Lid (sewage switching means)
51A, 51B Inspection port 52A Inlet (rainwater inlet)
52B inlet (sewage inlet)
53A First outlet (first rainwater outlet)
53B First outlet (first sewage outlet)
54A Second outlet (second rainwater outlet)
54B Second outlet (second sewage outlet)
70 Septic tank (storage means)
90 Return means 91 Return pump 92 Return line

Claims (9)

A rainwater inflow conduit from which rainwater flows from the upstream end;
Rainwater flow path switching means connected to the downstream end of the rainwater inflow conduit,
A storm water outflow pipe through which an upstream end is connected to the storm water flow path switching means and storm water flows out from the downstream end;
A sewage inflow conduit whose upstream end is connected to a drainage facility;
A sewage flow path switching means connected to the downstream end of the sewage inflow pipe,
A sewage outflow pipe having an upstream end connected to the sewage flow path switching means and a downstream end connected to a sewage main pipe;
A storage means connected to the rainwater flow path switching means and the sewage flow path switching means, for storing rainwater and sewage,
With
The rainwater flow path switching means can be switched between a first state in which rainwater flows from the rainwater inflow conduit to the rainwater outflow conduit and a second state in which rainwater flows from the rainwater inflow conduit to the storage means. Composed of
The sewage flow path switching means can be switched between a third state in which sewage flows from the sewage inflow pipe to the sewage outflow pipe and a fourth state in which sewage flows from the sewage inflow pipe to the storage means. Consists of a drainage system.   The drainage system according to claim 1, wherein the storage means is a septic tank provided with a purification means for purifying sewage.   The drainage system according to claim 2, further comprising a return means for guiding the treated water purified by the purification means to the drainage facility. The rainwater flow path switching means is
The storage means is connected to an inspection port that opens upward, a rainwater inflow port to which the downstream end of the rainwater inflow conduit is connected, a first rainwater outflow port to which the upstream end of the rainwater outflow conduit is connected, and A second storm water outlet,
A first switching position provided in the rainwater main body, wherein the rainwater inlet and the first rainwater outlet are in communication with each other so that rainwater does not flow from the rainwater inlet to the second rainwater outlet; Rainwater switching means capable of changing the position between a second switching position that connects the rainwater inlet and the second rainwater outlet so that rainwater does not flow from the inlet to the first rainwater outlet; The drainage system according to any one of claims 1 to 3, wherein the drainage system is provided with rainwater. The second rainwater outlet is provided at a position lower than the rainwater inlet and the first rainwater outlet, and opens downward.
The drainage system according to claim 4, wherein the rainwater switching means is a lid that is detachably provided at the second rainwater outlet. The sewage flow path switching means is
An inspection port that opens upward, a sewage inflow port to which a downstream end of the sewage inflow pipe is connected, a first sewage outflow port to which an upstream end of the sewage outflow pipe is connected, and the storage means are connected. A second sewage outlet, and a sewage mass body having
A third switching position provided in the sewage mass main body for communicating the sewage inlet and the first sewage outlet so that sewage does not flow from the sewage inlet to the second sewage outlet; Sewage switching means capable of changing the position between the sewage inlet and the fourth switching position for communicating the second sewage outlet so that sewage does not flow from the inlet to the first sewage outlet; The drainage system according to any one of claims 1 to 5, wherein the drainage system comprises a sewage basin. The second sewage outlet is provided at a position lower than the sewage inlet and the first sewage outlet, and opens downward.
The drainage system according to claim 6, wherein the sewage switching means is a lid that is detachably provided at the second sewage outlet.   When the rainwater flow path switching means is switched to the second state, the sewage flow path switching means is switched to the third state, and when the rainwater flow path switching means is switched to the first state, The drainage system according to any one of claims 1 to 7, wherein the sewage flow path switching unit is configured to be switched to the fourth state. The storage means includes a storm water port to which the storm water channel switching unit is connected, and a sewage port to which the sewage channel switching unit is connected,
The drainage system according to any one of claims 1 to 8, wherein the rainwater port is provided at a position higher than the sewage port.

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