JP2020012353A - Water storage device and drainage system - Google Patents

Abstract

To provide a water storage device and a drainage system that can easily perform an opening and closing operation of a water outlet for draining sewage.SOLUTION: A water storage device 10 comprises: an outlet 14; a closing unit 18 that allows the outlet 14 to be closed; an operation unit 20 that is connected to the closing unit 18; and a lid 32 that has an insertion portion 34 through which the operation unit 20 can be inserted, and can close an opening 31, wherein the closing unit 18 can open and close the outlet 14 by operating the operation unit 20, the operation unit 20, which is a tubular member, is provided with a water inlet 36 at one end thereof, and with a discharge port 38 at the other end for discharging the water taken in from the water inlet 36.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drainage system for draining sewage.

  BACKGROUND ART Conventionally, a sewage discharge system that discharges sewage from a drainage system to a sewage main pipe is known. Examples of the drainage equipment include a toilet, a bath, and a kitchen sink. This type of sewage discharge system includes a pipeline connecting a drainage facility and a sewage main pipe. The sewage discharged from the drainage system is discharged to the sewer main line through the pipeline.

  By the way, when a disaster such as a large-scale earthquake or tsunami occurs, supply of water to a drainage facility becomes impossible, and there is a possibility that water cutoff or the like may occur. In addition, in order to solve the shortage of drainage facilities such as toilets at the time of disaster, temporary drainage facilities such as simple toilets may be provided in addition to existing toilets.

  Such a temporary drainage facility can be provided using a standing pipe provided in an existing pipeline. The sewage discharged from the temporary drainage system can be stored in the pipeline to a predetermined amount, and after reaching the predetermined amount, the downstream valve can be opened to discharge the sewage.

  Here, when the valve is opened to discharge sewage, it is assumed that a person other than a person having specialized knowledge needs to perform work. Therefore, it is desirable that the operation of opening the valve can be easily performed by a person without specialized knowledge. As a technique relating to the opening operation of the valve in such an emergency, Japanese Patent Application Laid-Open Publication No. H11-163,897 discloses a drainage facility for a temporary toilet. In the drainage device of Patent Document 1, the opening operation of the water storage gate provided in the manhole can be performed without removing the cover material of the manhole.

JP 2017-127645 A

  However, the drainage device of Patent Literature 1 can only open a valve disposed downstream of the temporary toilet after the sewage is stored until the sewage reaches a predetermined amount. In other words, the drainage device of Patent Literature 1 merely causes sewage to flow down to the sewage mains, regardless of whether or not sewerage can be supplied and drained.

  In addition, a configuration in which an electric switch is provided for the purpose of easily opening and closing the outflow port by a person who does not have specialized knowledge at the time of a disaster or the like is also conceivable. However, in the event of a disaster, it is expected that all lifelines will stop, such as the stoppage of water supply and electricity supply. Therefore, it is desirable that equipment that is assumed to be used in the event of a disaster can be manually operated without requiring a power supply.

  Therefore, an object of the present invention is to provide a water storage device and a drainage system that can easily perform an opening and closing operation of a water outlet for draining wastewater.

  The water storage device of the present invention provided to solve the above-described problem is arranged on a pipe forming a drainage flow path for draining sewage, and is formed in a cylindrical shape and has water introduced therein. A water storage device main body provided with an outlet for allowing water to flow out, a closing part capable of closing the flow outlet, and an opening formed to communicate with the inside at one axial end of the water storage device main body. A lid, and the outlet is closed by the closing part, whereby water can be stored inside the water storage device main body, and by moving the closing part to a position outside the outlet, the flow outlet is closed. The outlet can be opened to allow the water stored in the water storage device main body to flow out, and has a tubular shape, has an operating portion connected to the closing portion, and has an insertion portion provided in the lid. Inserting the operation part into the part Accordingly, the operation unit is held so as to be slidable in the axial direction of the water storage device main body, and in a state in which the outlet is closed by the closing portion, the end on the water supply port side is the water storage device main body. The water outlet device is characterized in that it is held so that the end on the discharge port side opens inside the water storage device main body while protruding outside.

  According to the water storage device of the present invention, the opening and closing operation of the outlet can be performed in a state where the water storage device is closed by the lid. Therefore, the water storage device of the present invention does not need to remove the lid to perform the opening / closing operation of the outlet, and can easily perform the opening / closing operation of the outlet even if the person does not have specialized knowledge. Further, in the water storage device of the present invention, since the operation unit is a tubular member, water can be supplied from the outside of the water storage device to the inside through the operation unit while the water storage device is closed by the lid. . Therefore, the water storage device of the present invention can easily perform the opening / closing operation of the outlet and the water supply operation with the lid closed. Furthermore, the water storage device of the present invention can manually open and close the outlet. Therefore, the water storage device of the present invention can open and close the outlet even when the supply of electricity is stopped. In the present invention, the opening formed to communicate with the inside at one axial end of the water storage device main body is connected to the water storage device main body even if the opening is provided in the water storage device main body itself. An opening formed in another cylinder (such as the inspection cylinder 30 described later) may be used.

  The water storage device of the present invention is configured such that the operation unit includes a first pipe attached to the closing section, and a second pipe connected to the first pipe, and the first pipe and the second pipe. In a state where the pipes are connected, the first pipe is provided with a length extending from the outflow port to the outside of the water storage device, and in a state where the second pipe is removed from the first pipe. Is preferably contained in the water storage device.

  According to the above-described configuration, the second tube of the operation unit is normally removed from the first tube, and the operation unit is housed inside the water storage device so as not to protrude to the outside of the water storage device. When an opening and closing operation is required, the first pipe and the second pipe can be used in combination. As a result, the water storage device of the present invention can prevent the operation unit from protruding from the water storage device and hindering traffic, etc., during normal times, while allowing the operation unit to function during a disaster or the like.

  Further, it is preferable that the water storage device of the present invention has a stopper portion for regulating a displacement range of the operation portion.

  According to the above configuration, it is possible to restrict the displacement range of the closing portion by operating the operation unit within an appropriate range. That is, according to the water storage device of the present invention, it is possible to suppress such a problem that the operation unit is excessively displaced and the operation unit comes off the outside of the water storage device, or the closing unit falls out of the outlet.

  Further, in the water storage device of the present invention, the operation section may include a first pipe attached to the closing section, a second pipe connected to the first pipe, the first pipe and the second pipe. A pipe joint for connecting the pipes, and the stopper portion may be formed on the pipe joint.

  According to the above configuration, the pipe joint can function as a stopper. Accordingly, the water storage device of the present invention does not need to additionally provide a component for functioning as a stopper, and can suppress an increase in the number of components.

  In the water storage device of the present invention, the stopper portion is formed so as to protrude in a radial direction of the operation portion, and the operation portion is located at a position where the stopper portion and the lid abut. Axial movement may be restricted.

  According to the above configuration, it can be used as a configuration for bringing the lid into contact with the stopper portion. As a result, in the water storage device of the present invention, it is not necessary to additionally provide a component for bringing the stopper portion into contact, and it is possible to suppress an increase in the number of components.

  In the water storage device of the present invention, the operation unit may include a pipe joint that connects the first pipe and the second pipe.

  According to the above configuration, the first tube and the second tube can be connected without separating the flow path that passes through the entire operation unit while the first tube and the second tube can be separated and connected. Can be.

  Further, in the water storage device of the present invention, the operation section may include a first pipe attached to the closing section, a second pipe connected to the first pipe, the first pipe and the second pipe. And a pipe joint for connecting the pipes, wherein the first pipe is screwed and connected to the pipe joint by rotating in a circumferential direction relative to the front pipe joint. You may.

  According to the configuration described above, the first tube and the second tube can be separated and connected, and the first tube is inserted from the insertion portion of the lid and then rotated to perform the disassembled operation. The parts can be connected. As a result, the water storage device of the present invention can easily perform the operation of connecting the operation units.

  The drainage system of the present invention includes the above-described water storage device, a pipe line that forms a drainage channel for draining sewage, and a water supply source, wherein the water storage device is on the pipe line and is higher than the water supply source. It is characterized by being provided on the downstream side.

  ADVANTAGE OF THE INVENTION According to the drainage system of this invention, water can be supplied from a water supply source, and the sewage in a pipeline can be washed away and drained. Further, according to the drainage system of the present invention, the outlet of the water storage device can be opened and closed while the water storage device is closed by the lid. Therefore, the drainage system of the present invention does not need to remove the lid to perform the opening / closing operation of the outlet of the water storage device, and can easily perform the opening / closing operation of the outlet even if there is no specialized knowledge. it can. Further, in the drainage system of the present invention, since the operation unit of the water storage device is a tubular member, water is supplied from the outside of the water storage device to the inside through the operation unit while the water storage device is closed by the lid. can do. Therefore, the drainage system of the present invention can easily perform the opening / closing operation of the outlet and the water supply operation with the lid closed. Furthermore, the water storage device of the drainage system of the present invention can manually open and close the outlet. Therefore, the drainage system of the present invention can open and close the outlet of the water storage device even when the supply of electricity is stopped.

  In addition, the drainage system of the present invention includes one or a plurality of standing pipes provided on the pipeline and a temporary drainage facility temporarily attached to at least one of the standing pipes, and a vertical drainage facility provided with the temporary drainage facility. A pipe may be provided on the pipeline and downstream of the water storage device.

  According to the above-described configuration, a temporary drainage facility such as a temporary toilet can be installed by utilizing an existing standing pipe at the time of a disaster or the like. Further, according to the above configuration, the wastewater discharged from the temporary drainage facility can be drained by being flushed with the water supplied from the water supply source.

  The drainage system of the present invention has a sewage storage tank that can store sewage, and a switchable drainage mass that can switch the drainage flow path, and an operation is performed on the switchable drainage mass. Alternatively, the drain passage may be switchable so as to discharge sewage toward the sewage storage tank.

  According to the above-described configuration, in a case where a pipe downstream of the sewage main pipe or the switching mass is broken, the discharge destination of the sewage can be switched to the sewage storage tank to drain the sewage. That is, according to the drainage system of the present invention, when the water supply to the sewer is stopped and the water supply becomes impossible, and the drainage to the sewer main does not function (when the water supply and drainage is not possible), the function of the water supply and drainage is replaced and the wastewater is replaced. Can be drained.

  In the drainage system of the present invention, the water supply source is a water storage tank capable of storing water, the pump has a pump for pumping water from the water storage tank, and the stored water supplied via the pump is the water supply source. The water may be supplied from the mouth into the water storage device.

  According to the above configuration, sewage can be efficiently drained by utilizing the stored water stored in the water storage tank.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a water storage device and a drainage system that can easily perform an opening and closing operation of a water outlet for draining sewage.

It is a schematic diagram which shows the drainage system of this invention. It is sectional drawing which shows the water storage device of this invention. 3 shows a mass main body, a closing part, and an operation part of the water storage device of FIG. 2. 3A is a plan view, FIG. 3B is a left side view, FIG. 3C is a sectional view taken along line A-A ′ in FIG. 3B, and FIG. 3D is a right side view. FIG. 3 is an exploded perspective view of the water storage device of FIG. 2. FIG. 3 is a cross-sectional view illustrating a state of an operation unit of the water storage device of FIG. 2 and a case where the operation unit is operated. (A) shows a separated state, (b) shows a connected state, and (c) shows a state in which the operation unit is pulled up. It is sectional drawing which shows the switching type drainage mass of the drainage system of FIG. It is a perspective view which shows the mass main body of the switchable drainage mass of FIG. 6, and a switching member. FIG. 7 is a cross-sectional view taken along the line B-B ′ of FIG. 7, illustrating a mass body and a switching member of the switchable drainage mass of FIG. (A) is a state where the first flow path is formed, and (b) is a state where the second flow path is formed. FIG. 2 is a schematic diagram illustrating a normal state of the drainage system of FIG. 1. FIG. 2 is a schematic diagram illustrating the operation of the drainage system in FIG. 1. It is sectional drawing which shows operation | movement of the water storage device of the drainage system of FIG. (A) shows a state in which the outlet is closed to supply stored water, and (b) shows a state in which the outlet is opened.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

  FIG. 2 is a cross-sectional view illustrating the water storage device 10 according to the embodiment of the present invention. FIG. 1 is a schematic diagram showing a drainage system S of the present invention. As shown in FIG. 1, the drainage system S includes a water storage device 10.

<About drainage system>
The drainage system S discharges sewage discharged from the drainage facility 3 toward the downstream side of the sewage main pipe 4 and the like.

  More specifically, the drainage system S is a case where the supply of water to the drainage facility 3 is functioning (during a water supply function) and a case where the drainage to the sewage main pipe 4 is functioning (drainage). During the function, the wastewater discharged from the drainage facility 3 is discharged toward the downstream side of the sewage main pipe 4 and the like.

  Further, the drainage system S is used when the supply of water is stopped due to a disaster such as an earthquake (water cutoff) and the water supply to the drainage facility 3 is not functioning, or in a place where the water supply facility is insufficient, such as an outdoor toilet. When the water supply function is insufficient to install the water supply (when water supply is impossible), stored water is supplied to a pipeline 40 described later to discharge sewage to the downstream side.

  Further, when the drainage system S is damaged and the drainage of the sewage to the sewage main pipe 4 is difficult (when drainage is impossible), the sewage is stored in a sewage storage tank. 84.

  In other words, when the water supply is impossible and the water cannot be drained (when the water supply and drainage is impossible), the drainage system S supplies the stored water for discharging the sewage to the pipeline 40, and discharges the sewage discharged from the drainage facility 3 to the sewage. It is discharged toward the storage tank 84.

  In the following description, the case where the water supply to the drainage facility 3 is functioning and the case where the drainage to the sewer main pipe 4 is functioning is referred to as “at the time of water supply / drainage function” or “at the time of normal operation”. It may be described and described. Further, a case where water supply is not possible and water needs to be supplied from a water supply source such as the water storage tank 80 or the like may be described as “operating”.

  The sewage main pipe 4 is a pipe for guiding sewage to a sewage treatment plant (not shown). The sewage flowing out of the drainage system 3 of the building 1 is discharged to the sewage main pipe 4 at normal times.

  In FIG. 1, the configuration of the drainage system S provided during operation, such as the temporary drainage facility 3b and a water supply pump 82 described later, is indicated by a virtual line.

  “Drainage equipment” is equipment that discharges wastewater. The “drainage equipment” includes, for example, a toilet, a bath or a kitchen sink. In addition, among the “drainage facilities”, drainage facilities such as toilets and baths that are already provided in the building 1 may be described as “existing drainage facilities 3a”. In addition, among the “drainage facilities”, drainage facilities such as temporary toilets provided outside the building 1 may be described as “temporary drainage facilities 3b”.

  The “building” refers to a building having at least a wall, and includes a house, a commercial facility, a factory, a school building, a warehouse, and the like. The “indoor” includes a space under the floor as well as a space on the floor surrounded by a roof and walls. In plan view, the portion surrounded by the wall is “inside the building”.

  “Sewage” is, for example, water discharged from toilets, baths, kitchen sinks, and the like, and cannot be discharged into rivers as it is.

  FIG. 1 illustrates one existing drainage facility 3a provided in one building 1, but the number of the buildings 1 and the existing drainage facility 3a is not particularly limited. The number of the buildings 1 may be one or more. Further, in the indoor 2, only one existing drainage facility 3a may be provided, or a plurality of existing drainage facilities 3a may be provided.

  Further, in FIG. 1, the two temporary drainage facilities 3b are indicated by phantom lines, but the number of the temporary drainage facilities 3b provided in the drainage system S is not particularly limited. Further, the drainage system S of the present invention may be used for draining sewage from the existing drainage facility 3a when the supply of water is stopped, in addition to providing the temporary drainage facility 3b. In such a case, the temporary drainage equipment 3b may not be provided.

  In the sewage flow path in the following description, the sewage main pipe 4 or the sewage storage tank 84 side is simply referred to as “downstream side”, and the side opposite to the downstream side and on which the below-described water storage tank 80 is provided. May be described simply as “upstream side”.

  The “drainage cell” in the present specification includes various drainage cells such as sewage cell, rainwater cell, and public cell. The “drainage mass” in the present specification will be described as including an inspection tube, a standing pipe, and a lid in addition to the mass main body.

  As shown in FIG. 1, the drainage system S includes a water storage device 10, a pipeline 40, a water storage tank 80 (water supply source, water storage tank), a switchable drainage mass 50, a backflow prevention mass 70, and a sewage storage tank 84. . Further, the drainage system S is provided with a water supply pump 82 (pump) and a temporary drainage facility 3b in addition to these components during operation. Hereinafter, each configuration will be described with reference to the drawings.

  The pipe 40 is formed by connecting a plurality of pipes, joints, and the like to form a drainage flow path C that is a flow path of sewage. In addition, a "pipe" means the channel | path which circulates water. The “pipe” may be constituted by one pipe, or may be constituted by a plurality of pipes and a joint connecting them, as in the present embodiment. The “drain passage” means a route followed when water (sewage or the like) is discharged.

  As shown in FIG. 1, the pipe 40 includes a first pipe 42 and a second pipe 44. Further, the pipe 40 is provided with a plurality of standing pipes 48. In the conduit 40, the water storage device 10, the switchable drainage mass 50, and the backflow prevention mass 70 are arranged.

  The first conduit 42 is provided to extend from the water storage device 10 to the sewage main pipe 4. The second conduit 44 is provided so as to extend from the switchable drainage mass 50 to the sewage storage tank 84. The pipeline 40 can form two systems as a drainage flow path C of sewage by the first pipeline 42 and the second pipeline 44. Specifically, the pipe 40 discharges the sewage to the sewage tank 84 through the first pipe 42 and the first flow path c1 that drains the sewage to the sewage main pipe 4 through the first pipe 42. The second flow path c2 can be formed.

  In other words, the conduit 40 forms the first flow path c1 as a normal drainage flow path C for discharging sewage to the sewer main pipe 4 through the first flow path c1. In addition, the pipeline 40 is used when there is a possibility that sewage may flow backward to the upstream side, such as when the sewage main pipe 4 or the first pipeline 42 on the downstream side of the branch with the second pipeline 44 is damaged. A second flow path c2 for discharging sewage to the sewage storage tank 84 is formed as a drainage flow path C for use.

  The standing pipe 48 is provided on the conduit 40. More specifically, the standing pipe 48 is provided in the drainage mass 47 provided in the pipe 40. The standing pipe 48 may be connected to the pipe 40 via a joint, in addition to the pipe provided in the drainage mass. Further, the drainage mass provided with the standing pipe 48 can be variously selected such as a sewage mass and a rainwater mass.

  The standing pipe 48 is a pipe extending downward from the ground. The upper end of the standpipe 48 opens toward the ground. As shown in FIG. 1, a temporary drainage facility 3b can be attached to the upper end of the standing pipe 48. In a state where the temporary drainage facility 3b is not provided, such as during normal times other than during a disaster, the opening at the upper end of the standing pipe 48 is covered with a lid 49 and closed. In a situation where the temporary drainage facility 3b is installed, such as during a disaster, the lid 49 is removed from the opening of the standing pipe 48, and the temporary drainage facility 3b is attached. The lower end of the standing pipe 48 is connected to the first conduit 42.

  Although FIG. 1 shows an example in which the temporary drainage device 3b is provided on the standing pipe 48 provided downstream of the existing drainage device 3a, the temporary drainage device 3b is located on the upstream side of the existing drainage device 3a. It may be provided on the standing pipe 48. For example, when the standing pipe 48 is provided upstream of the existing drainage facility 3a and downstream of the water storage device 10, the temporary draining facility 3b may be provided in the standing pipe 48.

  The water storage device 10 is provided as a floodgate for supplying the stored water supplied from the water storage tank 80 to the pipeline 40. The water storage device 10 of the present embodiment is formed by processing and molding a resin material such as vinyl chloride (PVC) and fiber reinforced plastic.

  As shown in FIGS. 2 and 4, the water storage device 10 includes a mass main body 12, a closing part 18, an operation part 20, an inspection cylinder 30, and a lid 32.

  The water storage device 10 has a substantially cylindrical shape in which an inspection tube 30 that is a cylindrical member is attached to the mass body 12, one end of which is closed in the longitudinal direction, and an opening 31 is formed in the other end. It is shaped like a hollow. Further, a lid 32 is detachably fitted into the opening 31.

  The water storage device 10 is buried in the ground so that the longitudinal direction of the water storage device 10 extends vertically with the opening 31 facing upward and the end opposite to the opening 31 facing downward. In the following description, the longitudinal direction of the water storage device 10 may be simply referred to as “axial direction X”. In addition, among the two sides in the axial direction X of the water storage device 10, the opening 31 side may be simply described as “upper”, and the other may be simply described as “lower”.

  As shown in FIGS. 3 and 4, the mass main body 12 is a substantially cylindrical member having an opening formed at an upper portion and a lower portion closed. As shown in FIG. 4, an outlet 14 is provided on the side of the mass body 12. A first conduit 42 is connected to the outlet 14. The water storage device 10 can cause the water supplied inside to flow out from the outlet 14 toward the first pipeline 42. In the present embodiment, the outlet 14 is a receiving port, but the outlet 14 may be a port. Further, the first conduit 42 may be directly connected to the outlet 14, or may be indirectly connected via another member.

  As shown in FIG. 3A, the mass body 12 is provided with a guide portion 16a. The guide portion 16a is provided to guide the displacement of the closing portion 18 along the axial direction X. As shown in FIG. 4, the guide portion 16a is formed as a groove-shaped unevenness extending in the axial direction X. In the present embodiment, the guide portion 16 a is formed on a guide portion forming body 16 that is separate from the mass main body 12. In the present embodiment, the guide portion 16 a is formed on the mass body 12 by attaching the guide portion forming body 16 to the mass body 12. The guide 16a may be formed directly on the mass body 12.

  As shown in FIG. 4, the guide portion forming body 16 includes a mounting portion 16b and a fitting portion 16c. The mounting portion 16b has a curved shape along the inner wall surface of the mass main body 12, and has a hole 16d substantially at the center. The fitting portion 16c is formed so as to surround a hole 16d formed in the mounting portion 16b. The guide portion forming body 16 is attached to the mass main body 12 in a state where the attaching portion 16b is attached to the inner wall surface of the mass main body 12 and the fitting portion 16c is fitted inside the outlet 14.

  The lid 32 is a lid member attached to the opening 31 to close the opening 31. The lid 32 can be removed and attached from the ground. As shown in FIG. 4, an insertion portion 34 is provided in the lid 32. The insertion section 34 is provided to allow the operation section 20 to be inserted from inside to outside of the water storage device 10. In the present embodiment, the insertion portion 34 is a through hole that passes through substantially the center of the lid 32. As shown in FIG. 4, the insertion portion 34 has a substantially circular shape having a size of the diameter D1. The insertion portion 34 may have any shape as long as the operation portion 20 can be taken out. For example, the insertion portion 34 may have a shape in which a part of the lid 32 is cut away in addition to a case where the through-hole is formed in the lid 32 as in the present embodiment.

  The closing part 18 is provided for closing the outlet 14. As shown in FIG. 4, the closing part 18 has a sliding part 18a and a connecting part 18b. The sliding portion 18a is slidable with respect to the mounting portion 16b of the guide portion forming body 16. The connecting portion 18b is shaped to protrude radially inward of the water storage device 10 from the sliding portion 18a. The connecting portion 18b is provided with a mounting hole 18d. A projection 22a provided on the first tube 22 of the operation unit 20 described later is fitted into the attachment hole 18d of the connection portion 18b, and the first tube 22 is attached.

  The sliding portion 18a is provided with a projecting convex portion 18c extending linearly along the axial direction X. The closing part 18 is attached to the guide part forming body 16 so that the convex part 18c and the guide part 16a mesh with each other. Further, the closing portion 18 is slidable and displaceable with respect to the mass body 12 while being guided in the axial direction X by the fitting structure of the convex portion 18c and the guide portion 16a.

  The operation unit 20 is provided for performing an operation of displacing the closing unit 18 in the axial direction X. As shown in FIG. 4, the operation unit 20 includes a first pipe 22, a second pipe 24, and a pipe joint 26.

  The first tube 22 and the second tube 24 are tubular members. The first tube body 22 is provided with a protruding portion 22a so as to protrude radially outward. The first tubular body 22 is attached to the closing part 18 by fitting the protruding part 22 a into the mounting hole 18 d of the closing part 18.

  As shown in FIG. 4, the second tubular body 24 has an outer diameter of D2. The size of the diameter D2 of the second tubular body 24 is smaller than the diameter D1 of the insertion portion 34 of the lid 32 (D2 <D1).

  The pipe joint 26 is provided to connect the first pipe 22 and the second pipe 24 in a separable manner. The pipe joint 26 of the present embodiment is a so-called conversion joint that can connect two pipes having different radial sizes. As shown in FIG. 4, the pipe joint 26 has an enlarged diameter portion 28 having an outer diameter D3 larger than the outer diameter D2 of the second pipe 24. The outer diameter D3 of the enlarged diameter portion 28 is larger than the diameter D1 of the insertion portion 34 formed in the lid 32 (D3> D1). Therefore, in a state where the first pipe body 22 and the second pipe body 24 are connected by the pipe joint 26 (connected state), when the operation unit 20 is pulled up in the axial direction X, the operation unit 20 is expanded. The upward movement is restricted at the position where the cover 28 and the lid 32 contact each other. As described above, the enlarged diameter portion 28 functions as the stopper portion 29 that regulates the displacement range of the operation portion 20 in the axial direction X.

  As shown in FIG. 2, the operation unit 20 has a single tubular shape in which the first tubular body 22 and the second tubular body 24 are connected by a pipe joint 26 and inserted from one end to the other end as a whole. In other words, the operation unit 20 has an end on the side taken out of the water storage device 10 as the water supply port 36, an end on the side arranged inside the water storage device 10 as the discharge port 38, and a water supply pipe. Function. Thereby, the operation unit 20 can take in the stored water from the water supply port 36, discharge the water from the discharge port 38, and supply the stored water to the inside of the water storage device 10. Further, the water supply port 36 of the operation unit 20 functions as a port for connecting the water supply pump 82 or a receiving port.

  As shown in FIG. 5A, in a state where the second pipe 24 is detached from the first pipe 22 (separated state), the first pipe 22 connected to the pipe joint 26 and the closing portion 18 is It is arranged below the opening 31. In other words, in the separated state, the operation unit 20 is in a state of being housed inside the water storage device 10. In addition, the second pipe 24 removed from the first pipe 22 can be housed inside, for example, the water storage device 10 (see the phantom line in FIG. 5A). Therefore, the water storage device 10 can be in a mode in which the operation unit 20 fits inside the water storage device 10 in a normal time when the operation unit 20 does not need to be operated, and the operation unit 20 can be used when a person comes and goes. It can avoid getting in the way.

  As shown in FIG. 5B, in a state in which the second pipe 24 is attached to the first pipe 22 (connected state), an upper end of both ends of the operation unit 20 is an insertion portion of the lid 32. It is taken out of the water storage device 10 via 34. Further, in this state, when the operation of lifting the operation unit 20 upward is not performed, the closing unit 18 is disposed at a position that closes the outlet 14. Further, as described above, the operation unit 20 is a tubular body inserted in the axial direction X. Therefore, the operation unit 20 can take in water into the water storage device 10 with the upper end serving as the water supply port 36 and the lower end serving as the discharge port 38. In other words, the water storage device 10 does not need to remove the lid 32 when supplying water.

  As shown in FIG. 5C, when the operation of pulling the connected operation unit 20 upward is performed, the closing portion 18 connected to the first pipe 22 is pulled upward, and the closing portion 18 flows. The outlet 14 is displaced to a position where the outlet 14 is not closed. As a result, the outlet 14 is opened, and the water supplied into the water storage device 10 flows out of the outlet 14 into the first conduit 42.

  Further, when the closing portion 18 is displaced upward in conjunction with the operation of lifting the operation portion 20 upward, the closing portion 18 is displaced while being guided in the axial direction X by the guide portion 16a. Further, when an operation of pulling up the operation unit 20 is performed, the upward movement of the operation unit 20 is restricted at a position where the enlarged diameter portion 28 (stopper portion 29) contacts the lid 32. Therefore, it is possible to suppress the protrusion 18c (see FIG. 4) of the closing portion 18 from falling off from the guide 16a (see FIG. 4).

  As shown in FIG. 5C, the operation unit 20 can be displaced by a distance L1. In the present embodiment, the distance L1 at which the operation unit 20 can be displaced substantially matches the radial size D4 of the outlet 14. In addition, the displaceable distance L1 of the operation unit 20 can be appropriately adjusted by an engagement structure between the closing unit 18 and the mass main body 12 (for example, an engagement structure between the projection 18c and the guide 16a).

  As described above, the water storage device 10 can open the outlet 14 closed by the closing portion 18 by operating the operation unit 20. Thereby, the water storage device 10 can make the water supplied from the water storage tank 80 flow out or shut off.

  The switchable drainage mass 50 is provided so that the drainage channel C can be switched between the first channel c1 and the second channel c2. The switchable drainage mass 50 is buried in the ground outside the building 1.

  As shown in FIG. 6, the switchable drainage mass 50 has a mass main body 52, a switching member 60, an inspection tube 58, and a lid 59. When the relative position of the switching member 60 with respect to the mass body 52 is displaced, the switchable drainage mass 50 causes the drainage flow channel C to move from the first flow channel c1 to the second flow channel c2 or from the second flow channel c2 to the first flow channel. Switching to the road c1 is possible.

  The switchable drainage mass 50 of the present embodiment is formed by processing and molding a resin material such as PVC or reinforced fiber plastic. In addition, the switchable drainage mass 50 may be one in which the mass main body 52 and the inspection cylinder 58 are formed of a material such as concrete.

  As shown in FIGS. 6 and 7, the mass main body 52 is a member in which openings are formed in upper and lower portions and a plurality of substantially cylindrical portions are integrally formed. Further, two openings are formed on the side of the mass body 52. Further, as shown in FIG. 7, a step 57 is formed inside the mass body 52.

  The opening formed in the upper part of the mass body 52 is an inspection port 53. One of the two openings formed on the side of the mass body 52 is an inlet 54 for inflowing sewage, and the other is a first outlet 55 for outflow of sewage. Further, an opening formed in a lower portion of the mass main body 52 is a second outlet 56 for discharging sewage. That is, the mass main body 52 is provided with one inlet 54 and two outlets, a first outlet 55 and a second outlet 56.

  As shown in FIG. 6, the inspection port 53 is open toward the ground. An inspection port 58 is connected to the inspection port 53. The upper end of the inspection tube 58 is disposed so as to be substantially the same height as the ground. The operator can inspect the inside of the mass main body 52 for damage or clogging through the inspection cylinder 58 from the ground. Note that a lid 59 is disposed at the upper end of the inspection tube 58. The lid 59 is removable from the ground. The inspection tube 58 is closed by a lid 59. The lid 59 can prevent the odor generated from the sewage in the switchable drainage mass 50 from leaking outside through the inspection port 53.

  The inflow port 54 is a portion into which sewage flowing out of the drainage facility 3 flows. The first outlet 55 is a portion from which the sewage flowing into the mass main body 52 flows out. The first outlet 55 is provided on the side of the mass body 52 at a position facing the inlet 54.

  The second outlet 56 is a portion where the wastewater flowing into the mass main body 52 flows out, similarly to the first outlet 55. The second outlet 56 is provided at a lower portion of the mass main body 52 and opens downward. The second outlet 56 is disposed between the inlet 54 and the first outlet 55. As shown in FIG. 1, in the drainage system S, the wastewater storage tank 84 is disposed below the switchable drainage mass 50, and the second outlet 56 is connected to the wastewater storage tank 84 via the second conduit 44. It is connected. The second outlet 56 may be directly connected to the sewage storage tank 84 without using a pipe or the like.

  The switching member 60 is a member for mutually switching the drainage flow path C of the sewage to the first flow path c1 and the second flow path c2. Specifically, the switching member 60 drains the sewage discharged from the drainage facility 3 to the sewage main pipe 4 through the first flow path c1 or to the sewage storage tank 84 through the second flow path c2. It is provided for switching the drain passage C.

  The switching member 60 is housed inside the mass main body 52. The switching member 60 is detachable from a second outlet forming portion 52a formed below the mass main body 52. When the switching member 60 is fitted into the second outlet forming portion 52a, the second outlet 56 is closed. When the switching member 60 is removed from the second outlet forming section 52a, the second outlet 56 is opened.

  As shown in FIG. 7, the switching member 60 includes a main body 62, a handle 63, a fitting portion 64, and an overflow preventing plate 65.

  As shown in FIG. 7, the main body 62 is formed in a substantially U-shape in a sectional view. On both sides of the main body 62, flanges 62b are formed so as to protrude radially outward. In addition, the main body 62 includes a bottom surface 62 a that forms a flow path connected from the inflow port 54 to the first outflow port 55.

  As shown in FIG. 7, the handle 63 is provided so as to extend from the flange 62b on one end to the flange 62b on the other end, and to cross the main body 62. The fitting portion 64 is provided below the main body 62. The fitting portion 64 is a substantially cylindrical portion that can be fitted to the second outlet 56 to close the second outlet 56. In the present embodiment, a rubber seal member 64 a is provided on the outer peripheral portion of the fitting portion 64. The seal between the second outlet 56 and the fitting portion 64 of the switching member 60 is achieved by the seal member 64a. The overflow suppression plate 65 is provided to prevent the sewage from overflowing toward the first outlet 55 when the second flow path c2 is formed.

  When the fitting portion 64 of the switching member 60 is fitted into the second outlet forming portion 52a, the switchable drainage mass 50 closes the second outlet 56 to allow the sewage flowing from the inlet 54 to flow through the first outlet. Outflow from outlet 55. Specifically, as shown in FIG. 8A, when the first flow path c1 is formed so that the inflow port 54 and the first outflow port 55 communicate with each other, the switching member 60 includes 52 is maintained in a posture supported by the step 57 (not shown in FIG. 8). Thereby, the switching member 60 is arranged so as to connect the bottom surface 62a to the inflow port 54 and the first outflow port 55, and forms a substantially U-shaped drainage channel in cross-sectional view.

  The switchable drainage mass 50 displaces the position of the switching member 60 with respect to the mass main body 52 from the state in which the fitting portion 64 of the switching member 60 is fitted into the second outflow port 56, so that the drainage port of the sewage is discharged to the first outlet. The outlet 55 can be switched to the second outlet 56.

  Specifically, from the state shown in FIG. 8A, when the handle 63 of the switching member 60 is gripped and lifted upward, and the switching member 60 is displaced so as to rotate about 90 degrees in the circumferential direction, the switching member Reference numeral 60 denotes a state in which the main body 62 is supported above a step 57 (not shown in FIG. 8) of the mass main body 52 (see FIG. 8B). As shown in FIG. 8B, in a state where the main body 62 is supported by the step 57 of the mass main body 52, the bottom surface 62a is displaced upward, and the closed second outlet 56 is opened.

  In a state where the second outlet 56 is opened, the sewage flowing into the mass main body 52 from the inlet 54 falls toward the second outlet 56 before reaching the first outlet 55, and the second outlet 56 Outflow from 56. Thereby, the switchable drainage mass 50 can be switched from a state in which sewage flows out from the first outlet 55 to a state in which sewage flows out from the second outlet 56. In addition, the switchable drainage mass 50 causes the fitting portion 64 to be fitted into the second outlet forming portion 52a from the operation opposite to that described above, that is, from the state where the fitting portion 64 is removed from the second outlet forming portion 52a. In this state, it is possible to switch from a state in which sewage flows out from the second outlet 56 to a state in which sewage flows out from the first outlet 55.

  The backflow prevention mass 70 is a drainage mass provided on the downstream side of the drainage channel C with respect to the switchable drainage mass 50. The backflow prevention mass 70 may be any type of drainage mass, such as a sewage mass or a rainwater mass, as long as it is a drainage mass provided downstream of the switchable drainage mass 50. The backflow prevention mass 70 of the present embodiment is formed by processing and molding a resin material such as PVC or reinforced fiber plastic. In addition, the backflow prevention mass 70 may be one in which a mass main body or an inspection tube is formed of concrete or the like.

  As shown in FIG. 1, the backflow suppression mass 70 is provided with a backflow suppression valve 72.

  The backflow suppression valve 72 prevents backflow of sewage from the downstream side toward the upstream side. In the present embodiment, the check valve 72 is provided on the check mass 70. The configuration of the backflow suppression mass 70 is not particularly limited as long as the backflow suppression mass 70 can suppress the backflow of the wastewater from the downstream side to the upstream side.

  The check valve 72 allows the flow of sewage from the upstream side to the downstream side, and restricts the flow of sewage from the downstream side to the upstream side. The backflow suppression valve 72 is swingable with respect to the mass body of the backflow suppression mass 70 and is detachably attached. The check valve 72 closes the inflow port when the sewage does not flow. When the sewage flows from the upstream side, the check valve 72 is pushed up by the sewage. Thereby, the backflow prevention mass 70 secures a flow path when sewage flows from the upstream side. Therefore, the sewage flowing from the upstream flows into the downstream without being blocked by the check valve 72. On the other hand, when the sewage flows back into the backflow prevention mass 70, the flow of the sewage is restricted by the backflow suppression valve 72 that covers the inflow port, and the inflow to the upstream side is regulated.

  The backflow suppression valve 72 may be provided in advance on the backflow suppression mass 70, or may be detachable from the backflow suppression mass 70. For example, the check valve 72 may be attached to the check block 70 via a connecting member.

  The water storage tank 80 (water storage tank, water supply source) is a tank for storing water such as rainwater or domestic water. For example, the water storage tank 80 may store relatively clean water in which foreign substances such as drinking water are not mixed. In FIG. 1, the water storage tank 80 is buried underground as an example, but the water storage tank 80 may be installed on the ground.

  The water supply pump 82 (pump) is for transporting the water stored in the water storage tank 80 to the water storage device 10. The water supply pump 82 may be of any type, such as a positive displacement type and a non-positive displacement type, as long as it can transport the water stored in the water storage tank 80. The water supply pump 82 is prepared when the drainage system S is to function as a disaster response, for example, when the supply of water to the existing drainage equipment 3a is stopped in a disaster or the like.

  The sewage storage tank 84 is a tank for storing sewage discharged from the drainage facility 3. As shown in FIG. 1, the sewage storage tank 84 is disposed outside the building 1 and is buried underground. As shown in FIG. 1, the wastewater storage tank 84 is connected to the switchable drainage mass 50 via the second conduit 44. In the sewage storage tank 84, sewage flowing from the second outlet 56 is stored. The sewage storage tank 84 has a space sealed inside. Since the sewage storage tank 84 is of a sealed type, the odor generated from the sewage in the sewage storage tank 84 does not leak to the outside. The sewage storage tank 84 does not necessarily have to be buried underground. The sewage storage tank 84 may be installed on the ground.

<Discharge of sewage during normal operation and operation>
Next, the operation of the drainage system S during normal operation and during operation will be described with reference to FIGS.

  The drainage system S discharges the sewage flowing out of the drainage facility 3 such as the existing drainage facility 3a to the sewage main pipe 4 in a normal state (during the supply / drainage function). Further, the drainage system S supplies water to the pipeline 40 when the supply of water to the drainage facility 3 is stopped due to water cutoff or when it becomes necessary to install the temporary drainage facility 3b (when water supply is impossible). Waste water in the pipe 40. Furthermore, the drainage system S switches the drainage channel C of the switchable drainage mass 50 when the sewer main 4 or the like is damaged due to a disaster such as an earthquake or tsunami (when drainage is impossible). It is used to discharge sewage flowing out of the drainage facility 3 to a sewage storage tank 84.

<About normal times>
As shown in FIG. 9, in normal times, the drainage system S drains sewage discharged from the drainage facility 3 through the first channel c1 to the sewage main pipe 4. More specifically, in normal times, the drainage system S discharges sewage from the existing drainage facility 3a through the first flow path c1 that reaches the sewer main pipe 4 via the switchable drainage mass 50.

  Further, the water storage tank 80 is normally closed by the lid member 80a. Further, in the water storage device 10, the operation unit 20 is in a separated state. More specifically, the operation unit 20 of the water storage device 10 is stored in a predetermined place such as the inside of the water storage device 10 with the second pipe 24 removed from the first pipe 22 (see FIG. )reference). For this reason, the drainage system S is configured to fit the operation unit 20 inside the water storage device 10 in a normal state when it is not necessary to operate the operation unit 20 of the water storage device 10 and operate the operation unit 20 when a person travels on the ground. The part 20 can be kept out of the way. When the second pipe 24 is housed inside the water storage device 10, the loss of the second pipe 24 can be suppressed.

<About operation>
When the water supply is impossible, the drainage system S can cause the stored water to flow from the water storage tank 80 into the pipeline 40 and discharge the wastewater in the pipeline 40 to the downstream side.

  As shown in FIG. 10, when water supply is impossible, a water supply pump 82 that transports stored water from the water storage tank 80 to the water storage device 10 is prepared. In addition, a temporary drainage facility 3b is provided as necessary in the event of a disaster or the like. Further, as shown in FIG. 11A, when water cannot be supplied from the drainage system S and water needs to be supplied from a water supply source such as the water storage tank 80 (during operation), a predetermined location or water storage is required. The second tube 24 accommodated inside the device 10 is prepared, and the operation unit 20 is brought into a state where the first tube 22 and the second tube 24 are connected (connected state).

  When the sewage is discharged from the existing drainage facility 3a or the temporary drainage facility 3b and the sewage accumulates in the pipe 40 and needs to be discharged, the stored water is transferred from the water storage tank 80 to the pipe 40 via the water storage device 10. Inflow and flushes sewage downstream.

  More specifically, during operation, first, the stored water flows into the water storage device 10 with the outlet 14 of the water storage device 10 closed (see FIG. 11A). At this time, the water storage device 10 can supply the stored water by connecting the water supply pump 82 to the water supply port 36 of the operation unit 20 while closing the opening 31 with the lid 32. In addition, the water storage device 10 can temporarily store a predetermined amount of water inside. In other words, the water storage device 10 can store water for flushing the sewage in the pipeline 40 at a stroke.

  As shown in FIG. 11B, after the stored water in the water storage device 10 reaches a certain amount, the operation unit 20 is pulled up to displace the closing portion 18 that has closed the outlet 14 upward. . As a result, the outlet 14 is opened, and the stored water in the water storage device 10 flows into the pipeline 40 at a stretch, and conveys the sewage in the pipeline 40 to the downstream side. In this way, the drainage system S can send the stored water to the pipeline 40 in the case of water cutoff or the like, and flush the wastewater in the pipeline 40 from the upstream side to the downstream side.

  Further, as described above, the water storage device 10 can perform an operation of pulling the operation unit 20 upward in a state where the upper end of the operation unit 20 is arranged outside the water storage device 10. Further, as described above, the water storage device 10 is provided with the stopper portion 29. Therefore, in the water storage device 10, the operation unit 20 is excessively displaced upward to cause the closing portion 18 to fall off the mass main body 12, or the second pipe 24 to come off the lid 32 to the outside of the water storage device 10. Can be suppressed.

  Furthermore, the opening / closing operation of the outlet 14 of the water storage device 10 can be performed by the above-described extremely simple operation. Therefore, even those who do not have specialized knowledge can easily open and close the water storage device 10.

  In addition, when it is difficult to discharge sewage to the sewage main pipe 4 due to breakage of the sewage main pipe 4 or the like at the time of disaster (when drainage is impossible), the drainage system S is connected to the sewage main pipe. It is desirable to switch the drainage flow path C to switch from 4 to the wastewater storage tank 84.

  The switching operation of the drain passage C can be performed, for example, as follows. First, the worker removes the lid 59 put on the inspection tube 58 from the inspection tube 58. Next, the switching member 60 is pulled up by grasping the handle 63 of the switching member 60, and the switching member 60 is rotated about 90 degrees in the circumferential direction. As a result, the switching member 60 is held above the mass main body 52, and the second outlet 56 is maintained in an open state (see FIG. 8B). If the operator cannot reach the handle 63, the switching member 60 may be pulled up by hooking the hook on the handle 63 using, for example, a rod having a hook at the tip.

  When the drainage channel C is switched to the second channel c2, the sewage flowing out of the drainage facility 3 flows into the mass main body 52 from the inlet 54 of the switchable drainage mass 50. At this time, since the second outlet 56 is open from the switching member 60 and the second outlet 56 is formed at the lower part of the mass main body 52, the sewage flowing into the mass main body 52 is It falls to the outlet 56 and flows out of the mass body 52. The sewage flowing out from the second outlet 56 is discharged to a sewage storage tank 84. Thereby, the drainage system S drains the sewage discharged from the drainage facility 3 to the sewage storage tank 84 when drainage to the sewage main pipe 4 is difficult (when drainage is impossible).

  As described above, the drainage system S allows the stored water to flow into the pipeline 40 to discharge the sewage to the downstream side when the supply of water is impossible, and further switches the drainage channel C to the sewage storage tank 84 when the drainage is impossible. Can be discharged. In other words, the drainage system S can replace the function of water supply and drainage when the sewerage becomes incapable of water supply and drainage.

  Although the water storage device and the drainage system S according to the embodiment of the present invention have been described above, the present invention is not limited to the above embodiment.

  In the operation unit 20 of the water storage device 10 according to the above-described embodiment, an example in which the first pipe 22 and the second pipe 24 are connected via the pipe joint 26 has been described. , But is not limited to this. For example, the water storage device of the present invention may be one in which the first pipe and the second pipe are directly connected by a screwing structure.

  Further, in the drainage system S according to the above-described embodiment, an example in which the water storage device 10 is provided on the upstream side of the existing drainage facility 3a has been described, but the drainage system of the present invention is not limited to the above-described embodiment. For example, the drainage system of the present invention is configured to discharge sewage discharged from the temporary drainage facility 3b while discharging sewage discharged from the existing drainage facility 3a with water supplied from a normal water pipe when water supply is functioning. It may be used for supplying and draining water from a water supply source (for example, a water storage tank) other than the water pipe. In that case, the water storage device of the present invention may be provided downstream of the existing drainage facility 3a. Further, the drainage system of the present invention may be provided with a plurality of water storage devices.

  In addition, the water storage device 10 and the switchable drainage mass 50 of the drainage system S according to the above-described embodiment have been described as being formed by processing and molding a resin material, but the present invention is not limited thereto. As described above, in the drainage system of the present invention, the mass body of the water storage device 10 and the mass body of the switchable drainage mass may be made of concrete.

  Furthermore, in the drainage system S according to the above-described embodiment, an example in which the wastewater storage tank 84 is provided is shown, but the drainage system of the present invention is not limited to this. For example, when draining sewage through the second flow path, the drainage system of the present invention may discharge sewage to a separate sewage main line from the sewage main line 4, or may discharge sewage to other drainage lines. It may be discharged.

  The drainage system of the present invention can be suitably adopted as a drainage system for draining sewage.

3 Drainage Facility 3b Temporary Drainage Facility 10 Water Reservoir 14 Outflow Port 18 Closure Portion 20 Operation Portion 22 First Pipe 24 Second Pipe 26 Fitting 28 Enlarged Diameter 29 Stopper 32 Lid 34 Insertion 36 Water Supply 38 Discharge Exit 40 Pipe 42 First pipe (Pipe)
44 Second pipe (pipe)
48 Vertical pipe 50 Switchable drainage mass 80 Water storage tank (water supply source, water storage tank)
84 Sewage storage tank S Drainage system X Axial direction C Drainage channel c1 First channel (drainage channel)
c2 Second channel (drain channel)

Claims (9)

A water storage device disposed on a conduit forming a drainage channel for draining sewage,
A water storage device main body formed in a cylindrical shape and provided with an outlet for letting out water introduced therein,
A closing portion capable of closing the outlet,
A lid that closes an opening formed to communicate with the inside at one axial end of the water storage device main body,
By closing the outlet with the closing portion, water can be stored inside the water storage device main body,
By moving the closing portion to a position separated from the outlet, the outlet can be opened, and water stored in the water storage device main body can be discharged,
It is tubular and has an operation unit connected to the closing unit,
By inserting the operating portion into the insertion portion provided in the lid, the operating portion is held so as to be slidable in the axial direction of the water storage device main body,
In a state where the outlet is closed by the closing portion, the end on the water supply port side projects outside the water storage device main body, and the end on the discharge port side opens inside the water storage device main body. A water storage device characterized by being held. The operation unit is
A first pipe attached to the closing portion,
A second pipe connected to the first pipe,
In a state where the first pipe and the second pipe are connected, the first pipe and the second pipe have a length from the outlet to the outside of the water storage device,
2. The water storage device according to claim 1, wherein the first tube fits inside the water storage device in a state where the second pipe is detached from the first tube. 3.   The water storage device according to claim 1, further comprising a stopper that regulates a displacement range of the operation unit. The operation unit includes:
A first pipe attached to the closing portion,
A second tube connected to the first tube,
And a pipe joint for connecting the first pipe and the second pipe,
The water storage device according to claim 3, wherein the stopper is formed by the pipe joint. The stopper portion is formed so as to protrude in a radial direction of the operation portion,
5. The water storage device according to claim 3, wherein movement of the operation unit in the axial direction is restricted at a position where the operation unit contacts the stopper unit and the lid body. 6. A water storage device according to any one of claims 1 to 5,
A pipe forming a drainage channel for draining sewage;
Having a water supply source,
The drainage system, wherein the water storage device is provided on the pipeline and downstream of the water supply source. One or more standing pipes provided on the conduit,
Having a temporary drainage facility temporarily attached to at least one of the standing pipes,
The drainage system according to claim 6, wherein a standing pipe provided with the temporary drainage facility is provided on the pipeline and downstream of the water storage device. A sewage storage tank capable of storing sewage,
Having a switchable drainage mass capable of switching the drainage flow path,
The operation according to claim 6 or 7, wherein an operation is performed on the switchable drainage mass so that the drainage flow path can be switched so as to discharge wastewater toward the wastewater storage tank. Drainage system. The water supply source is a water storage tank capable of storing water,
Having a pump for pumping water from the water tank,
The drainage system according to any one of claims 6 to 8, wherein stored water supplied via the pump is supplied from the water supply port to the inside of the water storage device.

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