JP2022118275A - Water storage device and drainage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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

COPYRIGHT: (C)2022,JPO&INPIT

Description

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

Conventionally, sewage drainage systems are known for discharging sewage from a drainage facility to a sewage main. Drainage facilities include, for example, toilets, baths, or kitchen sinks. This type of sewage drainage system comprises a pipeline connecting the drainage system with a sewer main. Sewage from the drainage system is discharged to the sewer main through the pipeline.

By the way, when a disaster such as a large-scale earthquake or tsunami occurs, there is a possibility that the supply of water to the drainage facility will become impossible, resulting in a water outage or the like. In addition, in order to solve the shortage of drainage facilities such as toilets in the event of a disaster, temporary drainage facilities such as simple toilets may be installed in addition to existing toilets.

Such a temporary drainage system can be installed using a standpipe installed in an existing pipeline. Sewage discharged from the temporary drainage system can be stored in the pipeline up to a predetermined amount, and after reaching the predetermined amount, the valve on the downstream side can be opened to discharge the sewage.

Here, when the valve is opened to discharge the sewage, it is conceivable that a person other than a person with specialized knowledge may be required to perform the work. Therefore, it is desirable that the operation of opening the valve can be easily performed by a person who does not have specialized knowledge. As a technique related to such an emergency valve opening operation, Patent Document 1 below discloses a drainage system for a temporary toilet. In the drainage system of Patent Literature 1, it is supposed that a water storage gate provided in a manhole can be opened without removing the manhole cover.

JP 2017-127645 A

However, the drainage system of Patent Literature 1 can only open the valve located downstream of the temporary toilet after the sewage reaches a predetermined amount. In other words, the drainage system of Patent Literature 1 only allows sewage to flow down to the sewer main regardless of whether the sewer can be supplied or not.

Also, for the purpose of allowing a person without specialized knowledge to easily open and close the outflow port in the event of a disaster, etc., a configuration such as providing an electric switch is also conceivable. However, in the event of a disaster, it is assumed that all lifelines, such as the supply of water and electricity, will stop. Therefore, it is desirable that equipment that is assumed to be used in the event of a disaster should be able to be operated manually without requiring a power source.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a water storage device and a drainage system capable of easily opening and closing a water outlet for draining sewage.

The water storage device of the present invention provided to solve the above-mentioned problems is arranged on a pipe line forming a drainage channel for draining sewage, is formed in a cylindrical shape, and the water introduced inside a water storage device main body provided with an outflow port for flowing out the water, a closing portion capable of closing the outflow port, and an opening formed so as to communicate with the inside of the water storage device main body at one end in the axial direction of the water storage device body. and a lid, by closing the outflow port with the closing portion, water can be stored inside the main body of the water storage device, and by moving the closing portion to a position away from the outflow port, the flow An outlet is opened to allow the water stored in the main body of the water storage device to flow out. By inserting the operation portion into the portion, the operation portion is held so as to be slidable in the axial direction of the water storage device main body, and the water supply port is closed in the state where the outflow port is closed by the closing portion. It is characterized in that the end on the discharge port side is held so as to open inside the main body of the water storage device while the end on the side protrudes to the outside of the main body of the water storage device.

According to the water storage device of the present invention, the outflow port can be opened and closed while the water storage device is closed by the lid. Therefore, in the water storage device of the present invention, it is not necessary to remove the cover to open and close the outflow port, and even a person without specialized knowledge can easily open and close the outflow port. Further, in the water storage device of the present invention, since the operation portion is a tubular member, water can be supplied from the outside to the inside of the water storage device through the operation portion while the water storage device is closed by the lid. . Therefore, in the water storage device of the present invention, the operation of opening and closing the outflow port and the operation of supplying water can be easily performed while the lid is closed. Furthermore, the water storage device of the present invention allows manual operation of opening and closing the outflow port. Therefore, the water storage device of the present invention can open and close the outflow port even when the supply of electricity is stopped. In addition, in the present invention, the opening formed so as to communicate with the interior at one end side of the water storage device main body in the axial direction may be an opening provided in the water storage device main body itself, but it may be connected to the water storage device main body. It may be an opening formed in another cylinder (such as an inspection cylinder 30 to be described later).

In the water storage device of the present invention, the operation part includes a first tubular body attached to the closing part and a second tubular body connected to the first tubular body, and the first tubular body and the second tubular body are connected to the first tubular body. In a state where the tubular bodies are connected, it has a length from the outlet to the outside of the water storage device, and in a state where the second tubular body is removed from the first tubular body, the first tubular body can be accommodated inside the water storage device.

According to the above-described configuration, the second tubular body of the operation part is normally removed from the first tubular body, and the operation part is housed inside the water storage device so as not to protrude outside of the water storage device. The first pipe member and the second pipe member can be connected and used when an opening/closing operation is required. As a result, the water storage device of the present invention can prevent the operation portion from protruding from the water storage device and interfering with people's comings and goings during normal times, while allowing the operation portion to function in the event of a disaster or the like.

Moreover, it is desirable that the water storage device of the present invention has a stopper portion that regulates the displacement range of the operation portion.

According to the above configuration, it is possible to regulate the displacement range of the closing portion by operating the operation portion within an appropriate range. In other words, according to the water storage device of the present invention, it is possible to prevent problems such as excessive displacement of the operation portion and detachment of the operation portion to the outside of the water storage device, or detachment of the blocking portion from the outflow port.

Furthermore, in the water storage device of the present invention, the operation part includes a first tubular body attached to the closing part, a second tubular body connected to the first tubular body, the first tubular body and the second tubular body A pipe joint for connecting pipe bodies may be provided, and the stopper portion may be formed in the pipe joint.

According to the above configuration, the pipe joint can function as a stopper. Thereby, the water storage device of the present invention does not need to additionally provide a part for functioning as a stopper portion, and it is possible to suppress an increase in the number of parts.

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 positioned at a position where the stopper portion and the lid body abut against each other. Axial movement may be restricted.

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

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

According to the above-described configuration, the first tubular body and the second tubular body can be separated and connected, and the first tubular body and the second tubular body can be connected without dividing the flow path penetrating the entire operation section. can be done.

Further, in the water storage device of the present invention, the operation part includes a first tubular body attached to the closing part, a second tubular body connected to the first tubular body, the first tubular body and the second tubular body a pipe joint for connecting pipe bodies, wherein the first pipe body is screwed and connected to the pipe joint by rotating it in the circumferential direction relative to the front pipe joint. may

According to the above-described configuration, while the first tubular body and the second tubular body are separable and connectable, the first tubular body is inserted through the insertion portion of the lid and then rotated, whereby the disassembled operation is performed. parts can be concatenated. As a result, in the water storage device of the present invention, it is possible to easily connect the operation portion.

The drainage system of the present invention includes the above-described water storage device, a pipeline forming a drainage channel for draining sewage, and a water supply source, and the water storage device is located on the pipeline and is higher than the water supply source. It is characterized by being provided downstream.

According to the drainage system of the present invention, it is possible to supply water from a water supply source and wash away the sewage in the pipeline for drainage. Further, according to the drainage system of the present invention, the opening and closing operation of the outflow port of the water storage device can be performed in a state where the water storage device is closed by the lid. Therefore, in the drainage system of the present invention, it is not necessary to remove the cover to open and close the outflow port of the water storage device, and even a person without specialized knowledge can easily open and close the outflow port. can. Further, in the drainage system of the present invention, since the operation portion of the water storage device is a tubular member, water is supplied from the outside to the inside of the water storage device through the operation portion while the water storage device is closed by the lid. can do. Therefore, in the drainage system of the present invention, the operation of opening and closing the outflow port and the operation of supplying water can be easily performed while the lid is closed. Furthermore, the water storage device of the drainage system of the present invention allows manual operation of opening and closing 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 more standing pipes provided on the pipeline, and a temporary drainage facility temporarily attached to at least one of the standing pipes. A pipe may be provided on the pipeline and downstream of the water storage device.

According to the above-described configuration, it is possible to install a temporary drainage facility such as a temporary toilet by utilizing the existing vertical pipe in the event of a disaster or the like. Moreover, according to the above-mentioned structure, the sewage discharged from the temporary drainage system can be flushed and drained by the water supplied from the water supply source.

The drainage system of the present invention has a sewage storage tank capable of storing sewage, and a switchable drainage trough capable of switching the drainage channel. , the drainage channel may be switchable so as to discharge sewage toward the sewage storage tank.

According to the above configuration, when the main sewage pipe or the pipeline downstream of the switching mass is damaged, the sewage discharge destination can be switched to the sewage storage tank and the sewage can be discharged. That is, according to the drainage system of the present invention, when the sewage water supply is stopped and the water supply is disabled, and the drainage toward the sewage main pipe does not work (when water supply and drainage are disabled), etc., the function of water supply and drainage is replaced to sewage can be drained.

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

According to the above configuration, it is possible to efficiently drain the sewage by utilizing the water stored in the water tank.

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

It is a schematic diagram which shows the drainage system of this invention. It is a sectional view showing a water storage device of the present invention. 3 shows a mass body, a closing part, and an operation part of the water storage device of FIG. 2; (a) is a plan view, (b) is a left side view, (c) is a sectional view taken along line A-A' of FIG. 3(b), and (d) is a right side view. Figure 3 is an exploded perspective view of the water storage device of Figure 2; FIG. 3 is a cross-sectional view showing the state of the operation part of the water storage device of FIG. 2 and the operation part when the operation part is operated; (a) shows the separated state, (b) shows the connected state, and (c) shows the state in which the operating portion is pulled up. Figure 2 is a cross-sectional view showing a switchable drainage basin of the drainage system of Figure 1; FIG. 7 is a perspective view showing a mass body and a switching member of the switchable drainage mass of FIG. 6; FIG. 7 is a cross-sectional view taken along the line B-B' of FIG. 7 showing the mass body and switching member of the switchable drainage mass of FIG. 6; (a) shows the state in which the first channel is formed, and (b) shows the state in which the second channel is formed. FIG. 2 is a schematic diagram showing a normal state of the drainage system of FIG. 1; FIG. 2 is a schematic diagram showing the operation of the drainage system of FIG. 1; 11 is a cross-sectional view showing the operation of the water storage device of the drainage system of FIG. 10; FIG. (a) shows a state in which the outlet is closed and stored water is supplied, 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 showing water storage device 10 according to an 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 the drainage system>
The drainage system S discharges sewage discharged from the drainage facility 3 toward the downstream side of the main sewage pipe 4 and the like.

More specifically, the drainage system S operates when the water supply to the drainage facility 3 is functioning (during the water supply function) and when the drainage to the sewage main pipe 4 is functioning (drainage When functioning), sewage discharged from the drainage facility 3 is discharged toward the downstream side of the sewage main pipe 4 or the like.

In addition, the drainage system S can be used as a temporary toilet when the water supply to the drainage facility 3 stops functioning due to a disaster such as an earthquake (water cutoff), or in places such as outdoors where the water supply facility is insufficient. When the water supply function is insufficient (when water supply is not possible) due to the installation of such as, stored water is supplied to the pipeline 40 to be described later, and sewage is discharged downstream.

Furthermore, when the main sewage pipe 4 or a part of the pipe line 40 is damaged and it is difficult to drain the sewage to the main sewage pipe 4 (drainage is impossible), the sewage system S drains the sewage into the sewage storage tank. 84 can be discharged.

That is, when the water supply is not possible and the drainage is not possible (during the water supply/drainage failure), the drainage system S supplies the stored water to the pipeline 40 to discharge the sewage, and the sewage discharged from the drainage facility 3 It is allowed to drain toward the reservoir 84 .

In the following explanation, the case where the water supply to the drainage facility 3 is functioning and the case where the drainage to the sewage main pipe 4 is functioning is referred to as "during water supply and drainage function" or "normal time". It may be described and explained. Further, when water cannot be supplied and it is necessary to supply water from a water supply source such as the water storage tank 80, this may be described as "during operation".

The sewage main 4 is a pipe that leads sewage to a sewage treatment plant (not shown). Sewage flowing out of the drainage system 3 of the building 1 is normally discharged to the main sewage pipe 4 .

In addition, in FIG. 1, the configuration of the drainage system S, such as the temporary drainage facility 3b and the water supply pump 82 to be described later, which is provided during operation is indicated by phantom lines.

“Drainage system” means a facility for discharging sewage. "Drainage equipment" includes, for example, a toilet, a bath or a kitchen sink. Moreover, among the "drainage facilities", drainage facilities such as toilets and baths that are already installed in the building 1 may be described as "existing drainage facilities 3a". Moreover, among the "drainage facilities", drainage facilities such as temporary toilets provided outside the building 1 may be described as "temporary drainage facilities 3b".

A "building" refers to a building having at least walls, and includes residences, commercial facilities, factories, school buildings, warehouses, and the like. In addition, "indoor" includes not only the space above the floor surrounded by the roof and walls, but also the space under the floor. In a plan view, the portion surrounded by walls is “inside the building”.

"Sewage" is, for example, water discharged from toilets, baths, kitchen sinks, etc., and cannot be discharged into rivers as it is.

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

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

In the following description, the sewage main pipe 4 or the sewage storage tank 84 side of the sewage flow path is simply referred to as "downstream side", and the side opposite to the downstream side where the water storage tank 80 described later is provided may be described simply as "upstream".

Also, the term "drainage basin" as used herein includes various drainage basins such as sewage basins, rainwater basins, and public basins. In this specification, the term "drainage basin" includes not only the main body of the basin, but also an inspection tube, a standpipe, and a lid.

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 basin 50, a backflow prevention basin 70, and a sewage storage basin 84. . In addition to these components, the drainage system S is provided with a water supply pump 82 (pump) and a temporary drainage facility 3b during operation. Each configuration will be described below with reference to the drawings.

The pipeline 40 is connected with a plurality of pipe members, joints, etc. to form a drainage channel C that serves as a flow channel for sewage. In addition, a "pipeline" means the channel|path which distribute|circulates water. A "pipe line" may be configured by a single pipe, or may be configured by a plurality of pipes and joints connecting them as in the present embodiment. Also, the term “drainage channel” means a route along which water (wastewater, etc.) is discharged.

As shown in FIG. 1 , the pipeline 40 includes a first pipeline 42 and a second pipeline 44 . Further, a plurality of stand pipes 48 are provided in the pipeline 40 . A water storage device 10 , a switchable drainage mass 50 and a backflow prevention mass 70 are arranged in the pipeline 40 .

The first pipeline 42 is provided so as to extend from the water storage device 10 to the sewage main pipe 4 . Also, the second pipe line 44 is provided so as to extend from the switchable drainage basin 50 to the sewage storage tank 84 . The pipeline 40 is capable of forming two systems as a sewage drainage flow path C with the first pipeline 42 and the second pipeline 44 . Specifically, the conduit 40 includes a first flow path c1 that discharges wastewater to the sewage main 4 via the first conduit 42 and discharges wastewater to the sewage reservoir 84 via the second conduit 44. A second flow path c2 can be formed.

In other words, the pipe line 40 forms the first flow path c1 as the normal drainage flow path C for discharging sewage to the sewage main pipe 4 through the first flow path c1. In addition, when the pipeline 40 cannot be discharged, sewage may flow back to the upstream side, such as when the main sewage pipe 4 or the first pipeline 42 on the downstream side of the branched portion with the second pipeline 44 is damaged. A second flow path c2 for discharging waste water to the waste water storage tank 84 is formed as a waste water flow path C for the waste water.

A standpipe 48 is provided on the pipeline 40 . More specifically, the standpipe 48 is provided in a drainage basin 47 provided in the pipeline 40 . Note that the standpipe 48 may be connected to the pipeline 40 via a joint instead of being provided in the drainage basin. Also, the drainage basin provided with the standpipe 48 can be selected from various types such as a sewage basin, a rainwater basin, and the like.

The standpipe 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 system 3b can be attached to the upper end of the standpipe 48. As shown in FIG. When the temporary drainage system 3b is not installed, such as during normal times other than disasters, the opening at the upper end of the standpipe 48 is covered with a lid 49 and closed. In addition, when the temporary drainage system 3b is installed, such as in the event of a disaster, the lid 49 is removed from the opening of the standpipe 48, and the temporary drainage system 3b is attached. A lower end of the standpipe 48 is connected to the first pipeline 42 .

Note that FIG. 1 shows an example in which the temporary drainage system 3b is provided on the standpipe 48 provided downstream of the existing drainage system 3a, but the temporary drainage system 3b is located upstream of the existing drainage system 3a. It may be provided on the standpipe 48 . For example, when a standpipe 48 is provided on the upstream side of the existing drainage system 3a and on the downstream side of the water storage device 10, the temporary drainage system 3b may be provided on the standpipe 48.

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

As shown in FIGS. 2 and 4 , the water storage device 10 has a mass body 12 , a closing portion 18 , an operation portion 20 , an inspection tube 30 and a lid 32 .

The water storage device 10 has a tubular inspection tube 30 attached to the mass body 12, and has a substantially tubular shape with one end closed in the longitudinal direction and an opening 31 formed in the other end. It has a hollow shape. A lid 32 is detachably fitted in the opening 31 .

The water storage device 10 is buried in the ground so that the opening 31 faces upward and the end opposite to the opening 31 faces downward and the longitudinal direction extends vertically. In the following description, the longitudinal direction of the water storage device 10 may be simply referred to as "axial direction X". Further, of 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 side as simply "lower" in some cases.

As shown in FIGS. 3 and 4, the mass body 12 is a substantially tubular member with an upper opening and a closed lower part. As shown in FIG. 4, an outflow port 14 is provided on the side of the mass body 12 . A first pipeline 42 is connected to the outflow port 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 this embodiment, the outflow port 14 is a socket, but the outflow port 14 may be a spigot. Also, the outflow port 14 may be directly connected to the first pipeline 42 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. As shown in FIG. 4, the guide portion 16a is groove-shaped unevenness extending in the axial direction X. As shown in FIG. In this embodiment, the guide portion 16 a is formed in a guide portion forming body 16 that is separate from the mass body 12 . In this embodiment, a guide portion 16 a is formed in the mass body 12 by attaching the guide portion forming body 16 to the mass body 12 . The guide portion 16a may be formed directly on the mass body 12. As shown in FIG.

As shown in FIG. 4, the guide portion base 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 body 12, and has a hole portion 16d formed substantially in the center. Further, the fitting portion 16c is formed so as to surround the hole portion 16d formed in the mounting portion 16b. The guide portion forming body 16 is attached to the mass body 12 with the attachment portion 16b attached to the inner wall surface of the mass body 12 and the fitting portion 16c fitted inside the outflow port 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 , the cover 32 is provided with an insertion portion 34 . The insertion portion 34 is provided to allow the operation portion 20 to be inserted from the inside to the outside of the water storage device 10 . In the present embodiment, the insertion portion 34 is a through hole penetrating through substantially the center of the lid 32 . As shown in FIG. 4, the insertion portion 34 has a substantially circular shape with a diameter D1. Note that 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 be a through hole formed in the lid 32 as in the present embodiment, or may have a shape obtained by cutting out a portion of the lid 32 .

A blocking portion 18 is provided to block the outflow port 14 . As shown in FIG. 4, the closing portion 18 has a sliding portion 18a and a connecting portion 18b. The sliding portion 18 a is slidable with respect to the mounting portion 16 b of the guide portion base 16 . The connecting portion 18b has a shape that protrudes radially inward of the water storage device 10 from the sliding portion 18a. A mounting hole 18d is provided in the connecting portion 18b. A projecting portion 22a provided on a first tubular body 22 of the operation portion 20, which will be described later, is fitted into the attachment hole 18d of the connecting portion 18b, and the first tubular body 22 is attached.

The sliding portion 18a is provided with a protruding portion 18c linearly extending along the axial direction X. As shown in FIG. The closing portion 18 is attached to the guide portion forming body 16 so that the convex portion 18c and the guide portion 16a are engaged with each other. Further, the closing portion 18 is guided in the axial direction X by the fitting structure of the convex portion 18c and the guide portion 16a, and is slidably displaceable with respect to the mass body 12. As shown in FIG.

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

The first tubular body 22 and the second tubular body 24 are tubular members. The first tubular 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 portion 18 by fitting the projecting portion 22 a into the attaching hole 18 d of the closing portion 18 .

As shown in FIG. 4, the second tubular body 24 has an outer diameter of D2. 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 tubular body 22 and the second tubular body 24 in a separable manner. The pipe joint 26 of the present embodiment is a so-called conversion joint that can connect two tubular bodies having different radial sizes. As shown in FIG. 4 , the pipe joint 26 has an enlarged diameter portion 28 with an outer diameter D3 larger than the outer diameter D2 of the second tubular body 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 tubular body 22 and the second tubular body 24 are connected by the pipe joint 26 (connected state), when the operating portion 20 is pulled upward along the axial direction X, the operating portion 20 becomes an enlarged diameter portion. The upward movement is restricted at the position where 28 and lid 32 abut. Thus, the expanded diameter portion 28 functions as a stopper portion 29 that regulates the displacement range of the operation portion 20 in the axial direction X. As shown in FIG.

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

As shown in FIG. 5(a), in a state (separated state) in which the second tubular body 24 is removed from the first tubular body 22, the first tubular body 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 operating part 20 is housed inside the water storage device 10 . Moreover, the second tubular body 24 removed from the first tubular body 22 can be housed inside the water storage device 10, for example (see the phantom line in FIG. 5(a)). Therefore, the water storage device 10 can be configured such that the operation portion 20 can be accommodated inside the water storage device 10 when there is no need to operate the operation portion 20, and the operation portion 20 can be placed inside the water storage device 10 when people come and go. You can avoid getting in the way.

As shown in FIG. 5B, when the second tubular body 24 is attached to the first tubular body 22 (connected state), the upper end of the operating portion 20 is the insertion portion of the lid 32. 34 to the outside of the water storage device 10 . Further, in this state, the closing portion 18 is arranged at a position to close the outflow port 14 when the operation portion 20 is not lifted upward. Furthermore, as described above, the operation part 20 is a tubular body inserted in the axial direction X. As shown in FIG. Therefore, the operation unit 20 can take water into the water storage device 10 by using the upper end as the water supply port 36 to take in water and the lower end 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. 5(c), when the operating portion 20 in the connected state is pulled upward, the blocking portion 18 connected to the first tubular body 22 is pulled upward, causing the blocking portion 18 to flow. It is displaced to a position where the outlet 14 is not blocked. As a result, the outflow port 14 is opened and the water supplied to the inside of the water storage device 10 flows out from the outflow port 14 to the first conduit 42 .

Further, when the closing portion 18 is displaced upward in conjunction with the operation of pulling up the operating portion 20, the closing portion 18 is displaced while being guided in the axial direction X by the guide portion 16a. Further, when the operating portion 20 is pulled upward, the upward movement of the operating portion 20 is restricted at the position where the expanded diameter portion 28 (stopper portion 29 ) contacts the lid 32 . Therefore, it is possible to prevent the convex portion 18c (see FIG. 4) of the closing portion 18 from coming off the guide portion 16a (see FIG. 4).

As shown in FIG. 5(c), the operation unit 20 can be displaced by a distance L1. In the present embodiment, the distance L1 over which the operation portion 20 can be displaced and the radial size D4 of the outflow port 14 approximately match. The displaceable distance L1 of the operating portion 20 can be appropriately adjusted by the engagement structure between the closing portion 18 and the mass body 12 (for example, the engagement structure between the convex portion 18c and the guide portion 16a).

In this manner, the water storage device 10 can open the outflow port 14 blocked by the blocking portion 18 by operating the operation portion 20 . As a result, the water storage device 10 can cause or block the water supplied from the water storage tank 80 .

The switchable drain mass 50 is provided to switch the drain channel C between the first channel c1 and the second channel c2. The switchable drainage basin 50 is buried in the ground outside the building 1. - 特許庁

As shown in FIG. 6 , the switchable drainage basin 50 has a basin body 52 , a switching member 60 , an inspection tube 58 and a lid 59 . In the switchable drainage basin 50, by displacing the relative position of the switching member 60 with respect to the basin body 52, the drainage channel C is changed from the first channel c1 to the second channel c2 or from the second channel c2 to the first channel. It is possible to switch to the path c1.

The switchable drainage basin 50 of this embodiment is made by processing and molding a resin material such as vinyl chloride or reinforced fiber plastic. Note that the switchable drainage basin 50 may have the basin body 52 and the inspection tube 58 made of a material such as concrete.

As shown in FIGS. 6 and 7, the mass body 52 is a member integrally formed with a plurality of substantially cylindrical portions having openings in the upper and lower portions. Two openings are formed in the sides of the mass body 52 . Furthermore, as shown in FIG. 7, a stepped portion 57 is formed inside the mass body 52 .

An opening formed in the upper portion of the mass body 52 serves as an inspection port 53 . Further, of the two openings formed in the side portion of the mass body 52, one serves as an inflow port 54 for inflow of sewage, and the other serves as a first outflow port 55 for outflow of sewage. Further, an opening formed in the lower portion of the mass body 52 serves as a second outflow port 56 for outflowing sewage. That is, the mass 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 opening 53 opens toward the ground. An inspection tube 58 is connected to the inspection port 53 . The upper end of the inspection cylinder 58 is arranged so as to be approximately the same height as the ground. An operator can inspect the interior of the mass body 52 for damage or clogging through the inspection tube 58 from the ground. A lid 59 is arranged at the upper end of the inspection cylinder 58 . The lid body 59 can be removed from the ground. The inspection tube 58 is closed with a lid 59 . The lid body 59 can prevent the bad smell generated from the sewage in the switchable drainage basin 50 from leaking to the outside through the inspection port 53 .

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

The second outflow port 56 is, like the first outflow port 55, a portion through which sewage that has flowed into the mass body 52 flows out. The second outflow port 56 is provided in the lower portion of the mass body 52 and opens downward. The second outlet 56 is arranged between the inlet 54 and the first outlet 55 . As shown in FIG. 1, the drainage system S includes a sewage reservoir 84 located below the switchable drainage basin 50 and a second outlet 56 leading to the sewage reservoir 84 via the second conduit 44. It is connected. Note that the second outflow port 56 may be directly connected to the sewage storage tank 84 without a pipe or the like.

The switching member 60 is a member for switching the sewage drainage channel C between the first channel c1 and the second channel c2. Specifically, the switching member 60 allows the sewage that has flowed out of the drainage facility 3 to be drained 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 drainage channel C.

The switching member 60 is housed inside the mass body 52 . Also, the switching member 60 is detachable from the second outlet forming portion 52a formed below the mass body 52. As shown in FIG. 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 portion 52a, the second outlet 56 is opened.

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

As shown in FIG. 7, the body portion 62 is formed in a substantially U shape when viewed in cross section. A flange portion 62b is formed on both sides of the body portion 62 so as to protrude radially outward. Further, the main body portion 62 has a bottom surface 62 a that forms a flow path that connects the inflow port 54 to the first outflow port 55 .

As shown in FIG. 7, the handle 63 is provided so as to extend across the body portion 62 from the brim portion 62b on the one end side to the brim portion 62b on the other end side. The fitting portion 64 is provided below the body portion 62 . The fitting portion 64 is a substantially cylindrical portion that can be fitted into the second outflow port 56 so as to block the second outflow port 56 . In this embodiment, a rubber seal member 64a is provided on the outer peripheral portion of the fitting portion 64 . The seal member 64 a serves to seal the second outlet 56 and the fitting portion 64 of the switching member 60 . The overflow prevention plate 65 is provided to prevent sewage from overflowing toward the first outlet 55 when forming the second flow path c2.

When the fitting portion 64 of the switching member 60 is fitted in the second outflow port forming portion 52a, the switchable drainage basin 50 closes the second outflow port 56 and directs the sewage flowing in from the inflow port 54 to the first flow. Let it flow out from the outlet 55 . Specifically, as shown in FIG. 8(a), 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 is such that the brim portion 62b is the mass main body. 52 is maintained in a posture supported by a step portion 57 (illustration is omitted in FIG. 8). Thereby, the switching member 60 is arranged so as to connect the bottom surface 62a, the inlet port 54 and the first outlet port 55, and forms a substantially U-shaped drainage channel in a cross-sectional view.

In the switchable drainage trough 50, by displacing the position of the switching member 60 with respect to the trough body 52 from a state in which the fitting portion 64 of the switching member 60 is fitted in the second outflow port 56, the sewage discharge port is switched to the first flow. It is possible to switch from outlet 55 to second outlet 56 .

Specifically, when the handle 63 of the switching member 60 is grasped and lifted upward from the state shown in FIG. At 60, the body portion 62 is supported above the stepped portion 57 (not shown in FIG. 8) of the mass body 52 (see FIG. 8B). As shown in FIG. 8B, when the body portion 62 is supported by the step portion 57 of the mass body 52, the bottom surface 62a is displaced upward to open the closed second outlet 56. As shown in FIG.

When the second outlet 56 is open, the sewage that has flowed into the mass body 52 from the inlet 54 falls toward the second outlet 56 before reaching the first outlet 55, and flows through the second outlet 56. It flows out from 56. As a result, the switchable drainage basin 50 can be switched from a state in which sewage is discharged from the first outlet 55 to a state in which sewage is discharged from the second outlet 56 . In addition, the switchable drainage basin 50 is operated in a manner opposite to that described above, that is, from a state in which the fitting portion 64 is removed from the second outflow port forming portion 52a, the fitting portion 64 is fitted into the second outflow port forming portion 52a. By setting the state in which the sewage is discharged from the second outflow port 56, the state in which the wastewater is discharged from the first outflow port 55 can be switched to the state in which the wastewater is discharged.

The backflow prevention trough 70 is a drainage trough provided on the downstream side of the drainage channel C from the switchable drainage trough 50 . The backflow prevention trough 70 may be any type of drainage trough, such as a sewage trough or a rainwater trough, as long as it is a trough located downstream of the switchable trough 50 . Further, the backflow prevention mass 70 of the present embodiment is processed and molded from a resin material such as vinyl chloride or reinforced fiber plastic. The backflow prevention mass 70 may be formed by forming the mass body and the inspection cylinder from concrete or the like.

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

The check valve 72 is for preventing sewage from flowing back from the downstream side to the upstream side. In this embodiment, the backflow suppression valve 72 is provided in the backflow suppression mass 70 . The configuration of the backflow prevention mass 70 is not particularly limited as long as it can suppress the backflow of sewage from the downstream side to the upstream side.

The check valve 72 is for permitting the flow of sewage from the upstream side to the downstream side and restricting the flow of sewage from the downstream side to the upstream side. The backflow suppression valve 72 is swingable and detachably attached to the mass body of the backflow suppression mass 70 . The check valve 72 closes the inlet when the sewage does not flow. When sewage flows from the upstream side, the check valve 72 is pushed up by the sewage. As a result, the backflow prevention mass 70 secures a flow path for sewage flowing from the upstream side. Therefore, the sewage flowing from the upstream side flows into the downstream side without being blocked by the check valve 72 . On the other hand, when sewage flows back into the backflow prevention mass 70, the flow of the sewage is restricted by the backflow suppression valve 72 covering the inflow port, and the flow of the sewage to the upstream side is restricted.

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 backflow suppression valve 72 may be attached to the backflow suppression mass 70 via a connecting member.

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

The water supply pump 82 (pump) is for conveying 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 or a non-displacement type, as long as it can convey 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, such as when the supply of water to the existing drainage facility 3a is stopped in the event of a disaster.

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 located outside the building 1 and is buried in the ground. As shown in FIG. 1, the sewage reservoir 84 is connected to the switchable sump 50 via the second line 44 . The sewage that flows from the second outflow port 56 is stored in the sewage storage tank 84 . The sewage storage tank 84 has a sealed space inside. Since the sewage storage tank 84 is of a sealed type, bad odors generated from the sewage in the sewage storage tank 84 are prevented from leaking to the outside. The sewage storage tank 84 does not necessarily have to be buried in the ground. The sewage storage tank 84 may be installed on the ground.

<Discharge of sewage during normal operation and during operation>
Next, the operation of the drainage system S during normal operation and during operation will be described with reference to FIGS. 9 and 10 and the like.

The drainage system S discharges wastewater flowing out from the drainage facilities 3 such as the existing drainage facility 3a to the sewage main pipe 4 during normal operation (during the water supply and drainage function). In addition, the drainage system S supplies water to the pipeline 40 when the supply of water to the drainage facility 3 is stopped due to a water outage or when it becomes necessary to install the temporary drainage facility 3b (during water supply failure). to drain the sewage in the pipeline 40. Furthermore, when a disaster such as an earthquake or tsunami occurs and the sewage main pipe 4 or the like is damaged (drainage is not possible), the drainage system S switches the drainage channel C of the switchable drainage basin 50 to It is used to discharge sewage flowing out of the drainage system 3 to the sewage storage tank 84 .

<Regarding normal times>
As shown in FIG. 9, the drainage system S normally drains sewage discharged from the drainage facility 3 to the sewage main pipe 4 through the first flow path c1. More specifically, in normal times, the drainage system S discharges sewage from the existing drainage facility 3a through the first flow path c1 leading to the sewage main pipe 4 via the switchable drainage basin 50 .

Also, in normal times, the water storage tank 80 is closed by a lid member 80a. Further, the operation part 20 of the water storage device 10 is separated. More specifically, the operation part 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 tubular body 24 removed from the first tubular body 22 (Fig. 5(a) )reference). Therefore, in the drainage system S, the operation part 20 is accommodated inside the water storage device 10 when there is no need to operate the operation part 20 of the water storage device 10, such as when people come and go on the ground. Part 20 can be moved out of the way. Moreover, if the second tubular body 24 is housed inside the water storage device 10, loss of the second tubular body 24 can be suppressed.

<About operation time>
The drainage system S can allow stored water to flow from the water storage tank 80 into the pipeline 40 and discharge sewage in the pipeline 40 to the downstream side when water supply is not possible.

As shown in FIG. 10, a water supply pump 82 is provided for conveying stored water from the water storage tank 80 to the water storage device 10 when water supply is disabled. In addition, a temporary drainage system 3b is provided as necessary in the event of a disaster or the like. Furthermore, as shown in FIG. 11( a ), when the drainage system S is unable to supply water and it is necessary to supply water from a water supply source such as the water storage tank 80 (during operation), a predetermined place or water storage The second tubular body 24 housed inside the device 10 is prepared, and the operation part 20 is brought into a state (connected state) in which the first tubular body 22 and the second tubular body 24 are connected.

When dirty water is discharged from the existing drainage system 3a or the temporary drainage system 3b, and the sewage accumulates in the pipeline 40 and needs to be discharged, the stored water is discharged from the water storage tank 80 to the pipeline 40 through the water storage device 10. Inflow and push sewage to the downstream side.

More specifically, at the time of operation, first, stored water is caused to flow into the water storage device 10 with the outflow port 14 of the water storage device 10 closed (see FIG. 11(a)). 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 the opening 31 is closed by the lid 32 . Further, 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 to flush the sewage in the pipeline 40 at once.

As shown in FIG. 11(b), after reaching a certain amount of water stored in the water storage device 10, the operation part 20 is lifted upward to displace the blocking part 18 blocking the outflow port 14 upward. . As a result, the outflow port 14 is opened, the water stored in the water storage device 10 flows into the pipeline 40 at once, and the sewage in the pipeline 40 is conveyed downstream. In this way, the drainage system S can feed the stored water into the pipeline 40 and wash away the sewage in the pipeline 40 from the upstream side to the downstream side in the event of a water outage or the like.

Further, as described above, the water storage device 10 can be operated to pull up the operation portion 20 while the upper end portion of the operation portion 20 is arranged outside the water storage device 10 . Furthermore, as described above, the water storage device 10 is provided with the stopper portion 29 . Therefore, in the water storage device 10, the operation portion 20 is excessively displaced upward, causing the closing portion 18 to fall off the mass body 12, or the second tubular body 24 to come off the lid 32 to the outside of the water storage device 10. can be suppressed.

Furthermore, the opening and closing operation of the outflow port 14 of the water storage device 10 can be performed by the extremely simple operation described above. Therefore, even a person without 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 damage to the sewage main pipe 4, etc., such as during a disaster, the drainage system S directs the sewage to the sewage main pipe. It is desirable to switch the drainage channel C from 4 to the sewage storage tank 84 .

The switching operation of the drainage channel C can be performed, for example, as follows. First, the operator removes the lid 59 covering the inspection cylinder 58 from the inspection cylinder 58 . Next, the handle 63 of the switching member 60 is grasped, the switching member 60 is pulled up, and the switching member 60 is rotated by about 90 degrees in the circumferential direction. As a result, the switching member 60 is held above the mass body 52, and the second outflow port 56 is kept open (see FIG. 8(b)). If the handle 63 is out of reach of the operator, the switch member 60 can be lifted by hooking the hook on the handle 63 using, for example, a bar having a hook at its tip.

When the drainage channel C is switched to the second channel c2, the sewage that has flowed out of the drainage facility 3 flows from the inlet 54 of the switchable drainage basin 50 into the basin body 52. As shown in FIG. At this time, the second outflow port 56 is open from the switching member 60, and the second outflow port 56 is formed in the lower portion of the mass body 52, so that the sewage that has flowed into the mass body 52 flows into the second stream. It drops into the outlet 56 and flows out of the mass body 52 . The sewage that flows out from the second outflow port 56 is discharged to the 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 it is difficult to drain the sewage main pipe 4 (drainage is not possible).

In this way, the drainage system S allows the stored water to flow into the pipe line 40 and discharge the sewage downstream when the water supply is not possible, and switches the drainage flow path C to drain the sewage to the sewage storage tank 84 when the drainage is not possible. can be discharged. In other words, the drainage system S can replace the function of water supply and drainage when the sewage system becomes unable to supply and drain water.

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

In the operation part 20 of the water storage device 10 according to the above-described embodiment, an example is shown in which the first tubular body 22 and the second tubular body 24 are connected via the pipe joint 26, but the water storage device of the present invention , but not limited to. For example, in the water storage device of the present invention, the first tubular body and the second tubular body may be directly connected by a threaded structure.

Also, in the drainage system S according to the above-described embodiment, an example in which the water storage device 10 is provided upstream of the existing drainage facility 3a is shown, but the drainage system of the present invention is not limited to the above-described embodiment. For example, in the drainage system of the present invention, when the water supply is functioning, sewage discharged from the existing drainage facility 3a is discharged with water supplied from a normal water pipe, and sewage discharged from the temporary drainage facility 3b is discharged. It may be used to supply and drain 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. Moreover, the drainage system of the present invention may be provided with a plurality of water storage devices.

Further, although the water storage device 10 and the switchable drainage basin 50 of the drainage system S according to the embodiment described above are formed by processing and molding a resin material, the present invention is not limited to this. 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 basin may be made of concrete.

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

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

3 Drainage facility 3b Temporary drainage facility 10 Water storage device 14 Outlet 18 Blocking part 20 Operation part 22 First tubular body 24 Second tubular body 26 Pipe joint 28 Expanded diameter part 29 Stopper part 32 Lid body 34 Insertion part 36 Water supply port 38 Discharge Outlet 40 Pipe 42 First pipe (pipe)
44 second pipeline (pipeline)
48 Standpipe 50 Switchable drainage basin 80 Water tank (water supply source, water tank)
84 sewage storage tank S drainage system X axial direction C drainage channel c1 first channel (drainage channel)
c2 second channel (drainage channel)

Claims (6)

A water storage device arranged on a pipeline forming a drainage channel for draining sewage,
a water storage device main body formed in a tubular shape and provided with an outlet for discharging water introduced therein;
a blocking part capable of blocking the outflow port;
an opening formed so as to communicate with the interior at one axial end side of the water storage device main body;
has
By closing the outlet with the blocking part, water can be stored inside the main body of the water storage device,
By moving the blocking part to a position away from the outflow port, the outflow port can be opened and the water stored in the water storage device main body can be discharged,
Having an operation part connected to the closing part,
By inserting the operation portion, the operation portion is held so as to be slidable in the axial direction of the water storage device main body, and
A water storage device, wherein the operating portion can be operated through the opening in a state in which the outflow port is closed by the closing portion. 2. The water storage device according to claim 1, further comprising a stopper portion for restricting the displacement range of said operating portion. The operation unit is
a first tubular body attached to the closing portion;
a second tubular body connected to the first tubular body;
A pipe joint that connects the first tubular body and the second tubular body,
3. The water storage device according to claim 2, wherein the stopper portion is formed by the pipe joint. a water storage device according to any one of claims 1 to 3;
a pipeline forming a drainage channel for draining sewage;
a water supply source;
A drainage system, wherein the water storage device is provided on the pipeline downstream of the water supply source. one or more stand pipes provided on the pipeline;
a temporary drainage system temporarily attached to at least one of said standpipes;
5. The drainage system according to claim 4, wherein the vertical 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;
a switchable drainage mass that enables switching of the drainage channel;
6. A method according to claim 4 or 5, characterized in that, by operating the switchable drainage basin, the drainage channel can be switched to discharge sewage towards the sewage storage tank. drainage system.

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