JP6715642B2 - Offensive odor prevention drainage system and method for installing a wastewater tank for the offensive odor prevention drainage system - Google Patents

Description

The present invention relates to a malodor preventive drainage system and a method for installing a dirty water tank for the malodor preventive drainage system.

As shown in FIG. 12, the basement part B of the building 100 may be located below the public sewer pipe 80. Conventionally, sewage and sewage generated in the basement portion B (hereinafter referred to as sewage) are temporarily stored in a large drain tank 85 installed further below via an inflow pipe 81. After that, the sewage and the like is pumped up to the sewage tank 91 by the drainage pump 90 installed in the drainage tank 85, and is drained to the public sewer pipe 80 through the sewage tank 93. In addition, sewage and the like generated on the first floor and above of the building 100 is normally directly discharged to the sewage basin 91 by natural flow.

In such equipment, the pump 90 is started when the water level in the drainage tank 85 reaches a predetermined water level. However, if the water level in the drainage tank 85 does not reach the predetermined water level and sewage remains at the bottom of the drainage tank 85 for a long period of time, rot will progress and odor will be generated from the manhole etc. when discharged to the public sewer pipe 80. There is a case.

The above-mentioned problem is remarkable because the drain tank 85 is too large, so that the area of the bottom of the water tank is large and the amount of residual sewage and the like is large. In order to improve this, in the drain tank 85 shown in FIG. 12, a bottom plate 87 of the drain tank 85 is provided with a slope descending toward the drain pump 90, or a recess 89 is provided in the bottom plate 87 where the pump 90 is installed. Are equal. In addition, the operation method of the pump 90 is improved, for example, after the pump 90 is operated to the pump-off water level WL2, the operation of the drainage pump 90 is continued for a predetermined time to reduce the amount of residual sewage and the like as much as possible. I have to.

However, even with the improvement as described above, the amount of residual sewage and sewage still remains large, and it has not been possible to suppress the progress of spoilage of sewage and sewage. Therefore, conventionally, there has been proposed a malodor preventing type drainage facility in which a tubular water tank (barrel) is arranged in a drainage tank (pit) and a pump is adopted in the barrel.

Patent No. 4455742

In the above malodor preventing drainage facility, the diameter of the barrel is designed according to the diameter of the manhole so that the barrel can be carried into the pit through the manhole formed in the pit. Also, because the barrel diameter is limited, only one pump is placed in each barrel. Therefore, in order to provide a plurality of pumps, a plurality of barrels are arranged corresponding to the number of pumps, but a manhole for inspecting the pumps is required for each barrel, which makes the construction complicated. There are cases. In addition, in general, in the drainage system, only the start and stop control is performed and the pump is operated at a constant rotation speed.Therefore, when a large-capacity pump that matches the maximum water volume is installed, the amount of drainage at night is small. Even at this time, since the operation is performed at the rotation speed at the maximum drainage amount, the energy efficiency is reduced. Furthermore, since the diameter of the barrel cannot be increased, it is difficult for a plurality of people to enter the barrel, and the work such as cleaning the inside of the barrel is complicated.

Further, conventionally, when a plurality of barrels were provided, each barrel was connected through a communication pipe, but sewage and the like may contain solid foreign substances and large foreign substances, and the communication pipe may be clogged. May occur. When the communication pipe is clogged, sewage or the like on the primary side of the communication pipe remains and causes a bad odor, or sewage overflows from the barrel. In addition, when sewage or the like is caused to flow through the communication pipe by utilizing natural flow, it is not possible to take measures such as backwashing with a pump when the communication pipe is clogged.

The present invention has been made in view of the above points, and it is an object of the present invention to eliminate a communication pipe between barrels and prevent clogging of dirty water and the like. Further, one of the purposes is to reduce the amount of sewage remaining at the end of the drainage operation of the pump and suppress spoilage. Further, it is an object of the present invention to provide a malodor preventing drainage facility that is easy to install and can prevent the generation of malodor.

The odor prevention type drainage equipment of the present invention is a drainage tank installed in a pit which is a drainage tank installed at a position lower than a sewer pipe, and a pump provided in the wastewater tank for draining stored water to the outside. And The wastewater tank is formed of a plurality of panel members, and each of the plurality of panel members has at least the length of the short side of the plate surface equal to or less than the diameter of the opening formed in the pit. That is, each of the plurality of panel members has a contour shape that can be carried into the pit through the opening formed in the pit. Moreover, in other words, each of the plurality of panel members has a maximum width when viewed from a specific direction that is equal to or smaller than the diameter of the opening formed in the pit.
According to such a malodor preventing drainage facility, the panel member can be carried into the pit through the opening formed in the pit. Further, since the sewage tank is formed of a plurality of panel members, the size of the sewage tank can be determined according to the amount of water flowing into the sewage tank, and a plurality of pumps can be provided in the sewage tank. Therefore, even when a plurality of pumps are provided, it is not necessary to provide a plurality of dirty water tanks in accordance with the number of pumps, and it is not necessary to provide a communication pipe, so that it is possible to avoid clogging of the communication pipe with dirty water or the like.

Further, a plurality of pumps may be provided in the waste water tank. These multiple pumps may be connected in parallel to the outside. Then, a replacement operation in which some of the plurality of pumps are operated with replacement and/or a parallel operation in which all of the plurality of pumps are simultaneously operated may be performed.
In this way, even if some of the plurality of pumps have an abnormality, the other pumps can be used for draining. Also, when the amount of inflow to the sewage tank is small, energy efficiency can be improved by performing a replacement operation, and when the amount of inflow to the sewage tank is large, parallel operation can be performed to sufficiently drain water from the sewage tank. ..

Further, at least a part of the panel member that defines the bottom surface of the dirty water tank may be formed with a cauldron or a pre-turning tank concave portion which is a cylindrical concave portion into which the suction port of the pump is inserted.
By doing so, the sewage in the sewage tank can be guided to the cauldron or the pre-turning tank recess, and the amount of the sewage remaining at the end of the pump drainage operation can be reduced to suppress spoilage.

Further, when the cauldron or the pre-turning tank recess is formed, the malodor preventing type drainage facility may include a pedestal that is higher than the depth of the cylindrical recess and supports the waste water tank.
By doing so, it is possible to easily install the waste water tank in which the cauldron or the pre-turning tank recess is formed in the pit.

Further, the waste water tank may have an internal space defined by a bottom surface, a side surface, and an upper surface by a plurality of panels.
By doing so, it is possible to prevent a bad odor from being generated in the pit and the opening.

Further, it is preferable that the dirty water tank can store water commensurate with the inflow amount of water and has a reserve capacity.

Further, it is preferable that the dirty water tank has an opening through which the pump can pass and a lid for sealing the opening.
In this way, the pump can be taken in and out through the opening by opening the lid. This makes it possible to easily maintain the malodor preventing drainage facility.

The method of installing a sewage tank for an offensive odor prevention type drainage equipment of the present invention is a method of installing a sewage tank in a pit which is a drainage tank installed at a position lower than a sewer pipe. This method, at least the step of preparing a plurality of panel members whose length of the short side on the plate surface is less than or equal to the diameter of the opening formed in the pit, and a step of loading the plurality of panel members into the pit through the opening, including. Then, a step of forming a waste water tank by assembling a plurality of panel members in the pit is included.
According to the method of installing a wastewater tank for such a malodor prevention type drainage facility, the size of the wastewater tank can be determined according to the inflow amount of water into the wastewater tank, and a plurality of pumps should be provided in the wastewater tank. You can also Therefore, even when a plurality of pumps are provided, it is not necessary to provide a plurality of dirty water tanks and it is not necessary to provide a communication pipe, so that it is possible to avoid clogging of the communication pipe with dirty water or the like.

Another method of installing a waste water tank for the malodor preventing type drainage equipment of the present invention is a method of installing a waste water tank in a pit which is a drain tank installed at a position lower than the sewer pipe. In this method, two or more pumps can be installed inside and a step of preparing a sewage tank that can seal the inside except for a vent hole and a pipe flow path, and a sewage tank inside the pit through an opening formed in the pit. The steps of carrying in and installing the wastewater tank so that the wastewater tank is supported by the bottom surface of the pit are included.
According to the method of installing a wastewater tank for such a malodor prevention type drainage facility, it is possible to install two or more pumps inside the wastewater tank, and since it is not necessary to provide a communication pipe, sewage etc. It is possible to avoid clogging. Further, since the dirty water tank can be sealed, it is possible to prevent a bad smell from being generated in the pit and the upper floor. Furthermore, since the sewage tank is supported by the bottom surface of the existing pit, the sewage tank can be easily installed. However, the dirty water tank may be directly supported on the bottom surface of the pit, or may be indirectly supported on the bottom surface of the pit through a reinforcing member or a pedestal.

It is the whole odor prevention type drainage equipment whole lineblock diagram concerning a 1st embodiment. It is the whole odor prevention type drainage equipment whole lineblock diagram concerning a 1st embodiment. It is a perspective view which shows a sewage tank concerning this embodiment, omitting a part of panel member. It is a figure which shows typically the carrying in of the panel member in a pit. It is a longitudinal cross-sectional view which shows the whole structure of the bad smell prevention type drainage equipment which concerns on 2nd Embodiment. It is a figure which shows the bottom face of the dirty water tank of 2nd Embodiment. It is a perspective view showing a pump mount. It is a longitudinal section showing a pump mount. It is a side view which shows the structure of the dirty water tank which concerns on 3rd Embodiment by a partial cross section. It is a top view showing the composition of the dirty water tank concerning a 3rd embodiment. It is the whole odor prevention type drainage equipment whole lineblock diagram concerning a 3rd embodiment. It is a schematic sectional side view which shows an example of the conventional drainage equipment.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are overall configuration diagrams of a malodor preventing drainage facility according to the first embodiment. Here, FIG. 1 is a schematic plan view of the malodor preventing drainage system (a view of the pit P side from the basement portion B shown in FIG. 2), and FIG. 2 is a schematic side sectional view of the malodor preventing drainage system. .. This odor prevention type drainage system can be suitably used particularly for discharging the drainage from the basement part B located at a position lower than the public sewer pipe in a building (for example, a building) to the public sewer pipe 80.

As shown in FIGS. 1 and 2, the malodor preventing drainage facility 10 is provided in a pit P which is a drainage tank installed below the basement portion B of the building (for example, a building) 100. An opening (manhole) 15 is formed in the pit P, and a lid 16 is attached to the opening 15. As shown in FIG. 2, the malodor preventing drainage facility 10 includes a wastewater tank 12 provided in the pit P and a pump 20 installed in the wastewater tank 12. The pump 20 is a well-known pump for drainage, and is provided for draining wastewater and the like stored in the wastewater tank 12 to the outside.

The wastewater tank 12 has a substantially rectangular parallelepiped shape (box shape) as a whole, and has an internal space defined by a bottom surface 12a, a side surface 12b, and an upper surface 12c. An opening 13 is formed in the upper surface 12c of the waste water tank 12, and the opening 13 is covered with a lid 14. The opening 13 is formed above the pump 20 and has a size that allows the pump 20 to pass through. In this embodiment, two pumps 20 are installed in the waste water tank 12, and the opening 13 and the lid 14 are provided corresponding to each pump 20. Thereby, for example, the pump 20 can be moved in the vertical direction by using a hanging tool, and the pump 20 can be installed in the sewage tank 12 or taken out from the sewage tank 12, without draining the sewage of the sewage tank 12. The pump 20 can be replaced and maintained. Here, the pump 20 is preferably installed in the wastewater tank 12 by a known attachment/detachment device. The attachment/detachment device does not form the core of the present invention, and a detailed description thereof will be omitted.

An inflow pipe 23 is inserted into the dirty water tank 12 through the lid 14. The inflow pipe 23 is piped from the basement portion B through the lid 16 of the pit P, and the sewage and the like generated in the basement portion B flows into the sewage tank 12. In addition, the outflow pipe 21 is inserted into the sewage tank 12 through the lid 14. The outflow pipe 21 is connected to the discharge port of the pump 20 in the dirty water tank 12, penetrates the lid 16 of the pit P, and is connected to the dirty water tank 91 via the check valve 17 and the gate valve 18. In the present embodiment, the outflow pipe 21 is connected to each of the discharge ports of the two pumps 20 in the wastewater tank 12, and is connected to the wastewater tank 91 side outside the wastewater tank 12 and integrated in the pit P. ing. That is, the two pumps 20 are connected in parallel to the outside. The outflow pipe 21 is not limited to be integrated in the pit P, and may be integrated in the dirty water tank 12 or may be integrated after passing through the check valve 17 and the sluice valve 18, respectively. Good. Further, the inflow pipe 23 and the outflow pipe 21 are not limited to those that penetrate the lid 14 of the dirty water tank 12 and the lid 16 of the pit P, and may penetrate the side surface 12b or the upper surface 12c of the dirty water tank 12, It may be provided by penetrating the side surface or the upper surface of the pit P.

On the bottom surface 12a of the dirty water tank 12, a kettle 24, which is a cylindrical recess into which the suction port of the pump 20 is inserted, is formed. Here, a nozzle may be attached to the pump 20 so that the suction port reaches a deep position of the shuttle 24. As described above, the kettle 24 is formed on the bottom surface of the waste water tank 12, so that the waste water and the like in the waste water tank 12 is guided to the kettle 24 and the waste water and the like remain when the drainage operation of the pump 20 ends. By reducing the amount, it is possible to suppress spoilage in the wastewater tank 12. In addition, the kettle 24 may be provided for each of the plurality of pumps 20, the kettle 24 common to the plurality of pumps 20 may be provided, or only the particular pump 20 may be provided. 24 may be provided. Further, in the present embodiment, the bottom surface 12 a of the wastewater tank 12 is the pump 20.
It is assumed that the slope is provided such that the farther from the height, the larger the height, and the closer to the pump 20, the smaller the height. As a result, the sewage in the sewage tank 12 can be guided to the shuttle 24 (pump 20) more effectively, and the generation of a foul odor can be prevented.

Further, as shown in FIG. 2, a water level sensor 25 is installed on the bottom surface 12 a of the dirty water tank 12. The water level sensor 25 is a pressure type, and can be installed on the bottom surface 12a to measure the current water level.

FIG. 3 is a perspective view showing the waste water tank according to the present embodiment with a part of the panel member omitted, and FIG. 4 is a diagram schematically showing the loading of the panel member into the pit. As shown in FIG. 3, the dirty water tank 12 is formed by connecting a plurality of panel members 120. Each of the plurality of panel members 120 defines a bottom surface, a side surface, and a top surface of the wastewater tank 12. In addition, in FIG. 1 and FIG. 2, a plurality of panel members 120 in the waste water tank 12 are separated by a chain line. As shown in FIGS. 1 to 3, in the present embodiment, the bottom surface and the top surface are formed by 3×5 panel members 120 and the side surfaces are formed by 2 heights, and a total of 62 sheets are formed. The panel member 120 forms the dirty water tank 12. However, the waste water tank 12 is not limited to such an example, and may be formed of an arbitrary number of panel members 120.

The plurality of panel members 120 are formed of, for example, resin or metal. In addition, the panel member 120 may be formed of a plurality of layers of material, for example, may be formed by laminating a fiber reinforced plastic (FRP) having excellent heat insulating properties, a synthetic resin foam, and a synthetic resin exterior. Good. Each of the plurality of panel members 120 has a side length Lp smaller than the diameter Dm of the opening 15 so that the panel member 120 can pass through the opening (manhole) 15 formed in the pit P. For example, in the present embodiment, the opening 15 of the pit P has a cylindrical shape with a diameter Dm of 600 mm, and each of the plurality of panel members 120 has a side of the plate surface that is smaller than the diameter Dm and is approximately 500 mm square. However, the plurality of panel members 120 do not have to have the same plate surface shape, and for example, the panel member 120 that defines the bottom surface and the panel member 120 that defines the side surfaces may have different sizes. Good. Further, the panel member 120 is not limited to one in which the length of each side of the plate surface is smaller than the diameter Dm of the opening 15, and the long side of the plate surface may be larger than the diameter Dm and the short side thereof may be smaller than the diameter Dm. .. By thus determining the size of the panel member 120, the panel member 120 can be carried into the pit P from the basement portion B through the opening 15 as shown in FIG. Therefore, the panel member 120 can be carried into the pit P without forming a new opening in the basement portion B and the pit P.

Among the plurality of panel members 120, the panel member 120 that constitutes the upper surface 12c above the pump 20 is provided with the opening 13 and the lid 14. Further, a shuttle 24 is formed on the panel member 120 that constitutes the bottom surface 12a on which the pump 20 is installed. Here, as described above, the shuttle 24 is a concave portion and protrudes downward as compared with the other panel member 120 forming the bottom surface 12a. Therefore, in this embodiment, the pedestal 19 that supports the dirty water tank 12 is provided. The mount 19 has a height Ht larger than the depth Dh of the shuttle 24 (see FIG. 3). The pedestal 19 is formed of, for example, metal, resin, concrete, or the like, and is connected to the wastewater tank 12 by an anchor bolt or the like (not shown). By providing the pedestal 19 in this manner, the sewage tank 12 can be placed in the pit P without filling all the gaps formed below the sewage tank 12 with concrete or making a hole in the bottom surface of the pit P corresponding to the shuttle 24. Can be installed.

Next, a method of installing the dirty water tank 12 in the pit P will be described. When installing the dirty water tank 12 in the pit P, first, a plurality of panel members 120 for assembling the dirty water tank 12 are prepared. That is, a plurality of panel members 120 each having a length Lp of one side (at least a short side on the plate surface) smaller than the diameter Dm of the opening 15 formed in the pit P are prepared. continue,
The prepared plurality of panel members 120 are carried into the pit P from the basement portion B through the opening 15 (see FIG. 4). Then, the sewage tank 12 is formed by assembling the plurality of panel members 120 in the pit P. At this time, the dirty water tank 12 may be formed on the pedestal 19. Further, the pump 20 may be installed in the waste water tank 12 through the opening 13 after the waste water tank 12 is assembled, or the waste water tank 12 may be assembled with the pump 20 positioned inside. Further, the plurality of panel members 120 may be connected by using screws or the like, or may be connected by adhesion or welding. Further, in order to reinforce the dirty water tank 12, a reinforcing member may be provided on at least one of the inside and the outside of the dirty water tank 12. It is preferable that the assembled sewage tank 12 is sealed except for a channel for sewage and the like (outflow pipe 21, inflow pipe 23) and a vent hole (not shown). By doing so, it is possible to suppress the generation of a bad odor in the pit P and the basement portion B.

The operation of the pump 20 in the malodor preventing drainage facility 10 will be described. First, the sewage and the like generated in the basement portion B accumulates in the sewage tank 12 through the inflow pipe 23. The pump 20 starts operation when the water level sensor 25 detects that the water level in the wastewater tank 12 has reached a predetermined water level, or when a predetermined time has elapsed since the previous operation was stopped, and the pump 20 is operated. The sewage inside is drained to the sewage tank 91 through the outflow pipe 21. The sewage discharged to the sewage basin 91 is drained to the public sewer pipe 80 via the sewage basin 93. When the dirty water or miscellaneous drainage in the dirty water tank 12 is exhausted, the water level sensor 25 detects it and stops the operation of the pump 20.

Further, when starting the pump 20, the operation pump is rotated. That is, one of the two pumps 20 performs a replacement operation in which the pump 20 is operated with replacement. This prevents water from staying in the pump for a long time. Further, if the water level does not drop even if one pump 20 is operated, an operation pump is added. That is, parallel operation is performed in which all the two pumps 20 are simultaneously operated. Since multiple pumps 20 can be installed in one sewage tank 12, for example, in buildings such as office buildings where little water is used at night, multiple pumps 20 with a small capacity are installed and the amount of discharged water at night. Energy is saved by controlling the number of pumps operating such that one pump operates when there is a small amount of water and all pumps operate during daytime drainage. Here, in the present embodiment, two pumps 20 are provided, but even when three or more pumps 20 are provided, a replacement operation in which one or more pumps 20 of the plurality of pumps 20 operate with replacement is performed. It is possible to perform parallel operation in which all of the plurality of pumps 20 are simultaneously operated. Thereby, energy saving of the malodor preventing drainage facility 10 can be achieved. Further, since it is possible to perform an appropriate pump operation corresponding to the amount of sewage and the like, it is possible to reduce the amount of sewage and the like remaining in the sewage tank 12, reduce the amount of spoilage and prevent the generation of foul odors. it can.

In addition, if the pump 20 is controlled so as to be operated after the water level sensor 25 detects that water has flowed into the wastewater tank 12, the pump 20 will be operated when a predetermined time has elapsed since the last operation was stopped. The retention time of the dirty water in the dirty water tank 12 can be shortened as compared with the case of controlling to start.

In the malodor preventing type drainage facility 10 of the present embodiment described above, the plurality of panel members 120 are carried into the pit P through the opening 15 of the pit P, and the plurality of panel members 120 are assembled to form the dirty water tank 12. .. Therefore, the drainage tank of the existing building can be used as it is as the pit P for storing the dirty water tank 12 of the present embodiment, and can be economically improved to the malodor preventing drainage facility 10 of the present embodiment. Further, the waste water tank 12 is sealed except for a flow path for waste water and the like and a vent hole (not shown), and an opening 13 and a lid 14 are provided above each pump 20 of the waste water tank 12. Therefore, it is not necessary to provide a manhole for each pump 20 in the basement portion B and the pit P, and the malodor preventing drainage facility 10 can be easily installed. Further, since the sewage tank 12 has an internal space defined by the upper surface, the side surface, and the bottom surface, and the insides of the sewage tank 12 and the pit P are covered with the lids 14 and 16, respectively, a foul odor leaks to the upper floor. Can be prevented.

Moreover, since the size of the dirty water tank 12 can be freely designed by using the plurality of panel members 120, the plurality of pumps 20 can be provided without providing a communication pipe or the like for connecting the barrels. It is possible to avoid clogging of the communication pipe with sewage. Further, in the present embodiment, since the plurality of pumps 20 are connected in parallel to the outside, even if some of the pumps 20 are defective, the other pumps 20 are used to drain the wastewater and the like. At the same time, energy saving can be realized by controlling the number of pumps 20 according to the inflow amount of sewage and the like.

In addition, in the malodor preventing type drainage facility 10 of the first embodiment, the kettle 24 is formed on the bottom surface 12 a of the dirty water tank 12, but the kettle 24 may not be formed. Further, the bottom surface 12a of the dirty water tank 12 is provided with an inclination so that it becomes lower as it approaches the pump 20, but such an inclination may not be provided.

(Second embodiment)
FIG. 5 is a vertical cross-sectional view showing the configuration inside the waste water tank according to the second embodiment. In this sewage tank 12A, the pump mount 30 defines the bottom surface 12Aa of the sewage tank 12A. The pump mount 30 constitutes a part of a panel member forming the dirty water tank 12A. FIG. 6 is a view showing the bottom surface of the dirty water tank of the second embodiment, FIG. 7 is a perspective view showing the pump mount, and FIG. 8 is a vertical sectional view showing the pump mount. A flat pump attachment/detachment device seating portion 31 on which a pump attachment/detachment device 35 is mounted is formed in a substantially central portion of the pump attachment base 30, and is adjacent to an end of the pump attachment/detachment device seating portion 31. Then, a cylindrical pre-turning tank recess 37 is formed. The pump mount 30 is also provided with a liquid inflow passage portion 34 for guiding dirty water and the like to the pre-turning tank recess 37.

When the number of pumps in the dirty water tank 12A is two, as shown in FIGS. 6 and 7, the two pump mounts 30 are arranged side by side without a gap, and the bottom surface 12Aa of the dirty water tank 12A is defined. A pedestal 19 is provided to support the load of the pump 20 and the pump attachment/detachment device 35. The gantry 19 has a height Ht that is larger than the depth Dd of the pre-turning tank recess 37. When installing the pump 20 in the dirty water tank 12A, the pump 20 is hung by a chain (not shown), and the pump 20 is guided along the guide pipe 38 by a slide guide 36 that moves the guide pipe 38 up and down. Then, the discharge port of the pump 20 is lowered until it coincides with the pump attachment/detachment device 35, and the pump 20 is attached to the pump attachment/detachment device 35. As a result, the suction port 20 a of the pump 20 is inserted and arranged in the pre-turning tank recess 37 of the pump mount 30. In this way, the two pumps 20 are installed on the pump mounts 30 and 30, respectively.

The pump mount 30 is made of fiber reinforced plastic. The length of one side of the pump mount 30 is smaller than the diameter Dm of the opening 15 so that the pump mount 30 can pass through the opening 15 of the pit P. The pump mount 30 forms the dirty water tank 12A by being assembled with the panel member 120. As shown in FIG. 6, a pump mounting attachment/detachment device seating portion 31 having a rectangular planar shape and a flat central portion is provided in the central portion, and the pump mounting attachment/detachment device seating portion 31 has a longitudinal direction of the pump mounting base 30. A cylindrical pre-turning tank recess 37 into which the suction port of the pump 20 is inserted is provided adjacent to the end.

Further, a liquid inflow passage portion 34 is provided adjacent to the lateral end of the pump mounting base 30 of the pump mounting/demounting device seating portion 31, and guiding the liquid flowing into the pump mounting base 30 to the pre-swivel tank recess 37. ing. The liquid flowing into the pre-swirl tank recess 37 from the liquid inflow passage portion 34 flows in the tangential direction of the inner wall surface of the pre-swirl tank recess 37. Further, the liquid inflow passage portion 34 is provided with pump mounting base fixing holes 32 at a plurality of locations (two locations in the figure). Although the pump mount 30 is made of fiber reinforced plastic in the above example, other plastics or other materials may be used as long as the required strength is satisfied.

With such a pump mount 30, scum formation in the waste water tank can be minimized. Further, the pump attachment/detachment device 35 allows the pump to be pulled up, and the pump 20 can be maintained without draining dirty water or the like in the dirty water tank 12A. This means that the pump 20 can pump the dirty water or the like under pressure while the pump 20 is being maintained.

In the malodor preventing drainage system of the second embodiment described above, the pre-turning tank recess 37 is provided instead of the shuttle 24 in the first embodiment. Even if such a dirty water tank 12A is used, the same effect as that of the malodor preventing drainage facility 10 of the first embodiment can be obtained. Here, as shown in FIG. 5, in the wastewater tank 12A of the second embodiment, there is no upper surface and the inside is not sealed. However, without being limited to such an example, the upper surface of the dirty water tank 12A may be formed and sealed except for a flow path for dirty water and the like and a vent hole (not shown). Further, in the malodor preventing drainage facility 10 of the first embodiment, the upper surface 12c of the dirty water tank 12 may not be provided.

(Third Embodiment)
FIG. 9 is a side view showing a partial cross-section of the inside of the wastewater tank according to the third embodiment, and FIG. 10 is a plan view showing the inside of the wastewater tank according to the third embodiment. In addition, FIG. 11 is a side view showing the overall configuration of the malodor preventing drainage system according to the third embodiment in a partial cross section. A plurality of (20 in the example shown in FIG. 10) pumps 20 are provided inside the dirty water tank 12B. The dirty water tank 12B is installed in the pit P located below the public sewer pipe 80 similarly to 1st and 2nd embodiment (refer FIG. 11).

To the dirty water tank 12B, an inflow pipe 23 for flowing dirty water or the like generated in the basement portion B into the dirty water tank 12B and an outflow pipe 21 for connecting the discharge port of the pump 20 to the outside are connected.

The dirty water tank 12B is formed of fiber reinforced resin (FRP). Further, the dirty water tank 12B may have a tubular shape, may be manufactured integrally, or may be configured to be vertically separable. The dirty water tank 12B has a diameter Dt smaller than the diameter Dm of the opening 15 of the pit P. The dirty water tank 12B is installed so as to be supported by the bottom surface of the pit P. However, the dirty water tank 12B may be placed on the bottom surface of the pit P and directly supported on the bottom surface of the pit P, or indirectly supported on the bottom surface of the pit P via a reinforcing member, a mount, and the like. ..

The pump 20 is connected to the outflow pipe 21, and is configured to be able to discharge sewage containing foreign matter to the outside. In addition, each pump 20 includes a float switch 42 that drives and stops each pump 20. In addition, the pump 20 is provided with a wire 44 that extends to the opening 13B of the dirty water tank 12B and can pull up the pump 20. A lid member 40 may be provided in the opening 13B. It is preferable that the dirty water tank 12B is sealed except for the piping flow paths (outflow pipe 21, inflow pipe 23) and a vent hole (not shown). By doing so, it is possible to suppress the generation of a bad odor in the pit P and the basement portion B.

A plurality of float switches 42 are provided at positions having different heights. The float switch 42 at each position is turned on and off to detect the water level of the sewage in the sewage tank 12B. Stop the operation of.

The elevating device 46 is formed to be able to guide the movement of the pump 20, specifically, the elevating movement of the pump 20 from the opening 13B to the installation position and from the installation position to the opening 13B.

In such a malodor preventing drainage system 10B, since the float switch 42 is provided in each pump, it is possible to easily add the pump 20. Further, even if any one float switch 42 fails, it is possible to detect the correct water level by the float switch 42 provided in the other pump 20, operate the pump 20, and continue the drainage.

Further, in the dirty water tank 12B of the third embodiment, since the lifting device 46 for lifting the pump 20 is provided, the pump 20 can be pulled up by the lifting device 46 for maintenance.

Also in the malodor preventing drainage system 10B of the third embodiment described above, the sewage tank 12B can be installed in the pit P through the opening 15 formed in the pit P, and the existing pit P can be installed. It can be easily used to form the malodor preventing drainage facility 10B. Thereby, the malodor preventing drainage facility 10B can be realized economically and the generation of malodor can be prevented. The opening 15 of the pit P may be newly formed in the pit P to carry in the dirty water tank 12B, or the existing opening may be enlarged. Further, after the dirty water tank 12B is loaded into the pit P, the opening for loading the dirty water tank 12B may be closed.

In addition, also in the malodor preventive drainage equipment 10B of the third embodiment, as in the malodor preventive drainage equipment 10B of the first embodiment and the large second embodiment, the cauldron 24 or the pre-turning tank recess is formed on the bottom surface of the dirty water tank 12B. 37 etc. may be provided. A water level sensor 25 may be provided instead of or in addition to the float switch 42. On the contrary, in the malodor preventing drainage system of the first or second embodiment, a float switch 42 may be provided instead of or in addition to the water level sensor 25.

Although the embodiments of the present invention have been described above, the embodiments of the present invention described above are for the purpose of facilitating the understanding of the present invention and do not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof. Further, in the range in which at least a part of the problems described above can be solved, or in the range in which at least a part of the effect is achieved, any combination of the embodiment and the modified examples is possible, and is described in the claims and the specification. It is possible to arbitrarily combine or omit the respective constituent elements.

P... Pit Dm... Diameter B... Basement part 10 and 10B... Odor preventive drainage system 12, 12A, 12B... Sewage tank 12a... Bottom 12b... Side 12c... Top 13... Opening 14... Lid 15... Opening 16... Lid 17 Backflow prevention valve 18 Gate valve 19 Mounting frame 20 Pump 21 Outflow pipe 23 Inflow pipe 24 Kettle 25 Water level sensor 30 Pump mount 31 Pump attachment/detachment device seat 32 Fix pump mount Hole 34... Liquid inflow path 35... Pump mounting/removal device 36... Slide guide 37... Pre-turning tank recess 38... Guide pipe 40... Lid member 42... Float switch 44... Wire 46... Lifting device 80... Public sewer pipe 81 Inflow pipe 85... Drainage tank 87... Bottom 89... Recess 90... Pump 100... Building 120... Panel member

Claims (9)

A wastewater tank that is housed in a pit that is a drainage tank installed at a position lower than the sewer pipe, and temporarily stores the drained water,
A pump provided in the waste water tank for draining stored water to the outside,
Equipped with
The dirty water tank is formed by a plurality of panel members,
Each of the plurality of panel members, at least the length of the short side in the plate surface is less than or equal to the diameter of the opening formed in the pit,
Offensive odor prevention drainage system. In the waste water tank, a plurality of pumps are provided,
The plurality of pumps are connected in parallel to the outside,
Performing a replacement operation in which some of the plurality of pumps are operated with replacement, and/or a parallel operation in which all of the plurality of pumps are simultaneously operated,
The odor-preventing drainage system according to claim 1. At least a part of the panel member that defines the bottom surface of the dirty water tank is formed with a cauldron or a pre-turning tank concave portion that is a cylindrical concave portion into which the suction port of the pump is inserted.
The malodor preventing drainage system according to claim 1. A height that is greater than or equal to the depth of the cylindrical recess, and includes a pedestal that supports the wastewater tank,
The odor-preventing drainage system according to claim 3. The dirty water tank has an internal space defined by a bottom surface, a side surface, and an upper surface by the plurality of panel members .
The malodor preventing drainage facility according to any one of claims 1 to 4. The sewage tank can store water commensurate with the inflow amount of water, and has a reserve capacity,
The malodor preventing drainage system according to any one of claims 1 to 5. The dirty water tank has an opening through which the pump can pass, and a lid for sealing the opening.
The malodor preventing drainage facility according to any one of claims 1 to 6. A method of installing a sewage tank for a odor prevention type drainage facility in a pit that is a drainage tank installed at a position lower than a sewer pipe,
At least a step of preparing a plurality of panel members in which the length of the short side of the plate surface is less than or equal to the diameter of the opening formed in the pit,
Loading the plurality of panel members into the pit through the opening;
Forming a wastewater tank by assembling the plurality of panel members in the pit;
Including the method. A method of installing a sewage tank for a odor prevention type drainage facility in a pit that is a drainage tank installed at a position lower than a sewer pipe,
A step of preparing a sewage tank in which two or more pumps can be installed inside and the inside can be sealed except for a vent hole and a pipe flow path;
Loading the wastewater tank into the pit through an opening formed in the pit;
Installing the wastewater tank so that the wastewater tank is supported by the bottom surface of the pit;
Including the method.

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