JP2018080543A - Bad odor preventing type drainage apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means for detecting a water level in a pit with high accuracy.SOLUTION: A bad odor preventing type drainage apparatus comprises: a water tank including an inflow port and an outflow port; a movable partition member capable of dividing the inside of the water tank to separate a first space from a second space that communicates with the inflow port and the outflow port; a water level sensor disposed in the first space and capable of detecting a water level in the water tank; and a pump connected to the outflow port and configured to be operated in response to a detection value obtained by the water level sensor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a malodor-preventing drainage facility.

  In general, in a facility where sewage, wastewater, river water, or the like is temporarily stored in a water tank and drained by a pump, the liquid may contain dust or filth. Especially in buildings with underground structures, not only sewage generated in the basement, but also sewage generated in the building is temporarily stored in large drainage tanks or sewage tanks (also called pits or building pits) installed underground. May be stored. Since these temporarily stored liquids are located below the public sewer pipe, they are pumped up to the sewage sewage by a pump installed in the pit and drained to the public sewage pipe through the sewage sewage pipe.

  In addition, as a preventive measure against bad odor generated from sewage and miscellaneous wastewater generated in the basement of the building, a small aquarium is installed in the conventional drainage tank, and the sewage flowing into this aquarium is treated as sewage / miscellaneous. Discharge to the sewer main immediately with a submersible pump for drainage (hereinafter referred to as submersible pump). Thus, the amount of sewage staying in the water tank is reduced by using a small water tank with a small bottom area (Patent Document 1).

  A water level sensor is installed in the pit so as to detect the start water level and the stop water level of the pump. The pump can be stopped when the water level sensor detects that the water level has dropped below the stop water level, and can be started when the water level sensor detects that the water level has risen above the starting water level.

  As such a water level sensor, a float type sensor is often used (Patent Document 2). However, since the float type sensor is used in a state where it is submerged in the sewage, there is a case where an accurate water level cannot be detected due to the biting of foreign matter in the sewage. Therefore, for example, a differential pressure detector that detects the difference between the pressure of the liquid and the pressure of the gas is provided in a sealed tank that stores the liquid and the pressurized gas, and the fluctuation of the liquid level is detected by the fluctuation of the pressure difference. It has been proposed (Patent Document 3).

Japanese Patent No. 4455742 Japanese Patent Laid-Open No. 08-089710 JP 63-304118 A

  There is a need for means capable of accurately detecting the level of sewage in the pit.

According to the first aspect, a water tank having an inlet and an outlet, a movable partition member capable of separating the inside of the water tank into a first space and a second space communicating with the inlet and the outlet, There is provided a malodor-preventing drainage facility comprising a water level sensor that is disposed in a space of 1 and capable of detecting a water level in a water tank, and a pump that is connected to an outlet and is operated according to a detection value of the water level sensor. . According to this configuration, the partition member can protect the water level sensor without touching the sewage in the water tank. Accordingly, it is possible to prevent the water level sensor from malfunctioning due to the biting of foreign matter in the sewage and accurately detect the level of the sewage.

  According to the form 2, in the malodor prevention type drainage equipment of the form 1, the partition member can be operated in the vertical direction in a contact state or a close state with respect to the inner surface of the water tank.

  According to Aspect 3, in the malodor-preventing drainage system of Aspect 1, the partition member is a stretchable diaphragm member that is fixed to the inner surface of the water tank so as to form the first space.

  According to Aspect 4, in any offensive odor prevention drainage equipment according to Aspects 1-3, the water level sensor is configured to detect the pressure of the gas sealed in the first space.

  According to the form 5, in the malodor prevention type drainage equipment of the form 4, the first space is closed with respect to the outside of the water tank.

  According to the sixth aspect, a water tank having an outlet, a tubular member extending in a vertical direction from the internal space of the water tank, the tubular member having an open end communicating with the internal space of the water tank, and the open end of the tubular member A sealing member disposed on the opposite side and capable of sealing the inner space of the tubular member with respect to the outside of the tubular member, and disposed between the open end and the sealing member in the tubular member, and the water level in the water tank There is provided a malodor-preventing drainage system comprising a water level sensor capable of detecting water and a pump connected to an outlet of a water tank and operated according to a detection value of the water level sensor. According to this configuration, the tubular member can protect the water level sensor without touching the sewage in the water tank. Accordingly, it is possible to prevent the water level sensor from malfunctioning due to the biting of foreign matter in the sewage and accurately detect the level of the sewage.

  According to Aspect 7, in the malodor-preventing drainage system of Aspect 6, the water level sensor is configured to detect the pressure of the gas layer provided below the sealing member.

  According to Aspect 8, in the malodor-preventing drainage facility of Aspect 6 or 7, the tubular member is constituted by a guide pipe that guides the pump to a predetermined position in the water tank.

  According to Aspect 9, in the malodorous drainage system of Aspect 1 or 2, the water level sensor is a position sensor arranged to face the partition member so as to detect the position of the partition member.

  According to the tenth aspect, in the malodor-preventing drainage system according to any one of the first to fifth and ninth aspects, the malodor-preventing drainage system includes an inflow pipe that is inserted through the inflow port and disposed across the first space. The partition member includes a through hole through which the inflow pipe is inserted, and the inflow pipe opens in the second space.

  According to Aspect 11, in any offensive odor prevention drainage equipment according to Aspects 1 to 10, the aquarium is accommodated in a pit that is a drainage tank installed at a position lower than the sewer pipe, and the drained sewage is temporarily collected. It is a sewage tank to be stored.

  According to the twelfth aspect, the pump used in the malodor-preventing drainage facility, wherein the malodor-preventing drainage facility includes a water tank having an inlet and an outlet, an interior of the water tank, a first space, an inlet and an outlet. A movable partition member separable into a second space communicating with the outlet, a water level sensor arranged in the first space and capable of detecting the water level in the aquarium, and a pump are provided. A pump is provided which is connected to the outlet and is operated in accordance with the detected value of the water level sensor.

It is a figure showing roughly the malodor prevention type drainage equipment by a 1st embodiment of the present invention. It is a figure which shows roughly the modification of 1st Embodiment of this invention. It is a figure which shows roughly the malodor prevention type drainage equipment by 2nd Embodiment of this invention. FIG. 3 is a partially enlarged view of FIG. 2. It is a figure which shows roughly the malodor prevention type drainage equipment by 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the accompanying drawings, the same or similar elements are denoted by the same or similar reference numerals, and redundant description of the same or similar elements may be omitted in the description of each embodiment. Further, the features shown in each embodiment can be applied to other embodiments as long as they do not contradict each other. In the following description, terms indicating directions such as “up” and “down” are used for the installation state of the malodor-preventing drainage equipment shown in each drawing.

  FIG. 1 is a diagram schematically illustrating a malodor-preventing drainage system 100 according to a first embodiment of the present invention. The malodor prevention drainage system 100 includes a sewage tank 10 having an inlet 10A and an outlet 10B. The sewage tank 10 may be, for example, a small water tank disposed in a conventional drain tank (pit), for example, a small cylindrical water tank (barrel), or a plurality of panel members. It can be set as the small water tank formed by combining. The inside of the sewage tank 10 is separated into a first space 12 and a second space 13 by a partition member 11. In the example of FIG. 1, the inflow pipe 20 is inserted into an inflow port 10 </ b> A formed on the upper wall of the sewage tank 10, and the inflow pipe 20 opens in the second space 13 across the first space 12. ing. Thereby, the second space 13 communicates with the inflow port 10 </ b> A of the sewage tank 10. The partition member 11 includes a through hole 11A through which the inflow pipe 20 is inserted. A suction pipe 30 is connected to the suction port 14 </ b> A of the pump 14, and the suction pipe 30 is connected to the outlet 10 </ b> B of the sewage tank 10. The outflow port 10 </ b> B opens in the second space 13. In addition, in order to reduce the residual amount of sewage in the sewage tank 10, the outlet 10 </ b> B of the sewage tank 10 is preferably formed in the vicinity of the bottom surface of the sewage tank 10. The discharge port 14 </ b> B of the pump 14 is connected to the discharge pipe 40. In FIG. 1, 20 </ b> A and 40 </ b> A are check valves respectively disposed on the inflow pipe 20 and the discharge pipe 40. The pump 14 can be a submersible pump including a cooling mechanism that cools the motor unit.

  As shown in FIG. 1, the first space 12 is substantially defined with respect to the outside of the sewage tank 10 defined by the upper and side walls of the sewage tank 10, the outer peripheral surface of the partition member 11 and the inflow pipe 20. It is a closed space. In other words, an opening for communicating the first space 12 with the outside of the sewage tank 10 is not formed in the wall of the sewage tank 10 (such an opening can be closed, if any). The second space 13 communicates with the inlet 10A and the outlet 10B of the sewage tank 10. The partition member 11 is a movable member. Specifically, the partition member 11 is configured to be operable in the vertical direction along the inner surface of the sewage tank 10 and the outer peripheral surface of the inflow pipe 20 while being in contact with or close to them. The proximity distance is about 0 to 10 mm. The partition member 11 is in a state where its outer edge and inner edge are in contact with or close to the inner surface of the sewage tank 10 and the outer peripheral surface of the inflow pipe 20 so as to cover the entire surface of the sewage in the sewage tank 10. It is desirable. Further, when sewage flows into or out of the second space 13, the partition member 11 can move together with the surface of the sewage by buoyancy. In other words, the partition member 11 can form a boundary portion between the first space 12 and the second space 13. Although the material which forms the partition member 11 is not restricted in particular, Styrofoam is mentioned as an example.

As shown in FIG. 1, the pressure sensor 15 is disposed in the first space 12. The pressure sensor 15 is used to detect the level of sewage in the sewage tank 10. A gas is sealed in the first space 12. For example, the gas can be enclosed in the first space 12 in advance through an opening (not shown) that can be opened and closed appropriately provided on the wall surface of the sewage tank 10. In this embodiment, although gas is air, the example of gas is not restricted to air. The gas is, for example, N ₂ ,
An inert gas such as Ar may be used. In the present embodiment, the pressure sensor 15 is a pressure sensor configured to detect the pressure of the gas in the first space 12. The pump 14 is operated according to the gas pressure detected by the pressure sensor 15.

  The malodor prevention drainage system 100 includes, for example, a control device 16 that can be installed in a basement part above the drainage tank in which the sewage tank 10 is installed. The pump 14 and the pressure sensor 15 are electrically connected to the control device 16. The control device 16 can be a computer including a general signal processing device, a memory, an input / output mechanism, and the like.

  When the partition member 11 is positioned below the opening 21 of the inflow pipe 20, sewage flows into the first space 12. In order to prevent this, a stop member (not shown) for limiting the lowering of the partition member 11 can be provided in the sewage tank 10. Alternatively, the partition member 11 can always be positioned above the opening 21 of the inflow pipe 20 by disposing the opening 21 of the inflow pipe 20 below the stop water level of the pump 14.

  According to this embodiment, the partition member 11 can prevent the pressure sensor 15 disposed in the first space 12 from coming into contact with sewage. Thereby, it is possible to prevent the pressure sensor 15 from malfunctioning due to adhesion of foreign matter in the sewage, and to detect the water level of the sewage with high accuracy.

  Moreover, since the partition member 11 is movable, the position of the partition member 11 also changes according to the change in the level of sewage, and thus the volume of the first space 12 changes. For example, as the sewage water level rises, the partition member 11 rises, thereby reducing the volume of the first space 12. The volume of the first space 12 increases as the partition member 11 descends as the level of sewage falls. By prefilling the gas in the first space 12, the pressure of the gas also changes according to the change in the volume of the first space 12. Such a change in gas pressure can be associated with the level of sewage in the sewage tank 10.

  Based on the relationship between the predetermined water level and the pressure in the first space 12, the control device 16 detects the pressure (starting pressure) in the first space 12 corresponding to the starting water level of the pump 14 by the pressure sensor 15. Then, the pump 14 is started. Further, when the pressure (stop pressure) in the first space 12 corresponding to the stop water level is detected by the pressure sensor 15, the control device 16 stops the pump 14.

  In the example of FIG. 1, the upper wall of the sewage tank 10 is bent so as to partially form a recess with respect to the internal space of the sewage tank 10, and the pressure sensor 15 is accommodated in the recess. Yes. However, the pressure sensor 15 may be simply attached to a flat wall portion without forming such a bent portion or concave portion. The pressure sensor 15 may be attached to the side wall of the sewage tank 10. Even in these cases, the pressure sensor 15 is protected from the sewage by the partition member 11, so that the malfunction of the pressure sensor 15 due to adhesion of foreign matters does not occur. Therefore, the water level detection of sewage can be accurately performed.

  According to other embodiment, the malodor prevention type drainage 100A shown to FIG. 1A can be comprised. In FIG. 1A, the inflow port 10 </ b> A of the sewage tank 10 is formed on the side wall of the sewage tank 10, and the inflow pipe 20 connected to the inflow port 10 </ b> A does not cross the first space 12 in the second space 13. Is open. Therefore, the partition member 11 in FIG. 1A does not have the through hole 11A through which the inflow pipe 20 is inserted.

Also with this configuration, the partition member 11 can prevent the pressure sensor 15 disposed in the first space 12 from coming into contact with sewage. Thereby, it is possible to prevent the pressure sensor 15 from malfunctioning due to adhesion of foreign matter in the sewage, and to detect the water level of the sewage with high accuracy.

  Moreover, since the partition member 11 is movable, the position of the partition member 11 also changes according to the change in the level of sewage, and thus the volume of the first space 12 changes. For example, as the sewage water level rises, the partition member 11 rises, thereby reducing the volume of the first space 12. The volume of the first space 12 increases as the partition member 11 descends as the level of sewage falls. By prefilling the gas in the first space 12, the pressure of the gas also changes according to the change in the volume of the first space 12. Such a change in gas pressure can be associated with the level of sewage in the sewage tank 10.

  In the above embodiment, as the partition member 11, for example, a rubber-made stretchable diaphragm member may be used. For example, in the configuration of FIG. 1, the outer edge and the inner edge of the stretchable diaphragm member can be fixed to the inner surface of the sewage tank 10 and the outer peripheral surface of the inflow pipe 20. Thereby, the partition member 11 can be expanded and contracted according to the change in the amount of sewage in the sewage tank 10, and the volume of the first space 12 can be changed.

  In the above embodiment, the pump 14 is installed outside the sewage tank 10, but the pump 14 may be installed inside the sewage tank 10. Even in this case, since the relationship between the water level and the pressure can be determined in advance, the pump 14 can be operated based on the relationship.

  FIG. 2 is a diagram schematically illustrating a malodor-preventing drainage system 1100 according to the second embodiment of the present invention. In this example, the pump 114 is disposed inside the sewage tank 110.

  In the example of FIG. 2, the malodor-preventing drainage system 1100 is provided in a pit Pi that is a drainage tank installed below the basement portion B of a building (for example, a building) 500. An opening (manhole) 124 is formed in the pit Pi, and a lid 125 is attached to the opening 124. The malodor prevention drainage system 1100 includes a sewage tank 110 provided in the pit Pi, and a pump 114 connected to the outlet 110B of the sewage tank 110. The inflow pipe 120 is inserted into the sewage tank 110 through the lid 125. The inflow pipe 120 is piped from the basement part B through the lid 125 of the pit Pi, and the sewage generated in the basement part B flows into the sewage tank 110 through the inlet 121. The pump 114 sucks dirty water from the suction port 114A. The sewage is connected to the discharge port 114B of the pump 114 and discharged to the sewage basin 91 through the discharge pipe 140 connected to the outlet 110B of the sewage tank 110. The sewage drained into the sewage basin 91 is drained into the public sewer pipe 80 through the sewage basin 93.

  The malodor-preventing drainage system 1100 of the second embodiment includes a tubular member 60 that extends in the vertical direction from the internal space of the sewage tank 110. Here, the “vertical direction” means a vertical direction (vertical direction in FIG. 2) with respect to the installation surface on which the pump 114 and the like are installed. A lower end 62 (see FIG. 2A) of the tubular member 60 is opened to communicate with the internal space of the sewage tank 110. In the example of FIG. 2, the sewage tank 110 is a cylindrical barrel having an open top, but the shape of the sewage tank 110 is not particularly limited. The tubular member 60 terminates in the vicinity of the opening 124 beyond the upper end of the sewage tank 110. However, the position of the upper end of the tubular member 60 is not limited to the illustrated one.

FIG. 2A is a partially enlarged view of FIG. 2 showing the inside of the tubular member 60. As shown in FIG. 2A, a sealing member 61 is attached to the upper end of the tubular member 60, whereby the inner space of the tubular member 60 can be sealed from the outside of the tubular member 60. However, the attachment position of the sealing member 61 is not limited to the illustrated position. The sealing member 61 may be attached to the tubular member 60 below the upper end of the tubular member 60.

  In the second embodiment, the pressure sensor 115 is disposed inside the tubular member 60, and the pressure sensor 115 is attached to the sealing member 61 in the illustrated example. However, the pressure sensor 115 does not necessarily have to be attached to the sealing member 61 and may be attached to the side surface of the tubular member 60. The pressure sensor 115 may be disposed between the lower end 62 and the sealing member 61 in the tubular member 60. The malodor-preventing drainage system 1100 includes a control device 116 disposed in the basement portion B, for example, and the pressure sensor 115 is connected to the control device 116 by wire or wirelessly. The pump 114 is also electrically connected to the controller 116.

A gas layer 112 is provided below the sealing member 61 in the tubular member 60. In this embodiment, although gas is air, the example of gas is not restricted to air. The gas may be, for example, an inert gas such as N ₂ or Ar. In the present embodiment, the pressure sensor 115 is configured to detect a gas pressure. The control device 116 operates the pump 114 in accordance with the gas pressure detected by the pressure sensor 115.

  As the water level in the sewage tank 110 rises, the sewage rises in the tubular member 60. FIG. 2A shows a layer of sewage flowing into the tubular member 60 and an air layer 112 above the sewage layer. The air layer 112 is pressurized by dirty water.

  In the example shown in FIGS. 2 and 2A, the upper end of the tubular member 60 is disposed at a position sufficiently higher than the upper end of the sewage tank 110, and the pressure sensor 115 is located at the upper end of the tubular member 60. Therefore, a partition member that protects the pressure sensor 115 from dirty water is not provided. In this case, the boundary between the first space in which the gas is sealed and the second space filled with sewage in the tubular member 60 is defined by the water level of the sewage in the tubular member 60. However, the partition member may be provided.

  As the tubular member 60 of the second embodiment, a guide pipe that guides the pump 114 to a predetermined position in the sewage tank 110 can be used. The guide pipe is, for example, a metal pipe disposed so as to extend in the vertical direction in the pit Pi. The guide pipe is fixed in advance to the side surface, bottom surface or top surface of the pit Pi using screws, bolts, or the like. A portion of the pump 114 having a shape that can be engaged with the guide pipe can be engaged with the guide pipe to guide the pump 114 along the guide pipe. The guide pipe is held in the sewage tank 110 even after the pump 114 is installed, and is used when the pump 114 is pulled up for maintenance or the like. By adding a sealing member 61 and a pressure sensor 115 as shown in FIG. 2A, an existing guide pipe can be used as the tubular member 60. Thus, it is possible to provide means for easily detecting the level of sewage using existing equipment.

  FIG. 3 is a schematic view showing a malodor-preventing drainage system 200 according to the third embodiment. The third embodiment is substantially the same as the first embodiment except that a position sensor 15A is used instead of the pressure sensor 15. Accordingly, the same reference numerals are used for portions common to the first embodiment, and detailed description thereof is omitted.

  In the third embodiment, the level of sewage is detected by detecting the position of the partition member 11. For example, a position sensor 15 </ b> A such as an infrared sensor or a laser sensor is disposed in the first space 12 so as to face the partition member 11. Specifically, the position sensor 15 </ b> A is attached to the upper wall of the sewage tank 10 so as to face the partition member 11. When the position sensor is used, it is necessary to form an opening on the wall surface of the sewage tank 10 so that the first space 12 is opened to the atmosphere.

  Unlike the first embodiment, the first space 12 is not necessarily closed with respect to the outside of the sewage tank 10. However, it is preferable that the partition member 11 can be operated in the up-down direction in a contact state or a close state with respect to the inner surface of the sewage tank 10. Thereby, it can prevent reliably that the position sensor 15A touches dirty water. Thereby, it is possible to prevent the position sensor 15A from being defective due to adhesion of foreign matter in the sewage, and to accurately detect the level of the sewage.

  Moreover, since the partition member 11 is movable, the position of the partition member 11 also changes according to the change of the sewage water level. For example, the distance d to the partition member 11 decreases as the partition member 11 rises as the sewage water level rises. As the level of sewage falls, the distance d increases as the partition member 11 descends. Thus, the change in the distance d between the position sensor 15A and the partition member 11 (that is, the position of the partition member 11) can be associated with the level of sewage in the sewage tank 10.

  Based on the relationship between the predetermined water level and the position of the partition member 11, the control device 16 turns the pump 14 on when the position of the partition member 11 (starting position) corresponding to the starting water level is detected by the position sensor 15A. to start. When the position (stop position) of the partition member 11 corresponding to the stop water level is detected by the position sensor 15A, the control device 16 stops the pump 14.

  The embodiments of the present invention have been described above based on some examples. However, the above-described embodiments of the present invention are for facilitating understanding of the present invention and do not limit the present invention. . The present invention can be changed and improved without departing from the gist thereof, and the present invention naturally includes equivalents thereof. In addition, any combination or omission of each constituent element described in the claims and the specification is possible within a range where at least a part of the above-described problems can be solved or a range where at least a part of the effect is achieved. It is.

  The present invention can be widely applied to malodor-preventing drainage equipment.

B Basement portion d Distance Pi Pit 10 Sewage tank 10A Inlet 10B Outlet 11 Partition member 11A Through hole 12 First space 13 Second space 14 Pump 14A Suction port 14B Discharge port 15 Pressure sensor 15A Position sensor 16 Controller 20 Inflow piping 21 Opening 20A Check valve 30 Suction piping 40 Discharge piping 40A Check valve 60 Tubular member (guide pipe)
61 Sealing member 62 Lower end 80 Public sewer pipes 91, 93 Sewage basin 100, 100A, 200, 1100 Odor prevention drainage 110 Sewage tank (barrel)
110B Outflow port 112 Air layer 114 Pump 114A Suction port 114B Discharge port 115 Pressure sensor 116 Control device 120 Inflow pipe 121 Inflow port 124 Opening (manhole)
125 Lid 140 Discharge pipe 500 Building

Claims (12)

A water tank having an inlet and an outlet;
A movable partition member capable of separating the inside of the water tank into a first space and a second space communicating with the inflow port and the outflow port;
A water level sensor disposed in the first space and capable of detecting a water level in the water tank;
A pump connected to the outlet and operated according to a detection value of the water level sensor;
Odor prevention type drainage equipment. The malodor-preventing drainage system according to claim 1, wherein the partition member is operable in a vertical direction in a contact state or a close state with respect to an inner surface of the water tank. The malodor-preventing drainage system according to claim 1, wherein the partition member is a stretchable diaphragm member that is fixed to an inner surface of the water tank so as to form the first space. The malodor-preventing drainage system according to any one of claims 1 to 3, wherein the water level sensor is configured to detect a pressure of a gas sealed in the first space. The malodor-preventing drainage system according to claim 4, wherein the first space is closed with respect to the outside of the water tank. An aquarium having an outlet,
A tubular member extending in a vertical direction from the internal space of the water tank, the tubular member having an open end communicating with the internal space of the water tank;
A sealing member which is disposed on the opposite side of the opening end of the tubular member and can seal the internal space of the tubular member from the outside of the tubular member;
A water level sensor disposed between the open end and the sealing member in the tubular member, and capable of detecting a water level in the water tank;
A pump connected to the outlet of the water tank and operated according to a detection value of the water level sensor;
Odor prevention type drainage equipment. The malodor-preventive drainage system according to claim 6, wherein the water level sensor is configured to detect a pressure of a gas layer provided below the sealing member. The malodor-preventing drainage system according to claim 6 or 7, wherein the tubular member includes a guide pipe that guides the pump to a predetermined position in the water tank. The malodor-preventing drainage system according to claim 1 or 2, wherein the water level sensor is a position sensor arranged to face the partition member so as to detect the position of the partition member. An inflow pipe that is inserted through the inflow port and disposed across the first space; and the partition member includes a through hole through which the inflow pipe is inserted;
The inflow pipe opens in the second space;
The malodor prevention drainage system according to any one of claims 1 to 5 and 9. The said water tank is accommodated in the pit which is a drainage tank installed in the position lower than a sewer pipe, and is a sewage tank which temporarily stores the drained sewage. Odor prevention type drainage system. A pump used in a foul odor prevention drainage facility,
The malodor prevention drainage system is
A water tank having an inlet and an outlet;
A movable partition member capable of separating the inside of the water tank into a first space and a second space communicating with the inflow port and the outflow port;
A water level sensor disposed in the first space and capable of detecting a water level in the water tank;
And the pump,
The pump is connected to the outlet and is operated according to a detection value of the water level sensor.