Valve, water processing module, and water processing device

Abstract

To realize a more compact circulation type drain water processing unit.SOLUTION: A valve includes a first cylinder part and a second cylinder part. The first cylinder part has a projection part which is formed in an inside direction along a shaft center at one end, and an opening part is formed on a lateral surface in the neighborhood of the projection part while a first pore having a width in a shaft center direction is formed on the other lateral surface. The second cylinder part shares the shaft center with the first cylinder part, is arranged slidably within the first cylinder part, is brought into contact with an end part of the first pore and, and thereby, has a limit mechanism which receives the limit of movement into the shaft center of the first cylinder part, and an inner diameter has approximately the same diameter with an outer diameter of the projection part. When the limit mechanism is in contact with the end part in a projection part direction of the first hole, the second cylinder part is closed by the projection part. When the limit mechanism is in contact with an end part in a direction opposite the projection part of the first hole, the second cylinder part is separated from the projection part, and the second cylinder part and the opening part are connected with each other.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a valve, a water treatment module, and a water treatment device. [Background technology]

[0002] A circulating human waste treatment method has been proposed (see Patent Document 1). In the circulating human waste treatment method described in Patent Document 1, wastewater discharged from toilets is transferred in sequence to a solid-liquid separation tank, a membrane separation intermittent aeration tank, and an ozone decolorization tank to produce treated water that is oxidized and decolorized, and the treated water is sent by natural advection to a downstream storage tank. The treated water stored in the storage tank is then sent by a shallow well pump (water supply pump) as toilet flushing water and reused. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-086991 A Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, an air-driven transfer pump is provided to transfer the primary treated water, from which solids have been removed by natural settling and filtering media, to a downstream membrane separation intermittent aeration tank. In order to further reduce the scale of a water circulation system, there is room for improvement in the supply of water between the tanks.

[0005] The present disclosure aims to realize a more compact circulation-type wastewater treatment unit. [Means for solving the problem]

[0006] The valve includes a first cylindrical portion and a second cylindrical portion. The first cylindrical portion has a protrusion formed inward along the axis at one end, an opening formed on a side surface near the protrusion, and a first hole having a width in the axis direction formed on the other side surface. The second cylindrical portion shares an axis with the first cylindrical portion, is slidably disposed within the first cylindrical portion, and has a limiting mechanism that contacts an end of the first hole to limit the movement of the first cylindrical portion in the axis direction, and has an inner diameter approximately equal to the outer diameter of the protrusion. When the limiting mechanism contacts an end of the first hole in the protrusion direction, the second cylindrical portion is blocked by the protrusion. When the limiting mechanism contacts an end of the first hole in the opposite direction to the protrusion, the second cylindrical portion separates from the protrusion, and the second cylindrical portion and the opening are connected. Effect of the Invention

[0007] According to the present disclosure, a more compact circulation-type wastewater treatment unit can be realized. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a circulation-type wastewater treatment unit 1 according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view showing an example of the structure of a wastewater adjustment tank 10 and a biological treatment tank 20 according to the present embodiment. [Diagram 3] 3 is an external view of the wastewater adjustment tank 10 and the biological treatment tank 20 shown in FIG. 2, viewed from the side of the biological treatment tank 20. FIG. [Figure 4] 3 is a cross-sectional view of the biological treatment tank 20 shown in FIG. 2. [Diagram 5] FIG. 5 is a perspective view of the valve 26 shown in FIG. [Figure 6] 6 is an external view of the valve 26 shown in FIG. 5, seen from the bottom side. [Figure 7] FIG. 6 is a cross-sectional view of the valve 26 shown in FIG. [Figure 8] FIG. 6 is a perspective view of an L-shaped member 261 shown in FIG. [Figure 9] 9 is a perspective view of the L-shaped member 261 shown in FIG. 8 cut along the CC cross section. [Figure 10]6 is a perspective view of a valve member 262, a lever portion 263, and a float 264 shown in FIG. 5. [Figure 11] 11 is a perspective view of the valve member 262 shown in FIG. 10 taken along the cross section DD. [Figure 12] FIG. 8 is a perspective view of the protrusion 265 shown in FIG. [Figure 13] 13 is a perspective view of the valve 26 when the float 264 moves in the circumferential direction of the first cylindrical portion 2611. FIG. [Figure 14] FIG. 14 is a cross-sectional view of the valve 26 shown in FIG. [Figure 15] 13 is a perspective view of the valve 26 when the float 264 moves in the axial direction of the first cylindrical portion 2611. FIG. [Figure 16] FIG. 16 is a cross-sectional view of the valve 26 shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present application will be described in detail with reference to the drawings. In the drawings for explaining the embodiment, the same components are generally designated by the same reference numerals, and the repeated description will be omitted.

[0010] <1. Overview> The circulating wastewater treatment unit 1 according to this embodiment is a device for regenerating wastewater (hereinafter simply referred to as wastewater) discharged from a consumer in, for example, a water circulation system. The regenerated water can be used for daily life purposes such as toilet flushing, bathing, showering, laundry, washing dishes, etc. The regenerated water may also be used as drinking water.

[0011] The water circulation system includes, for example, a treatment tank module in which an adjustment tank, a biological treatment tank, and a water storage tank are compactly arranged to treat and purify wastewater (domestic wastewater, sewage, etc.) discharged from a consumer. Valves are attached to the piping between the tanks to prevent the piping from becoming complicated. The water circulation system includes, for example, a filtration unit having a physical filter such as a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane, a microfiltration membrane, etc., as well as a biological filter, and a chemical filter such as activated carbon, zeolite, and ion exchange resin. The filtration unit filters, for example, water taken from a specific water source. The filtration unit also filters, for example, water treated in the treatment tank module. At least a part of the filtration unit may be installed, for example, away from the treatment tank module. For example, the treatment tank module may be placed under the eaves, etc., and a part of the filtration unit may be placed indoors or outdoors but in an easily accessible position.

[0012] The water circulation system also includes, for example, a UV sterilization unit that sterilizes the water to be provided. The water circulation system also includes, for example, an ozone generator. The ozone generator generates ozone gas for, for example, deodorizing the treatment tank module, sterilizing the water in the treatment tank module, decolorizing the water in the treatment tank module, etc. The water circulation system also includes, for example, a sensor unit that detects various physical properties in the treatment tank module.

[0013] <2. Overall composition> Fig. 1 is a block diagram showing an example of the configuration of a circulating wastewater treatment unit 1 according to this embodiment. Fig. 1 shows an example in which the circulating wastewater treatment unit 1 is used in a circulating toilet 100.

[0014] The circulating toilet 100 according to this embodiment is used as a toilet in, for example, a residence, a villa, a mountain hut, a temporary house, or a mobile house built in a mountainous area or the like where water supply and sewage systems are not available. The circulating toilet 100 is also used as a temporary toilet installed, for example, at an outdoor event venue, a construction site, or an evacuation shelter during a disaster. By using the circulating toilet 100, it is possible to treat wastewater and reuse it as circulating water, so the toilet can be used even if water supply and sewage systems are not installed.

[0015] The circulating wastewater treatment unit 1 according to this embodiment can be used in applications other than the circulating toilet 100. The circulating wastewater treatment unit 1 may be used, for example, to regenerate wastewater used in a kitchen, a washroom (laundry), a bathroom, etc. In this case, for example, in the water circulation system, a filtration unit, a UV sterilization unit, etc. may be installed between the final stage water tank and the actual use of water by the consumer. Also, in the water circulation system, toilet wastewater and wastewater used in the kitchen, washroom (laundry), a bathroom, etc. may be treated in different treatment systems.

[0016] As shown in FIG. 1, the circulating wastewater treatment unit 1 is connected to a toilet bowl 2 by a plurality of drain pipes. The circulating wastewater treatment unit 1 includes a wastewater adjustment tank 10, a biological treatment tank 20, a treated water storage tank 30, and an ozone generator 40. The wastewater adjustment tank 10, the biological treatment tank 20, and the treated water storage tank 30 are connected by a plurality of drain pipes so that water can be sent between predetermined tanks. At least one of the plurality of drain pipes is provided with a pump, and the operation of each pump is controlled so that the water level in the tank to which the pump is sent is within a predetermined range and constant continuous operation is performed as much as possible. Note that FIG. 1 is merely an example, and the circulating wastewater treatment unit 1 may have another configuration. For example, the wastewater adjustment tank 10, the biological treatment tank 20, and the treated water storage tank 30 may be included in one module that performs a series of processes.

[0017] <3. Drainage adjustment tank 10> The wastewater adjustment tank 10 is disposed downstream of the toilet 2 and temporarily stores the wastewater discharged from the toilet 2. The toilet 2 may be equipped with, for example, a pulverizing pressure pump. The pulverizing pressure pump pulverizes sewage and the like contained in the wastewater and sends the pulverized sewage together with the wastewater to the wastewater adjustment tank 10. The wastewater adjustment tank 10 is provided with a blower 11. The blower 11 sends air into the wastewater adjustment tank 10 continuously or intermittently. The air sent from the blower 11 agitates the wastewater stored inside the wastewater adjustment tank 10.

[0018] The wastewater adjustment tank 10 and the biological treatment tank 20 are connected by piping 13. A pump 66 is installed in the piping 13. When the pump 66 is driven at a predetermined timing, the wastewater stored in the wastewater adjustment tank 10 is supplied to the biological treatment tank 20 via the piping 13. The predetermined timing is, for example, the timing at which the supply of wastewater from the wastewater adjustment tank 10 to the biological treatment tank 20 begins.

[0019] Furthermore, by driving the pump 66 at a predetermined timing, the water stored in the biological treatment tank 20 is supplied to the wastewater adjustment tank 10 via the pipe 13. The predetermined timing is, for example, a predetermined period of time after the water level in the biological treatment tank 20 reaches a predetermined height.

[0020] <4. Biological treatment tank 20> The biological treatment tank 20 uses microorganisms to decompose the organic compounds contained in the wastewater discharged from the wastewater adjustment tank 10. The biological treatment tank 20 may also carry out biological denitrification, which uses the action of microorganisms to remove nitrogen compounds. Biological denitrification combines aerobic microorganisms and facultative anaerobic bacteria to decompose nitrogen and carbon compounds in the wastewater. This method is mainly divided into a nitrification process carried out in an aerobic environment and a denitrification process carried out in an anoxic environment.

[0021] In the nitrification process, nitrifying bacteria oxidize ammonia (NH4) in the wastewater to nitrite (NO2) or nitrate (NO3). Nitrifying bacteria are a type of aerobic bacteria that require sufficient dissolved oxygen in the tank.

[0022] In the denitrification process, the water nitrified in the nitrification process is placed under anaerobic conditions without dissolved oxygen, and nitrite and nitrate are reduced to nitrogen gas (N2) using the nitrate or nitrite respiration of denitrifying bacteria.

[0023] The biological treatment tank 20 includes, for example, an anoxic tank 21 and an aerobic tank 22. The anoxic tank 21 is disposed, for example, upstream of the aerobic tank 22. The biological treatment tank 20 is provided with, for example, a drainage channel (not shown) that allows the mixed liquid in the tank to move between the anoxic tank 21 and the aerobic tank 22.

[0024] The mixed liquid in the anoxic tank 21 contains denitrifying bacteria, which are facultative anaerobic bacteria. The denitrification process is mainly carried out in the anoxic tank 21. An agitator 23 is disposed inside the anoxic tank 21. The agitator 23 is realized, for example, by a mixer having an agitating blade. The agitator 23 agitates the mixed liquid by rotating the agitating blade inside the anoxic tank 21, promoting contact between the microorganisms contained in the mixed liquid and organic matter, etc. Note that the agitation in the anoxic tank 21 is not limited to that performed by the agitator 23. Agitation may also be performed by a pump, aeration, etc.

[0025] Nitrifying bacteria, which are aerobic bacteria, exist in the mixed liquid in the aerobic tank 22. The nitrification process mainly takes place in the aerobic tank 22. A blower 27 is provided in the aerobic tank 22. The blower 27 supplies air to the mixed liquid in the aerobic tank 22. By sending air from the blower 27 into the mixed liquid, an aerobic environment in the aerobic tank 22 is maintained.

[0026] The aerobic tank 22 is provided with a membrane filtration unit 25. For example, at least one of a microfiltration membrane (MF), an ultrafiltration membrane (UF), a nanofiltration membrane (NF), a ceramic filter, and a metal membrane is used for the membrane filtration unit 25. For example, the membrane filtration unit 25 is disposed above an air supply port supplied from a blower 27. The air supplied from the blower 27 is used for cleaning the membrane filtration unit 25. The membrane filtration unit 25 filters the biologically treated water to produce treated water. A pump 67 is installed between the biological treatment tank 20 and the treated water storage tank 30. The pump 67 sends the treated water filtered by the membrane filtration unit 25 to the treated water storage tank 30.

[0027] The biological treatment tank 20 may have a different configuration. For example, the biological treatment tank 20 may not include the anoxic tank 21 and the aerobic tank 22, and may be a single tank.

[0028] <5. Supply section 90> The biological treatment tank 20 is provided with a supply unit 90 that continuously supplies organic matter to the inside of the biological treatment tank 20. The supply unit 90 supplies organic matter to the anoxic tank 21 of the biological treatment tank 20. The organic matter is a compound that is supplied as a substrate for microorganisms in the biological treatment tank 20. When the circulating toilet 100 is not used for a long period of time, the supply of wastewater containing organic matter to the biological treatment tank 20 is halted, and the microorganisms in the biological treatment tank 20 may die due to a lack of substrate. In order to prevent this, it is necessary to supply organic matter to the biological treatment tank 20. That is, by continuously supplying organic matter to the anoxic tank 21, it is possible to continue supplying substrate to the facultative anaerobic bacteria present in the anoxic tank 21. From the viewpoint of handling, the organic matter is preferably a fluid. Note that the fluid is not limited to a liquid, and also includes substances in a gel state. In addition, a low molecular structure is preferable as the fluid, and for example, an organic compound having 3 or less carbon atoms is more preferable. This is because compounds having a low molecular structure having 3 or less carbon atoms are more biodegradable.

[0029] The organic matter may also be a hydrogen donor. A hydrogen donor is a substance that provides hydrogen to other substances in the biological treatment tank 20 to cause reduction, and is itself dehydrogenated and oxidized.

[0030] For example, in a state where the denitrification reaction by facultative anaerobic bacteria in the anoxic tank 21 is frequently used, an anoxic atmosphere without dissolved oxygen and the presence of a hydrogen donor necessary for reducing oxygen molecules of nitrite and nitrate are essential. By supplying a hydrogen donor to the anoxic tank 21, the reduction reaction of oxygen molecules of nitrite and nitrate is promoted in the anoxic tank 21. An example of an organic matter that is a fluid that also acts as a hydrogen donor in this way is ethanol.

[0031] The supply unit 90 has, for example, a constant-amount dispensing and dripping device. The constant-amount dispensing and dripping device drips organic matter into the anoxic tank 21 intermittently, for example, at a plurality of intervals. The amount of organic matter supplied from the constant-amount dispensing and dripping device can be set arbitrarily. In this case, the supply amount of organic matter may be set based on the amount of wastewater. The supply amount of organic matter can be set, for example, for a predetermined period (for example, a week, a month, a season, etc.).

[0032] The supply unit 90 may have a device capable of constantly supplying a predetermined flow rate of organic matter instead of a constant amount dispensing drip device. In this case, the supply unit 90 continuously drips a predetermined amount of organic matter into the anoxic tank 21. Note that the supply unit 90 is not necessarily required.

[0033] <6. Treated water storage tank 30> The treated water storage tank 30 is a tank that stores treated water obtained by biologically treating wastewater. That is, the treated water storage tank 30 stores treated water to be supplied to the toilet 2. In other words, the treated water storage tank 30 stores treated water obtained by treating wastewater in the biological treatment tank 20. A pipe 41 leading to the toilet 2 is connected to the treated water storage tank 30.

[0034] Pump 63 provided in piping 41 supplies treated water for flushing the toilet 2 to the toilet 2 through piping 41. Pump 63 is driven, for example, when the toilet 2 is used. Pump 63 may be driven in response to an instruction from a user, or in response to detection of use of the toilet 2. Furthermore, when it is expected that the circulating toilet 100 will not be used for an extended period of time, pump 63 may be driven at predetermined intervals.

[0035] The treated water storage tank 30 is supplied with ozone gas generated by an ozone generator 40, for example. The ozone generator 40 supplies ozone gas into the water to be treated in the treated water storage tank 30, i.e., into the liquid phase of the treated water storage tank 30. The ozone generator 40 may also supply ozone gas into the gas phase of the treated water storage tank 30.

[0036] Methods of generating ozone gas by the ozone generator 40 include, for example, a discharge method (silent discharge method), an electrolysis method (water electrolysis cell method), and an ultraviolet method (mercury UV lamp method / mercury-free UV lamp (excimer lamp) method). Of these, the ultraviolet method (mercury-free UV lamp (excimer lamp) method) is preferable. The ultraviolet method (mercury-free UV lamp (excimer lamp) method) does not generate harmful nitrogen oxides from nitrogen present in the atmosphere when generating ozone gas, and can generate ozone gas with few impurities. Therefore, it is particularly suitable as a method to be adopted in an ozone generator mounted on a small water circulation system installed in a home or the like. By generating ozone gas with few impurities, the operating time of the ozone generator 40 can be reduced, power consumption can be reduced, and the life of the ozone generator 40 can be extended. By generating ozone gas with few impurities, it is possible to reduce the size of the water circulation system equipment and reduce the number of deteriorated and damaged parts, which also leads to a reduction in the frequency of maintenance. In this way, the ozone generator 40 using the ultraviolet method (mercury-free UV lamp (excimer lamp) method) is suitable for small-scale distributed water reclamation.

[0037] In the treated water storage tank 30, the ozone gas decolorizes, sterilizes, and deodorizes the treated water (hereinafter referred to as ozone treatment) by its strong oxidizing power. Of the ozone gas supplied to the treated water, the surplus ozone gas (gas in the tank) that was not used in the ozone treatment of the treated water fills the space formed in the upper part of the treated water storage tank 30, and is then supplied to the wastewater adjustment tank 10 and / or the biological treatment tank 20, making it possible to reuse it.

[0038] In this embodiment, the concentration of ozone gas supplied to the treated water storage tank 30 can be lower than the concentration of ozone gas supplied to a decolorization tank provided in an existing water purification facility, for example. In an existing water purification facility, the time that water is stored in the decolorization tank (ozone treatment tank) is short, so that the ozone gas and the water need to be contacted in a short time. On the other hand, in this embodiment, the treated water is stored in the treated water storage tank 30 for a long time, so that the ozone gas and the treated water are in contact with each other for a long time. Due to this difference in storage time, the concentration of ozone gas supplied to the treated water storage tank 30 may be lower than the concentration of ozone gas supplied to a decolorization tank provided in an existing water purification facility.

[0039] <7. Structure of the wastewater adjustment tank 10 and the biological treatment tank 20> Fig. 2 is a perspective view showing an example of the structure of the wastewater adjustment tank 10 and the biological treatment tank 20 according to this embodiment. Fig. 3 is an external view of the wastewater adjustment tank 10 and the biological treatment tank 20 shown in Fig. 2, seen from the side of the biological treatment tank 20. The circulating wastewater treatment unit 1 also has a treated water storage tank 30, but the treated water storage tank 30 is not shown in Figs. 2 and 3.

[0040] As shown in Figures 2 and 3, the bottom surface of the wastewater adjustment tank 10 is located higher than the bottom surface of the biological treatment tank 20. The wastewater adjustment tank 10 and the biological treatment tank 20 are connected by a pipe 13. The wastewater adjustment tank 10 is connected to the pipe 13 by a connection port 12. The connection port 12 is formed, for example, on the side surface near the bottom of the wastewater adjustment tank 10. The biological treatment tank 20 is connected to the pipe 13 by a connection port 24. The connection port 24 is formed, for example, at a predetermined height of the biological treatment tank 20. The height at which the connection port 24 is formed corresponds, for example, to the water level when the biological treatment tank 20 is full.

[0041] The wastewater stored in the wastewater adjustment tank 10 is supplied to the biological treatment tank 20 by utilizing the principle of a siphon. When starting to supply wastewater from the wastewater adjustment tank 10 to the biological treatment tank 20, the control unit of the circulation-type wastewater treatment unit 1 drives, for example, the pump 66. At this time, the control unit drives the pump 66 so as to draw in the wastewater stored in the wastewater adjustment tank 10. The control unit drives the pump 66 for a predetermined period of time, and when wastewater is supplied from the wastewater adjustment tank 10 to the biological treatment tank 20, stops the operation of the pump 66. After the pump 66 is driven and wastewater is supplied from the wastewater adjustment tank 10 to the biological treatment tank 20, the piping 13 is filled with water, so that in principle, wastewater continues to be supplied from the wastewater adjustment tank 10 to the biological treatment tank 20 until the water level of the wastewater adjustment tank 10 and the water level of the biological treatment tank 20 match. By forming the connection port 12 on the side surface near the bottom of the wastewater adjustment tank 10, wastewater is supplied to the biological treatment tank 20 even when the water level in the wastewater adjustment tank 10 is low. In addition, since organic matter present in large amounts at the bottom of the wastewater adjustment tank 10 is more easily discharged into the biological treatment tank 20, nutrients are supplied to the organisms in the biological treatment tank 20, making it possible to maintain the environment within the biological treatment tank 20.

[0042] For example, when the water level in the biological treatment tank 20 reaches a predetermined height, the control unit drives the pump 66. At this time, the control unit drives the pump 66 to draw in wastewater stored in the biological treatment tank 20. By driving the pump 66 for a predetermined period of time, the control unit stops the operation of the pump 66 when the water level in the biological treatment tank 20 becomes low.

[0043] FIG. 4 is a cross-sectional view of the biological treatment tank 20 shown in FIG. 2. The cross-sectional view shown in FIG. 4 represents a cross-sectional view of the AA cross section in FIG. 2. As shown in FIG. 4, inside the biological treatment tank 20, a valve 26 is connected to the connection port 24. In FIG. 4, the valve 26 is connected to the piping inside the biological treatment tank 20, and the valve 26 adjusts the water supply between the wastewater adjustment tank 10 and the biological treatment tank 20. Therefore, it is possible to express that the valve 26 is disposed between the wastewater adjustment tank 10 and the biological treatment tank 20. In other words, the valve 26 according to this embodiment is a valve disposed between the tanks. The valve 26 is realized, for example, by a resin such as polyvinyl chloride. Note that the valve 26 is not limited to a resin as long as it has high resistance to deterioration. The valve 26 may be realized, for example, by a surface-treated metal (for example, stainless steel), carbon, glass, wood, bamboo, or the like.

[0044] <8. Structure of Valve 26> Fig. 5 is a perspective view of valve 26 shown in Fig. 4. Fig. 6 is an external view of valve 26 shown in Fig. 5, seen from the bottom side. Fig. 7 is a cross-sectional view of valve 26 shown in Fig. 5. The cross-sectional view shown in Fig. 7 is a cross-sectional view taken along line BB in Fig. 5. Valve 26 shown in Figs. 5 to 7 has an L-shaped member 261, a valve member 262, a lever portion 263, a float 264, and a protrusion 265.

[0045] Fig. 8 is a perspective view of the L-shaped member 261 shown in Fig. 5. Fig. 9 is a perspective view of the L-shaped member 261 shown in Fig. 8 cut at the CC section. The L-shaped member 261 has a first cylindrical portion 2611 and a second cylindrical portion 2612. The second cylindrical portion 2612 is connected, for example, substantially perpendicularly to an end of the first cylindrical portion 2611. The outer diameter of the first cylindrical portion 2611 is substantially the same as the outer diameter of the second cylindrical portion 2612. The inner diameter of the first cylindrical portion 2611 is substantially the same as the inner diameter of the second cylindrical portion 2612.

[0046] The first cylindrical portion 2611 has a first opening 26111, a first hole 26112, a second hole 26113, and a third hole 26114. The first cylindrical portion 2611 has a predetermined length, and there is no limit to the length.

[0047] The first opening 26111 is formed at the end opposite to the end to which the second cylindrical portion 2612 is connected.

[0048] The first hole 26112 is formed on the side surface of the first cylindrical portion 2611. The first hole 26112 is formed in a direction tilted by a predetermined angle from the axial direction of the second cylindrical portion 2612 toward the circumferential direction of the first cylindrical portion 2611. The first hole 26112 is formed at a position separated by a predetermined distance from the position where the second cylindrical portion 2612 is connected toward the first opening 26111 along the axial direction of the first cylindrical portion 2611. The first hole 26112 has a predetermined width in the circumferential direction of the first cylindrical portion 2611 and a predetermined width in the axial direction of the first cylindrical portion 2611. This allows the lever portion 263 to move in the circumferential direction and the axial direction of the first cylindrical portion 2611, and also makes it possible to limit the movement beyond a preset limit.

[0049] The second hole 26113 is formed on the side surface of the first cylindrical portion 2611. The second hole 26113 is formed in approximately the same direction as the axial direction of the second cylindrical portion 2612. The second hole 26113 is formed at a position spaced a predetermined distance from the position where the first hole 26112 is formed in the direction of the first opening 26111 along the axial direction of the first cylindrical portion 2611. The second hole 26113 has an approximately circular shape.

[0050] The third hole portion 26114 is formed at the end of the first cylindrical portion 2611 on the side to which the second cylindrical portion 2612 is connected. The diameter of the third hole portion 26114 is smaller than the inner diameter of the first hole portion 26112.

[0051] The second cylindrical portion 2612 has a second opening 26121. The length of the second cylindrical portion 2612 is a predetermined length, and there is no limitation on the length.

[0052] Fig. 10 is a perspective view of the valve member 262, lever portion 263, and float 264 shown in Fig. 5. Fig. 11 is a perspective view of the valve member 262 shown in Fig. 10 cut at the DD cross section. The valve member 262 is cylindrical in shape. The lever portion 263 is rod-shaped, and is attached to approximately the center of the valve member 262. The length of the lever portion 263 is set in advance based on the relationship of how much the valve member 262 should be closed in response to the amount of fluctuation in the water level in the biological treatment tank 20. The float 264 is attached to the tip of the lever portion 263. The float 264 is hollow, and is structured to float on water.

[0053] The valve member 262 has a third opening 2621 , a fourth hole portion 2622 , a step portion 2623 , and a fourth opening 2624 .

[0054] The third opening 2621 is formed at one end of the valve member 262 .

[0055] The fourth hole portion 2622 is formed on a side surface of the valve member 262. The fourth hole portion 2622 is formed in a direction tilted at a predetermined angle from the axial direction of the lever portion 263 toward the circumferential direction of the valve member 262. The fourth hole portion 2622 is formed at a position spaced a predetermined distance from the third opening 2621 toward the other end along the axial direction of the valve member 262. The fourth hole portion 2622 has a substantially circular shape. The diameter of the fourth hole portion 2622 is substantially the same as the diameter of the second hole portion 26113.

[0056] The step portion 2623 has an inner diameter that is discontinuously narrowed. The step portion 2623 is formed at a position spaced a predetermined distance from the fourth hole portion 2622 toward the other end along the axial direction of the valve member 262.

[0057] The fourth opening 2624 is formed at an end different from the third opening 2621. The inner diameter of the fourth opening 2624 is smaller than the inner diameter of the third opening 2621. The inner diameter of the fourth opening 2624 is approximately the same as the diameter of the third hole portion 26114.

[0058] Fig. 12 is a perspective view of the protrusion 265 shown in Fig. 7. The protrusion 265 shown in Fig. 12 has a flange portion 2651, a cylindrical portion 2652, a tapered portion 2653, and a tip portion 2654.

[0059] The flange portion 2651 has a circular shape with a predetermined thickness. The thickness of the flange portion 2651 is, for example, approximately the same as the thickness of the wall portion of the L-shaped member 261. The diameter of the flange portion 2651 is smaller than the outer diameter of the first cylindrical portion 2611 and larger than the diameter of the third hole portion 26114.

[0060] The cylindrical portion 2652 has a cylindrical shape. The diameter of the cylindrical portion 2652 is approximately the same as the diameter of the third hole portion 26114. The length of the cylindrical portion 2652 in the axial direction is approximately the same as the outer diameter of the second cylindrical portion 2612.

[0061] The tapered portion 2653 has a diameter that narrows at a predetermined gradient from the cylindrical portion 2652 to the tip portion 2654. The tip portion 2654 has a predetermined length in the axial direction.

[0062] The valve 26 shown in FIG. 5 is formed by combining an L-shaped member 261, a valve member 262, a lever portion 263, a float 264, and a protrusion portion 265. Specifically, the valve member 262 is slidably arranged inside the L-shaped member 261 with its axis being common to that of the first cylindrical portion 2611 of the L-shaped member 261. In FIG. 5, the lever portion 263 connected to the side surface of the valve member 262 contacts the lower end 261121 and the left end 261123 of the first hole portion 26112. In this case, the fourth hole portion 2622 and the second hole portion 26113 overlap. Also, in this case, the cylindrical portion 2652 of the protrusion portion 265, which is fitted into the third hole portion 26114 with the flange portion 2651 as a stopper, is fitted into the fourth opening portion 2624 of the valve member 262.

[0063] The valve member 262 moves in the circumferential direction and / or axial direction of the first cylindrical portion 2611 within the L-shaped member 261 when the pump 66 is driven or when the float 264 moves up and down.

[0064] Fig. 13 is a perspective view of valve 26 when float 264 moves in the circumferential direction of first cylindrical portion 2611. Fig. 14 is a cross-sectional view of valve 26 shown in Fig. 13. The cross-sectional view shown in Fig. 14 represents a cross-sectional view taken along line BB in Fig. 13.

[0065] 13, the lever portion 263 connected to the side surface of the valve member 262 is in contact with the upper end 261122 and the left end 261123 of the first hole portion 26112. In this case, the valve member 262 has rotated in the circumferential direction about the axis of the first cylindrical portion 2611 from the position shown in Fig. 5, for example. As a result, the fourth hole portion 2622 and the second hole portion 26113 are misaligned in the circumferential direction.

[0066] Fig. 15 is a perspective view of valve 26 when float 264 moves in the axial direction of first cylindrical portion 2611. Fig. 16 is a cross-sectional view of valve 26 shown in Fig. 15. The cross-sectional view shown in Fig. 16 represents a cross-sectional view taken along line BB in Fig. 15.

[0067] 15, the lever portion 263 connected to the side surface of the valve member 262 is in contact with the lower end 261121 and the right end 261124 of the first hole portion 26112. In this case, the valve member 262 has moved in the axial direction of the first cylindrical portion 2611 from the position shown in FIG. 5. As a result, the fourth hole portion 2622 and the second hole portion 26113 are displaced in the axial direction. In addition, the fourth opening portion 2624 is separated from the cylindrical portion 2652, and a space is generated between the inner wall of the fourth opening portion 2624 and the tapered portion 2653.

[0068] <9. Operation of Valve 26> (9.1. Supply of water from the wastewater adjustment tank 10 to the biological treatment tank 20) Wastewater is supplied from the wastewater adjustment tank 10 to the biological treatment tank 20 by the principle of a siphon. When the water level in the biological treatment tank 20 does not reach the float 264, the valve 26 is in the state shown in Figs. 5 to 7. That is, the valve member 262 is disposed inside the L-shaped member 261. The lever portion 263 connected to the side of the valve member 262 contacts the lower end 261121 and the left end 261123 of the first hole portion 26112. The fourth hole portion 2622 and the second hole portion 26113 overlap. The cylindrical portion 2652 of the protrusion portion 265, which is fitted into the third hole portion 26114 with the flange portion 2651 as a stopper, is fitted into the fourth opening 2624 of the valve member 262.

[0069] Wastewater supplied from the wastewater adjustment tank 10 by utilizing the difference in water level between the wastewater adjustment tank 10 and the biological treatment tank 20 enters the valve 26 from the first hole 26112 and is discharged to the biological treatment tank 20 via the fourth hole 2622 and the second hole 26113. At this time, since the fourth opening 2624 is blocked by the columnar portion 2652, the wastewater does not reach the second cylindrical portion 2612.

[0070] Wastewater is supplied from the wastewater adjustment tank 10 to the biological treatment tank 20, and the water level in the biological treatment tank 20 rises and becomes the same as the water level in the wastewater adjustment tank 10. When this happens, the supply of wastewater from the wastewater adjustment tank 10 stops.

[0071] When the water level of the wastewater adjustment tank 10 is higher than the float 264 of the valve 26 attached to the biological treatment tank 20 in the state shown in FIG. 5, the float 264 floats up due to the water stored in the biological treatment tank 20. As the lever portion 263 leaves the lower end 261121 of the first hole portion 26112 and moves to the upper end 261122, the valve member 262 rotates in the circumferential direction of the axis of the first cylindrical portion 2611. When the valve member 262 rotates, the fourth hole portion 2622 moves away from the second hole portion 26113, and the hole formed by the communication between the fourth hole portion 2622 and the second hole portion 26113 is closed. This stops the supply of wastewater from the wastewater adjustment tank 10 to the biological treatment tank 20. That is, when the water level of the biological treatment tank 20 reaches a predetermined height, the discharge of wastewater from the wastewater adjustment tank 10 to the biological treatment tank 20 automatically stops.

[0072] (9.2. Supply of water from biological treatment tank 20 to wastewater adjustment tank 10) When returning water from the biological treatment tank 20 to the wastewater adjustment tank 10, the pump 66 is driven and the water in the valve 26 is drawn into the pump 66. When the water in the valve 26 is drawn, the valve member 262 moves toward the first opening 26111 along the axis of the first cylindrical portion 2611. The valve member 262 moves until the lever portion 263 contacts the right end 261124 of the first hole portion 26112. When the lever portion 263 moves away from the left end 261123, the fourth hole portion 2622 moves away from the second hole portion 26113, and the hole formed by the communication between the fourth hole portion 2622 and the second hole portion 26113 is closed. In addition, the cylindrical portion 2652 that was fitted into the fourth opening 2624 is removed from the fourth opening 2624. As a result, the valve 26 is in the state shown in FIGS. 15 and 16, and a gap is generated between the tapered portion 2653 and the fourth opening 2624.

[0073] 15 and 16 , when the pump 66 continues to suck water from the biological treatment tank 20, the water is sucked up from the second opening 26121. The water sucked up from the second opening 26121 passes through the gap between the tapered portion 2653 and the fourth opening 2624, and is sent out from the first hole portion 26112. The water sent out from the first hole portion 26112 is supplied to the drainage adjustment tank 10 via the pump 66.

[0074] When the control unit stops the pump 66, wastewater is supplied from the wastewater adjustment tank 10 to the biological treatment tank 20 due to the siphon principle, and the step portion 2623 of the valve member 262 receives the pressure of the wastewater supplied from the wastewater adjustment tank 10. As a result, the valve member 262 is pushed in the direction of the protrusion 265, and the cylindrical portion 2652 is pushed into the fourth opening 2624.

[0075] As described above, in the above embodiment, valve 26 has float 264, lever portion 263, L-shaped member 261, and valve member 262. Lever portion 263 is connected to float 264. L-shaped member 261 is cylindrical, and has a first hole (second hole portion 26113) and a second hole (first hole portion 26112) that limits movement of lever portion 263 formed on its side. Valve member 262 is cylindrical, shares an axis with L-shaped member 261, and is slidably disposed within L-shaped member 261 such that a portion of the valve member 262 is visible through first hole portion 26112. The valve member 262 has a lever portion 263 connected to the region, and the float 264 moves in the circumferential direction of the first cylindrical portion 2611 of the L-shaped member 261 to rotate around the axis, and when the lever portion 263 is in contact with the lower end of the first hole portion 26112, a third hole (fourth hole portion 2622) is formed at a position overlapping with the second hole portion 26113. As a result, the float 264 moves in the circumferential direction of the first cylindrical portion 2611, and the position of the fourth hole portion 2622 with respect to the first hole portion 26112 changes. Therefore, when the float 264 is in an appropriate position, the fourth hole portion 2622 and the first hole portion 26112 overlap, and water is supplied from the overlapping holes. On the other hand, when the float 264 is not in an appropriate position, the fourth hole portion 2622 and the first hole portion 26112 do not overlap, and the supply of water is stopped.

[0076] Therefore, the supply of water from the wastewater adjustment tank 10 to the biological treatment tank 20 can be switched on and off depending on the water level in the biological treatment tank 20, making it possible to realize a more compact circulatory wastewater treatment unit. Furthermore, the valve 26 according to this embodiment does not use packing. Packing may deteriorate due to chlorine water, UV, sludge, ozone gas, etc. Since the valve 26 according to this embodiment does not have packing, there is less concern about performance degradation due to deterioration even when the valve 26 is used in an environment where chlorine water, UV, sludge, ozone gas, etc. are present. In addition, the number of times parts need to be replaced is reduced.

[0077] In the above embodiment, the L-shaped member 261 has a protrusion 265 along the axis, the protrusion 265 having an outer diameter substantially equal to the inner diameter of the valve member 262. The valve member 262 is movable in the axial direction within the L-shaped member 261. When the lever portion 263 of the valve member 262 is in contact with the end 261123 of the first hole portion 26112 facing the protrusion 265, the protrusion 265 fits inside, and the axial position of the second hole portion 26113 and the axial position of the fourth hole portion 2622 substantially coincide. When the lever portion 263 of the valve member 262 is in contact with the end 261124 of the first hole portion 26112 facing the protrusion 265, the protrusion 265 comes out from the inside, and the axial position of the second hole portion 26113 does not coincide with the axial position of the fourth hole portion 2622. As a result, when the valve member 262 is blocked by the protrusion 265, the second hole 26113 and the fourth hole 2622 can overlap with each other. On the other hand, when the protrusion 265 is removed from the valve member 262, the second hole 26113 and the fourth hole 2622 do not overlap with each other.

[0078] In this way, the valve 26 makes it possible to manage the supply of water from the wastewater adjustment tank 10 to the biological treatment tank 20 and the supply of water from the biological treatment tank 20 to the wastewater adjustment tank 10, thereby making it possible to reduce unnecessary piping in the circulating wastewater treatment unit 1.

[0079] In the above embodiment, the valve 26 includes a first tube portion (first cylindrical portion) 2611 and a second tube portion (valve member) 262. The first tube portion 2611 has a protrusion 265 formed inward along the axis at one end, an opening portion (second cylindrical portion) 2612 is formed on a side surface near the protrusion 265, and a first hole 26112 having a width in the axis direction is formed on the other side surface. The second tube portion 262 shares an axis with the first tube portion 2611, is slidably disposed within the first tube portion 2611, and has a limiting mechanism (lever portion) 263 that contacts an end of the first hole 26112 to limit the movement of the first tube portion 2611 in the axis direction. The inner diameter of the second tube portion 262 is approximately the same as the outer diameter of the protrusion 265. When the limiting mechanism 263 is in contact with the end 261123 of the first hole 26112 facing the protrusion 265, the second cylindrical portion 262 is blocked by the protrusion 265. When the limiting mechanism 263 is in contact with the end 261124 of the first hole 26112 facing the opposite direction to the protrusion 265, the second cylindrical portion 262 moves away from the protrusion 265, and the second cylindrical portion 262 and the opening 2612 are connected. As a result, by applying pressure to the inside of the first cylindrical portion 2611, the second cylindrical portion 262 moves within the first cylindrical portion 2611 along the axial direction, and a valve formed by the second cylindrical portion 262 and the protrusion 265 opens and closes.

[0080] In the above embodiment, the valve 26 includes the float 264. The first tube portion 2611 is cylindrical, and the second hole 26113 is formed on the other side surface. The first hole 26112 has a width in the circumferential direction. The limiting mechanism 263 is connected to the float 264 as a lever portion. The second tube portion 262 is cylindrical, and when the float 264 moves in the circumferential direction of the first tube portion 2611 to rotate around the axis of the first tube portion 2611, and the lever portion 263 contacts the lower end 261121 of the first hole 26112 and also contacts the end portion 261123 of the first hole 26112 toward the protrusion portion 265, a third hole 2622 is formed at a position overlapping with the second hole 26113. As a result, float 264 moves in the circumferential direction of first tubular portion 2611, changing the position of third hole 2622 relative to first hole 26112. Therefore, when float 264 is in an appropriate position, third hole 2622 and first hole 26112 overlap, and water is supplied from the overlapping holes. On the other hand, when float 264 is not in an appropriate position, third hole 2622 and first hole 26112 no longer overlap, and water supply is stopped.

[0081] <Modification> In the above embodiment, the valve 26 supplies water between the wastewater adjustment tank 10 and the biological treatment tank 20. However, the object supplied by the valve 26 is not limited to water. The valve 26 may be used to supply other fluids or air. For example, the valve 26 may be used to supply ozone gas. However, in the supply of gas, the float 264 does not move up and down, so the valve 26 provides a valve opening and closing function based on the movement of the valve member 262 along the axial direction of the first cylindrical portion 2611 as shown in FIG. 15 and FIG. 16. For example, in FIG. 16, when a force is applied to suck the valve member 262 toward the first opening 26111, the valve member 262 moves toward the first opening 26111, and the valve is opened. On the other hand, in FIG. 16, when a force is applied to push the valve member 262 toward the first opening 26111, the valve member 262 moves toward the protrusion 265, and the valve is closed. The second hole portion 26113 and the fourth hole portion 2622 may be formed, and in that case, when the second hole portion 26113 and the fourth hole portion 2622 overlap with each other, an open state is established.

[0082] In the above embodiment, a case has been described in which water is supplied using the siphon principle by utilizing the difference in height between the wastewater adjustment tank 10 and the biological treatment tank 20. However, it is not necessary to use the siphon principle. For example, the tanks connected by the valve 26 may be provided at the same height. When water is supplied using the siphon principle, the pump is stopped when water supply begins. When the siphon principle is not used, for example, the control unit does not stop the pump and allows the pump to continue supplying water.

[0083] Although the preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the specific embodiment, and the present disclosure includes the invention described in the claims and its equivalents. In addition, the configurations of the devices described in the above embodiments and modifications can be partially omitted or combined as long as no technical contradiction occurs.

[0084] <Additional Notes> The matters described in the above embodiments will be supplemented below. (Appendix 1) a first cylindrical portion having a protrusion formed inward along an axis at one end, an opening formed on a side surface near the protrusion, and a first hole having a width in the axial direction formed on the other side surface; and a second cylindrical portion sharing an axis with the first cylindrical portion, being slidably disposed within the first cylindrical portion, and having a limiting mechanism that limits the axial movement of the first cylindrical portion by coming into contact with an end of the first hole, the second cylindrical portion having an inner diameter approximately the same as the outer diameter of the protrusion, wherein when the limiting mechanism is in contact with the end of the first hole facing the protrusion, the second cylindrical portion is blocked by the protrusion, and when the limiting mechanism is in contact with the end of the first hole facing away from the protrusion, the second cylindrical portion moves away from the protrusion, connecting the second cylindrical portion to the opening. (Appendix 2) The first cylindrical portion has a second hole formed on the other side, and the second cylindrical portion has a third hole formed at a position that overlaps with the second hole when the restriction mechanism is in contact with the end of the first hole facing the protrusion and is blocked by the protrusion (a valve described in Appendix 1). (Appendix 3) A valve as described in Appendix 1, which is provided with a float, the first tubular portion is cylindrical and has a second hole formed on the other side, the first hole having a width in the circumferential direction, the limiting mechanism being connected to the float as a lever portion, the second tubular portion being cylindrical, and the float moving in the circumferential direction of the first tubular portion causes it to rotate around the axis of the first tubular portion, and when the lever portion is in contact with the lower end of the first hole and in contact with the end of the first hole facing the protrusion portion, a third hole is formed at a position overlapping with the second hole. (Appendix 4) A water treatment module having a valve described in any one of (Appendix 1) to (Appendix 3) between tanks. (Appendix 5) A water treatment device having a valve according to any one of (Appendix 1) to (Appendix 3) between tanks. (Appendix 6) A valve comprising: a float; a lever part connected to the float; a first cylindrical part having a first hole on its side and a second hole that limits the movement of the lever part; and a second cylindrical part that shares an axis with the first cylindrical part and is slidably disposed within the first cylindrical part so that a portion of the second cylindrical part is visible through the second hole, the lever part is connected to the region, and the float moves circumferentially around the first cylindrical part, causing the second cylindrical part to rotate around the axis, and when the lever part is in contact with the lower end of the second hole, a third hole is formed at a position that overlaps with the first hole. (Appendix 7) The first cylindrical portion has a protrusion formed inward along the axis and having an outer diameter approximately the same as the inner diameter of the second cylindrical portion, the second cylindrical portion is movable in the axial direction within the first cylindrical portion, and when the lever portion is in contact with an end of the second hole facing the protrusion, the protrusion fits within the second cylindrical portion, and the axial position of the first hole and the axial position of the third hole approximately coincide, and when the lever portion is in contact with the end of the second hole facing away from the protrusion, the protrusion moves away from the second cylindrical portion, and the axial position of the first hole and the axial position of the third hole do not coincide (Appendix 6). [Explanation of symbols]

[0085] 1...Circulating wastewater treatment unit 10…Drainage adjustment tank 20...Biological treatment tank 26…Valve 30…Treated water storage tank 40…Ozone generator 50…Exhaust pipe 90…Supply section 100...Circulating toilet

Claims

1. a first cylindrical portion having a protrusion formed inward along an axis at one end, an opening formed on a side surface near the protrusion, and a first hole having a width in the axial direction formed on another side surface; a second cylindrical portion that shares an axis with the first cylindrical portion, is slidably disposed within the first cylindrical portion, and has a limiting mechanism that limits movement of the first cylindrical portion in the axial direction by contacting an end of the first hole, and has an inner diameter that is approximately the same as the outer diameter of the protrusion; Equipped with When the limiting mechanism is in contact with an end of the first hole in a direction toward the protrusion, the second cylindrical portion is blocked by the protrusion, A valve in which, when the restriction mechanism is in contact with the end of the first hole opposite the protrusion, the second cylindrical portion moves away from the protrusion, connecting the second cylindrical portion to the opening.

2. The first cylindrical portion has a second hole formed in another side surface thereof, 2. The valve according to claim 1, wherein the second cylindrical portion has a third hole formed at a position overlapping with the second hole when the restriction mechanism is in contact with an end of the first hole toward the protrusion and is blocked by the protrusion.

3. Equipped with floats, The first tube portion is a cylinder, and a second hole is formed in the other side surface of the first tube portion. The first hole has a width in a circumferential direction, The limiting mechanism is connected to the float as a lever portion, 2. The valve according to claim 1, wherein the second tubular portion is a cylinder, and when the float moves in a circumferential direction of the first tubular portion to rotate around the axis of the first tubular portion, and the lever portion contacts a lower end of the first hole and also contacts an end of the first hole toward the protrusion portion, a third hole is formed at a position overlapping with the second hole.

4. A water treatment module having the valve according to any one of claims 1 to 3 between tanks.

5. A water treatment device comprising the valve according to any one of claims 1 to 3 between tanks.

6. Float and A lever portion connected to the float; a first cylindrical portion having a first hole on a side surface and a second hole that serves as a movement limit for the lever portion; a second cylindrical portion that shares an axis with the first cylindrical portion, is slidably disposed within the first cylindrical portion such that a portion of the second cylindrical portion is exposed from the second hole, the lever portion is connected to the portion, the float moves in a circumferential direction of the first cylindrical portion to rotate about the axis, and a third hole is formed at a position that overlaps with the first hole when the lever portion is in contact with a lower end of the second hole; A valve comprising:

7. the first cylindrical portion has a protrusion portion formed inward along the axis and having an outer diameter substantially the same as an inner diameter of the second cylindrical portion, The second cylindrical portion is The first cylindrical portion is movable in the axial direction, when the lever portion is in contact with an end portion of the second hole in a direction toward the protrusion portion, the protrusion portion is accommodated within the second cylindrical portion, and an axial position of the first hole and an axial position of the third hole are substantially aligned with each other; 7. The valve according to claim 6, wherein when the lever portion is in contact with the end of the second hole opposite the protrusion portion, the protrusion portion moves away from the second cylindrical portion, and the axial position of the first hole does not coincide with the axial position of the third hole.

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