WO2019221271A1

WO2019221271A1 - Water discharge system

Info

Publication number: WO2019221271A1
Application number: PCT/JP2019/019667
Authority: WO
Inventors: 前田　康成; 紗季帆麻; 尚紀柴田
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2018-05-18
Filing date: 2019-05-17
Publication date: 2019-11-21

Abstract

A water discharge system 10 has a lateral conduit 11 into which dirty water from urinals 1 flows, the dirty water being discharged into a water discharge unit 9 provided to a building. A circulation path 13 is formed from the lateral conduit 11 and a return flow path 12 that branches from the bottom flow area of the lateral conduit 11 and is connected to the upper flow area of the lateral conduit 11, and a circulation pump 16 is arranged in the circulation path 13.

Description

Drainage system

The present invention relates to a drainage system attached to a urinal.

Sewage flowing down from a plurality of urinals on any floor in a building such as a building is discharged to a vertical drain pipe provided in the building through a horizontal pulling pipe provided below the urinal. . Since the horizontal pulling pipe is a horizontal pipe, the flow of water may be deteriorated and the water may stay, so that urine remaining in the pipe may be accumulated as urine stone.

In order to remove urinary stones accumulated in the tube in this way and to prevent adhesion of dirt such as urinary stones in the tube, flush water containing a drug or a large amount of water is poured into the horizontal conduit. A method of flowing wash water has been proposed. For example, Patent Document 1 proposes to periodically increase the flow rate of cleaning water.

JP 2013-155523 A

However, the conventional method requires a chemical and a lot of washing water, which may increase the operating cost.

The present invention has been proposed in view of such circumstances, and an object of the present invention is to provide a drainage system that can efficiently suppress adhesion of urinary stones and dirt in a horizontal pulling conduit.

In order to achieve the above object, the drainage system of the present invention is a drainage system having a horizontal pulling conduit for discharging sewage from a urinal and discharging the sewage to a drainage part provided in a building, A circulation path is formed by the horizontal pulling pipe and a return flow path branched from the downstream area of the horizontal pulling pipe and connected to the upstream area of the horizontal pulling pipe, and a circulation pump is provided in the circulation path. It is arranged.

Since the drainage system of the present invention has the above-described configuration, it is possible to efficiently suppress adhesion of urine stones and dirt in the horizontal pulling conduit.

1 is a schematic system diagram of a drainage system according to a first embodiment of the present invention. It is a general | schematic expanded longitudinal cross-sectional view which abbreviate | omitted one part which shows an example of the washing | cleaning in the horizontal draw pipe line in the drainage system. It is a time chart which shows the circulation timing of the drainage system. It is a schematic system diagram of a drainage system concerning a 2nd embodiment of the present invention. It is a general | schematic expanded longitudinal cross-sectional view which abbreviate | omitted one part which shows an example of the washing | cleaning in the horizontal draw pipe line in the drainage system. It is a time chart which shows the circulation timing of the drainage system.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, a schematic basic configuration of the drainage system 10 will be described.

As shown in FIG. 1 (first embodiment) and FIG. 4 (second embodiment), the drainage system 10 has a drainage unit (this embodiment) in which sewage from the urinal 1 flows and the sewage is provided in a building. In the form, it is a drainage system having a horizontal pulling pipe 11 for discharging to a vertical drainage pipe 9). In this drainage system 10, a circulation path 13 is formed by a horizontal pulling pipe 11 and a return flow path 12 branched from a downstream area of the horizontal pulling pipe 11 and connected to an upstream area of the horizontal pulling pipe 11. A circulation pump 16 is disposed in the circulation path 13.

The drainage system 10 is a system related to a drainage mechanism provided in common to the urinals 1 on the downstream side of the plurality of urinals 1. In the present embodiment, as described above, the drainage system 10 includes the circulation path 13 disposed on the downstream side of the urinal 1 as a main component, but the urinal 1 and other parts It may be configured to include a certain water supply path 2, branch path 3, discharge path 5 and the like.

Hereinafter, the urinal 1, its peripheral mechanism, and the drainage system 10 will be described in detail with reference to FIGS. 1 to 3 illustrated for the first embodiment and FIGS. 4 to 6 illustrated for the second embodiment. In these embodiments, an example of an arbitrary floor in the case where the drainage system 10 is provided on each floor of a building or the like is shown. As shown in FIGS. 1 and 4, all the urinals 1 are discharged. The sewage to be discharged is discharged to a drainage portion composed of a vertical drainage pipe 9 communicating with the top and bottom. 1 and 4 schematically show the flow of water with arrows.

Note that the second embodiment is different from the first embodiment in that it further includes a bubble mixing portion 18 as shown in FIG. 4, and other configurations are generally the same. Hereinafter, items common to the two embodiments will be described together, and items related to the bubble mixing unit 18 will be described as differences from time to time.

As shown in FIGS. 1 and 4, the urinal 1 is connected to the water supply path 2 via the individual branch paths 3 so that the wash water is supplied to the plurality of toilets through the common water supply path 2. Further, the urinal 1 is connected to the horizontal pulling conduits 11 via the individual discharge passages 5 so as to discharge the sewage (urine and washing water) to the horizontal pulling conduits 11 common to a plurality of toilets. The horizontal pulling pipe 11 is inclined downward toward the downstream, and is drained to the vertical drain pipe 9 as long as sewage is not circulated.

The urinal 1 includes a bowl portion 1 a, a water supply portion 1 b connected to the branch passage 3, and a discharge portion 1 c connected to the discharge passage 5. This water supply part 1b is provided with discharge parts, such as a spreader, which discharges the wash water sent from the water supply path 2 via the branch path 3 so as to be along the inner surface of the bowl part 1a. Moreover, the discharge part 1c comprises a trap part, and is set as the structure which flows out sewage into the discharge path 5. FIG.

In addition, a water supply valve 4 is disposed in the branch path 3, and water can be supplied to the bowl portion 1 a of the urinal 1 by opening the water supply valve 4 for each individual urinal 1 by a cleaning operation or by a sensor operation. It is like that.

The discharge passage 5 provided for each of the urinals 1 is connected to the horizontal pulling conduit 11 as described above, and the horizontal pulling conduit 11 is connected to the drainage portion including the vertical drainage pipe 9 on the downstream side. ing. Therefore, the sewage (urine and washing water) discharged from the urinal 1 is discharged to the vertical drain pipe 9. The drainage unit may be a drainage basin.

The drainage system 10 is a circulation system including the horizontal pulling pipe 11. Specifically, as described above, the operation is performed in the circulation path 13 that branches from the downstream area of the horizontal pulling pipe 11 to the return flow path 12 and that the return flow path 12 is connected to the upstream area of the horizontal pulling pipe 11. System. In addition, the upstream area and the downstream area of the horizontal pulling pipeline 11 are the upper and lower relationships in the flow of water and are relative. As in the example of FIG. 1, the branching portion 11 a connected to the return flow path 12 in the downstream area of the horizontal pulling pipe 11 is preferably downstream from the position where the most downstream discharge path 5 is connected. . Further, it is desirable that the return portion 11b connected to the return flow path 12 in the upstream region of the horizontal pulling conduit 11 is upstream from the position where the most upstream discharge path 5 is connected.

A pump 16 is arranged in such a circulation path 13, and the sewage in the horizontal pulling pipe 11 is drawn to the return flow path 12 through the branch part 11 a by the pump 16, and further, the horizontal pulling pipe is set via the return part 11 b. It returns to the upstream area of the road 11. In the illustrated example, the pump 16 is disposed in the return portion 11b, but is not limited thereto. Further, a check valve 15 is arranged in the horizontal pulling conduit 11 so as not to flow backward.

The branch part 11a between the downstream area of the horizontal pulling pipe 11 and the return flow path 12 connects the return flow path 12 to the lower surface of the horizontal pulling pipe 11 so that the inside of the return flow path 12 of the connected portion is It is connected so that sewage falls downward. Therefore, if there is a gap in the return flow path 12 of the connected part where the pump 16 is activated, the sewage falls and circulates in the circulation path 13, and the pump 16 stops and is connected. When dirty water is accumulated in the partial return flow path 12, it is discharged to the vertical drain pipe 9. In this way, when the pump 16 is in operation, the sewage circulates in the circulation path 13, but when the pump 16 is not in operation, the sewage does not flow through the lower return flow path 12 and moves in the horizontal direction to the vertical drain pipe 9. It flows to. In addition, you may provide a switching valve in the branch part 11a so that switching in the circulation path 13 and discharge | emission to the vertical drain pipe 9 can be switched.

Furthermore, as shown in FIGS. 1 and 4, it is desirable to provide a filtration device 14 (filter) in the middle of the return flow path 12. During the sewage circulation, there is a risk that sewage containing foreign matter and solid matter such as body hair removed from the horizontal pulling conduit 11 may flow into the return channel 12, but these can be removed by the filtration device 14. .

In addition, the presence or absence of sewage is detected on the upstream side of the branching portion 11a in the horizontal pulling pipeline 11 and on the downstream side of the position where the discharge channel 5 on the most downstream side (right side in FIGS. 1 and 4) is connected. A flow meter 17 is provided. The flow meter 17 is for detecting a circulation start condition, and details thereof will be described later together with the description of FIGS. 3 and 6.

In the second embodiment, as shown in FIG. 4, the circulation path 13 further includes a bubble mixing portion 18 (abbreviated as “MB” in the drawing) at a position near the pump 16 on the downstream side of the pump 16. ing. In the example of FIG. 4, the arrangement position of the bubble mixing part 18 is the return part 11b.

The bubble mixing portion 18 may be configured to mix both the millimeter order and the micrometer order or one of the fine bubbles. In addition, the bubble mixing portion 18 has a void ratio (area ratio of bubbles included per unit cross-sectional area of the fluid) of about 5% to 40%, preferably about 5% to 40% of sewage mixed with fine bubbles (fine bubble-containing sewage). It may be set to be about 10% to 30%.

It is preferable to use a type that generates fine bubbles using the water pressure by the pump 16 as the bubble mixing part 18. For example, a constricted portion and an enlarged diameter portion are continuously provided in the sewage flow path, and air is sucked and mixed by the negative pressure generated at the throttle portion, and then the mixed bubbles are refined by the shearing force generated at the expanded diameter portion. For example, refer to FIG. 4 in JP 2009-155844 A. In the present embodiment, the bubble mixing portion 18 is one that generates bubbles due to the venturi effect as described above, and the bubble mixing portion 18 is arranged immediately downstream of the pump 16 as shown in FIG. .

Next, the flow of circulating water in the horizontal pulling pipe 11 will be described with reference to FIGS. 2 and 5. The sewage drawn from the return flow path 12 by the pump 16 is configured to be sent obliquely forward along the inner surface of the pipe with respect to the horizontal pulling pipe line 11. By such delivery, the circulating water discharged from the pump 16 flows spirally in the horizontal pulling conduit 11. If the pump 16 is adjusted to flow spirally over almost the entire length of the pipe, the entire surface of the pipe can be efficiently cleaned. In the second embodiment, the sewage drawn from the return flow path 12 by the pump 16 is sent out together with the fine bubbles from the bubble mixing part 18 (see FIG. 5).

According to the drainage system 10 described above, the horizontal pulling pipe 11 can be repeatedly washed with the sewage by circulating the sewage. If the circulation path 13 does not exist and water does not circulate in the horizontal pulling pipe 11, urine adheres to and concentrates on the inner surface of the pipe such as body hair remaining in the horizontal pulling pipe 11, As a result, urine stones may adhere to the inner surface of the tube. However, if the horizontal pipe line 11 is incorporated in the circulation path 13 like these drainage systems 10, the inside of the pipe is washed by passing through the horizontal pipe line 11 many times, or urine is washed. Concentration of urine is hindered and urine stones are less likely to be generated. Moreover, even when urine stones are generated, since the sewage is not retained, it can be prevented from adhering to the inner surface of the tube.

Therefore, according to these drainage systems 10, the circulation of the sewage contributes to the prevention of the occurrence of dirt in the horizontal pulling pipeline 11, the aging deterioration of the horizontal pulling pipeline 11 can be delayed, and the frequency of maintenance is reduced. You can also

Moreover, since sewage is circulated through the horizontal pulling conduit 11, a water-saving cleaning system that can efficiently clean the horizontal pulling conduit 11 without using a large amount of clean cleaning water can be configured. .

Furthermore, according to the drainage system 10 according to the second embodiment, since the bubble mixing part 18 is provided in the circulation path 13, urine stones or the like adhering in the horizontal pulling pipe line 11 with sewage mixed with fine bubbles. It is also possible to remove various stains. The fine bubbles generated in the bubble mixing unit 18 collide with the inner surface of the horizontal pulling pipe 11 and burst, thereby peeling off the dirt adhering to the inner surface. Furthermore, it is possible to prevent the urinary stones from adhering by peeling off the dirt adhering to the inner surface of the horizontal pulling duct 11 by the ultrasonic waves generated when the fine bubbles collapse.

Furthermore, as shown in FIG. 4, since the bubble mixing part 18 is arranged downstream of the filtering device 14, the bubbles are not destroyed by the filtering device 14, and the sewage containing bubbles is laterally drawn. It can flow from the upstream area of the path 11. In particular, as shown in FIG. 4, if a bubble mixing part 18 is provided in the return part 11 b that is a part of the horizontal pulling pipe 11, strong water-filled bubbled sewage flows from the upstream area of the horizontal pulling pipe 11. And can strongly remove dirt. In addition, in order to prevent air entrainment due to insufficient water supply in the bubble mixing part 18, clean wash water from the water supply path 2 is directly supplied to the sewage in the circulation path 13 through the bypass path (see the flow of the broken arrow in FIG. 4). It is good also as composition to do.

In the drainage system 10 shown above, sewage circulates by the above-described configuration, and the circulation control is performed by the control unit 20 (see FIG. 1). This will be described with reference to the time charts of FIGS.

First, the control unit 20 determines that the cleaning water has been supplied to any of the urinals 1 by opening the water supply valve 4 (or a cleaning operation) or the like (A in FIG. 3 and A in FIG. 6). .

Thereafter, when the sewage flows to the downstream area of the horizontal pulling pipe 11 and a predetermined flow rate is detected by the flow meter 17 and it is determined that there is an amount of water, the control unit 20 activates the pump 16 at that timing, The circulation of the sewage is started (B in FIG. 3 and B in FIG. 6). After the circulation is started, the amount of drainage to the vertical drain pipe 9 is reduced or the drainage is stopped. In the second embodiment, mixing of bubbles starts almost at the same timing as the start of circulation (B ′ in FIG. 6).

Thereafter, when the water supply to the urinal 1 is stopped (C in FIG. 3 and C in FIG. 6), the control unit 20 stops the circulation by stopping the pump 16 after a predetermined time T has elapsed from that point (FIG. 3). D, D of FIG. After the circulation is stopped, the sewage flowing through the horizontal pulling pipe 11 flows into the return flow path 12 or flows out to the vertical drain pipe 9, and if most of the sewage is discharged from the horizontal pulling pipe 11, the flow rate The total amount of water is 17 (E in FIG. 3 and E in FIG. 6). In addition, since the bubble mixing unit 18 of the second embodiment is configured so that the bubble mixing is linked to the operation of the pump 16, the bubble mixing is also stopped by the circulation stop (D ′ in FIG. 6).

As described above, every time the urinal 1 is used and supplied with water under the control of the control unit 20, the drainage system 10 may be operated to circulate sewage in the circulation path 13. In addition, if the circulation time is lengthened, the inside of the horizontal pulling conduit 11 can be cleaned for a long time, and the cleaning action can be improved. That is, in such a time chart example, the predetermined time T may be lengthened and the circulation time may be lengthened. In addition, it is not restricted to the structure which stops a circulation by time delay in this way, It is good also as an operation | movement structure which stops a circulation by the stop of the water supply to the urinal 1 (C of FIG. 3, C of FIG. 6).

Also, the drainage system 10 may be operated regardless of the timing of water supply to the urinal 1 and the detected value of the flow meter 17. For example, a timer may be provided so that the circulation operation is performed at a constant cycle or a predetermined time. The stop timing may be a certain time after the start.

Further, for example, the cleaning water may be directly supplied from the water supply channel 2 to the horizontal pulling channel 11 at a constant cycle, and the cleaning water may be circulated through the circulation channel 13 for a predetermined time. That is, the circulation (drive of the pump 16) may be started with the amount of water by the flow meter 17 and stopped after a certain time. In this case, the washing water may be supplied to the horizontal pulling conduit 11 by a bypass passage (refer to the flow of the broken arrow in FIG. 4).

In this way, cleaning water dedicated to circulation is required. However, in the case of the urinal 1 that is not frequently used, it is possible to circulate the water before urine stones and dirt adhere, This is effective for increasing the cleaning effect in the pulling conduit 11. In this case, the dedicated washing water for circulation can suppress the adhesion of urine stones with a smaller amount of water than the amount of washing water required by the method disclosed in Patent Document 1.

In the above embodiment, the flow meter 17 is disposed in the circulation path 13, but may be disposed in the vicinity of the connection portion of the vertical drain pipe 9 on the downstream side of the circulation path 13. Even in such a case, the presence of water by the flow meter 17 can be used as the circulation start condition.

If the flow meter 17 is arranged in the circulation path 13 as shown in FIGS. 1 and 4, the amount of water can be monitored during circulation, and the pump 16 can be stopped when no water amount is detected. That is, the presence of water by the flow meter 17 can be used not only as a circulation start condition but also as an operation condition. In this way, the circulation can be stopped when the sewage in the circulation path 13 flows out of the circulation path 13 for some reason despite the fact that it is being circulated (the pump 16 is operating). Instead of using the flow meter 17, the pump 16 may be operated or constantly circulated in cooperation with the timing of water supply to the urinal 1.

Further, the sewage in the circulation path 13 may be cleaned by the filtering device 14 or other cleaning device. The purified water may be reused as washing water for the urinal 1 by branching at the downstream portion of the pump 16 and connecting it to the water supply channel 2 (see the flow of the broken arrow in FIG. 1). ).

Further, an electrode may be provided in the return flow path 12 to generate ozone by electrolyzing the flowing water, and the water in which the ozone is dissolved may be circulated in the circulation path 13. By doing in this way, it can prevent more reliably that a urine stone adheres to the circulation path 13.

1 Urinal 9 Vertical drainage pipe (drainage section)
DESCRIPTION OF SYMBOLS 10 Drainage system 11 Horizontal draw pipe 12 Return flow path 13 Circulation path 14 Filtration apparatus 16 Pump 18 Bubble mixing part

Claims

A drainage system having a horizontal conduit that discharges sewage from a urinal and discharges the sewage to a drainage section provided in the building,
A circulation path is formed by the horizontal pulling pipe and a return flow path branched from the downstream area of the horizontal pulling pipe and connected to the upstream area of the horizontal pulling pipe, and a circulation pump is provided in the circulation path. Drainage system characterized by that is arranged.
In claim 1,
The drainage system according to claim 1, further comprising: a bubble mixing unit that bubbles air into the sewage and mixes the circulated water.
In claim 1 or 2,
A drainage system, wherein a filtration device is arranged in the return flow path.
In claim 3,
The drainage system, wherein the bubble mixing part is disposed on the downstream side of the filtration device in the return flow path.
In any one of claims 1 to 4,
The drainage system, wherein the circulating water discharged from the pump flows spirally in the horizontal pulling pipe.