JP5604169B2 - Siphon drainage system - Google Patents

Description

  The present invention relates to a siphon drainage system that drains using siphon force.

In recent years, siphon drainage systems have been proposed in place of conventional gradient drainage systems. The siphon drainage system includes a watering device and a siphon drainage pipe.
The siphon drain pipe is composed of a horizontal pull pipe that is piped along the floor slab with no gradient, and a vertical pipe that forms a hanging part. According to the siphon drainage system configured as described above, it is possible to improve drainage efficiency from the watering device by using siphon force (negative pressure) generated in the soot pipe.

By the way, what determines the performance in the siphon drainage system includes the amount of drainage and the siphon activation time.
The amount of wastewater treated is the value of how many liters of water can be drained per second when the siphon force is activated. Mainly, the length of the vertical pipe connecting the watering device and the horizontal pipe, and the length of the horizontal pipe It depends on.
If the amount of wastewater is small, it takes a long time to drain when washing. Even in the case of sinking, if the amount of wastewater treated is too small, water will overflow from the drainage outlet of the watering device if the amount treated is lower than the amount of water from the faucet.

  On the other hand, the siphon activation time is the time from the start of drainage until the siphon force is activated. When the siphon force is activated, the flow rate is increased at once, and a sufficient processing amount is obtained. However, before the siphon force is activated, the processing amount is extremely small. For this reason, water may overflow from the drain outlet of the watering device before the siphon force after the drainage starts.

On the other hand, the siphon drainage system disclosed by patent document 1 is proposed for the purpose of advancing siphon starting time.
The siphon drainage system disclosed in Patent Document 1 is a system in which a function for escaping air during positive pressure in a horizontal pulling pipe is added to a position immediately before the horizontal pulling pipe is suspended.

JP 2006-336321 A

In addition to accelerating the siphon activation time, stagnation of drainage in the vicinity of the drain outlet of the watering device is a problem immediately after drainage is started or during drainage.
The cause of this is that the air in the drain pipe has no escape, so that it becomes a resistance and the drainage does not flow smoothly into the drain pipe.

Higher drainage water appliances (kitchens, etc.) are less likely to cause water overflow from the drainage outlets of the water drainage appliances due to their structure compared to lower drainage water appliances (unit baths, washing machines, etc.). For this reason, it is necessary to increase the siphon activation time in a high-level drainage water supply device (such as a kitchen), but in particular, the stagnation of wastewater near the drainage port of the water supply device is a problem.
In view of the above facts, an object of the present invention is to provide a siphon drainage system capable of suppressing stagnation of drainage generated near the drainage port of a watering device.

A siphon drainage system according to claim 1 of the present invention extends downward from a watering device, and extends in a lateral direction in communication with the drainage introduction tube for flowing the wastewater from the watering device downward, A horizontal pipe that flows the drainage from the drainage introduction pipe in a lateral direction, a vertical pipe that communicates with the lateral pulling pipe and extends downward, and generates siphon force by flowing down the drainage from the horizontal pulling pipe; A sealed air chamber that communicates with the drainage introduction pipe above the siphon activation reference head, allows the air in the drainage introduction pipe pressed by the drainage from the watering device to flow in, and can be expanded and contracted. .

  According to this configuration, the drainage from the water-surrounding device flows downward in the drainage introduction pipe. The drainage that has flowed downward in the drainage introduction pipe further flows laterally in the horizontal pulling pipe. Next, the drainage flows down the vertical pipe and siphon force is generated. The siphon force induces drainage in the drainage introduction pipe, the horizontal pulling pipe, and the vertical pipe, and promotes the drainage.

Here, in the configuration of claim 1, even when the air in the drainage introduction pipe is difficult to be discharged to the downstream side due to drainage accumulated at the downstream end or the like in the drainage introduction pipe, When the air flows through the drainage introduction pipe, the air in the drainage introduction pipe pressed by the drainage escapes into the air chamber, so that the drainage smoothly flows through the drainage introduction pipe. Thereby, the stay of the waste_water | drain near the drain outlet of a watering device can be suppressed.
The siphon drainage system according to a second aspect of the present invention is characterized in that, in the configuration of the first aspect, an indoor volume at the time of maximum expansion of the air chamber is 50% to 400% of a volume in the drainage introduction pipe. And
If the indoor volume at the time of maximum expansion of the air chamber is 50% or more of the volume in the drainage pipe, the pulsation interval can be shortened if the siphon start time can be shortened efficiently, and the vicinity of the drainage port of the watering device Can be effectively suppressed. In addition, if the indoor volume at the time of maximum expansion of the air chamber is about 400% of the volume in the drainage introduction pipe, the air chamber does not become full and there is little need to increase the volume of the air chamber. In order to achieve a compact design, it is preferable to set it to 400% or less.

In the siphon drainage system according to claim 1 of the present invention, the air chamber communicates with the drainage introduction pipe above the siphon activation reference head.
Here, the siphon activation reference head is the water level in the drainage pipe (drainage introduction pipe, horizontal pulling pipe and dredging pipe) necessary for generating siphon force, and above the siphon activation reference head. Since the air chamber communicates with the drainage introduction pipe, the wastewater hardly flows into the air chamber from the drainage introduction pipe.

The siphon drainage system according to a third aspect of the present invention is the siphon drainage system according to the third aspect, wherein the drainage introduction pipe and one end communicate with each other above the siphon activation reference head, and the other end extends upward. A communication pipe communicating with the air chamber is provided.
According to this configuration, the drainage pipe that communicates with the drainage introduction pipe and one end above the siphon activation reference head is connected to the air chamber at the other end that extends upward. Drainage is more difficult to flow in from.

The siphon drainage system according to a fourth aspect of the present invention is the siphon drainage system according to the third aspect , wherein one end of the communication pipe communicates with a lower portion of the drainage introduction pipe and the other end extends upward.
According to this configuration, since one end portion communicates with the lower portion of the drainage introduction pipe, a space that allows the other end portion to extend longer than the case where one end portion communicates with the upper portion of the drainage introduction pipe is ensured. it can.
The siphon drainage system according to a fifth aspect of the present invention is the siphon drainage system according to any one of the first to fourth aspects, wherein the communication pipe extends obliquely upward from the one end portion and the other end portion is in the vertical direction. The air chamber extends in communication with the air chamber.
According to this configuration, since the other end of the communication pipe extends in the vertical direction and communicates with the air chamber, even when drainage enters the air chamber, the communication pipe falls into the communication pipe without staying in the air chamber. Can be made.

A siphon drainage system according to a sixth aspect of the present invention is the siphon drainage system according to any one of the first to fifth aspects, wherein the air from the outside is passed through the drainage introduction pipe and drained from the drainage introduction pipe to the outside. Ventilation valve that does not pass through.
According to the configuration of the present invention, when the siphon force acts and air is pulled downstream along with the drainage in the drainage introduction pipe, the air escaped into the air chamber flows into the drainage introduction pipe. Even when the air in the drainage introduction pipe is pulled downstream after the air is exhausted, the air flows in from the vent valve, so that the inside of the drainage introduction pipe is less likely to become negative pressure.
Thereby, problems caused by the negative pressure in the drainage introduction pipe, for example, noise generated by sucking air in a water-sealed drain trap of a watering device, breakage of the drain trap, and the like can be solved.

The siphon drainage system according to claim 7 of the present invention is the siphon drainage system according to claim 6 , wherein the inflow resistance of the air flowing from the air chamber to the drainage introduction pipe side flows from the vent valve to the drainage introduction pipe side. It is smaller than the inflow resistance of air.
According to this configuration, the inflow resistance of air flowing from the air chamber to the drainage introduction pipe side is smaller than the inflow resistance of air flowing from the vent valve to the drainage introduction pipe side. That is, air is more likely to flow into the drainage introduction pipe from the air chamber than from the vent valve.
For this reason, when siphon force acts and air is pulled with the drainage in the drainage introduction pipe to the downstream side, the air escaped into the air chamber first flows into the drainage introduction pipe, and then the air flows in from the vent valve. As a result, the interior of the air chamber is reduced and returned to its original state, so that even if the water is drained from the watering device after that, the air in the drainage introduction pipe pressed by the drainage can escape to the air chamber. Thus, even when drainage is repeated, it is possible to suppress stagnation of drainage near the drainage port of the watering device.

The siphon drainage system according to an eighth aspect of the present invention is the siphon drainage system according to the sixth or seventh aspect , wherein the vent valve is provided at the drainage port of the watering device and is formed in a cylindrical shape by an elastic material, It is a self-sealing drain trap that is always open on the side, openable on the downstream side, and closed in the free state.
According to this configuration, since the ventilation valve and the drain trap are shared, the number of parts can be reduced.

A siphon drainage system according to a ninth aspect of the present invention is the configuration according to any one of the first to eighth aspects, wherein the air chamber is formed inside and includes a bag-shaped bag member formed of a film body.
According to this configuration, since the air chamber is formed inside the bag-shaped bag member formed of the film body, the air chamber can be formed in a small space with a simple configuration.

In the siphon drainage system according to claim 10 of the present invention, in the configuration of any one of claims 1 to 9 , the watering device pulverizes the input material introduced into the outlet of the watering device, A disposer is provided that allows the pulverized material to flow down along with the drainage.
According to this configuration, since the wastewater flows together with the pulverized material, the pulverized material and the wastewater are likely to remain at the downstream end portion in the drainage introduction pipe, and the air in the drainage introduction pipe is unlikely to be discharged downstream. . On the other hand, in the configuration of the present invention, when the drainage from the watering device flows through the drainage introduction pipe, the air in the drainage introduction pipe pressed against the drainage escapes into the air chamber, so that the drainage smoothly drains. An introduction pipe can be flowed. For this reason, also in the structure which provided the disposer, the retention of the waste_water | drain near the drain outlet of a watering device can be suppressed.

  Since this invention was set as the said structure, the retention of the waste_water | drain produced near the drain outlet of a watering device can be suppressed.

FIG. 1 is a schematic diagram showing the overall configuration of the siphon drainage system according to the present embodiment. FIG. 2 is a partially enlarged view in which the configuration of the siphon drainage system according to the present embodiment is partially enlarged. FIG. 3 is a schematic view showing a modification in which a disposer is provided in a watering device. FIG. 4 is a schematic diagram showing a configuration in which a bellows-like member having a bellows-like side wall is used as a forming member that forms an air chamber. FIG. 5 is a schematic view showing a state in which the bellows-like member shown in FIG. 4 is extended. FIG. 6 is a schematic view showing a modification in which the downstream end of the communication pipe is disposed above the watering device. FIG. 7 is a schematic view showing a modification in which the communication pipe extends obliquely upward from the drain introduction pipe. FIG. 8 is a schematic view showing a modification in which the communication pipe extends in the horizontal direction from the drainage introduction pipe. FIG. 9 is a schematic view showing another modification example in which the communication pipe extends obliquely upward from the drain introduction pipe. FIG. 10 is a schematic view showing a modified example in which the vent valve is arranged in the communication pipe. FIG. 11 is a schematic view showing a modification using a self-sealing drain trap as a vent valve. FIG. 12 is a schematic view showing a configuration of a self-sealing drain trap. FIG. 13 is a cross-sectional view showing a configuration of a self-sealing drain trap. FIG. 14 is a schematic view showing a state in which waste water stays at the upstream end of the R pipe and the horizontal pipe of the drain introduction pipe. FIG. 15 is a schematic view showing a state in which drainage is started from a watering device. FIG. 16 is a schematic view showing a state where the air in the drainage introduction pipe flows into the air chamber. FIG. 17 is a schematic view showing a state in which the drainage that has flowed through the drainage introduction pipe flows through the horizontal pulling pipe and then down the dredging pipe, and siphon force begins to act. FIG. 18 is a schematic view showing a state in which air in the air chamber flows into the drainage introduction pipe. FIG. 19 is a schematic view showing a state where air flows into the drainage introduction pipe through the vent valve. FIG. 20 is a view showing the pressure fluctuation in the drainage introduction pipe when the flushing equipment is washed, the change in the state of the bag member accompanying the pressure fluctuation and the ventilation state of the vent valve. FIG. 21 shows a configuration in which a communication pipe 33 for communicating the ventilation valve and the drainage introduction pipe is provided separately from the communication pipe 30 for communicating the air chamber and the drainage introduction pipe. It is the schematic which shows the structure connected to the waste_water | drain introduction pipe | tube in a high position. FIG. 22 shows a configuration in which a communication pipe 33 for communicating the ventilation valve and the drainage introduction pipe is provided separately from the communication pipe 30 for communicating the air chamber and the drainage introduction pipe. It is the schematic which shows the structure connected to the waste_water | drain introduction pipe | tube in the low position. FIG. 23 has a connecting pipe connected to the upstream side of the horizontal pipe, and a vent valve is provided in the drain introducing pipe in a configuration in which the downstream side of the R pipe of the drain introducing pipe is connected to the intermediate part of the connecting pipe. It is the schematic which shows the structure comprised. FIG. 24 has a connecting pipe connected to the upstream side of the horizontal pulling pipe, and in the configuration in which the downstream side of the R pipe of the drainage introduction pipe is connected to the middle part of the connecting pipe, a vent valve is provided in the connecting pipe. FIG.

Below, an example of an embodiment concerning the present invention is described based on a drawing.
(Configuration of siphon drainage system according to this embodiment)
First, the configuration of the siphon drainage system according to the present embodiment will be described. FIG. 1 is a schematic diagram showing the overall configuration of the siphon drainage system according to the present embodiment.

  A siphon drainage system 10 according to the present embodiment is a drainage system that efficiently drains drainage from a watering device using siphon force. In the present embodiment, an example in which the siphon drainage system is used in an apartment house composed of a plurality of floors will be described. The siphon drainage system is preferably used for an apartment house, but can also be used for a detached house or a factory other than the apartment house.

As shown in FIG. 1, the siphon drainage system 10 according to the present embodiment includes a drainage stack 12 that allows drainage to flow downward. The drainage stack 12 extends in the vertical direction (longitudinal direction) of the apartment house, and penetrates the floor slab 14 on each floor of the apartment house.
A watering device 16 for draining water is provided at each house on each floor of the apartment house. The watering device 16 is composed of, for example, a kitchen sink. The watering device 16 may be configured with any of a wash basin, a washing machine, a unit bath, a toilet, and the like.

  As shown in FIGS. 1 and 2, the watering device 16 is provided with a drain trap 17 for preventing the backflow of odor or gas. The drain trap 17 is a so-called trap trap. An eye plate 19 is provided at the drain outlet 16A portion of the watering device 16. In the present embodiment, a dredging trap is used as the drain trap 17, but another trap such as an S trap or a P trap may be used as the drain trap 17.

Further, as shown in FIG. 3, the watering device 16 disperses the input material such as raw garbage introduced into the discharge port 16A of the watering device 16 and enables the pulverized material to flow down together with the drainage. May be provided.
The watering device 16 is provided with a drainage introduction pipe 18 that extends downward from the watering device 16 and allows the wastewater from the watering device 16 to flow downward. The drainage introduction pipe 18 has one end (upstream end) connected to the lower end of the watering device 16 and the other end (downstream end) connected to the siphon drainage pipe 22.

The drainage introduction pipe 18 includes a vertical pipe 18 </ b> A extending in the vertical direction (longitudinal direction) connected to the watering device 16, and an R-shaped R pipe 18 </ b> B connected to the horizontal pulling pipe 24. The vertical pipe 18A does not need to extend in the vertical direction, and may be slightly inclined.
The siphon drain pipe 22 is installed on the floor slab 14 without any gradient, communicates with the drain introduction pipe 18 and extends in the lateral direction, and communicates with the lateral duct 24 along the drainage stack 12. And a soot tube 26 extending downward.

The horizontal pulling tube 24 may have a slight gradient or a reverse gradient, and may be configured to be inclined and disposed in the horizontal direction.
The soot pipe 26 is connected to the junction joint 23 disposed in the drainage stack 12 and communicates with the drainage stack 12 via the junction joint 23.

  The horizontal pulling pipe 24 and the dredging pipe 26 are constituted by a drain pipe constituted by one path, and in the siphon drain pipe 22, the drain stand is not joined to other drain pipes on the way to the drain stand pipe 12. The drainage is guided to the pipe 12.

  The horizontal pulling pipe 24 causes the wastewater from the drainage introducing pipe 18 to flow in the lateral direction, and the dredge pipe 26 generates siphon force by causing the drainage from the horizontal pulling pipe 24 to flow down. A siphon force in the direction of drainage is applied to the drainage in the horizontal pipe 24 by the energy of the siphon head Hs generated in the dredger pipe 26.

  Further, if the horizontal pulling pipe 24 and the dredging pipe 26 are thinned, the drainage becomes full and siphon force is easily generated, while the wastewater treatment amount is reduced. Accordingly, the inner diameter of the horizontal pulling pipe 24 and the dredging pipe 26 is set to 20A, for example, in consideration of the ease of generation of siphon force and the required amount of wastewater treatment.

Here, as shown in FIG. 2, the siphon drainage system 10 includes an air chamber 28 in which the air in the drainage introduction pipe 18 pressed by the drainage from the watering device 16 can flow out, and the air chamber 28. A communication pipe 30 that communicates with the drainage introduction pipe 18 is provided.
The air chamber 28 is formed inside a bag-like bag member 34 formed of a film body, and is a sealed space in which the chamber can be expanded and contracted.

An opening 34A is formed in the bag member 34, and the communication pipe 30 is connected to the opening 34A. As the bag member 34, an elastic material made of elastic material can be used. As the material, for example, rubber, vinyl, elastomer or the like can be used.
The bag member 34 is bulged and expanded when air flows into the internal air chamber 28, and is flattened when air flows out of the internal air chamber 28.

  The forming member that forms the air chamber 28 is not limited to the bag member 34, and various members can be used. As a formation member, you may comprise with the cylinder in which the piston was provided so that reciprocation was possible, for example. In this configuration, the air chamber formed inside the cylinder expands and contracts as the piston reciprocates.

  Moreover, as a forming member, as shown in FIG. 4, the cylindrical bellows-shaped member 37 which has the side wall 37A made into the bellows shape may be sufficient. The bellows-like member 37 has one end (upper end in FIG. 4) closed, the other end (lower end in FIG. 4) opened, and the open end communicating with the communication pipe 30. The bellows-like member 37 has a bellows-like side wall 37A that can be expanded and contracted. As shown in FIG. 5, the side wall 37A expands to expand the air chamber 28, and the side wall 37A shrinks as shown in FIG. As a result, the air chamber 28 is reduced.

  The communication pipe 30 communicates between the lower part of the drainage introduction pipe 18 and one end (upstream end) above the siphon activation reference head, and the other end (downstream end) is upward at a position below the watering device 16. The air chamber 28 extends and communicates with the air chamber 28. Thus, the air chamber 28 communicates with the drainage introduction pipe 18 above the siphon activation reference head. In the figure, the siphon activation reference head is indicated by the sign His.

Specifically, the upstream end of the communication pipe 30 is connected to the vertical pipe 18 </ b> A of the drainage introduction pipe 18. The upstream end of the communication pipe 30 may be connected to the upper part of the drainage introduction pipe 18.
Further, the upstream end of the communication pipe 30 may be connected to the R pipe 18B of the drainage introduction pipe 18 or may be connected to the drainage introduction pipe 18 below the siphon activation reference head.

  Further, the downstream end of the communication pipe 30 may be disposed above the watering device 16 as shown in FIG. As described above, if the downstream end of the communication pipe 30 is disposed above the watering device 16, the air chamber 28 can be disposed above the watering device 16, and the wastewater is more drained from the drainage introduction pipe 18 into the air chamber 28. Inflow can be prevented. Further, the downstream end portion of the communication pipe 30 may have the same height as the watering device 16.

  In addition, the communication pipe 30 is formed in an L shape with an intermediate portion bent, and includes a horizontal pipe 30A extending in the horizontal direction from the drainage introduction pipe 18 and a vertical pipe 30B extending upward from the horizontal pipe 30A. ing. The communication pipe 30 may be configured to extend obliquely upward from the drain introduction pipe 18 as shown in FIG. 7, or may be configured to extend in the horizontal direction as shown in FIG.

  Further, as shown in FIG. 9, the communication pipe 30 includes an oblique pipe 30 </ b> C extending obliquely upward from one end connected to the drainage introduction pipe 18, and the other end bent to extend vertically upward from the intermediate part. The vertical tube 30 </ b> B can be configured such that the vertical tube 30 </ b> B communicates with the air chamber 28. Thus, by extending one end portion obliquely upward from the drainage introduction pipe 18, the air in the drainage introduction pipe 18 can be effectively released. Further, by directing the other end connected to the air chamber 28 in the vertical direction, wastewater that has entered the air chamber 28 can be dropped into the communication pipe 30 when the air chamber 28 is reduced. It is possible to suppress the stagnation of the waste water.

The siphon activation reference head is a water level in the drainage pipe (drainage introduction pipe 18 and siphon drainage pipe 22) necessary for generating siphon force. This is based on the phenomenon that a certain amount of pressure is required to push water into the siphon drainage pipe, and the siphon force will not be generated no matter how much time passes unless the water level reaches this level. It is.
The communication pipe 30 may be omitted, or the bag member 34 may be directly connected to the drainage introduction pipe 18.

  The drainage introduction pipe 18 is provided with a ventilation valve 32 that allows air from the outside to pass through the drainage introduction pipe 18 and does not allow drainage to pass through the drainage introduction pipe 18 to the outside. As the vent valve 32, a check valve constituted by various mechanical elements such as an elastic body such as a membrane valve described later or a ball check valve can be used.

In addition, the inflow resistance of air flowing from the air chamber 28 to the drainage introduction pipe 18 side is smaller than the inflow resistance of air flowing from the vent valve 32 to the drainage introduction pipe 18 side. That is, air is more likely to flow into the drainage introduction pipe 18 from the air chamber 28 than from the ventilation valve 32.
This ease of air flow can be adjusted by, for example, increasing the flexibility of the forming member forming the air chamber 28 and making the air chamber 28 easily expand and contract. Further, by using an elastically deformable member such as rubber as a forming member and exerting a restoring force to reduce the enlarged air chamber 28, air further flows into the drainage introduction pipe 18 from the air chamber 28. It becomes easy.
Further, the inflow resistance can be adjusted by the flow resistance in the path between the air chamber 28 and the drainage introduction pipe 18. For example, by increasing the flow path width of the path and shortening the flow path length, the flow resistance can be reduced, and air can easily flow into the drainage introduction pipe 18 from the air chamber 28.

  The ventilation valve 32 may be configured not to the drainage introduction pipe 18 but to the communication pipe 30 as shown in FIG. Further, the siphon drainage system 10 may have a configuration without the ventilation valve 32.

Moreover, as shown in FIG. 11, the structure which uses a self-sealing drain trap as a ventilation valve may be sufficient.
In the configuration shown in FIG. 11, the watering device 16 is provided with a membrane valve 40 as an example of a self-sealing drain trap used as a vent valve. The membrane valve 40 is formed in a cylindrical shape with an elastic material, the upstream side is always open, the downstream side can be opened and closed, and is closed in a free state.

Further, the membrane valve 40 is attached in the vertical direction along the drainage introduction pipe 18, and the upstream end portion 40A is disposed on the upper side and the downstream end portion 40B is disposed on the lower side.
The membrane valve 40 is a cylindrical molded product made of an elastic body such as rubber, and in the free state, the upstream end 40A side is shown in FIGS. 11 (A), 12 (A), and 13 (A). As shown in FIG. 13, it is formed into a shape that is gradually crushed toward the downstream end 40B, and the cross section is elliptical in the middle, as shown in FIG. At the end 40B, as shown in FIG. 12B, the inner circumferential surfaces that are linear when viewed from the axial direction are in contact with each other and the opening is closed.

The downstream end portion 40B is closed so that the opening can be opened and closed, and when the drainage does not flow into the membrane valve 40 and the drainage introduction pipe 18 is not under negative pressure, the opening is maintained closed. To be brazed.
Further, the downstream end 40B is shown in FIGS. 11 (B), 12 (C), and 13 (B) when drainage flows into the membrane valve 40 and when the inside of the drainage introduction pipe 18 becomes negative pressure. As shown, it opens at that pressure.

(Operation of the siphon drainage system 10 according to the present embodiment)
Next, the operation of the siphon drainage system 10 according to the present embodiment will be described.
According to the configuration of the siphon drainage system 10 according to the present embodiment, the drainage from the water surrounding device 16 flows downward in the drainage introduction pipe 18. The drainage that has flowed downward in the drainage introduction pipe 18 further flows laterally in the horizontal pulling pipe 24.

Next, the drainage flows down the soot pipe 26, and siphon force is generated by the potential energy of the siphon head Hs in the soot pipe 26. This siphon force induces drainage in the drainage introduction pipe 18, the horizontal pulling pipe 24 and the dredging pipe 26, and promotes the drainage.
For this reason, even if there is no downgradation down to the side of the dredging pipe 26 in the horizontal pulling pipe 24, drainage can be guided by siphon force even if there is a slight reverse inclination.

Here, when a small amount of drainage is made in the siphon drainage system 10, as shown in FIG. 14A, the drainage flowing through the vertical pipe 18A of the drainage introduction pipe 18 is as shown in FIG. 14B. As shown in FIG. 14C, the upstream ends of the R pipe 18B and the horizontal pulling pipe 24 of the drainage introducing pipe 18 are accumulated at the upstream ends of the R pipe 18B and the horizontal pulling pipe 24 of the drainage introducing pipe 18. It may be blocked.
In particular, in the configuration in which the disposer 21 is provided, the waste water is caused to flow together with the pulverized material. Therefore, the pulverized material and the waste water are likely to remain in the R pipe 18B in the drainage introduction pipe 18 and the like. Air tends to be difficult to be discharged downstream.

  As described above, in the case where the air in the drainage introduction pipe 18 becomes difficult to be discharged to the downstream side due to the drainage accumulated in the downstream end part in the drainage introduction pipe 18 or the upstream end part of the horizontal pulling pipe 24. As shown in FIG. 15, when drainage is performed from the watering device 16, the drainage introduction pipe 18 becomes positive pressure, and the air in the drainage introduction pipe 18 that is pressed by the drainage from the watering device 16 is air chamber 28. Begins to flow into.

Air in the drainage introduction pipe 18 flows into the air chamber 28, and the bag member 34 is expanded as shown in FIG. 16, and the air in the drainage introduction pipe 18 can escape to the air chamber 28.
As a result, the drainage from the watering device 16 flows almost freely through the drainage introduction pipe 18, so that the wastewater flows smoothly through the drainage introduction pipe 18, and the stagnation of the wastewater near the drain outlet 16 </ b> A of the watering equipment 16 is suppressed. it can.

  Further, as shown in FIG. 14, the upstream ends of the R pipe 18 </ b> B of the drainage introduction pipe 18 and the horizontal pulling pipe 24 are blocked by drainage, so that the drainage trap 17 of the watering device 16, that is, drainage. Since air is confined in the introduction pipe 18, the air chamber 28 is communicated with the drainage introduction pipe 18. According to the configuration of this embodiment, the air chamber is provided at the intermediate portion of the horizontal drawing pipe 24 or the downstream end portion of the horizontal drawing pipe 24. Compared with the configuration in which 28 is communicated, air that becomes drainage resistance can be efficiently released.

In addition, since the drainage from the watering device 16 is almost free-falling through the drainage introduction pipe 18, the drainage flows into the horizontal pulling pipe 24, so that the siphon is started quickly.
Further, in the configuration of the present embodiment, even if air flows into the air chamber 28, the air chamber 28 is a sealed space, so that no foul odor leaks to the outside.

Further, in the configuration of the present embodiment, the air chamber 28 communicates with the drainage introduction pipe 18 above the siphon activation reference head, so that the wastewater does not easily flow into the air chamber 28 from the drainage introduction pipe 18.
Further, according to the configuration of the present embodiment, the communication pipe 30 has the other end portion that extends upward communicates with the air chamber 28, so that the waste water does not easily flow into the air chamber 28 from the drain introduction pipe 18. .
Further, according to the configuration of the present embodiment, the communication pipe 30 can be extended upward in the lower space of the watering device 16, so that the wastewater is less likely to flow into the air chamber 28 from the drainage introduction tube 18 and the watering device. The communication pipe 30 fits into the 16 lower spaces.

  In addition, as shown in FIG. 17, when the wastewater that has flowed through the drainage introduction pipe 18 flows through the horizontal pulling pipe 24 and flows down the dredge pipe 26 and siphon force acts, air is discharged together with the wastewater in the drainage introduction pipe 18. As shown in FIG. 18, the air that has been pulled downstream and escaped into the air chamber 28 flows into the drainage introduction pipe 18, and the bag member 34 becomes flat. Thereby, the inside of the drainage introduction pipe 18 is unlikely to become negative pressure.

Further, as shown in FIG. 19, when the air in the drainage introduction pipe 18 is pulled downstream after the air in the air chamber 28 is exhausted, the air flows in from the vent valve 32, and the inside of the drainage introduction pipe 18. Is less prone to negative pressure. In the example shown in FIG. 19, specifically, in the drainage introduction pipe 18, the downstream pipe portion 18 </ b> Y downstream of the vent valve 32 remains negative pressure, and the upstream pipe portion 18 </ b> X upstream of the vent valve 32. However, it becomes a state of no pressure or a slight negative pressure (smaller than the negative pressure in the downstream pipe portion 18Y).
As a result, problems caused by negative pressure in the drainage introduction pipe 18 (in the upstream pipe section 18X in the example shown in FIG. 19), for example, sucking air with a water-sealed drain trap of the watering device 16 Can eliminate noise and drainage trap breakage.

  FIG. 20 shows a change in the average pressure in the drainage introduction pipe 18 to the siphon drainage pipe 22 when the flushing device 16 is washed, the state change of the bag member 34 due to the pressure fluctuation, and the ventilation of the ventilation valve 32. It shows the state. An arrow A in FIG. 20 indicates that the bag member 34 is in an expanded state, an arrow B indicates that the bag member 34 is in a flat state, and an arrow C indicates that the vent valve 32 is in a vented state. Indicates.

When flushing is performed in the watering device 16, the inside of the drainage introduction pipe 18 becomes positive pressure in the time until the siphon force is activated, and after the siphon force is activated, the siphon force is irregularly removed. At that moment, the inside of the drainage introduction pipe 18 is positively charged instantaneously. When the inside of the drainage introduction pipe 18 becomes a positive pressure, the bag member 34 is expanded. Since the time during which the inside of the drainage introduction pipe 18 is positive is limited, it is possible to cope with the case where the capacity of the air chamber 28 is limited, such as the bag member 34.
Note that the siphon force occurs irregularly after starting as described above. The portion where the siphon force is activated is referred to as “pulsation” in time series. The shorter the interval between pulsations, the more efficiently the siphon force is activated and the higher the wastewater treatment capacity.

On the other hand, while the siphon force is activated and the siphon force is acting, the inside of the drainage introduction pipe 18 becomes negative pressure. When the pressure inside the drainage introduction pipe 18 becomes negative, the bag member 34 is in a flat state.
Since the time during which the inside of the drainage introduction pipe 18 becomes negative pressure is longer than the time when the inside of the drainage introduction pipe 18 becomes positive pressure, not only the capacity of the air chamber 28 like the bag member 34 is limited, As in the present embodiment, it is desirable that a vent valve 32 capable of flowing air into the drainage introduction pipe 18 is provided.

  Further, since the positive pressure and the negative pressure in the drainage introduction pipe 18 are repeated, the air escaped into the air chamber 28 first flows into the drainage introduction pipe 18 and then the ventilation valve 32 as in the present embodiment. It is desirable that the air in the air chamber 28 is contracted and returned to the original state when the positive pressure is reached by the inflow of air. As a result, even when the pressure becomes negative again after becoming negative pressure, the air in the drainage introduction pipe 18 pressed by the drainage can be released into the air chamber 28, and the drainage port 16 </ b> A of the watering device 16. The stagnation of the nearby drainage can be effectively suppressed.

The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made.
For example, as shown in FIGS. 21 and 22, a communication pipe 33 communicating with the drainage introduction pipe 18 may be provided separately from the communication pipe 30, and the ventilation valve 32 may be provided in the communication pipe 33. In the configuration shown in FIGS. 21 and 22, the communication pipe 33 is formed in an L shape with an intermediate portion bent, and has a horizontal pipe 33 </ b> A extending in the horizontal direction from the drainage introduction pipe 18 and upward from the horizontal pipe 33 </ b> A. The vertical pipe 33 </ b> B extends.

In the configuration shown in FIG. 21, the horizontal pipe 33 </ b> A is connected to the drainage introduction pipe 18 at a position higher than the horizontal pipe 30 </ b> A of the communication pipe 30. Further, the height of the upper end of the vertical pipe 33 </ b> B is arranged at a position lower than the upper end of the vertical pipe 30 </ b> B of the communication pipe 30. The vent valve 32 is disposed at the upper end of the vertical pipe 33B, and is disposed at a position lower than the bag member 34 disposed at the upper end of the vertical pipe 30B of the communication pipe 30.
The height of the upper end of the vertical pipe 33B may be arranged at a position higher than the upper end of the vertical pipe 30B of the communication pipe 30. Further, the vent valve 32 may be disposed at a position higher than the bag member 34.

On the other hand, in the configuration shown in FIG. 22, the horizontal pipe 33 </ b> A is connected to the drainage introduction pipe 18 at a position lower than the horizontal pipe 30 </ b> A of the communication pipe 30. Further, the height of the upper end of the vertical pipe 33 </ b> B is arranged at a position higher than the upper end of the vertical pipe 30 </ b> B of the communication pipe 30. A vent valve 32 is disposed at the upper end of the vertical pipe 33B, and is disposed at a position higher than the bag member 34 disposed at the upper end of the vertical pipe 30B of the communication pipe 30.
The height of the upper end of the vertical pipe 33B may be arranged at a position lower than the upper end of the vertical pipe 30B of the communication pipe 30. The vent valve 32 may be disposed at a position lower than the bag member 34.

  Further, as shown in FIGS. 23 and 24, a connecting pipe 35 connected to the upstream side of the horizontal pulling pipe 24 is provided, and a downstream side of the R pipe 18 </ b> B of the drainage introduction pipe 18 is connected to an intermediate portion of the connecting pipe 35. It may be configured. In the configuration shown in FIGS. 23 and 24, the connecting pipe 35 includes a portion to which the R pipe 18 </ b> B of the drainage introduction pipe 18 is connected and a lower portion 35 </ b> A disposed on the lower side of the part, and the R of the drainage introduction pipe 18. And an upper portion 35B disposed above the portion to which the tube 18B is connected.

The drainage from the drainage introduction pipe 18 flows into the lower part 35 </ b> A of the connection pipe 35, and this drained drainage is discharged to the horizontal pulling pipe 24. A bag member 34 is provided at the upper end of the connection pipe 35, and the air in the drainage introduction pipe 18 can flow into the air chamber 28 through the upper part 35 </ b> B of the connection pipe 35.
In the configuration shown in FIG. 23, the vent valve 32 is provided in the vertical pipe 18 </ b> A of the drainage introduction pipe 18. On the other hand, in the configuration shown in FIG. 24, the vent valve 32 is provided in the upper part 35 </ b> B of the connection pipe 35.

In the siphon drainage system having the configuration shown in FIG. 2 described in the embodiment, tests were performed on siphon start time, pulsation time, water level rise in the drain trap, and whether the air chamber was full. The test was carried out under the condition that the air chamber was not installed as a comparative example, the capacity of the air chamber was changed as shown in Table 1 in Examples 1 to 9, and the other conditions were the same as below. The test results are shown in Table 1. The air chamber increases in cost as the capacity increases, and if the capacity is less than 600 cc, it can be easily stored under the floor of a standard apartment house. However, if the capacity exceeds 600 cc, it is necessary to consider storage.
[Capacity of drainage introduction pipe]: 200cc
[Length of horizontal pipe]: 8m
[Length of tubule]: 2.5m
[Vertical pipe length of drainage introduction pipe]: 700mm
[Flow rate of drainage]: 8.0 (L / min)
[Inner diameter of siphon drain pipe]: 20A
[Air chamber]: Polyethylene vinyl bag

From Table 1, it was found that the air chamber was full even when (the capacity of the air chamber / the capacity of the drainage introduction pipe) exceeded 100%. This is because air flows into the air chamber even after the air accumulated in the drainage introduction pipe is discharged.
Moreover, although the capacity of the air chamber is about 25% of the capacity in the drainage introduction pipe (Example 1), the siphon start time and the pulsation interval are shortened compared to the comparative example, but the capacity of the air chamber is within the drainage introduction pipe. It can be seen that the siphon start time and the pulsation interval are shortened to the maximum at 50% or more of the capacity (Examples 2 to 9). Even if the air chamber becomes full, it can be seen that the siphon force is not affected if the capacity of the air chamber is 50% or more of the capacity in the drainage introduction pipe.
Moreover, although the water level in a trap always rises in a comparative example and Example 1, it turns out that it is an occasional rise in Example 2, and does not rise in Examples 3-9.
From the above, in order to realize an effective siphon start time and pulsation time, (the capacity of the air chamber / the capacity of the drainage introduction pipe) is preferably 50% or more. In order not to cause an increase in the water level in the trap, it is preferable that (the capacity of the air chamber / the capacity of the drainage introduction pipe) is 100% or more. In consideration of the storage under the floor, the capacity of the air chamber is preferably less than 600 cc. In addition, when the air chamber does not become full (the capacity of the air chamber / the capacity of the drainage introduction pipe) exceeds 400%, the cost becomes unnecessarily high. The capacity of the introduction pipe is preferably 400% or less.

DESCRIPTION OF SYMBOLS 10 Siphon drainage system 16 Watering device 18 Drainage introduction pipe 21 Disposer 24 Horizontal pulling pipe 26 Saddle pipe 28 Air chamber 30 Communication pipe 32 Ventilation valve 34 Bag member 40 Membrane valve (an example of a self-sealing drain trap)

Claims (10)

A drainage introduction pipe that extends downward from the watering device and allows the wastewater from the watering device to flow downward;
A horizontal pulling pipe that communicates with the drainage introduction pipe and extends in the lateral direction, and allows the drainage from the drainage introduction pipe to flow laterally;
A vertical pipe that communicates with the horizontal pipe and extends downward, and generates siphon force by flowing down drainage from the horizontal pipe;
A sealed air chamber that communicates with the drainage introduction pipe above the siphon activation reference head, allows the air in the drainage introduction pipe pressed by the drainage from the watering device to flow in, and can be expanded and contracted. ,
Siphon drainage system with.   2. The siphon drainage system according to claim 1, wherein an indoor volume of the air chamber at the time of maximum expansion is 50% to 400% of a volume in the drainage introduction pipe. Communicating the drain inlet pipe and the one end portion in the above said siphon start reference hydrocephalus and the other end according to claim 1 or claim 2 comprising a communicating pipe communicating with the air chamber with which extends upwardly Siphon drainage system. The siphon drainage system according to claim 3 , wherein the communication pipe has one end communicating with a lower part of the drainage introduction pipe and the other end extending upward. The siphon drainage system according to claim 4 , wherein the communication pipe extends obliquely upward from the one end portion, and the other end portion extends in the vertical direction and communicates with the air chamber. The siphon drainage system according to any one of claims 1 to 5, further comprising a vent valve that allows air from outside to pass through the drainage introduction pipe and does not allow drainage to pass from the drainage introduction pipe to the outside. The siphon drainage system according to claim 6 , wherein an inflow resistance of air flowing from the air chamber to the drainage introduction pipe side is smaller than an inflow resistance of air flowing from the vent valve to the drainage introduction pipe side. The vent valve is
Provided drain outlet of the water around the instrument, are formed in a cylindrical shape of an elastic material, the upstream side is always open, downstream side is opened and closed, and a drain trap of the self-sealing type are closed in a free state according Item 8. A siphon drainage system according to item 6 or claim 7 . The siphon drainage system according to any one of claims 1 to 8 , wherein the air chamber includes a bag-shaped bag member formed in a film body. 10. The disposer according to any one of claims 1 to 9 , wherein the watering device is provided with a disposer that pulverizes the input material that has been introduced into the outlet of the watering device and that allows the pulverized material to flow down together with the drainage. The siphon drainage system described.

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