JP7393320B2 - siphon drainage system - Google Patents

Description

The present invention relates to a siphon drainage system equipped with a storage tank that temporarily stores and discharges wastewater.

As shown in Patent Document 1, in a drainage system that utilizes the siphon force of a siphon drain pipe, a storage tank is provided between a plumbing fixture and a horizontal draw pipe of the siphon drain pipe, and the siphon drains water from the plumbing fixture. A configuration is known in which the fuel is temporarily stored in a storage tank until it starts.

In the siphon drainage system of Patent Document 1, for example, when a bathtub of a unit bath is drained, the wastewater discharged from the bathtub flows into a storage tank. The waste water that flows into the storage tank flows through the horizontal pipe of the siphon drainage pipe, and then flows into the vertical pipe.

In a siphon drain pipe, siphon force does not occur unless the vertical pipe is full of wastewater and falls inside the vertical pipe, so in the initial stage of drainage until siphon force is generated, the amount of water discharged by the siphon drain pipe is less than the amount in the storage tank. Since the amount of wastewater flowing into the tank is smaller than the amount of wastewater flowing into the tank, the water level of the wastewater in the storage tank rises. After that, when the vertical pipe becomes full of wastewater and a siphon force is generated, the amount of water discharged by the siphon drain pipe exceeds the amount of wastewater flowing into the storage tank, and the water level of the wastewater decreases.

By the way, since the siphon drain pipe in which the siphon force is generated has a large suction force, it is possible to quickly suction the waste water in the storage tank. When the water level drops to near the opening of the siphon drain pipe, the water level near the opening of the siphon drain pipe may drop locally, causing the siphon drain pipe to suck in air from inside the storage tank. .

When the siphon drain pipe sucks in the air inside the storage tank along with the drainage, it may generate an abnormal noise inside the storage tank, and this abnormal noise resonates in the air layer of the storage tank. When abnormal noise resonates in the air layer of the storage tank, it may cause the walls of the storage tank to vibrate, and the abnormal noise may eventually be emitted to the outside of the storage tank.

Therefore, in the siphon drainage system of Patent Document 2, an intake pipe is connected to the siphon drainage pipe on the downstream side of the storage tank to introduce some air into the siphon drainage pipe to weaken the siphon force that sucks the drainage water from the storage tank. This prevents the water level near the drain pipe opening from dropping locally and suppresses the occurrence of abnormal noise.

Furthermore, in the siphon drainage system of Patent Document 2, in the initial stage of drainage when siphon force is not generated, a large amount of wastewater discharged from plumbing equipment is quickly flowed into the inside of the storage tank, so that the upper part of the storage tank is It is configured so that the air inside the storage tank is discharged to the outside using the provided ventilation piping. Furthermore, when a siphon force is generated and the water level of the wastewater in the storage tank decreases, outside air is introduced through the ventilation pipe to prevent the inside of the storage tank from becoming a negative pressure. That is, the ventilation pipe provided at the upper part of the storage tank serves as an exhaust pipe for discharging the air in the storage tank and as an intake pipe for introducing air into the storage tank.

JP2013-209868A JP2017-190626A

In this way, in the drainage system shown in Patent Document 2, piping for discharging air from the storage tank and introducing air into the storage tank and piping for introducing air into the siphon pipe are installed separately. As a result, the number of parts related to piping was large.

In view of the above-mentioned facts, the present invention aims to provide a siphon drainage system that can suppress noise from reverberating in a storage tank and minimize the number of parts.

The siphon drainage system according to claim 1 includes: a storage tank for storing wastewater flowing in from upstream; a horizontal pipe connected to the storage tank and discharging the wastewater from the storage tank in a horizontal direction; A vertical pipe that is disposed downstream of the draw pipe and generates a siphon force by causing the waste water from the horizontal draw pipe to flow down, and an intake/exhaust joint connected to the storage tank, The joint includes a siphon intake pipe that allows air to flow into the inside of the horizontal drawing pipe, and an intake exhaust pipe that allows air to flow into the inside of the storage tank and allows air to be discharged from the inside of the storage tank. It has an integrated structure.

According to the siphon drainage system according to the first aspect, when waste water flows into the storage tank, the waste water is temporarily stored in the storage tank. In the initial state when wastewater flows into the storage tank and the vertical pipe is not yet full, siphon force is not generated, so the amount of wastewater flowing into the storage tank per unit time is The amount of wastewater per unit time is small, and the water level of the wastewater rises in the storage tank. Then, as the waste water flows into the storage tank and the water level of the waste water in the storage tank rises, the air in the storage tank is pushed and discharged to the outside of the storage tank via the intake/exhaust pipe. This allows wastewater to flow into the storage tank quickly and efficiently.

When the wastewater that has flowed into the storage tank flows into the vertical pipe via the horizontal draw pipe, and the full flow of wastewater falls inside the vertical pipe due to gravity, a siphon force is generated. When a siphon force is generated, the wastewater in the storage tank is sucked toward the vertical pipe, and the wastewater flows down in a full flow, allowing for rapid and efficient drainage.

When a siphon force is generated, the water level of the wastewater in the storage tank begins to fall. When the water level of the wastewater in the storage tank falls, air outside the storage tank flows into the storage tank from the intake and exhaust pipes, creating negative pressure inside the storage tank and preventing drainage through the siphon drain pipe. There isn't.

Furthermore, when the inside of the vertical pipe becomes full and a siphon force is generated, the inside of the horizontally drawn pipe becomes negative pressure, so that air flows into the inside of the horizontally drawn pipe from the siphon intake pipe. In the siphon drainage system according to claim 1, the horizontal draw pipe sucks in air downstream of the storage tank, so that the suction force acting on the drainage inside the storage tank can be appropriately reduced. In this case, air is prevented from being sucked in through the opening of the horizontal drawing pipe, and the generation of abnormal noise inside the storage tank is suppressed.

The intake/exhaust joint used in the siphon drainage system according to claim 1 includes a siphon intake pipe that allows air to flow into the inside of the horizontal drawing pipe, a siphon intake pipe that allows air to flow into the inside of the storage tank, and a joint that allows air to flow into the inside of the storage tank. Since it has an integrated intake and exhaust pipe that can exhaust air, the number of parts related to piping can be kept to a minimum compared to when these are installed separately with separate piping. .

Note that the "lateral direction" in "a horizontal draw pipe that discharges wastewater in a horizontal direction" is not limited to the horizontal direction, but also includes a slight inclination (for example, 5 degrees or less).

According to a second aspect of the invention, in the siphon drainage system according to the first aspect, the interior of the intake/exhaust joint is partitioned into the intake/exhaust pipe and the siphon intake pipe by a partition wall.

The intake/exhaust joint of the siphon drainage system according to the second aspect of the present invention can realize an intake/exhaust joint equipped with an intake/exhaust pipe and a siphon intake pipe with a simple structure by providing a partition wall inside the joint.

The invention according to claim 3 is the siphon drainage system according to claim 1 or 2, wherein the intake/exhaust pipe is provided with an intake/exhaust port at an upper part inside the storage tank.

When wastewater flows into the storage tank, in the initial state of drainage where the inside of the vertical pipe is not yet full, siphon force is not generated, so the amount of water flowing into the storage tank per unit time is The amount of wastewater discharged per unit time is small, and the water level of the wastewater rises in the storage tank.
In the siphon drainage system according to claim 3, as wastewater flows into the storage tank and the water level of the wastewater in the storage tank rises, the air in the storage tank is pushed by the wastewater to the upper part of the intake exhaust pipe. It is discharged to the outside through the intake and exhaust ports provided in the. This allows wastewater to flow into the storage tank quickly and efficiently.
Thereafter, when a siphon force is generated in the vertical pipe, the wastewater that has flowed into the storage tank is sucked toward the vertical pipe, and the wastewater flows down in a full flow, allowing efficient drainage.

Afterwards, when the inside of the vertical pipe becomes full and a siphon force is generated, the wastewater that has flowed into the storage tank is sucked toward the vertical pipe, and the wastewater flows down as a full flow, ensuring efficient drainage. become. As a result, the water level of the waste water in the storage tank begins to fall. When the water level of the wastewater in the storage tank falls, outside air flows into the storage tank from the intake and exhaust ports, so there is no negative pressure inside the storage tank that will interfere with drainage through the siphon drain pipe. .

The invention according to claim 4 is the siphon drainage system according to claim 3, in which the siphon intake pipe has a distal end portion located above the opening of the horizontal drawing pipe in the storage tank inside the storage tank. and is located below the intake/exhaust port.

When a siphon force is generated and the water level of the wastewater in the storage tank decreases, and the water level of the wastewater approaches the opening of the piping, the water level of the wastewater falls below the tip of the siphon intake pipe, and the air inside the storage tank flows into the siphon intake pipe. It flows into the horizontal draw pipe through the pipe. When the horizontal draw pipe sucks in air, the suction force acting on the waste water in the storage tank is moderately reduced, so the water level near the opening of the horizontal draw pipe drops locally, and the horizontal draw pipe sucks the air inside the storage tank. Inhalation is inhibited. Therefore, it is possible to suppress the generation of abnormal noise caused by the air in the storage tank being sucked into the horizontal draw pipe together with the drainage water.

Note that the siphon suction pipe does not suck in air in the storage tank until the decreasing water level of the waste water leaves the tip of the siphon suction pipe, so no air flows into the horizontal drawing pipe. That is, since air does not flow into the horizontal pipe, the siphon force generated in the vertical pipe does not decrease, and the waste water from the storage tank can be discharged quickly and efficiently. In other words, the waste water in the storage tank can be quickly and efficiently discharged until there is little remaining waste water in the storage tank.

The siphon high water system according to claim 5 is the siphon drainage system according to any one of claims 1 to 4, in which the horizontal draw pipe is provided in a part of the storage tank side downstream in the drainage direction. It has a sloped part that slopes downward toward the side, and the siphon intake pipe is connected to the sloped part.

The horizontal drawing pipe of the siphon drainage system according to claim 5 has an inclined part on a part of the storage tank side that is inclined downward toward the downstream side in the drainage direction, so that the sucked air is drained. The wastewater remaining in the drainage path on the storage tank side from the part in contact with the tank can be caused to flow by its own weight toward the downstream side in the drainage direction, so that no wastewater remains in the part on the storage tank side from this part.

According to the siphon drainage system of the present invention, it has the excellent effect of suppressing noise from reverberating in the storage tank and making it possible to minimize the number of parts.

1 is a side view showing the overall configuration of a siphon drainage system according to an embodiment of the present invention. It is a sectional view showing a storage tank and the vicinity of an intake/exhaust joint of a siphon drainage system according to an embodiment of the present invention. (A) is a partially cross-sectional plan view showing the storage tank and the vicinity of the intake/exhaust joint of the siphon drainage system according to an embodiment of the present invention, and (B) is a plan view showing the siphon intake pipe and the intake/exhaust joint of the intake/exhaust joint. FIG. 3 is a cross-sectional view (a cross-sectional view taken along the line 3(B)-3(B) in FIG. 3(A)) showing the intake and exhaust pipes.

A siphon drainage system 10 according to an embodiment of the present invention will be explained using FIGS. 1 to 3. The siphon drainage system 10 according to the present embodiment is a drainage system that efficiently discharges wastewater from plumbing fixtures using siphon force.

As shown in FIG. 1, a floor panel 16 is arranged above the slab 14 of the building 12 with a space therebetween. Plumbing equipment 17 is arranged on the floor panel 16. The plumbing fixture 17 is, for example, a bathtub, a kitchen sink, a dishwasher, etc., for draining water, but it may also be a washbasin, a bathroom waterproof pan, etc.

The plumbing fixture 17 is connected to one end of a pipe 18 through which waste water discharged from the plumbing fixture 17 flows. Note that the pipe 18 is, for example, a pipe made of vinyl chloride, but may be made of other synthetic resin.

(Storage tank)
As shown in FIG. 2, a storage tank 20, which forms part of the siphon drainage system 10, is arranged above the slab 14.
The storage tank 20 is formed into a box shape so that the drainage water from the plumbing fixture 17 can be temporarily stored therein. The storage tank 20 has a substantially rectangular parallelepiped shape, and a top plate 20A and a bottom plate 20B are inclined downward in the direction of arrow R in the drawing. The storage tank 20 is made of, for example, a synthetic resin material such as vinyl chloride.

The top plate 20A is provided with an inspection port 21, and the inspection port 21 is covered with a removable lid 23.

The other end of the pipe 18 is connected to one side wall 20C of the storage tank 20 in the direction of the arrow L in the drawing, near the bottom plate, so that the drainage from the plumbing fixture 17 flows into the storage tank 20. There is.

One end of a pipe 22 is connected to the lower side of one side wall 20C of the storage tank 20 and the other side wall 20D on the side in the direction of arrow R in the drawing, which faces the side wall 20C.

The pipe 22 is inclined downward in the direction of arrow R. A T-shaped joint 24 is arranged at the other end of the pipe 22. The T-shaped joint 24 includes a first connection portion 24A to which the piping 22 is connected, a second connection portion 24B located on the opposite side of the first connection portion 24A, and a connection between the first connection portion 24A and the second connection portion 24B. A third connecting portion 24C is provided between the third connecting portions 24C and extending upward perpendicular to the direction connecting the first connecting portions 24A and the second connecting portions 24B. The first connecting portion 24A and the second connecting portion 24B are provided coaxially, and the center line CL of the first connecting portion 24A and the second connecting portion 24B is inclined downward in the direction of the arrow L. ing. Note that, although the piping 22 and the T-shaped joint 24 are made of, for example, vinyl chloride, they may be made of other synthetic resins.

(siphon drain pipe)
A horizontal draw pipe 26A of a siphon drain pipe 26 that constitutes a part of the siphon drain system 10 is connected to the second connecting portion 24B of the T-shaped joint 24. A portion of the horizontal draw pipe 26A near the T-shaped joint 24 is inclined, but the downstream side thereof is disposed horizontally on the slab 14 without any slope. As shown in FIG. 1, a vertical pipe 26B extending downward (vertically downward) is continuous to the downstream end of the horizontal draw pipe 26A.
Although the siphon drain pipe 26 of this embodiment is made of polybutene, it may be made of other flexible synthetic resin.

In this embodiment, the horizontally drawn pipe 26A, the area from the first connecting portion 24A to the second connecting portion 24B of the T-shaped joint 24, and the piping 22 correspond to the horizontally drawn pipe of the present invention.

A vertically extending vertical pipe 28 is provided in the building 12. A merging joint 30 is attached to the vertical pipe 28, and the waste water discharged through the siphon drain pipe 26 is discharged to the vertical pipe 28 via the merging joint 30.

One end of a pipe 32 extending upward is connected to the third connecting portion 24C of the T-shaped joint 24, and the other end of this pipe 32 is connected to an intake/exhaust joint 34, which will be described later, to form the T-shaped joint. The inside of 24 communicates with the outside.

(Structure of intake and exhaust joints)
As shown in FIGS. 2 and 3, an intake/exhaust joint 34 is connected to a side wall 20D of the storage tank 20. The intake/exhaust joint 34 includes a first pipe section 36 that penetrates the side wall 20D, and a second pipe section 38 that is arranged outside the storage tank 20 and extends horizontally and perpendicularly from the side of the first pipe section 36. It is equipped with

The first tube portion 36 includes a horizontal portion 36A that is arranged horizontally and passes through the side wall 20D, and an inclined portion 36B that is provided on the side in the direction of arrow L of the horizontal portion 36A and slopes downward.
Note that the tip 36BE of the inclined portion 36B is formed horizontally and is located above the upper end 22A of the inner circumferential surface of the pipe 22.

In the intake/exhaust joint 34, the inside of the horizontal portion 36A is divided into two parts by a partition wall 42, one side of the partition wall 42 (the side in the direction of arrow A) serves as the intake/exhaust pipe 44, and the other side of the partition wall 42 (the side in the direction of arrow A) serves as the intake/exhaust pipe 44. B-direction side) is a siphon intake pipe 46. As shown in FIG. 3, the inclined portion 36B of the first pipe portion 36 serves as a siphon intake pipe 46. As shown in FIG.

The intake/exhaust joint 34 is provided with a first connecting portion 36AE that communicates with the intake/exhaust pipe 44 at the end of the first pipe portion 36 in the direction of arrow R. is connected at one end. The other end of the ventilation pipe 40 is connected to the vertical pipe 28 (see FIG. 1) via a merging joint 30 (see FIG. 1).

An intake/exhaust port 48 is opened at the upper part of the intake/exhaust pipe 44 arranged inside the storage tank 20 , so that the inside of the storage tank 20 is connected to the inside of the vertical pipe 28 via the intake/exhaust pipe 44 . It communicates with space.

In addition, the intake/exhaust joint 34 is provided with a second connection part 38E that communicates with the siphon intake pipe 46 at the end of the second pipe part 38 in the direction of arrow B. The other end of 32 is connected.

Note that the intake/exhaust joint 34 is made of, for example, vinyl chloride, but may be made of other synthetic resin.

(action, effect)
Next, the functions and effects of the siphon drainage system 10 of this embodiment will be explained.
When the waste water from the plumbing fixture 17 is discharged from the pipe 18, the waste water flows into the storage tank 20.

Since the bottom plate 20B of the storage tank 20 is inclined so that the siphon drain pipe 26 side is lower than the pipe 18 side into which wastewater flows, the waste water flows inside the storage tank 20 from the pipe 18 side to the siphon drain pipe. The water flows to the siphon drain pipe 26 side and begins to accumulate from the siphon drain pipe 26 side, and the water depth on the siphon drain pipe 26 side becomes deeper than on the piping 18 side.

Then, as the wastewater flows into the storage tank 20 and the water level of the wastewater in the storage tank 20 rises, the air in the storage tank 20 is pushed, and the intake/exhaust port 48 opened at the upper part of the intake/exhaust pipe 44, The air is discharged into the vertical pipe 28 via the intake/exhaust pipe 44, the ventilation pipe 40, and the merging joint 30. This allows wastewater to flow into the storage tank 20 quickly and efficiently.

Thereafter, the waste water that has flowed into the storage tank 20 flows into the siphon drain pipe 26 via the pipe 22 and the T-shaped joint 24, and when the full flow of waste water falls by gravity inside the vertical pipe 26B, the siphon water head Hs increases. Siphon force is generated due to potential energy. When the siphon force is generated, the waste water in the storage tank is sucked toward the vertical pipe 26B, and the waste water flows down in a full flow, so that the water can be drained efficiently.

By the way, in the initial state of drainage where the vertical pipe 26B of the siphon drain pipe 26 is not yet full when the waste water flows into the storage tank 20, no siphon force is generated, so the units flowing into the storage tank 20 are The amount of drainage per unit time by the siphon drain pipe 26 is smaller than the amount of drainage per unit time, and the water level of the drainage in the storage tank 20 rises.

Then, when the inside of the vertical pipe 26B of the siphon drain pipe 26 becomes full and a siphon force is generated, the waste water in the storage tank 20 is sucked by the pipe 22, and the water level of the waste water in the storage tank 20 starts to fall. When the water level of the wastewater in the storage tank 20 falls, the air in the vertical pipe 28 flows into the storage tank 20 from the intake/exhaust port 48, so the pressure inside the storage tank 20 becomes negative and the siphon drain pipe 26 does not impede drainage.

Here, if the suction force by the piping 22 is strong, when the water level of the drainage approaches the upper end 22A of the inner circumferential surface of the piping 22, the water level near the opening of the piping 22 will locally drop, causing the horizontal drawing pipe 26A to drop. The air in the storage tank 20 may be sucked in, and an abnormal noise, for example, a buzzing noise, may be generated in the storage tank 20. Then, this abnormal noise resonates in the air layer of the storage tank 20, vibrates the wall surface of the storage tank 20, and may be emitted to the outside of the storage tank 20.

In the siphon drainage system 10 of this embodiment, when the water level of the drainage water in the storage tank 20 decreases and the water surface approaches the opening of the piping 22, the water surface of the drainage water rises above the inclined portion 36B of the intake/exhaust joint 34 (siphon intake pipe 46). It is lower than the tip 36BE, and the air inside the storage tank 20 flows into the siphon drain pipe 26 via the siphon intake pipe 46 and the T-shaped joint 24.

When the siphon drain pipe 26 sucks air from the storage tank 20 downstream of the storage tank 20, the suction force acting on the drainage inside the storage tank 20 is moderately reduced, so that the water surface near the opening of the pipe 22 is reduced. This prevents the pipe 22 from locally lowering and sucking the air in the storage tank 20.

Therefore, it is possible to suppress the generation of an abnormal noise caused by the air inside the storage tank 20 being sucked into the pipe 22 together with the drainage water, and no abnormal noise is heard inside the storage tank 20. Therefore, the vibration of the wall surface of the storage tank 20 and emission of abnormal noise to the outside of the storage tank 20 is also suppressed.
In this way, the siphon drainage system 10 of the present embodiment suppresses the noise generated during drainage from propagating into the indoor environment.

Note that the intake/exhaust joint 34 (siphon intake pipe 46) does not suck in air until the decreasing water level of the drainage water leaves the tip 36BE of the inclined portion 36B of the intake/exhaust joint 34 (siphon intake pipe 46). , air does not flow into the horizontal drawing pipe 26A. That is, since air does not flow into the horizontal draw pipe 26A, the siphon force generated in the vertical pipe 26B does not decrease, and the waste water from the storage tank 20 can be discharged quickly and efficiently. In other words, the waste water in the storage tank 20 can be quickly and efficiently discharged until there is little remaining waste water in the storage tank 20. The height position of the tip end 36BE of the inclined portion 36B may be determined so that the water level of the drainage water near the opening of the pipe 22 does not locally drop and cause abnormal noise.

By the way, when the siphon drain pipe 26 sucks air through the pipe 32, air may be mixed with the waste water inside the T-shaped joint 24, and abnormal noise may be generated inside the T-shaped joint 24. However, the level of the noise generated inside the T-shaped joint 24 is very small compared to the noise that is heard inside the storage tank 20, such as when the pipe 22 sucks in air along with drainage water. Furthermore, the abnormal noise generated inside the T-shaped joint 24 is blocked by the drainage water flowing inside the pipe 22 and does not propagate to the air layer inside the storage tank 20. Abnormal noise generated inside the T-shaped joint 24 will not be heard in the air layer.

As shown in FIG. 2, the part P where the air sucked from the pipe 32 contacts the drainage water, in other words, the center line CL of the first connecting part 24A and the second connecting part 24B and the center line of the third connecting part 24C. The distance DL from the intersection to the inner surface of the storage tank 20 may be set so that the drainage path between the portion P and the storage tank 20 is filled with drainage water during drainage. In addition, the piping 22 may be abolished and the T-shaped joint 24 may be directly connected to the storage tank 20 so that the distance DL is shortened, or the piping 22 may be made longer than in FIG. 2 so that the distance DL is longer. good. In other words, when discharging wastewater from the storage tank 20, the distance DL may be set so as to suppress the suction of air within the storage tank 20, which is the cause of abnormal noises that resonate within the storage tank 20.

By the way, even after all the waste water in the storage tank 20 has been discharged, the siphon force of the vertical pipe 26B will not act on the waste water remaining in the horizontal pipe 26A until the waste water in the vertical pipe 26B has finished falling. acts. However, when air is sucked in the middle of the drainage path on the downstream side of the storage tank 20, the suction force becomes weaker for the drainage remaining in the drainage path upstream of the position where the air is sucked. Put it away. Therefore, if the drainage path upstream of the position where air is sucked is horizontal, the drainage remaining in the horizontal part will be difficult to flow downstream with a weak suction force, and as a result, the drainage will remain in the horizontal part. It's an easy situation.

In the siphon drainage system 10 of the present embodiment, the drainage path on the side of the storage tank 20 from the part P where the air sucked from the piping 32 comes into contact with the drainage water is inclined toward the downstream side in the drainage direction. The waste water remaining in the drainage path on the storage tank 20 side from the part P where the air comes in contact with the waste water is caused to flow under its own weight toward the downstream side in the drainage direction, leaving the waste water in the part on the storage tank 20 side from the part P. You can avoid it.

Note that the portion P where the sucked air comes into contact with the drainage is the sloped portion of the drainage path as in this embodiment, or the boundary SP between the sloped portion 26Aa and the horizontal portion 26Ab of the horizontal draw pipe 26A, in other words, It is preferable to provide it at the upstream end of the horizontal portion 26Ab.

In the siphon drainage system 10 of the present embodiment, the intake/exhaust joint 34 connected to the storage tank 20 allows air to flow into the intake/exhaust pipe 44 that discharges air in the storage tank when wastewater flows in, and the horizontal drawing pipe 26A. Since the siphon intake pipe 46 and the siphon intake pipe 46 are integrally provided, compared to the case where the intake exhaust pipe 44 and the siphon intake pipe 46 are provided separately (in other words, the configuration of the prior art), the piping-related The number of parts has been reduced to a minimum.

[Other embodiments]
Although an example of an embodiment of the present invention has been described, the present invention is not limited to this embodiment, and various other embodiments are possible within the scope of the present invention.

In the above embodiment, the horizontally drawn pipe 26A of the siphon drain pipe 26 was connected to the storage tank 20 via the T-shaped joint 24 and the piping 22, but the end of the horizontally drawn pipe 26A was connected directly to the storage tank 20. You may. In this case, a hole may be machined in the horizontal drawing pipe 26A, and the pipe 32 may be connected to the machined hole.

Although the storage tank 20 has a rectangular box shape, the storage tank 20 is not limited to the rectangular box shape, but may have other shapes such as a cylinder shape with a circular cross section with both ends closed.

In the above embodiment, the end of the ventilation pipe 40 is connected to the merging joint 30, but the end of the ventilation pipe 40 may be opened to the outside, for example.

10...Siphon drainage system, 20...Storage tank, 26A...Horizontal pipe, 26B...Vertical pipe, 34...Intake/exhaust joint, 42...Partition wall, 44...Intake/exhaust pipe, 46...Siphon intake pipe, 48...Intake/exhaust port

Claims (5)

A storage tank that stores wastewater flowing in from upstream;
a horizontal draw pipe connected to the storage tank and discharging the wastewater from the storage tank in a horizontal direction;
a vertical pipe that is disposed downstream of the horizontal pipe and generates a siphon force by causing the waste water from the horizontal pipe to flow down;
an intake/exhaust joint connected to the storage tank;
Equipped with
The intake/exhaust joint includes a siphon intake pipe that allows air to flow into the horizontal drawing pipe, and an intake/exhaust pipe that allows air to flow into the storage tank and exhaust air from the storage tank. It has a pipe integrally,
Siphon drainage system. The siphon drainage system according to claim 1, wherein the intake/exhaust joint is partitioned into the intake/exhaust pipe and the siphon intake pipe by a partition wall. The siphon drainage system according to claim 1 or 2, wherein the intake/exhaust pipe is provided with an intake/exhaust port at an upper part inside the storage tank. 4. The siphon intake pipe according to claim 3, wherein a distal end portion of the siphon intake pipe is located inside the storage tank above an opening of the horizontal drawing pipe in the storage tank and below the intake/exhaust port. Siphon drainage system as described. The horizontal draw pipe has a slope part on a part of the storage tank side that slopes downward toward the downstream side in the drainage direction,
the siphon intake pipe is connected to the inclined part;
The siphon drainage system according to any one of claims 1 to 4.