JP6742193B2 - Siphon drainage system - Google Patents

Description

The present invention relates to siphon drainage systems.

In recent years, a so-called siphon drainage system has been proposed as an alternative to the conventional gradient drainage system (see, for example, Patent Document 1). The siphon drainage system has a vertical pipe that generates siphon power by filling the inside of the pipe with water.

Japanese Patent Laid-Open No. 2000-297447

Conventionally, in the vertical pipe of the siphon drainage system, the drop position on one floor and the connection position to the merging joint portion on the lower floor are arranged on the same vertical axis.
For this reason, when draining water at a low flow rate (for example, about 5 L/min), the drainage flows along the wall surface of the vertical pipe, and the inside of the pipe cannot be filled with the siphon force.

In view of the above facts, the present invention has an object to provide a siphon drainage system capable of generating siphon force even with a small flow rate.

The siphon drainage system according to claim 1 is a laterally extending pipe that extends in the lateral direction and flows the drainage from the water swirl device, and a first pipe that is connected to the downstream side of the laterally extracting pipe and extends in the vertical direction. A vertical portion, an inclined portion provided on the downstream side of the first vertical portion and inclined with respect to the vertical direction, and a second vertical portion provided on the downstream side of the inclined portion and extending in the vertical direction. And a vertical pipe that allows the drainage from the horizontal pipe to flow downward, and the inclined portion is provided above an intermediate portion in the vertical direction of the vertical pipe.

In the siphon drainage system according to the first aspect, the drainage from the water supply device flows into the vertical pipe through the horizontal pipe. The vertical pipe has a first vertical portion provided on the upstream side extending in the vertical direction and an inclined portion inclined to the vertical direction provided on the downstream side thereof, so that drainage from the horizontal pipe is vertical. The drainage speed of the drainage that falls in the vertical direction and flows into the inclined portion increases, and the drainage direction of the drainage that falls in the first vertical portion is changed in the inclined portion with respect to the vertical direction. In the above, the behavior of the drainage is largely changed, and the full-filled portion is likely to be partially formed in the inclined portion (compared to the case where there is no first vertical portion on the upstream side of the inclined portion).

Then, when the full portion of the drainage falls on the first vertical portion and the inclined portion in this manner, a siphon force is generated. Further, when the full drainage portion formed in the sloped portion flows into the second vertical portion on the downstream side, the downward direction of the full drainage portion changes from the inclination direction to the vertical direction, and the full drainage portion flows down in the sloped portion. Compared with the case, the flow velocity increases. As a result, the siphon force can be increased as compared with the case where all the downstream side of the first vertical portion is inclined.

The invention according to claim 2 is the siphon drainage system according to claim 1, wherein the inclined portion is provided with a first inclined portion extending in a first direction when viewed from a vertical direction, and on a downstream side of the first inclined portion. The second inclined portion is provided and extends in a direction different from the first direction when viewed from the vertical direction.

In the siphon drainage system according to claim 2, the drainage discharged from the first vertical portion flows into the first inclined portion, the drainage direction is changed, and the drainage discharged from the first inclined portion is changed to the first inclined portion. It flows into the second inclined portion, and the drainage direction is changed at the second inclined portion. In this way, in the inclined portion, the drainage direction is changed twice, so that the behavior of the drainage can be changed significantly compared to the case where the drainage direction is changed once, and the filled portion in the inclined portion is more It is easily formed.

The invention according to claim 3 is the siphon drainage system according to claim 1 or 2, wherein the siphon drainage system is provided on the downstream side of the horizontal pipe and upstream of the vertical pipe, and the bottom surface of the inner peripheral wall is the Horizontally following the bottom part of the horizontal draw pipe, the ceiling surface of the inner peripheral wall is gradually reduced in height from the upstream side to the downstream side, the flow path cross-sectional area is reduced toward the downstream side, and a reduction pipe portion, A horizontal pipe portion that is connected to a downstream end portion of the reduction pipe portion and has a diameter smaller than that of the horizontal drawing pipe and that extends in the horizontal direction.

In the siphon drainage system according to claim 3, on the downstream side of the horizontal pipe, the bottom surface of the inner peripheral wall is horizontal following the bottom portion of the horizontal pipe portion, and the height of the ceiling surface of the inner peripheral wall is from the upstream side. A reduction pipe portion is provided which gradually decreases toward the downstream side and whose flow passage cross-sectional area reduces toward the downstream side. Therefore, since the ceiling surface of the flow path of the horizontal pipe section on the downstream side of the reduction pipe section is located below the ceiling surface of the flow path of the horizontal pulling pipe on the upstream side, the liquid level of the drainage is set to the horizontal pipe section. It becomes easy to make contact with the ceiling surface of the flow path, and it becomes easy to fill the flow path on the downstream side of the reduction pipe section with water by drainage from the horizontal pipe section.

As described above, the siphon drainage system of the present invention has an excellent effect that the siphon force can be generated even with a small flow rate.

FIG. 1A is a side view showing the overall configuration of the siphon drainage system according to the first embodiment, and FIG. 1B is a right side view of the vertical pipe member shown in FIG. .. It is a vertical cross-sectional view along the axis of a 1st inclination part. (A) is a side view showing a vertical pipe member of the siphon drainage system according to the second embodiment, and (B) is a right side view of the vertical pipe member shown in FIG. Yes, (C) is a plan view of the vertical tube member as viewed from above. It is sectional drawing along the axis line of the diameter conversion joint vicinity of the siphon drainage system which concerns on 3rd Embodiment. It is sectional drawing along the axis line near the diameter conversion joint which shows the state at the time of small amount drainage of the siphon drainage system which concerns on 3rd Embodiment.

[First Embodiment]
A first embodiment of a siphon drainage system according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram showing the overall configuration of a siphon drainage system 10 according to this embodiment. The siphon drainage system 10 according to the present embodiment is a drainage system that efficiently discharges drainage from a water supply equipment by using siphon power.

The siphon drainage system 10 is used for an apartment house composed of a plurality of floors, and as shown in FIG. 1, includes a drainage stack 12 for drainage to flow downward. The drainage stack 12 extends in the vertical direction (vertical direction) of the housing complex and penetrates the floor slab 14 on each floor of the housing complex. The siphon drainage system according to the present invention is preferably used for an apartment house, but can also be used for a detached house, a factory, etc. other than the apartment house.

A water supply device 16 is provided at each door on each floor of the housing complex, and a drain trap 18 is connected to the water supply device 16 on the downstream side in the drainage direction. On the downstream side of the drain trap 18 in the drainage direction, a first L-shaped pipe member 20 bent in an L-shape is arranged. The first L-shaped pipe member 20 is connected to the drain trap 18 and extends vertically, the vertical portion 20A, the horizontal portion 20B that is disposed horizontally on the floor slab 14 and extends horizontally, and the vertical portion 20A and the horizontal portion. It is configured to include a curved portion 20C that connects 20B.

On the downstream side of the first L-shaped pipe member 20 in the drainage direction, a horizontal draw pipe member 21 that is arranged on the floor slab 14 and extends in a horizontal direction, that is, a direction perpendicular to the vertical direction is arranged. The first L-shaped pipe member 20 and the laterally drawn pipe member 21 are connected via a joint 22.

A second L-shaped pipe member 23 that is bent in an L-shape is arranged on the downstream side of the horizontal draw pipe member 21 in the drainage direction. The second L-shaped piping member 23 includes a horizontal portion 23A arranged on the floor slab 14 and extending in the horizontal direction, a vertical portion 23B extending in the vertical direction, and a curved portion 23C connecting the horizontal portion 23A and the vertical portion 23B. It is configured. The horizontal draw pipe member 21 is connected to the horizontal portion 23A of the second L-shaped pipe member 23 via a joint 25.

A vertical pipe member 27 that extends in the vertical direction is arranged on the downstream side of the second L-shaped pipe member 23 in the drainage direction. The vertical pipe member 27 is connected to the vertical portion 23B of the second L-shaped pipe member 23 via the joint 29. The downstream end of the vertical pipe member 27 in the drainage direction is connected to a merging joint 56 attached to an intermediate portion of the drainage stack 12.

In the present embodiment, the piping portion horizontally arranged on the floor slab 14, specifically, the horizontal portion 20B of the first L-shaped piping member 20, the horizontal drawing pipe member 21, and the horizontal portion of the second L-shaped piping member 23. 23A is a horizontal pipe 31A of the siphon drain pipe 31, and the vertical portion 23B of the second L-shaped pipe member 23 and the vertical pipe member 27 are vertical pipes 31B of the siphon drain pipe 31.

As shown in FIG. 1(A), the vertical tube member 27 of the present embodiment is provided with a first vertical portion 27A extending in the vertical direction on the upper side, and with respect to the vertical direction on the lower side of the first vertical portion 27A. The first inclined portion 27B inclined toward the left side in the drawing (direction of arrow C) is provided, and the second vertical portion 27C extending in the vertical direction is provided below the first inclined portion 27B. Therefore, the first vertical portion 27A and the second vertical portion 27C are horizontally offset (dimension A).
When the vertical tube member 27 shown in FIG. 1(A) is viewed in the direction of arrow B, it looks like a straight line as shown in FIG. 1(B).

Further, when the vertical length of the vertical pipe 31B is L, the first inclined portion 27B is located at a position that is ½ L in height from the lower end of the vertical pipe 31B, that is, the middle portion in the height direction of the vertical pipe 31B. It is provided above.

In the present embodiment, the inner diameter of the first L-shaped pipe member 20, the inner diameter of the laterally drawn pipe member 21, the inner diameter of the second L-shaped pipe member 23, and the inner diameter of the vertical pipe member 27 are set to the same inner diameter.

(Action, effect)
According to the siphon drainage system 10 of the present embodiment, the drainage discharged from the water supply equipment 16 joins the drainage stack 18 through the drainage trap 18, the siphon drainage pipe 31, and the joining joint 56.

Here, when a large amount of drainage flows into the siphon drainage pipe 31 from the water supply device 16, the horizontal draw pipe 31A is filled with drainage, and then the drainage flows to the vertical pipe 31B while maintaining a full fill state. When the fully-filled wastewater falls in the vertical pipe 31B due to gravity, the siphon force is generated by the potential energy of the siphon head Hs. The drainage inside the horizontal draw pipe 31A is sucked toward the vertical pipe 31B by the siphon force and flows down, so that the drainage is efficiently performed.

On the other hand, when the drainage discharged from the water handling device 16 is small and the flow rate of the drainage flowing into the vertical pipe 31B per unit time is small, the drainage flows through the lower side of the horizontal pipe section 54 and the air flows in the upper side. Since a space in which the horizontal axis remains is formed, the horizontal pipe section 54 may not be filled with water. If a full-filled part is not formed inside the vertical pipe 31B on the downstream side, no siphoning force is generated.

However, in the siphon drainage system 10 of the present embodiment, a part of the vertical pipe 31B is provided with the first inclined portion 27B that is inclined with respect to the vertical direction, and therefore even a small amount of drainage is shown in FIG. As described above, the filled water portion Wm can be formed inside the first inclined portion 27B by the behavior of the drained water W in the pipe, and the siphon force generated by the fall of the filled water portion Wm can efficiently perform the drainage. ..

When the first vertical portion 27A is provided on the upper side of the first inclined portion 27B as in the present embodiment, the drainage W from the horizontal pulling pipe 31A falls in the first vertical portion 27A in the vertical direction. In comparison with the case where the upper side of the first inclined portion 27B is also inclined, the speed of the drainage W flowing into the first inclined portion 27B is increased, and the behavior of the drainage W is increased in the first inclined portion 27B. A full water portion Wm is easily formed in the portion 27B. As a result, the siphon drainage system 10 of the present embodiment can easily generate siphon power even with a small amount of drainage.

Then, when the full water portion Wm formed in the first inclined portion 27B flows into the second vertical portion 27C on the downstream side, the downward direction of the full water portion Wm changes from the inclination direction to the vertical direction, and the full water portion flows down in the vertical direction. The flow-down velocity of Wm increases as compared with the case of flowing down in the first inclined portion 27B. As a result, the siphon force can be increased as compared with the case where all the downstream side of the first vertical portion 27A is inclined.

[Second Embodiment]
Next, the siphon drainage system 10 according to the second embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
As shown in FIGS. 3(A) and 3(B), the vertical pipe member 27 of the siphon drainage system 10 of the present embodiment has a different configuration from that of the first embodiment, and the lower side of the first inclined portion 27B. In addition, a second inclined portion 27D inclined in a direction different from that of the first inclined portion 27B is provided. Specifically, as shown in FIG. 3(A), the first inclined portion 27B is inclined to the left side of the drawing in FIG. 3(A) (direction of arrow C), and when the vertical tube member 27 is viewed from the direction of arrow B, As shown in FIGS. 3B and 3C, the second inclined portion 27D is inclined in the arrow D direction.

In the siphon drainage system 10 of this embodiment, in the vertical pipe member 27, the drainage discharged from the first vertical portion 27A flows into the first inclined portion 27B to change the drainage direction, and further, the first inclined portion 27B. The drainage discharged from the second inclined portion 27D flows into the second inclined portion 27D, and the drainage direction is changed at the second inclined portion 27D. In the vertical pipe member 27 of the present embodiment, the drainage direction is changed twice in the inclined portion in this manner, and thus the behavior of the drainage can be significantly changed compared to the case where the drainage direction is changed once. It becomes easier to form a full-filled part in the inclined part.

[Third Embodiment]
Next, the siphon drainage system 10 which concerns on the 3rd Embodiment of this invention is demonstrated. The same components as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
As shown in FIG. 4, in the present embodiment, the horizontal draw pipe member 21 and the second L-shaped pipe member 23 are connected by the diameter conversion joint 28.

In the present embodiment, the inner diameter φD of the laterally drawn pipe member 21 is larger than the inner diameter φd of the second L-shaped pipe member 23. In other words, the second L-shaped pipe member 23 has a smaller diameter than the laterally drawn pipe member 21. Although not shown, the inner diameter of the vertical pipe member 27 is the same as the inner diameter of the second L-shaped pipe member 23.

As shown in FIG. 4, the diameter conversion joint 28 is configured to include a tubular first connecting member 30 and a tubular second connecting member 32, and is arranged horizontally. On the upstream side of the first connection member 30, a first insertion hole 34 into which the laterally drawn pipe member 21 is inserted is formed. An annular groove 36 is formed on the inner peripheral surface of the first insertion hole 34, and a seal member 38 made of an annular elastic body is fitted into the annular groove 36.

A second insertion hole 42 into which a large-diameter portion 40 of a second connection member 32, which will be described later, is inserted is formed on the downstream side of the first connection member 30.

On the inner peripheral surface of the first connecting member 30, an annular stopper having a smaller diameter than the first insertion hole 34 and the second insertion hole 42 is provided between the first insertion hole 34 and the second insertion hole 42. 44 are formed. The end of the horizontal pipe member 21 and the end of the second piping member 26 are abutted against the stopper 44, respectively.

The second connecting member 32 has a small diameter portion 46 formed on the downstream side. The large diameter portion 40 of the second connection member 32 is inserted and fixed in the second insertion hole 42 of the first connection member 30.

Inside the second connection member 32, a flow channel 48 whose flow channel cross-sectional area gradually decreases from the upstream side to the downstream side is formed on the upstream side, and an insertion hole 50 having a constant diameter is formed on the downstream side. There is. The inner diameter of the insertion hole 50 is formed to be slightly larger than the inner diameter of the downstream end of the flow path 48. The flow channel 48 of the present embodiment has a circular cross section perpendicular to the axial direction, and is formed so that the diameter gradually decreases from the upstream side to the downstream side. Further, the insertion hole 50 has a circular cross section at a right angle in the axial direction.

Here, the inner diameter φD of the laterally drawn pipe member 21, the inner diameter of the stopper 44 of the first connecting member 30, and the inner diameter of the second connecting member 32 on the upstream side of the flow path 48 are the same. Therefore, the inner peripheral surface of the laterally drawn tube member 21, the inner peripheral surface of the stopper 44, and the inner peripheral surface on the upstream side of the flow path 48 are smoothly connected without a step.

Further, the second L-shaped pipe member 23 is inserted and connected to the insertion hole 50 of the second connection member 32. The inner diameter of the second L-shaped piping member 23 is the same as the inner diameter of the downstream end of the flow path 48, so that the inner peripheral surface of the second L-shaped piping member 23 and the downstream side of the flow path 48 are The circumference is smoothly connected without any step.

Further, the lower end of the inner peripheral surface of the laterally drawn pipe member 21, the lower end of the inner peripheral surface of the stopper 44 of the first connecting member 30, the lower end of the inner peripheral surface of the flow passage 48 of the second connecting member 32, that is, the bottom surface, The lower end of the inner peripheral surface of the portion of the second piping member 26 that is inserted into the insertion hole 50 of the second connection member 32 is connected in a straight line in the horizontal direction without any step.

In the present embodiment, the portion of the second connecting member 32 where the flow passage 48 in which the flow passage cross-sectional area gradually decreases from the upstream side toward the downstream side is formed corresponds to the reduction pipe portion of the present invention. The horizontal portion 23A of the second L-shaped pipe member 23 corresponds to the horizontal pipe portion of the present invention.

(Action, effect)
In the siphon drainage system 10 of the present embodiment, since the diameter conversion joint 28 that reduces the flow passage cross-sectional area toward the downstream side is provided on the downstream side of the horizontal draw pipe member 21, as shown in FIG. Even when the drainage W inside the horizontal draw pipe member 21 is small, the inside of the pipe can be brought close to full water in the vicinity of the diameter conversion joint 28, in other words, on the upstream side of the first inclined portion 27B of the vertical pipe member 27, The full-filled portion Wm can be easily generated at the downstream first inclined portion 27B.

[Other Embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and needless to say, various modifications can be made without departing from the scope of the invention. Is.

In the above embodiment, the horizontal portion 20B of the first L-shaped piping member 20, the horizontal pulling pipe member 21, and the horizontal portion 20B of the first L-shaped piping member 20 extend in the horizontal direction, but these may extend in the horizontal direction. Good. Here, the lateral direction is not limited to the horizontal direction which is a direction of 90° with respect to the vertical direction, but refers to a range of 90°±5° with respect to the vertical direction. 90°+5° means that the downstream side in the drainage direction is inclined so as to be above the upstream side, and 90°-5° is inclined so that the downstream side is below the upstream side. It means that

Further, in the above embodiment, the vertical portion 23B of the second L-shaped pipe member 23, the first vertical portion 27A of the vertical pipe member 27, and the second vertical portion 27C of the present embodiment extend in the vertical direction. The vertical portion 23B, the first vertical portion 27A, and the second vertical portion 27C may be inclined up to 5° with respect to the vertical direction.

In the vertical pipe member 27, the first inclined portion 27B has a linear shape in which substantially the whole is inclined in one direction when viewed from one direction, but the present invention is not limited to this, and the first inclined portion 27B is entirely formed. It may be curved or spiral.

DESCRIPTION OF SYMBOLS 10... Siphon drainage system, 16... Water supply equipment, 27A... 1st vertical part, 27B... 1st inclination part (inclination part), 27C... 2nd vertical part, 27D... 2nd inclination part (inclination part), 31A... Horizontal draw pipe, 31B... Vertical pipe, 32... Portion of second connecting member 32 where flow path is formed (reduction pipe portion), 23A... Horizontal portion (horizontal pipe portion)

Claims (3)

A horizontal pull pipe that extends in the lateral direction and flows the drainage from the water supply equipment,
A first vertical portion that is connected to the downstream side of the horizontal pipe and extends in the vertical direction, an inclined portion that is provided on the downstream side of the first vertical portion and that is inclined with respect to the vertical direction, and a downstream of the inclined portion. A vertical pipe that is provided on the side and that includes a second vertical portion that extends in the vertical direction and that causes the drainage from the horizontal draw pipe to flow downward,
The siphon drainage system, wherein the inclined portion is provided above the vertical middle portion of the vertical pipe. The inclined portion is a first inclined portion extending in a first direction when viewed from the vertical direction, and a second inclined portion that is provided on the downstream side of the first inclined portion and extends in a direction different from the first direction when viewed in the vertical direction. The siphon drainage system of claim 1, wherein the siphon drainage system has an inclined portion. It is provided on the downstream side of the horizontal pipe, and on the upstream side of the vertical pipe, the bottom surface of the inner peripheral wall is horizontal following the bottom portion of the horizontal pipe, and the ceiling surface of the inner peripheral wall is from the upstream side to the downstream side. A reduction pipe portion whose height gradually decreases toward and the flow passage cross-sectional area is reduced toward the downstream side;
A horizontal pipe portion connected to the downstream end of the reduction pipe portion and extending in the horizontal direction having a smaller diameter than the horizontal draw pipe;
The siphon drainage system according to claim 1 or 2, further comprising:

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