JP7407996B2 - drainage system - Google Patents

Description

TECHNICAL FIELD The present invention relates to drainage systems.

Conventionally, rainwater basins have been placed in side gutters of bridges to drain rainwater (for example, see Patent Document 1).

The rainwater basin shown in Patent Document 1 includes a main body, an upper frame placed on the upper part of the main body, and a metal lid placed on the upper frame, and a drainage pipe is connected to the lower end of the main body. . Rainwater flowing in from the metal lid flows into the drainage pipe through the rainwater basin.

Japanese Patent Application Publication No. 2016-156243

However, in rainwater drainage with a conventional structure, even when attempting to discharge water at a high flow rate, air flows in due to the generation of swirling currents, so there is a limit to the flow rate. For this reason, the only way to increase the drainage flow rate was to increase the diameter of the pipes or increase the number of tanks installed.

An object of the present invention is to provide a drainage system capable of realizing high-flow drainage with a small diameter.

In order to achieve the above object, a drainage system according to a first invention includes a metal lid, a drainage basin, and a drainage member. The drainage basin has an opening in which a metal lid is placed. The drain member includes a lid member and a drain port, is disposed inside the drain basin, and induces the occurrence of a siphon phenomenon in water drained by a pipe connected to the drain port. The drain port is formed facing the lid member.

By providing the drainage member in this way, it is possible to realize high flow rate of drainage from the piping connected to the drainage member.

In addition, it is possible to generate a siphon phenomenon and realize high flow rate drainage with a small diameter. Therefore, it is possible to use piping with a smaller diameter than in the past, which reduces weight and improves work efficiency, and because less material is required, costs can also be reduced.

A drainage system according to a second invention is the drainage system according to the first invention, in which the drainage basin section further includes a constriction section. The diaphragm is arranged below the opening and has a smaller area than the opening. The drain port is arranged at the same level as the upper end or below the upper end of the throttle part.

In this way, by arranging the drain at the same level as the upper end of the constrictor or below the upper end of the constrictor, foreign matter can be discharged through the drainage member along with the water flowing from the opening toward the constrictor. Can be done.

Further, since the water is drained at a high flow rate by the drainage member, the foreign matter can be flushed through the pipe with great force, and as much as possible of the foreign matter can be discharged from the pipe. Therefore, it is possible to reduce the amount of foreign matter remaining in the piping and to reduce the occurrence of clogging.

A drainage system according to a third invention is the drainage system according to the second invention, in which the drainage member has an opening to the pipe, and the opening is connected to the drainage port. The diameter of the throttle part is r, the diameter of the drain member is R2, the diameter of the opening is R1, the height from the drain port to the lid member is H1, and the height from the drain port to the upper end of the throttle part is H2. Then, 0≦H2≦H1, R1≦r and r−R2≦100mm are satisfied.

As a result, foreign matter is drained by the drainage member in the range of 0≦H2≦H1. By setting R1≦r, drainage can flow in without resistance, and if r-R2 is larger than 100 mm, that is, if r is too large with respect to R2, foreign matter will not be sucked into the drainage member and will accumulate in the constriction part. However, by setting r-R2≦100 mm, foreign matter can be discharged without accumulating in the constriction portion.

The drainage system according to the fourth invention is the drainage system according to the second invention, in which the diameter of the throttle part is r, the diameter of the drainage member is R2, and the height from the drain port to the lid member is H1. , if the height from the drain port to the upper end of the throttle part is H2,
In the range of H1<H2, 20mm≦r-R2≦100mm is satisfied.

Thereby, foreign matter can be efficiently discharged together with the water flowing from the opening toward the constriction through the siphon drain member.

If r-R2 is smaller than 20 mm, there will be resistance to the inflow of waste water, making it impossible to obtain a high amount of waste water, and the effect of the present invention will be greatly reduced. Furthermore, if r is larger than 100 mm, that is, if r is too large relative to R2, foreign matter will not be sucked into the drainage member and will accumulate in the constriction part, but by setting r-R2≦100 mm, foreign matter will can be discharged without accumulating in the constriction part.

A drainage system according to a fifth invention is the drainage system according to the second invention, in which the drainage basin portion includes a lower basin and an upper basin. The lower cell has a constriction part. The upper cell has an opening and is placed above the lower cell.

Thereby, the drainage basin portion can be formed by at least two members, the upper basin and the lower basin. Further, the materials of the upper and lower cells can be changed; for example, the upper cell can be made of metal and the lower cell can be made of FRP (Fiber Reinforced Plastics).

A drainage system according to a sixth invention is the drainage system according to the second invention, in which the throttle part has a bottom surface forming a water stop surface.
Thereby, rainwater can be stopped by the bottom surface of the constriction part of the drainage basin part.

A drainage system according to a seventh aspect of the present invention is the drainage system according to the second aspect of the present invention, in which the throttle part has a cylindrical shape extending downward. The drainage basin section has a water stop member that covers the tip of the constriction section. The water stop member forms a water stop surface.
Such a water stop member forms a water stop surface and can stop rainwater.

A drainage system according to an eighth invention is the drainage system according to the second invention, in which the drainage basin portion has an area perpendicular to the opening that gradually decreases from the opening toward the constriction portion. It is formed.
This allows rainwater that has flowed into the opening to flow forcefully into the constriction part.

A drainage system according to a ninth invention is the drainage system according to the first invention, in which the drainage basin has a bottom surface that is smaller in area than the opening. The drain port is located at approximately the same position as the bottom surface. The bottom surface forms a water stop surface that stops water.

By arranging the drain port at substantially the same position as the bottom surface in this way, foreign matter can be discharged through the drain member along with the water flowing from the opening toward the bottom surface.

Furthermore, when a siphon phenomenon occurs due to the drainage member, the foreign matter can be forced to flow through the pipe, so that as much of the foreign matter as possible can be discharged from the pipe. Therefore, it is possible to reduce the amount of foreign matter remaining in the piping and to reduce the occurrence of clogging.

A drainage system according to a tenth invention is the drainage system according to the ninth invention, wherein the drainage basin is formed such that the area perpendicular to the opening gradually decreases from the opening toward the bottom surface. has been done.

This allows rainwater that has flowed into the opening to flow forcefully toward the bottom.

The drainage system according to the eleventh invention is the drainage system according to the sixth, seventh, or ninth invention, in which the water stop surface is penetrated by a pipe connected to the drainage port of the drainage member.
As a result, water is stopped by the water stop surface around the pipe.

A drainage system according to a twelfth invention is the drainage system according to any one of the first to eleventh inventions, in which the lid member has an opening to the pipe, and the opening is connected to the drainage port. The lid member is arranged to close the opening when viewed from above in the vertical direction, and the projected area of the lid member with respect to a plane perpendicular to the vertical direction is set to be larger than the projected area of the opening.

Thereby, even when the drainage member is disposed diagonally, the siphon phenomenon can be generated.

A drainage system according to a thirteenth invention is the drainage system according to any one of the first to twelfth inventions, and is provided in a side gutter of a bridge.

This allows for efficient drainage of rainwater that falls on the bridge.

According to the present invention, it is possible to provide a drainage system that can realize drainage at a high flow rate with a small diameter.

FIG. 1 is a diagram showing a state in which a drainage system according to an embodiment of the present invention is installed on a bridge. 1 is a schematic cross-sectional view showing the configuration of a drainage system according to an embodiment of the present invention. 3 is an exploded perspective view showing the metal lid and drainage basin section 20 of FIG. 2. FIG. FIG. 3 is a perspective view showing the siphon drain member of FIG. 2; FIG. 3 is a perspective sectional view showing the siphon drain member of FIG. 2; Front view of FIG. 5. The figure which shows the structure of the drainage system of a present Example. The figure which shows an example of the piping connection structure of the drainage system of a present Example. (a) Exploded view of the piping connection structure of FIG. 8, (b) A perspective view of the cap of FIG. 9(a) viewed from the bottom side. It is a figure showing the composition of the drainage system of a comparative example. FIG. 2 is a diagram showing a table of the results of Examples 1 and 2 and Comparative Examples 1 to 3. The cross-sectional schematic diagram which shows the structure of the drainage system in the modification of embodiment concerning this invention. The cross-sectional schematic diagram which shows the structure of the drainage system in the modification of embodiment concerning this invention.

EMBODIMENT OF THE INVENTION Below, the drainage system based on embodiment of this invention is demonstrated based on drawing.
<Configuration>
(Overview of drainage system 1)
FIG. 1 is a diagram showing a drainage system 1 according to an embodiment of the present invention installed on a bridge. As shown in the figure, a plurality of drainage systems 1 according to the present embodiment are arranged along the side gutter of a bridge 200. Rainwater falling on the bridge 200 flows into the drainage system 1 and is drained outside the bridge 200.

FIG. 2 is a schematic cross-sectional view showing the configuration of the drainage system 1 of this embodiment.
As shown in FIG. 2, the drainage system 1 of this embodiment includes a metal lid 10, a drainage basin section 20, and a siphon drain member 30.

(metal lid)
FIG. 3 is an exploded perspective view of the metal lid 10 and the drainage basin section 20.

The metal lid 10 is a metal lid having a plurality of holes. The plurality of holes may have any shape as long as it does not impede the inflow of rain; for example, they may be formed in a mesh shape like a grating, or may have a plurality of rectangular holes. The metal lid 10 is supported by a drainage basin part 20, and rainwater flows into the drainage basin part 20 from the metal lid 10. Although the metal lid 10 has a rectangular shape as an example in this embodiment, it is not limited to this and may have a polygonal shape other than a square, a circle, or an ellipse.

(Drainage basin)
The drainage basin section 20 has an upper basin 21, a lower basin 22, and a height adjustment part 23. The upper cell 21 is made of metal and is a frame placed around the metal lid 10. The inside of the upper cell 21 corresponds to the opening 20a of the drainage cell 20, and the metal lid 10 is disposed thereon.

The upper cell 21 has a side wall 41 and a lid placement part 42. The side wall 41 is formed to surround the metal lid 10. The lid mounting portion 42 is formed approximately perpendicularly to the side wall 41 from the lower end of the side wall 41 toward the inside. The metal lid 10 is placed on the lid placement part 42.

The lower cell 22 is made of FRP, for example, and includes a side wall 51, an upper cell support portion 52, a constriction portion 53, a connecting portion 54, and a formwork tube 55.

The side wall 51 is formed to surround the upper cell 21 . The upper cell support portion 52 is formed approximately perpendicularly to the side wall 51 from the lower end of the side wall 51 toward the inside. The upper cell 21 is supported by the upper cell support section 52 . The upper cell support section 52 and the lid placement section 42 are provided with a height adjustment section 23 that adjusts the height position of the upper cell 21 with respect to the lower cell 22.

The aperture part 53 has a cylindrical appearance and is provided below the upper cell support part 52. The constricted portion 53 has a cylindrical portion 53a and a bottom surface 53b. The aperture upper part 53c, which is the upper end of the cylindrical part 53a, is connected to the upper cell support part 52 by a connecting part 54, which will be described later. The bottom surface 53b is arranged so as to close the lower end, which is the tip of the cylindrical portion 53a.

Furthermore, as shown in FIG. 2, the diaphragm portion 53 is disposed closer to one of the left and right than the center of the opening 20a in the left-right direction. A through hole 53d is formed in the bottom surface 53b, and a pipe 90 inserted through the through hole 53d is provided.

As the pipes (including the pipe 90) used in the drainage system 1 of this embodiment, for example, those having a diameter of 75A to 125A can be used. The pipe 90 is arranged generally perpendicular to the bottom surface 53b, and its upper end is located inside the drainage basin section 20. The bottom surface 53b functions as a water stop surface that stops rainwater from leaking downward from the drainage basin section 20. Further, the bottom surface 53b corresponds to the lower end of the aperture part 53, which is the lower part of the aperture. Note that the space between the bottom surface 53b and the pipe 90 may be filled with a water stop agent or the like, or a cap-shaped member may be used as in the embodiment described later.

The connecting portion 54 connects the upper cell support portion 52 and the constriction portion 53. The connecting portion 54 connects the inner end of the upper cell support portion 52 to the upper end of the cylindrical portion 53a of the throttle portion 53. The connecting portion 54 is formed such that the cross-sectional area in the direction perpendicular to the opening 20a gradually decreases from the upper cell support portion 52 toward the constriction portion 53.

The formwork tube 55 has a cylindrical shape and is arranged around the cylindrical portion 53a of the constricted portion 53. The form pipe 55 protects the constricted portion 53 and the like from the concrete 201.

The height adjustment section 23 adjusts the height position of the upper cell 21 with respect to the lower cell 22. The height adjustment section 23 includes a bolt 61 and a nut 62. The bolt 61 is inserted into a through hole formed in the upper cell support portion 52. The bolt 61 is arranged substantially perpendicular to the upper cell support portion 52. The head 61a of the bolt 61 is in contact with the lid mounting portion 42 of the upper cell 21 from below. The nut 62 is fixed to the upper cell support portion 52 so as to be coaxial with the through hole. A bolt 61 is inserted through the nut 62. By changing the amount by which the bolt 61 is screwed into the nut 62, the height of the upper cell 21 relative to the lower cell 22 can be changed. The height adjustment section 23 may be provided on all of the opposing long sides and opposing short sides of the upper cell support section 52, or may be provided on only one of them.

Here, as shown in FIG. 2, concrete 201 is provided up to the upper end of the lower cell 22, and pavement 202 is provided above the concrete 201. The upper end of the pavement 202 and the upper end of the upper square 21 generally coincide with each other. The position of the upper cell 21 relative to the lower cell 22 can be adjusted by the height adjustment section 23 so as to match the thickness of the pavement 202.

(Siphon drain member)
The siphon drain member 30 (an example of a drainage member) induces the occurrence of a siphon phenomenon in water drained into the connected pipe 90. The siphon drain member 30 is a drainage member having a high drainage function for improving the drainage capacity of rainwater flowing into the drainage basin section 20.

FIG. 4 is a perspective view showing the siphon drain member 30. FIG. 5 is a perspective cross-sectional view of the siphon drain member 30. FIG. 6 is a front view of FIG. 5.

The siphon drain member 30 can be made by injection molding using a synthetic resin such as hard vinyl chloride resin, polycarbonate, ABS, or AES. Note that the material is not limited to synthetic resin, and may be made of cast iron using a mold.

The siphon drain member 30 includes a lid member 31, a mounting tube 32, and a plurality of vertical ribs 33.

The lid member 31 is plate-shaped and formed into a disk shape. The mounting cylinder 32 is formed into a cylindrical shape. The central axes of the lid member 31 and the mounting tube 32 are arranged on a common axis and coincide with each other in the vertical direction. This common axis is defined as a drain axis O, the mounting cylinder 32 of the siphon drain member 30 along the direction of the drain axis O is defined as the lower side, and the side of the lid member 31 is defined as the upper side. Further, in a plan view of the siphon drain member 30 from the direction of the drain axis O, the direction perpendicular to the drain axis O is defined as the radial direction, and the direction in which the siphon drain member 30 goes around the drain axis O is defined as the circumferential direction.

The mounting tube 32 has a tube portion 71 that forms the drop opening 34 and a plate-shaped collar portion 72 that extends radially outward from the upper end of the tube portion 71 . The connecting portion 32a on the inner surface side where the cylindrical portion 71 and the flange portion 72 are connected is formed in a bell mouth shape with a tapered surface or a curved surface. When the connecting portion 32a has a curved surface, the radius of curvature of the cross section in the direction parallel to the drain axis O is preferably 5 mm to 20 mm.

The droplet part 34 is a part that drains rainwater, and the opening at the upper end of the droplet part 34 (which can also be called the inner side of the upper end of the cylindrical part 71) is the drain port 34a. The drain port 34a can also be said to be inside the collar portion 72. The distance from the drain port 34a to the lid member 31 is approximately the same as the distance from the collar portion 72 to the lid member 31. In the direction along the drain axis O, the positions of the drain port 34a and the collar portion 72 generally coincide.

The opening 34b of the droplet portion 34 is located below the drain port 34a and has a constant diameter, and the opening diameter of the opening 34b is indicated as R1 (see FIG. 6). Further, the area of the opening 34b having an opening diameter of R1 is defined as the opening area of the droplet portion 34. Note that the opening diameter R1 corresponds to the inner diameter of the cylindrical portion 71, and the opening area of the droplet portion 34 corresponds to the area whose diameter is the inner diameter of the cylindrical portion 71. Moreover, the diameter gradually increases from the opening 34b toward the drain port 34a due to the connecting portion 32a.

Also, in this embodiment. Since the drain axis O, which is the central axis of the siphon drain member 30, coincides with the vertical direction, the area of the lid member 31 and the opening area of the droplet 34 are the projection of the lid member 31 on a plane perpendicular to the vertical direction. This corresponds to the area and the projected area of the opening of the droplet portion 34. In this embodiment, the outer diameter of the lid member 31 and the outer diameter of the flange 72 are formed to be substantially the same.

The siphon drain member 30 is arranged, for example, by inserting the cylindrical portion 71 into the pipe 90 from above.

As shown in FIGS. 4 and 5, a portion formed between the outer circumferential edge 31a of the lid member 31 and the outer circumferential edge 72a of the collar portion 72 is an inflow opening through which rainwater flows into the drain port 34a of the droplet portion 34. 30a (see arrow B in FIG. 5). The size and height shape of the lid member 31 are adjusted so that the area of the inflow opening 30a is larger than the opening area (portion with diameter R1) of the opening 34b of the droplet portion 34.

As shown in FIG. 5, the plurality of vertical ribs 33 connect the upper surface 72d of the flange portion 72 of the mounting tube 32 and the outer peripheral portion of the lower surface 31c of the lid member 31. The lid member 31 is supported from below by a plurality of vertical ribs 33, and is supported at a position at a predetermined height H1 from the mounting tube 32, as shown in FIG. The plurality of vertical ribs 33 are provided in the inflow opening 30a, are formed along the radial direction in plan view, and are formed to intersect with the circumferential direction. The vertical ribs 33 have a function of rectifying rainwater flowing into the droplet 34 from the inflow opening 30a. In this embodiment, six vertical ribs 33 are formed, and the six vertical ribs 33 are provided at equal intervals (approximately 60 degree intervals) around the drain axis O. It is not limited.

The lid member 31 is arranged so as to close the opening 34b of the droplet portion 34 when viewed from above in the vertical direction. Further, the area of the lid member 31 is set to be larger than the opening area (portion of diameter R1) of the opening 34b of the droplet portion 34. Note that in this embodiment, the center of the lid member 31 and the center of the opening of the droplet portion 34 are aligned in the vertical direction, but in the case where the lid member 31 and the droplet portion 34 are both tilted and disposed diagonally. If the lid area of the lid member 31 is the same as the opening area of the droplet part 34, the opening 34b of the droplet part 34 cannot be closed when viewed from the vertical direction, and the lid member 31 and the droplet part 34 cannot be closed. A gap (an air core caused by the eddy current) is created between the two.

Therefore, it is preferable that the projected area of the lid member 31 with respect to a plane perpendicular to the vertical direction be set larger than the projected area of the opening 34b of the droplet portion 34.

The lid diameter R2 or the minimum width dimension of the lid member 31 is larger than the opening diameter R1 of the droplet portion 34 (the diameter R1 of the opening 34b) and is 245% or less of the opening diameter R1. Furthermore, when the height from the outer peripheral edge 72a of the flange 72 of the lid member 31 is H1, and the opening diameter is R1, the value of R1/H1 satisfies the range of 1.3 to 8.0, and H1 is 10 It is preferable that the opening area satisfies the range of ˜60 mm and the opening area is 30 cm 2 or more and 190 cm 2 or less.

Note that the upper surface 31b of the lid member 31 is provided with gripping ribs 35 that protrude upward and are arranged at intervals in the circumferential direction. The gripping rib 35 is gripped by an operator when connecting the siphon drain member 30 to the pipe 90.

(Position of siphon drain member in drainage basin)
Next, the position of the siphon drain member 30 inside the drainage basin section 20 will be described.

The siphon drain member 30 is arranged inside the drainage basin part 20 so that its drain axis O coincides with the central axis of the cylindrical part 53a of the throttle part 53.

In this embodiment, as shown in FIG. 2, the drain port 34a of the siphon drain member 30 is arranged below the throttle upper part 53c (indicated by position P1) of the throttle part 53. In addition, the height from the drain port 34a to the siphon drain member 30 is shown by H1 in FIG. 2, and the height from the drain port 34a to the throttle upper part 53c is shown by H2 in FIG. Here, 0≦H2≦H1, R1≦r, and r−R2≦100 mm are satisfied.

When rainwater is drained by the drainage system 1, the rainwater flowing from the metal lid 10 along the connecting part 54 passes through the inlet opening 30a of the siphon drain member 30 and flows into the drain port 34a. At this time, since the drain port 34a is arranged below the throttle upper part 53c (indicated by position P1) of the throttle section 53, foreign matter (such as dirt) as well as rainwater is drained through the inflow opening 30a of the siphon drain member 30. It flows into the mouth 34a.

Since rainwater is vigorously discharged by the siphon drain member 30, foreign matter is discharged without remaining in the pipe 90, and clogging of the pipe 90 can be suppressed.

In addition, since the siphon phenomenon induced by the siphon drain member 30 results in a high discharge flow rate, rainwater can be efficiently drained even with a thin pipe.

Further, in the present embodiment, the siphon drain member 30 is arranged such that the grip rib 35 is located above the aperture upper part 53c (indicated by position P1) where the drain port 34a is the upper end of the aperture part 53. Thereby, it is not necessary to insert a hand into a narrow place such as the constriction part 53 to grasp the gripping rib 35, and it becomes easier to connect the siphon drain member 30 and the pipe 90.

(Example)
Next, the drainage system of this embodiment will be explained using an example.

FIG. 7 is a diagram for explaining the configuration of the drainage system 1 of this embodiment. FIG. 8 is a diagram showing an example of the pipe connection structure 80 of the drainage system 1 of this embodiment. FIG. 9(a) is an exploded view of the piping connection structure 80 of FIG. 8. FIG. 10 is a diagram showing the configuration of a drainage system 1000 of a comparative example. The drainage system 1000 of the comparative example is different from the drainage system 1 of the example in that the siphon drain member 30 is not provided and the position of the drainage port is the same as the bottom surface 83a described later.

In this embodiment, a lower cell 22' is used, and the metal lid 10 and upper cell 21 are not provided. Furthermore, as shown in FIG. 7, the constricted part 53' of the lower cell 22' is different from the constricted part 53 of the above embodiment in that it is not provided with a bottom surface 53b but only has a cylindrical part 53a'.

As shown in FIG. 7, an elbow joint 91 is connected to the lower end of the pipe 90, and a pipe 92 is connected to the elbow joint 91. The pipe 92 has no slope and extends from the elbow joint 91 in the horizontal direction. An elbow joint 93 is connected to the other end of the pipe 92, and a pipe 94 is connected to the elbow joint 93. Piping 94 extends downward from elbow joint 93. An elbow joint 95 is arranged at the lower end of the pipe 94, and a pipe 96 is connected to the elbow joint 95. The pipe 96 extends horizontally from the elbow joint 95 without any slope. An elbow joint 97 is connected to the other end of the pipe 96, and the other end of the elbow joint 97 faces downward and is connected to a drainage basin.

Further, the length of the long side of the lower cell 22' is set to 500 mm, the length of the pipe 90 is set to 500 mm, the length of the pipe 92 is set to 5000 mm, and the length of the pipe 94 is set to 5000 mm. , the length of the pipe 96 is set to 1500 mm.

Further, the diameter r of the constriction portion 53 is set to 190 mm, and the diameter R2 of the siphon drain member 30 is set to 130 mm.

The piping connection structure 80 of this embodiment includes a cap 83, a socket 84, and a pipe 85, as shown in FIGS. 8 and 9(a). The socket 84 is a joint for a vinyl chloride pipe, into which the cylindrical portion 71 of the siphon drain member 30 is inserted from above.

The cap 83 is a joint for a vinyl chloride pipe. FIG. 9(b) is a perspective view of the cap 83 viewed from the bottom side. The cap 83 is arranged such that the lower end of the cylindrical portion 53a' of the constricted portion 53' is inserted inside the cap 83. As shown in the figure, the cap 83 has a hole 83b having an outer diameter of the cylindrical portion 71 of the siphon drain member 30 plus 1 mm at the center of the bottom surface 83a. The cylindrical portion 71 of the siphon drain member 30 is inserted into the hole 83b. In addition, in this embodiment, the bottom surface 83a of the cap 83 corresponds to the bottom surface 53b of the constriction part 53 in FIG. 2, and forms a water stop surface. Further, the hole 83b corresponds to the through hole 53d in FIG.

The socket 84 is arranged to both position and support the cap 83. Pipe 85 is a vinyl chloride pipe, and is inserted into socket 84 from below. The socket 84 and the pipe 85 constitute the piping 90 described above. Further, the cap 83 is included in the drainage basin section together with the lower basin 22'.

As shown in FIG. 8, the tube 85 is fixed by a U band 87 and an angle 86 so as not to come off. Furthermore, a silicone sealant (manufactured by Sekisui Chemical Co., Ltd.) 88 is applied over the entire circumference between the upper end of the cap 83 and the constricted portion 53' to seal it. Further, a silicon sealant (manufactured by Sekisui Chemical Co., Ltd.) 89 is applied over the entire circumference between the socket 84 and the cap 83 to seal it.

Moreover, as shown in FIG. 8, the height from the drain port 34a of the siphon drain member 30 to the throttle upper part 53c' of the throttle part 53' is set to H2. The height of H2 can be changed by changing the length of the constricted portion 53'.

In Examples 1 and 2 and Comparative Examples 1 to 3, the sizes of the pipe 85 of the pipe 90 and the pipes 92, 94, and 96, the presence or absence of the siphon drain member 30, and the position of the drain port 34a from the throttle top 53c were changed, In each configuration, we confirmed whether siphon phenomenon occurred and measured the maximum flow rate that can be drained. In addition, in each of the configurations of Examples 1 and 2 and Comparative Examples 1 to 3, three stones with a diameter of approximately 3 cm were introduced at an inflow rate of 10 L/s, and it was measured whether the stones could be discharged to evaluate the transportability. The amount discharged when 50 g was put into the lower cell 22' was measured.

FIG. 11 is a diagram showing a table of the results of Examples 1 and 2 and Comparative Examples 1 to 3. Regarding the transportability, the case where three stones could be ejected was indicated as ejectable (◯), and the case where it could not be ejected was indicated as ejectable (x).

In the first embodiment, the size of the pipe 85 of the pipe 90 and the pipes 92, 94, and 96 is set to 75A, the height H1 from the drain port 34a of the siphon drain member 30 to the lid member 31 is set to 50 mm, and the aperture upper part 53c' H2 from the drain port 34a to the drain port 34a was set to 15 mm. At this time, a siphon phenomenon occurred, the drainage flow rate was 20 L/s, and 47 g of foreign matter was discharged from the elbow joint 97. Also, I was able to eject the three stones that were thrown in.

In Example 2, the size of the pipe 85 of the pipe 90 and the pipes 92, 94, and 96 was 100A, the height H1 was set to 50 mm, and the height H2 was set to 10 mm. At this time, a siphon phenomenon occurred, the drainage flow rate was 30 L/s, and 45 g of foreign matter was discharged from the elbow joint 97. Also, I was able to eject the three stones that were thrown in.

In Comparative Example 1, the size of the pipe 85 of the pipe 90 and the pipes 92, 94, and 96 is 75A, and the position of the drain port (the position of the upper end 84a of the socket 84) is set to the bottom surface 83a of the cap 83 (the lower part of the throttle part 53'). ). At this time, a vortex was generated, no siphon phenomenon occurred, the drainage flow rate was 13 L/s, and 30 g of foreign matter was discharged from the elbow joint 97. Also, the three stones that were thrown in could not be ejected.

In Comparative Example 2, the size of the pipe 85 of the pipe 90 and the pipes 92, 94, and 96 is 100A, and the position of the drain port (the position of the upper end 84a of the socket 84) is set to the bottom surface 83a of the cap 83 (the lower part of the throttle part 53'). ). At this time, a vortex was generated, no siphon phenomenon occurred, the drainage flow rate was 18 L/s, and 35 g of foreign matter was discharged from the elbow joint 97. Also, the three stones that were thrown in could not be ejected.

In Comparative Example 3, the size of the pipe 85 of the pipe 90 and the pipes 92, 94, and 96 is 200A, and the position of the drain port (the position of the upper end 84a of the socket 84) is set to the bottom surface 83a of the cap 83 (the lower part of the throttle part 53'). ). At this time, a vortex was generated, no siphon phenomenon occurred, the drainage flow rate was 70 L/s, and 28 g of foreign matter was discharged from the elbow joint 97. Also, the three stones that were thrown in could not be ejected.

As described above, the siphon phenomenon can be caused by arranging the siphon drain member 30. Further, by generating a siphon phenomenon, a high drainage flow rate can be achieved even when the pipe diameter is small.

Furthermore, due to the occurrence of the siphon phenomenon, the three stones that were thrown in could be discharged, and of the 50g of earth and sand, 47g could be discharged in Example 1, and 45g could be discharged in Example 2. In this way, compared to the comparative example, in this example, most of the foreign matter thrown in can be discharged from the piping, so clogging in the piping can be suppressed.

(Features, etc.)
(1)
The drainage system 1 of this embodiment includes a metal lid 10, a drainage basin section 20, and a siphon drain member 30 (an example of a drainage member). The drainage basin portion 20 has an opening 20a in which the metal lid 10 is placed. The siphon drain member 30 has a lid member 31 and a drain port 34a, and is arranged inside the drainage basin portion 20 to induce the occurrence of a siphon phenomenon in water drained by a pipe 90 connected to the drain port 34a. do. The drain port 34a is formed facing the lid member 31.

By providing the siphon drain member 30 in this manner, high flow rate drainage can be realized from the pipe 90 connected to the siphon drain member 30.

In addition, it is possible to generate a siphon phenomenon and realize high flow rate drainage with a small diameter. Therefore, it is possible to use piping with a smaller diameter than in the past, which reduces weight and improves work efficiency, and because less material is required, costs can also be reduced.

(2)
In the drainage system of this embodiment, the drainage basin section 20 further includes a constriction section 53. The aperture portions 53 and 53' are arranged below the opening 20a and have a smaller area than the opening 20a. The drain port 34a is arranged below the throttle upper parts 53c, 53c' (an example of the upper end of the throttle part).

In this manner, by arranging the drain port 34a below the throttle upper part 53c, foreign matter can be discharged through the siphon drain member 30 together with the water flowing from the opening 20a toward the throttle part 53.

In addition, since the water is drained at a high flow rate by the siphon drain member 30, the foreign matter can be forced to flow through the pipe, and as much of the foreign matter as possible can be drained out of the pipe. Therefore, it is possible to reduce the amount of foreign matter remaining in the piping and to reduce the occurrence of clogging.

(3)
In the drainage system 1 of this embodiment, the siphon drain member 30 (an example of a drainage member) has an opening 34b to the pipe 90, and the opening 34b is connected to the drain port 34a. The diameter of the throttle parts 53, 53' is r, the diameter of the siphon drain member 30 is R2 (an example of R), the diameter of the opening 34b is R1, the height from the drain port 34a to the lid member 31 is H1, If the height from the drain port 34a to the throttle upper part 53c (an example of the upper end part) of the throttle part 53 is H2,
0≦H2≦H1, R1≦r and r-R2≦100mm are satisfied.

As a result, foreign matter is drained by the drainage member in the range of 0≦H2≦H1. By setting R1≦r, drainage can flow in without resistance, and when r-R2 is larger than 100 mm, that is, when r is too large with respect to R2, foreign matter is not sucked into the siphon drain member 30 and flows into the constriction part. However, by setting r-R2≦100 mm, the foreign matter can be discharged without being accumulated in the constriction portion 53.

(4)
In the drainage system 1 of the present embodiment, the height from the drain port 34a to the lid member 31 is H1, and the height from the drain port 34a to the throttle tops 53c, 53c' (an example of the top end of the throttle section) is H2. The diameter of the throttle parts 53, 53' is r, the diameter of the siphon drain member 30 is R2, the height from the drain port 34a to the lid member 31 is H1, and the upper part 53c of the throttle part 53 from the drain port 34a is If the height to (an example of the upper end) is H2,
In the range of H1<H2, 20mm≦r-R2≦100mm is satisfied.

Thereby, foreign matter can be efficiently discharged through the siphon drain member 30 together with the water flowing from the opening 20a toward the constriction part 53.
If r-R2 is smaller than 20 mm, there will be resistance to the inflow of waste water, making it impossible to obtain a high amount of waste water, and the effect of the present invention will be greatly reduced. Furthermore, if r is larger than 100 mm, that is, if r is too large with respect to R2, foreign matter will not be sucked into the siphon drain member 30 and will accumulate in the constriction part 53, but it is necessary to set r-R2≦100 mm. Accordingly, foreign matter can be discharged without accumulating in the constriction portion 53.

(5)
In the drainage system 1 of this embodiment, the drainage basin section 20 includes a lower basin 22 and an upper basin 21. The lower cells 22, 22' have constricted portions 53, 53'. The upper cell 21 has an opening 20a and is arranged above the lower cells 22, 22'.

Thereby, the drainage basin section 20 can be formed by at least two members, the upper basin 21 and the lower basin 22. Further, the materials of the upper cell 21 and the lower cell 22 can be changed; for example, the upper cell 21 can be made of metal and the lower cell 22 can be made of FRP (Fiber Reinforced Plastics).

(6)
In the drainage system 1 of this embodiment, the throttle part 53 has a bottom surface 53b that forms a water-stop surface.

Thereby, rainwater can be stopped by the bottom surface 53b of the constriction part 53 of the drainage basin part 20.

(7)
In the drainage system 1 of this embodiment, the constricted portion 53' has a cylindrical shape extending downward. The drainage basin section 20 has a cap 83 (an example of a water-stopping member) that covers the tip of the constriction section 53'. The cap 83 forms a water stop surface.
Such a cap 83 forms a water stop surface and can stop rainwater.

(8)
In the drainage system 1 of the present embodiment, the drainage basin section 20 is formed such that the area perpendicular to the opening section 20a gradually decreases from the opening section 20a toward the constricted sections 53 and 53'.

Thereby, the rainwater that has flowed into the opening 20a can flow into the throttle part 53 with force.

(9)
In the drainage system 1 of this embodiment, a pipe 90 connected to the drain port 34a of the siphon drain member 30 passes through the bottom surfaces 53b and 83a (an example of a water-stop surface).
As a result, water is stopped by the water stop surface around the pipe 90.

(10)
In the drainage system 1 of this embodiment, the siphon drain member 30 has an opening 34b to the pipe 90, and the opening 34b is connected to the drain port 34a. The lid member 31 is arranged to close the opening 34b when viewed from above in the vertical direction, and the projected area of the lid member 31 with respect to a plane perpendicular to the vertical direction is set to be larger than the projected area of the opening 34b.

Thereby, even when the siphon drain member 30 is disposed diagonally, the siphon phenomenon can be generated.

(11)
The drainage system 1 of this embodiment is provided in a side gutter of a bridge 200.
Thereby, rainwater that has fallen on the bridge 200 can be efficiently drained.

[Other embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the invention.

(A)
In the embodiment described above, the aperture part 53 is provided in the lower cell 22, but the aperture part 53 may not be provided. FIG. 12 is a diagram showing a drainage system 101 using a drainage basin section 120 including a lower basin 122 in which a constriction section 53 is not formed. The bottom surface 122a of the lower cell 122 is formed to have a smaller area than the opening 20a. The drain port 34a is arranged at approximately the same position in the height direction as the bottom surface 122a. Further, the bottom surface 122a corresponds to a water stop surface of the drainage basin section 120.

In this manner, by arranging the drain port 34a at approximately the same position as the bottom surface 122a, not only the water flowing from the opening 20a toward the bottom surface 122a and drained by the siphon drain member 30 but also foreign matter can be removed through the siphon drain member 30. Can be discharged.

Further, when a siphon phenomenon occurs due to the siphon drain member 30, the foreign matter can be forced to flow through the pipe 90, so that as much of the foreign matter as possible can be discharged outside the pipe 90. Therefore, it is possible to reduce the amount of foreign matter remaining in the pipe 90 and reduce the occurrence of clogging.

Further, the drainage basin portion 120 is formed such that the area perpendicular to the opening 20a gradually decreases from the opening 20a toward the bottom surface 122a.

This allows rainwater that has flowed into the opening 20a to flow forcefully toward the bottom surface 122a.

Although the siphon drain member 30 is arranged inside the drainage basin parts 20 and 120, a part of the siphon drain member 30 may protrude from the drainage basin parts 20 and 120. To explain specifically using FIG. 12, in FIG. 12, the cylindrical portion 71 of the siphon drain member 30 protrudes from the outer surface of the bottom surface 122a of the drainage basin portion 120.

(B)
In the embodiment described above, the drain port 34a is located below the throttle upper part 53c (an example of the upper end of the throttle section), but as shown in FIG. It may be placed in

Even with such a configuration, foreign matter can be discharged through the siphon drain member 30 together with the water that flows from the opening 20 a toward the constriction portion 53 and is drained by the siphon drain member 30 .

(C)
In the above embodiment and other embodiments (B), the drain port 34a is located at the same level as the throttle top 53c or below the throttle top 53c, but the drain port 34a is not limited to this. may also be placed above. In this case, although it becomes difficult for foreign matter to flow into the siphon drain member 30, a siphon phenomenon can be induced in the drainage of the pipe connected to the drain port 34a, so that drainage at a high flow rate can be achieved with a small diameter.

(D)
In the above embodiment, the drainage basin section 20 is divided into the upper basin 21 and the lower basin 22, but the upper basin 21 and the lower basin 22 may be integrally configured. In this case, the height adjustment section 23 may not be provided. For example, the structure may be such that the metal lid 10 is placed directly on the lower cell 22 in FIG.

(E)
In the above embodiment, the upper cell 21 is made of metal and the lower cell 22 is made of FRP, but the present invention is not limited to this. The upper cell 21 may be made of FRP, and the lower cell 22 may be made of metal.

(F)
In the embodiment described above, the cylindrical portion 71 is inserted into the pipe 90, and in the example, the siphon drain member 30 is inserted into the socket 84, but the present invention is not limited to this. For example, a male thread is formed on the outer periphery of the cylindrical portion 71, and a female thread is formed on the inside of the upper end member (for example, the socket 84) of the piping 90, and the cylindrical portion 71 and the piping 90 are screwed together by the male thread and the female thread. may be connected. Further, the cylindrical portion 71 and the pipe 90 may be connected with adhesive or the like.

The drainage system of the present invention has the effect of realizing high-flow drainage with a small diameter, and is useful as a rainwater drainage system placed on a bridge or the like.

1: Drainage system 10: Metal lid 20: Drainage basin 20a: Opening 30: Siphon drain member
34a: Drain port 53b: Bottom

Claims (10)

metal lid and
a drainage basin portion having an opening in which the metal lid is placed;
Water that has a drain port and a plurality of vertical ribs formed upward from the periphery of the drain port, is disposed inside the drain basin , and is drained by a pipe connected to the drain port. a drainage member that induces the occurrence of a siphon phenomenon;
In plan view, each of the plurality of vertical ribs is formed along the radial direction of the drain port, and the plurality of vertical ribs are formed to intersect with the circumferential direction of the periphery of the drain port. ,
Water flowing into the drainage basin from the opening flows between the adjacent vertical ribs and flows into the drainage port,
The drainage basin section is
further comprising a diaphragm portion disposed below the opening and having a smaller area than the opening;
The drain port is located at the same level as the upper end of the throttle part or below the upper end of the throttle part,
The throttle part has a bottom surface forming a water stop surface,
The drain port is located above the water stop surface,
drainage system. metal lid and
a drainage basin portion having an opening in which the metal lid is placed;
Water that has a drain port and a plurality of vertical ribs formed upward from the periphery of the drain port, is disposed inside the drain basin , and is drained by a pipe connected to the drain port. a drainage member that induces the occurrence of a siphon phenomenon;
In plan view, each of the plurality of vertical ribs is formed along the radial direction of the drain port, and the plurality of vertical ribs are formed to intersect with the circumferential direction of the periphery of the drain port. ,
Water flowing into the drainage basin from the opening flows between the adjacent vertical ribs and flows into the drainage port,
The drainage basin section is
further comprising a diaphragm portion disposed below the opening and having a smaller area than the opening;
The drain port is located at the same level as the upper end of the throttle part or below the upper end of the throttle part,
The throttle part has a cylindrical shape extending downward,
The drainage basin part has a water stop member that covers the tip of the constriction part,
The water stop member forms a water stop surface,
The drain port is located above the water stop surface,
drainage system. The drainage member further includes a cylindrical portion in which the drain port is formed at an upper end, and a flange portion extending radially outward from the upper end of the cylindrical portion in the radial direction of the drain port in the plan view,
The plurality of vertical ribs are arranged on the collar portion,
A drainage system according to claim 1 or 2. The drainage member is
a lid member formed to face the drain port and supported from below by the vertical ribs;
an opening to the piping;
The opening is located below the drain port and is connected to the drain port,
The diameter of the constriction part is r, the diameter of the drainage member is R2, the diameter of the opening is R1, the height from the drain port to the lid member is H1, and the upper end of the constriction part from the drain port. If the height to the part is H2,
0≦H2≦H1, R1≦r and r-R2≦100mm,
A drainage system according to claim 1 or 2. The drainage member has a lid member formed opposite to the drainage port and supported from below by the vertical ribs,
The diameter of the throttle part is r, the diameter of the drain member is R2, the height from the drain port to the lid member is H1, and the height from the drain port to the upper end of the throttle part is H2. Then,
In the range of H1<H2, satisfy 20mm≦r-R2≦100mm,
A drainage system according to claim 1 or 2. The drainage basin section is
a lower cell having the constriction part;
an upper cell having the opening and disposed above the lower cell;
A drainage system according to claim 1 or 2. The drainage basin portion is formed such that an area perpendicular to the opening portion gradually decreases from the opening portion toward the constriction portion.
A drainage system according to claim 1 or 2. A pipe connected to the drain port of the drainage member passes through the water stop surface.
A drainage system according to claim 1 or 2. The drainage member is
a lid member formed to face the drain port and supported from below by the vertical ribs;
an opening to the piping;
The opening is located below the drain port and is connected to the drain port,
The lid member is arranged to close the opening when viewed from above in the vertical direction, and a projected area of the lid member with respect to a plane orthogonal to the vertical direction is set to be larger than a projected area of the opening.
A drainage system according to any one of claims 1 to 3 and 6 to 8. The drainage system is provided in a gutter of a bridge,
Drainage system according to any one of claims 1 to 9.

Images