JP7680334B2 - Piping structure - Google Patents

Description

The present invention relates to a piping structure.

The following Patent Document 1 describes a siphon drainage system that uses a siphon force to drain wastewater discharged from a water-related fixture and stored in a temporary storage tank.

JP 2011-256557 A

In a siphon drainage system equipped with a temporary storage tank as in Patent Document 1 above, dirt tends to accumulate in the area where wastewater flows out from the temporary storage tank into the siphon drain pipe (outflow area). Generally, a cleaning port for cleaning is provided at the top of the temporary storage tank, but it may be difficult to form the cleaning port close to the outflow area due to the floor structure, installed objects, etc.

In view of the above, the present invention aims to provide a piping structure that allows easy cleaning of the drainage outflow section from the temporary storage tank.

The piping structure of the first aspect includes a temporary storage tank that stores wastewater discharged from a plumbing fixture, a horizontal pipe that is connected to the temporary storage tank via an outlet and discharges the wastewater stored in the temporary storage tank laterally, a vertical pipe that generates a siphon force in the horizontal pipe by causing the wastewater from the horizontal pipe to flow downward, an air supply section that is connected to the vertical upper part of the outlet and supplies air to the horizontal pipe, an opening formed in the air supply section, and a core member that is arranged in the air supply section so that it can be extracted from the opening, makes the flow path cross-sectional area of the lower part of the air supply section smaller than the cross-sectional area of the opening, and forms an air supply path through which air can pass.

In the piping structure of the first embodiment, the air supply section is connected to the outlet section that is connected to the horizontal pipe, and an opening is formed in the air supply section, so that the outlet section and the vicinity of the outlet section of the temporary storage tank can be easily accessed from the opening for cleaning.

In addition, the cross-sectional area of the flow path at the bottom of the air intake section is reduced, and the core member that configures the air intake passage is located inside the air intake section, so the diameter of the air intake section can be increased to allow for easier cleaning, while the core member reduces the area where the intake air stagnates, reducing abnormal noises during drainage caused by stagnant air.

In the second embodiment of the piping structure, the lower end of the core member is positioned at a position corresponding to the upper end of the horizontal pipe.

The piping structure of the second aspect makes it difficult for air to become trapped between the lower end of the core member and the upper end of the horizontal pipe, reducing abnormal noises during drainage caused by trapped air.

In the third embodiment of the piping structure, a flat drainage surface is formed at the lower end of the core member, extending from the upper end of the outlet portion to the upper end of the horizontal pipe.

According to the third aspect of the piping structure, the flat drainage surface allows the drainage water to be smoothly guided from the temporary storage tank to the horizontal pipe.

In the fourth embodiment of the piping structure, a branching section is formed in the outlet section, which branches the wastewater discharged from the temporary storage tank from a single flow path into multiple flow paths, the horizontal pipe is connected to each of the multiple flow paths branched at the branching section, and the air supply section is connected to the branching section to supply air to the branching section.

According to the piping structure of the fourth aspect, drainage from the temporary storage tank can be promoted by directing the drainage water from the temporary storage tank to multiple horizontal pipes.

The piping structure of the fifth aspect includes an air vent pipe that is connected to the temporary storage tank and supplies air to the temporary storage tank, and the air supply unit is connected to the air vent pipe.

In the piping structure of the fifth aspect, the vent pipe connected to the temporary storage tank is connected to the air supply section, so that when the water level in the temporary storage tank is high, wastewater from the temporary storage tank can be discharged into the horizontal pipe via the air supply section.

The piping structure of the present invention makes it easy to clean the area where wastewater flows out from the temporary storage tank.

1 is a side view showing a piping structure according to an embodiment of the present invention. 1 is a perspective view showing a piping structure according to an embodiment of the present invention. FIG. 2 is a perspective view showing the vicinity of a branch joint of the piping structure according to the embodiment of the present invention. 6 is a cross-sectional view taken along line BB in FIG. 5. 4 is a cross-sectional view taken along line AA in FIG. 3. FIG. 2 is a perspective view of a core member according to an embodiment of the present invention. 10A and 10B are plan views showing the vicinity of a branch joint of a piping structure according to modified examples (A) and (B) of an embodiment of the present invention.

The piping structure according to an embodiment of the present invention will be described below with reference to the drawings. Components indicated with the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and there may be multiple components.

In addition, explanations of configurations and symbols that are duplicated in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and may be implemented with appropriate modifications, such as omitting configurations or replacing them with different configurations, within the scope of the purpose of the present invention.

In the figure, arrow Z indicates the vertical upward direction, and arrows X and Y indicate directions perpendicular to each other in the horizontal direction.

<Piping structure>
(Siphon drainage system)
1 shows an outline of a piping structure 20 according to this embodiment. The piping structure 20 is a siphon drainage system structure that utilizes siphon force to discharge wastewater from a plumbing fixture 12. The piping structure 20 is used, as an example, in an apartment building 10 that is formed to have multiple floors.

The piping structure 20 is equipped with a drainage standpipe 22 that drains wastewater downward. The drainage standpipe 22 extends in the up-down direction (vertical direction) and penetrates the slab 14 of each floor of the apartment building 10. In addition, multiple drainage standpipes 22 are provided at different locations on the floor of the apartment building 10. The drainage standpipes 22 are housed, for example, in a piping space (also called a pipe space, etc.) that is partitioned by walls from each residence on each floor of the apartment building 10.

Each dwelling unit in the apartment complex 10 is provided with a plumbing fixture 12. The plumbing fixture 12 is, for example, a bathroom unit, and is formed by integrating a bathtub 12A and a washing area 12B. One end of a drainage inlet pipe 24 is connected to the plumbing fixture 12.

The other end of the wastewater inlet pipe 24 is connected to the temporary storage tank 30, which will be described later. As a result, the wastewater inlet pipe 24 introduces wastewater discharged from the bathtub 12A and the washing area 12B of the plumbing fixtures 12 into the temporary storage tank 30. It is preferable that the wastewater inlet pipe 24 is arranged with a slope so that the temporary storage tank 30 side is lower.

The temporary storage tank 30 is capable of temporarily storing wastewater from the plumbing fixtures 12 and is formed in a roughly rectangular parallelepiped shape. An inlet section 30A is formed in one side wall of the temporary storage tank 30, and the other end of the wastewater introduction pipe 24 is connected to it. A protruding section 30B is formed in the lower part of the other side wall that faces the one side wall of the temporary storage tank 30. The inlet section 30A is shaped so that the side where the wastewater introduction pipe 24 is connected is concave.

The protruding portion 30B is connected to a branch joint 60 as an outflow portion, which will be described later, and the siphon drain pipe 40 is connected via the branch joint 60. The protruding portion 30B is convex and protrudes toward the side to which the branch joint 60 is connected, and an outflow opening 30C that is a horizontally long hole is formed at the tip. The temporary storage tank 30 is formed of a resin material, such as polyvinyl chloride.

An inspection hatch 32 is formed in the ceiling wall of the temporary storage tank 30, and the inspection hatch 32 is closed with a lid 34.

(Branch joint)
3 and 4, the branch joint 60 has a single flow path section 62 and a multiple flow path section 64. The single flow path section 62 extends from the protruding portion 30B, and within the single flow path section 62, there are formed one single flow path 63A that is continuous with the outflow opening 30C, and a single space 63B whose diameter is expanded in the horizontal direction perpendicular to the single flow path 63A from the single flow path 63A.

The multi-channel section 64 protrudes in parallel from the single-channel section 62 in the same direction as the single-channel section 62, and inside, two branch channels 65 are formed that are arranged parallel to each other along the outer shape of the multi-channel section 64. Each branch channel 65 is continuous with the single space 63B and is connected to a horizontal pipe 42, which will be described later. As shown in FIG. 5, the inner diameter of the single channel 63A is larger than the inner diameter of the horizontal pipe 42, the lower end of the single channel 63A is positioned at approximately the same height as the lower end of the horizontal pipe 42, and the upper end of the single channel 63A is positioned higher than the upper end of the horizontal pipe 42.

The upper part of the single passage section 62 is formed with an air supply connection section 61 as an air supply section. The air supply connection section 61 is generally cylindrical, and has a communication passage 61A formed inside that communicates with the single space 63B from above. The upper end of the air supply connection section 61 is formed with an inspection opening 61B that opens upward from the communication passage 61A. The inspection opening 61B is closed with a lid 61D. In addition, a connection opening 61C that opens from the communication passage 61A to the ventilation pipe 50 side is formed at the upper part of the side of the air supply connection section 61. An air supply pipe 66 is connected to the connection opening 61C.

(Core member)
A core member 70 is disposed within the air supply connection 61. As shown in Fig. 6, the core member 70 is generally cylindrical and has a main body 72 and a locking portion 74. The locking portion 74 is annular, constitutes the upper end of the core member 70, and is locked to an inner circumferential wall that forms the inspection opening 61B of the air supply connection 61. The core member 70 can be removed from the inspection opening 61B to the communicating flow passage 61A within the air supply connection 61.

The main body 72 extends downward from the locking portion 74 and is disposed in the communication flow path 61A. An air intake inlet space 72A and an air intake flow path space 72B are formed on the side of the main body 72 as an example of an air intake path. As shown in FIG. 4, the air intake inlet space 72A is formed so that the main body 72 is concave at a position corresponding to the connection opening 61C of the air intake connection portion 61. The air intake flow path space 72B is formed so that the main body 72 is concave on the side of the horizontal pipe 42 rotated 90° from the air intake inlet space 72A when viewed from above. The air intake inlet space 72A is formed at a height portion corresponding to the connection opening 61C in the vertical direction (Z direction), and the air intake flow path space 72B is formed from the same position as the upper end of the air intake inlet space 72A to the lower end in the vertical direction (Z direction) and is communicated with the air intake inlet space 72A.

The side of the main body 72 where the air supply inlet space 72A and the air supply flow path space 72B are not formed is shaped to conform to the inner wall of the air supply connection 61. As shown in FIG. 5, the lower end (bottom surface) of the main body 72 slopes obliquely downward from the upper end of the single flow path 63 of the branch joint 60 toward the upper end of the branch flow path 65, forming a flat drainage surface 76. Here, the "upper end" can also be referred to as the "ceiling portion" of each flow path. The "flat drainage surface" can also be referred to as the "sloping drainage surface" or the "sloping ceiling surface".

When the core member 70 is placed in the communication passage 61A, the main body 72 is placed on the upstream side (left side in FIG. 5) in the direction of drainage flow inside the air intake connection 61. Therefore, the cross-sectional area of the air intake passage space 72B, which is the part where air flows at the bottom of the communication passage 61A, is smaller than the opening area of the inspection opening 61B. In this embodiment, the cross-sectional area of the lower end of the communication passage 61A is the opening area of the air intake passage space 72B to the single passage 63, which is the opening S.

The connection opening 61C is connected to a connection port 67A on one end of the air supply pipe 66. The connection port 67B on the other end of the air supply pipe 66 is connected to the ventilation pipe 50.

(Siphon drain pipe)
As shown in FIG. 2, the siphon drain pipe 40 includes a plurality of (two in this embodiment) horizontal pipes 42 arranged along the slab 14, a junction horizontal pipe 44, a vertical pipe 46, and a lateral junction joint member 48.

The horizontal pipe 42 discharges wastewater discharged from the plumbing fixtures 12 horizontally through multiple flow paths. The horizontal pipe 42 is formed, for example, from a polybutene pipe with a nominal diameter of 25J (inner diameter of approximately 28mm) and is arranged without gradient along the horizontal direction on the slab 14. Note that "without gradient" here does not have to be strictly horizontal, but includes some steps or gradients along the slab 14.

The "upstream" ends of the two horizontal pipes 42 are connected to the branch flow paths 65 of the branch joint 60. The "downstream" ends of the two horizontal pipes 42 are connected to one junction horizontal pipe 44 via a horizontal junction joint member 48. The junction horizontal pipe 44 is a horizontal pipe that discharges wastewater introduced from the two horizontal pipes 42 in the horizontal direction. The junction horizontal pipe 44 and the horizontal junction joint member 48 may be integrally configured.

The total cross-sectional area of the two horizontal pipes 42 is preferably less than the cross-sectional area of the wastewater inlet pipe 24. The cross-sectional area of the merging horizontal pipe 44 is preferably less than the total cross-sectional area of the two horizontal pipes 42. The cross-sectional areas of the merging horizontal pipe 44 and the horizontal pipe 42 are set in consideration of the amount of wastewater discharged from the wastewater inlet pipe 24 so that the wastewater flows through the pipes at full flow as necessary.

As shown in Figures 1 and 2, a junction horizontal pipe 44 is connected to the upstream side of the vertical pipe 46. The vertical pipe 46 is arranged in the up-down direction (vertical direction) along the drainage standpipe 22, and generates a siphon force in the horizontal pipe 42. The other end of the vertical pipe 46 is connected to the junction joint 26. The junction joint 26 is a joint member that merges the drainage from the vertical pipe 46 into the drainage standpipe 22.

The junction horizontal pipe 44 and the vertical pipe 46 are configured as a single continuous path without merging with other drainage pipes along the way up to the junction joint 26, and direct the drainage to the drainage standpipe 22. Note that the connection between the junction horizontal pipe 44 and the vertical pipe 46 is illustrated as a continuous vent pipe, but a coupling member such as an elbow may be placed in this vent pipe section. When a coupling member is placed, an inspection hatch or the like may be provided on the coupling member as appropriate.

2, a vent pipe 50 is connected to the temporary storage tank 30. One end of the vent pipe 50 is connected to the upper part of the side wall where the protruding part 30B is formed in the temporary storage tank 30, and extends approximately parallel to the horizontal pipe 42. The other end of the vent pipe 50 is connected to the junction joint 26. The other end of the vent pipe 50 is connected to the connection port 67B of the air supply pipe 66 at the other end side to the part of the vent pipe 50 close to the temporary storage tank 30. The air supply pipe 66 is connected to the drainage standpipe 22 via the junction joint 26. The vent pipe 50 allows air to flow in and out of the temporary storage tank 30 so that the pressure inside the temporary storage tank 30 becomes atmospheric pressure. Air is also supplied from the vent pipe 50 to the horizontal pipe 42 via the air supply pipe 66.

<Action and Effects>
Next, the operation and effects of the piping structure 20 of this embodiment will be described.

Wastewater discharged from the plumbing fixtures 12 flows into the temporary storage tank 30 from the inlet 30A via the wastewater inlet pipe 24. The wastewater that flows into the temporary storage tank 30 is diverted from the protruding part 30B through the branch joint 60 into two horizontal pipes 42, merges at the junction horizontal pipe 44, and is led to the vertical pipe 46, and is discharged into the drainage standpipe 22.

In the initial stage when wastewater flows into the temporary storage tank 30, the inside of the vertical pipe 46 is not yet full and no siphon force is being generated, so the amount of wastewater discharged per unit time from the protruding portion 30B is small compared to the amount of wastewater flowing into the temporary storage tank 30 per unit time, and the water level of the wastewater rises in the temporary storage tank 30. As the water level of the wastewater rises in the temporary storage tank 30, the air in the temporary storage tank 30 is pushed out through the vent pipe 50 and discharged to the drainage vertical pipe 22. This allows the wastewater to flow into the temporary storage tank 30 quickly and efficiently.

When the vertical pipe 46 is full and wastewater falls down the vertical pipe 46 due to gravity, a siphon force is generated due to the potential energy of the siphon head Hs. When the siphon force is generated, the wastewater in the temporary storage tank 30 is sucked in, and the drainage speed increases. In this embodiment, the wastewater stored in the temporary storage tank 30 is drained from two horizontal drain pipes 42. Therefore, the wastewater treatment capacity from the temporary storage tank 30 can be increased compared to a configuration in which only one horizontal drain pipe 42 is connected to the temporary storage tank 30.

When the siphon force is generated and the drainage water in the temporary storage tank 30 is sucked in, the pressure inside the temporary storage tank 30 becomes negative, and air is supplied to the temporary storage tank 30 from the vent pipe 50. In addition, air is appropriately sucked from the vent pipe 50 through the air supply pipe 66, through the air supply inlet space 72A in the air supply connection part 61, and through the air supply flow path space 72B into the branch flow path 65. The air sucked into the branch flow path 65 flows into the horizontal draw pipe 42. The suction of the air can promote the generation of the siphon force in the siphon drain pipe 40. In this embodiment, air can be sucked into each of the multiple horizontal draw pipes 42 by one air supply pipe 66, and the drainage capacity by the siphon force can be efficiently improved.

In addition, in this embodiment, a flat drainage surface 76 is arranged from the upper end of the single flow path 63A in the branch joint 60 toward the upper end of the branch flow path 65. Therefore, drainage can be smoothly introduced from the single flow path 63A to the branch flow path 65.

In addition, in this embodiment, at the upper end of the single space 63B in the branch joint 60, the cross section of the communication flow passage 61A is narrowed by the flat drainage surface 76 of the core member 70, and air is sucked in through the opening S. This prevents air from stagnating, and reduces abnormal noise when sucking in air.

In addition, in this embodiment, the air supply pipe 66 is connected to the vent pipe 50, which is connected to the temporary storage tank 30. Therefore, when the water level in the temporary storage tank 30 rises and wastewater in the temporary storage tank 30 flows into the vent pipe 50, the wastewater can be made to flow out to the horizontal pipe 44 via the air supply pipe 66.

When performing maintenance and inspection of the temporary storage tank 30, the lid 34 is opened and the interior of the temporary storage tank 30 is accessed through the inspection opening 32. The lid 61D is also opened and the core member 70 is removed through the inspection opening 61B, and the branch joint 60 and the protrusion 30B are accessed through the communication flow path 61A of the air supply connection part 61.

In this embodiment, the protrusion 30B and the branch joint 60, which are prone to accumulating dirt, can be easily accessed from the inspection opening 61B. In addition, by placing the core member 70 in the communication flow passage 61A, the cross-sectional area of the air flow passage can be freely reduced even if the inspection opening 61B is relatively large.

In this embodiment, two horizontal pipes 42 are provided, but the number of horizontal pipes 42 may be one or three or more. In this embodiment, the horizontal pipes 42 are merged into one merged horizontal pipe 44, but they may be connected to individual vertical pipes 46 and merged into the drainage standpipe 22 without merging. By merging into one vertical pipe 46 as in this embodiment, a large amount of wastewater is collected in the vertical pipe 46, so that the flow rate of wastewater required to generate siphon force can be quickly secured and the siphoning time can be shortened.

Other Embodiments
In the above embodiment, the branch joint 60 has been described as having a shape in which the single flow path 63A and the branch flow path 65 are arranged in parallel. However, as the branch joint, a Y-shaped branch joint 60-1 as shown in FIG. 7(A) or a T-shaped branch joint 60-2 (a shape in which a direct current flow path and a branch diagonally branched from the direct current flow path) as shown in FIG. 7(B) may also be used.

12 Water-related equipment, 20 Piping structure, 30 Temporary storage tank, 42 Horizontal pipe, 46 Vertical pipe, 50 Vent pipe, 60 Branch joint (outlet portion)
61 Air supply connection part (air supply part), 61A Communication flow path, 61B Inspection opening (opening)
63A single flow path, 65 branch flow path (multiple flow paths), 66 air supply pipe (air supply section)
70: core member; 76: flat drainage surface; 72A: air supply inlet space (air supply passage); 72B: air supply passage space (air supply passage)

Claims (5)

A temporary storage tank for storing wastewater discharged from a water-related fixture;
A horizontal pipe connected to the temporary storage tank via an outflow portion and discharging the wastewater stored in the temporary storage tank in a horizontal direction;
A vertical pipe that generates a siphon force in the horizontal pipe by allowing the drainage water from the horizontal pipe to flow downward;
A cylindrical air supply section connected to a vertical upper portion of the outlet section and supplying air to the horizontal pipe;
an inspection opening formed at an upper end of the air supply section and closed by a lid ;
a connection opening formed in an upper part of a side surface different from the inspection opening of the air supply unit and connected to an air supply pipe for supplying air;
a core member that is disposed within the air supply section so as to be removable from the inspection opening, the core member making a flow path cross-sectional area of a lower portion of the air supply section smaller than a cross-sectional area of the inspection opening and constituting an air supply path through which air passes;
A piping structure equipped with: The piping structure according to claim 1 , wherein a lower end of the core member is disposed at a height position corresponding to an upper end of the horizontal pipe. A flat drainage surface is formed at the lower end of the core member, extending from the upper end of the outflow portion to the upper end of the horizontal draw pipe, and directing drainage from the temporary storage tank to the horizontal draw pipe .
The piping structure according to claim 1 or 2. The outlet portion is formed with a branching portion that branches the wastewater discharged from the temporary storage tank from a single flow path into multiple flow paths,
The horizontal pipe is connected to each of the multiple flow paths branched at the branching portion,
The piping structure according to any one of claims 1 to 3, wherein the air supply section is connected to the branch section and supplies air to the branch section. an air vent pipe connected to the temporary storage tank for supplying air to the temporary storage tank;
The air supply unit is connected to the air vent pipe.
The piping structure according to any one of claims 1 to 4.