Pipe structure

Abstract

To facilitate cleaning in an outflow portion of wastewater from a temporary storage tank.SOLUTION: A piping structure 20 includes: a temporary storage tank 30 for storing wastewater discharged from a plumbing device 12; a horizontal pipe 42 that is connected to the temporary storage tank 30 via an outflow part (branch joint 60) to discharge wastewater stored in the temporary storage tank 30 in a lateral direction; a vertical pipe 46 that generates a siphon force in the horizontal pipe 42 by letting the wastewater from the horizontal pipe 42 flow down; an air supply connection 61 that is connected an upper portion in a vertical direction of the outflow part to supply air to the horizontal pipe 42; an inspection opening 61B formed in the air supply connection 61; and a core member 70 that is placed in the air supply connection 61 so as to be pulled out of the inspection opening 61B, makes the cross-sectional area of a lower portion of the air supply connection 61 smaller than the cross-sectional area of the inspection opening 61B, and constitutes an air supply path.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a piping structure. [Background technology]

[0002] The following Patent Document 1 describes a siphon drainage system that applies a siphon force to wastewater discharged from a plumbing fixture and stored in a temporary storage tank to cause it to flow out. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-256557 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a siphon drainage system equipped with a temporary storage tank as in Patent Document 1, dirt tends to accumulate in the part (outflow part) where wastewater flows from the temporary storage tank to the siphon drainage pipe. Generally, a cleaning port for cleaning is provided on the top of the temporary storage tank, but it may be difficult to form the cleaning port in a position close to the outflow part due to the structure of the floor or the relationship with installed objects.

[0005] In view of the above, an object of the present invention is to provide a piping structure that allows easy cleaning of the outflow portion of wastewater from a temporary storage tank. [Means for solving the problem]

[0006] The piping structure of the first embodiment comprises a temporary storage tank that stores wastewater discharged from a plumbing fixture, a horizontal pull pipe connected to the temporary storage tank via an outlet section and that discharges the wastewater stored in the temporary storage tank laterally, a vertical pipe that generates a siphon force in the horizontal pull pipe by flowing the wastewater from the horizontal pull pipe downward, an air supply section connected to the vertical upper part of the outlet section and that supplies air to the horizontal pull pipe, an opening formed in the air supply section, and a core member that is arranged in the air supply section so that air can be extracted from the opening, and that 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 constitutes an air supply path through which air can pass.

[0007] In the piping structure of the first embodiment, an air supply section is connected to the outlet section which 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.

[0008] In addition, since the flow path cross-sectional area at the bottom of the air intake section is reduced and the core member that constitutes the air intake passage is positioned within the air intake section, the diameter of the air intake section can be increased to allow for ease of cleaning, while the core member reduces the area where the air for intake stagnates, thereby reducing abnormal noise during drainage caused by stagnant air.

[0009] In the piping structure of the second aspect, the lower end of the core member is disposed at a position corresponding to the upper end of the horizontal pipe.

[0010] According to the piping structure of the second aspect, air is less likely to remain between the lower end of the core member and the upper end of the horizontal pipe, and abnormal noise during drainage due to air retention can be reduced.

[0011] In the piping structure of the third aspect, 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 pipe.

[0012] According to the piping structure of the third aspect, the flat drainage surface allows the drainage water to be smoothly guided from the temporary storage tank to the horizontal pipe.

[0013] In a fourth embodiment of the piping structure, a branching section is formed in the outlet section to branch 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.

[0014] According to the piping structure of the fourth aspect, by flowing wastewater from the temporary storage tank into the multiple horizontal pipes, it is possible to promote drainage from the temporary storage tank.

[0015] The piping structure of a fifth aspect includes an air vent pipe connected to the temporary storage tank and supplying air to the temporary storage tank, and the air supply unit is connected to the air vent pipe.

[0016] In the piping structure of the fifth embodiment, an air 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. Effect of the Invention

[0017] According to the piping structure of the present invention, the portion where wastewater flows out from the temporary storage tank can be easily cleaned. [Brief description of the drawings]

[0018] [Figure 1] 1 is a side view showing a piping structure according to an embodiment of the present invention. [Diagram 2] 1 is a perspective view showing a piping structure according to an embodiment of the present invention. [Diagram 3] 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. [Figure 4] 6 is a cross-sectional view taken along line BB in FIG. 5. [Diagram 5] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 6] FIG. 2 is a perspective view of a core member according to an embodiment of the present invention. [Figure 7] 1A and 1B 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, a piping structure according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by 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 may be present in multiple numbers.

[0020] In addition, the description of the same configuration and reference numerals in each drawing may be omitted. Note that the present invention is not limited to the following embodiment, and may be modified as appropriate within the scope of the object of the present invention, such as omitting configurations or replacing them with different configurations.

[0021] In the drawing, arrow Z indicates the vertical upward direction, and arrows X and Y indicate horizontal directions perpendicular to each other.

[0022] <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.

[0023] 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. A plurality of drainage standpipes 22 are provided at different locations on the floor plan of the apartment building 10. The drainage standpipe 22 is housed, for example, in a piping space (also referred to as a pipe space, etc.) that is partitioned off from each residence on each floor of the apartment building 10 by a wall.

[0024] Each dwelling unit in the apartment building 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.

[0025] The other end of the wastewater inlet pipe 24 is connected to the temporary storage tank 30 described below. As a result, the wastewater inlet pipe 24 introduces wastewater discharged from the bathtub 12A and the washing area 12B of the plumbing fixture 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.

[0026] The temporary storage tank 30 is capable of temporarily storing wastewater from the plumbing fixtures 12, and is formed in a substantially 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 the inlet section 30A. A protruding section 30B is formed in the lower part of the other side wall opposite the one side wall of the temporary storage tank 30. The inlet section 30A is shaped so that the side connected to the wastewater introduction pipe 24 is concave.

[0027] A branch joint 60 as an outflow section, which will be described later, is connected to the protruding section 30B, and the siphon drain pipe 40 is connected via the branch joint 60. The protruding section 30B is convex and protrudes toward the side to which the branch joint 60 is connected, and an outflow opening 30C having a horizontally long hole shape is formed at the tip. The temporary storage tank 30 is formed of a resin material, such as polyvinyl chloride.

[0028] 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.

[0029] (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 from the single flow path 63A perpendicular to the single flow path 63A.

[0030] The multiple flow passage section 64 protrudes in parallel from the single flow passage section 62 in the same direction as the single flow passage section 62, and two branch flow passages 65 arranged parallel to each other along the outer shape of the multiple flow passage section 64 are formed inside. Each branch flow passage 65 is continuous with the single space 63B, and is connected to a horizontal pipe 42 described later. As shown in Fig. 5, the inner diameter of the single flow passage 63A is larger than the inner diameter of the horizontal pipe 42, the lower end of the single flow passage 63A is arranged at approximately the same height as the lower end of the horizontal pipe 42, and the upper end of the single flow passage 63A is arranged at a position higher than the upper end of the horizontal pipe 42.

[0031] An air supply connection 61 is formed at the top of the single passage section 62 as an air supply section. The air supply connection 61 is substantially cylindrical, and has a communication passage 61A formed therein that communicates with the single space 63B from above. An inspection opening 61B is formed at the top end of the air supply connection 61, opening upward from the communication passage 61A. The inspection opening 61B is closed by a lid 61D. In addition, a connection opening 61C is formed at the top of the side surface of the air supply connection 61, opening from the communication passage 61A to the ventilation pipe 50 side. An air supply pipe 66 is connected to the connection opening 61C.

[0032] (Core material) 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 into the communicating flow passage 61A within the air supply connection 61.

[0033] The main body 72 extends downward from the locking portion 74 and is disposed in the communication flow passage 61A. An air intake inlet space 72A and an air intake flow passage space 72B are formed on the side of the main body 72 as an example of an air intake passage. As shown in FIG. 4, the air intake inlet space 72A is formed in a position corresponding to the connection opening 61C of the air intake connection portion 61 so that the main body 72 is concave. The air intake flow passage space 72B is formed in a position corresponding to the horizontal pipe 42 side rotated 90° from the air intake inlet space 72A so that the main body 72 is concave 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 passage 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.

[0034] 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 follow the inner wall of the air supply connection part 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, and a flat drainage surface 76 is formed. Here, the "upper end" can also be referred to as the "ceiling part" of each flow path, etc. Also, the "flat drainage surface" can also be referred to as the "sloping drainage surface" or the "sloping ceiling surface", etc.

[0035] With the core member 70 disposed in the communicating passage 61A, the main body 72 is disposed on the upstream side (left side in FIG. 5) in the direction of drainage water flow inside the air intake connection part 61. Therefore, the cross-sectional area of ​​the air intake passage space 72B, which is the part through which air flows at the bottom of the communicating 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 communicating passage 61A is the opening area of ​​the air intake passage space 72B to the single passage 63, which is the opening S.

[0036] A connection port 67A on one end side of an air supply pipe 66 is connected to the connection opening 61C. A connection port 67B on the other end side of the air supply pipe 66 is connected to the ventilation pipe 50.

[0037] (Siphon drain pipe) As shown in FIG. 2, the siphon drain pipe 40 includes multiple (two in this embodiment) horizontal pipes 42 arranged along the slab 14, a junction horizontal pipe 44, a vertical pipe 46, and a horizontal junction joint member 48.

[0038] The horizontal pipe 42 discharges wastewater discharged from the plumbing fixtures 12 horizontally through multiple flow paths. The horizontal pipe 42 is formed of a polybutene pipe with a nominal diameter of 25J (inner diameter of approximately 28mm), for example, and is disposed without gradient along the horizontal direction on the slab 14. Note that "without gradient" here does not have to be strictly horizontal, and includes some steps or gradients along the slab 14.

[0039] The "upstream" end of each of the two horizontal pipes 42 is connected to the branch flow path 65 of the branch joint 60. The "downstream" end of each of the horizontal pipes 42 is 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 a horizontal direction. The junction horizontal pipe 44 and the horizontal junction joint member 48 may be integrally configured.

[0040] 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. In addition, the cross-sectional area of ​​the confluence horizontal pipe 44 is preferably less than the total cross-sectional area of ​​the two horizontal pipes 42. The cross-sectional areas of the confluence 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.

[0041] As shown in Figures 1 and 2, a junction horizontal pipe 44 is connected to the upstream side of the standpipe 46. The standpipe 46 is disposed 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 standpipe 46 is connected to a junction joint 26. The junction joint 26 is a joint member that merges the drainage water from the standpipe 46 into the drainage standpipe 22.

[0042] 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 disposed in this vent pipe section. When a coupling member is disposed, an inspection hatch or the like may be provided in the coupling member as appropriate.

[0043] As shown in FIG. 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. A connection port 67B on the other end side of the air supply pipe 66 is connected to a 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 air 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.

[0044] <Action and Effects> Next, the operation and effects of the piping structure 20 of this embodiment will be described.

[0045] 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 branched into two horizontal pipes 42 via the branch joint 60 from the protruding part 30B, merges at the junction horizontal pipe 44, and is led to the vertical pipe 46 and discharged into the drainage standpipe 22.

[0046] In the initial stage of wastewater flowing into the temporary storage tank 30, the inside of the vertical pipe 46 is not yet full and no siphon force is generated, so the amount of wastewater discharged per unit time from the protruding portion 30B is smaller than 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 in the temporary storage tank 30 rises, the air in the temporary storage tank 30 is pushed and discharged to the drainage vertical pipe 22 via the ventilation pipe 50. This allows the wastewater to flow into the temporary storage tank 30 quickly and efficiently.

[0047] When the upright pipe 46 is filled with water and the wastewater falls down the upright pipe 46 due to gravity, a siphon force is generated by 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 the 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.

[0048] 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, so that air is supplied to the temporary storage tank 30 from the ventilation pipe 50. In addition, air is appropriately sucked from the ventilation pipe 50 through the air supply pipe 66, the air supply inlet space 72A in the air supply connection part 61, and 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 drawing pipe 42. The suction of the air can promote the generation of the siphon force in the siphon drain pipe 40. In this embodiment, the single air supply pipe 66 can suck air into each of the multiple horizontal drawing pipes 42, and the drainage capacity by the siphon force can be efficiently improved.

[0049] In this embodiment, the flat drainage surface 76 is disposed 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, the drainage water can be smoothly introduced from the single flow path 63A to the branch flow path 65.

[0050] 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 can suppress abnormal noise when air is sucked in.

[0051] 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.

[0052] When performing maintenance and inspection of temporary storage tank 30, lid 34 is opened to access the inside of temporary storage tank 30 through inspection opening 32. Also, lid 61D is opened to remove core member 70 through inspection opening 61B, and branch joint 60 and protrusion 30B are accessed through communication flow path 61A of air supply connection part 61.

[0053] In this embodiment, protrusion 30B and branch joint 60, which are relatively prone to accumulate dirt, can be easily accessed from inspection opening 61B. In addition, by disposing core member 70 in communicating flow passage 61A, the cross-sectional area of ​​the air flow passage can be freely reduced even when inspection opening 61B is relatively large.

[0054] In this embodiment, two horizontal pipes 42 are provided, but the number of horizontal pipes 42 may be one or three or more. In addition, in this embodiment, the horizontal pipes 42 are merged into one merged horizontal pipe 44, but each of the horizontal pipes 42 may be connected to an individual vertical pipe 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 a siphon force can be quickly secured, and the siphoning time can be shortened.

[0055] (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 having a direct current flow path and a shape branching diagonally from the direct current flow path) as shown in FIG. 7(B) may also be used. [Explanation of symbols]

[0056] 12 Plumbing fixtures, 20 Piping structure, 30 Temporary storage tank 42 horizontal pipe, 46 vertical pipe, 50 vent pipe, 60 branch joint (outlet) 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

1. 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:

2. 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.

3. 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.

4. 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.

5. 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.

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