Piping structure

Abstract

To provide a piping structure with a plurality of syphon drainage pipes in a temporary storage tank, for shortening a syphon generation time while securing a drainage treatment amount.SOLUTION: A piping structure 20 includes first horizontal pipes 31A, 31B each connected to the downstream side of a temporary storage tank 30 provided in a drainage system via a branch connection 28 for discharging drainage water discharged from the temporary storage tank 30 in the horizontal direction, a pipe joint 48 (a joint part) for joining the first horizontal pipes 31A, 31B into one, a second horizontal pipe 44 connected to the downstream side of the pipe joint 48 for discharging the joined drainage water in the horizontal direction, and a solid pipe 46 connected to the downstream side of the second horizontal pipe 44 for making the drainage water flow down to generate syphon force in the first horizontal pipes 31A, 31B and in the second horizontal pipe 44.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] A siphon drainage system is disclosed that has a temporary storage tank that temporarily stores wastewater discharged from a plumbing fixture, and a plurality of siphon drainage pipes that are connected to the temporary storage tank and that apply siphon force to the wastewater stored in the temporary storage tank to cause it to flow out (see Patent Document 1). The siphon drainage pipes are configured with a horizontal pull pipe that is connected to the temporary storage tank, and a vertical pipe that communicates with the downstream side of the horizontal pull pipe, extends downward, and merges with a drainage standpipe. [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 the conventional example described above, the inner diameter of the siphon drain pipe is made smaller than the 20 to 25 mm inner diameter used in conventional siphon drainage systems, so that full flow occurs quickly at the drop-off point from the horizontal pipe to the vertical pipe, shortening the time until the siphon force is activated (siphon generation time).

[0005] However, the amount of wastewater discharged per unit time from plumbing fixtures varies from fixture to fixture. For example, a toilet discharges less than 10 liters at a time, while a bathtub may discharge around 200 liters at a time. When discharging such a large amount of wastewater, it may take a long time to drain using a siphon drain pipe with a small inner diameter. Also, if the horizontal pipe is long (for example, 10 m), it takes a long time to obtain the flow rate required for siphoning at the drop-in section, which lengthens the time for siphoning to occur, and wastewater is more likely to accumulate in the temporary storage tank.

[0006] The present invention aims to shorten the siphoning time while ensuring the amount of wastewater treatment in a structure in which multiple siphon drain pipes are provided in a temporary storage tank. [Means for solving the problem]

[0007] The piping structure of the first aspect includes a plurality of first horizontal pipes connected via a branch joint to the downstream side of a temporary storage tank provided in a drainage system and discharging wastewater discharged from the temporary storage tank laterally, a junction section that merges the plurality of first horizontal pipes into one, a second horizontal pipe connected to the downstream side of the junction and discharging the merged wastewater laterally, and a vertical pipe connected to the downstream side of the second horizontal pipes and generating a siphon force in the first horizontal pipe and the second horizontal pipe by flowing the wastewater downward.

[0008] In the piping structure according to the first aspect, the temporary storage tank is drained through the first horizontal pipes, which ensures a sufficient amount of wastewater treatment and prevents the wastewater from overflowing into the bathroom or other area located upstream of the temporary storage tank. In addition, in the piping structure according to the first aspect, the first horizontal pipes merge into one at the junction, so that the flow rate of the second horizontal pipe increases and the drop-down section from the second horizontal pipe to the vertical pipe can be filled up quickly, thereby shortening the siphoning time. Furthermore, in the piping structure of the first aspect, the temporary storage tank and the multiple first horizontal pipes are connected via branch joints, so that the structure around the wastewater outlet of the temporary storage tank can be simplified compared to, for example, a configuration in which the multiple first horizontal pipes are directly connected to the temporary storage tank.

[0009] In a second aspect, in the piping structure according to the first aspect, in the temporary storage tank, a diameter of the wastewater outlet is within a range of ±5% of a diameter of the wastewater inlet.

[0010] In the piping structure according to the second aspect, the diameter of the wastewater outlet of the temporary storage tank is within ±5% of the diameter of the wastewater inlet, so that the amount of wastewater inflow and outflow into the temporary storage tank is almost equal, and a sufficient amount of wastewater can be treated. This effectively prevents wastewater from overflowing from the bathroom or other places located upstream of the temporary storage tank.

[0011] A third aspect is the piping structure according to the first aspect, wherein the temporary storage tank has a diameter of a wastewater outlet port equal to or larger than a diameter of a wastewater inlet port.

[0012] In the piping structure according to the third aspect, the diameter of the wastewater outlet of the temporary storage tank is equal to or larger than the diameter of the wastewater inlet, so that the wastewater outflow capacity exceeds the wastewater inflow capacity of the temporary storage tank, and a sufficient amount of wastewater can be treated. This effectively prevents wastewater from overflowing from the bathroom or other places located upstream of the temporary storage tank.

[0013] In a fourth aspect, in a piping structure according to any one of the first to third aspects, when the flow path cross-sectional area of ​​the outlet of the temporary storage tank is A1, the sum of the flow path cross-sectional areas of the multiple first horizontal pipes is A2, the flow path cross-sectional area of ​​the second horizontal pipe is A3, and the flow path cross-sectional area of ​​the vertical pipe is A4, the relationship A1>A2>A3>A4 is satisfied.

[0014] In the piping structure according to the fourth aspect, the flow path cross-sectional area of ​​each part is set to satisfy the relationship A1>A2>A3>A4, so that the flow rate of the second horizontal pipe is increased and the part where the second horizontal pipe drops into the vertical pipe can be filled up quickly, thereby further shortening the siphoning time.

[0015] A fifth aspect is a piping structure according to any one of the first to third aspects, further comprising an air vent pipe connecting the temporary storage tank and the junction, and a branch pipe branching off from the air vent pipe is connected to the branch fitting.

[0016] In the piping structure according to the fifth aspect, since the branch pipe branched off from the vent pipe is connected to the branch joint, the portion where the second horizontal pipe drops into the vertical pipe can be filled up more quickly than in a configuration in which the vent pipe is not connected to the branch joint, and this can further reduce the siphoning time.

[0017] In a sixth aspect, in the piping structure according to any one of the first to fifth aspects, the second horizontal pipe and the upright pipe are hard polyvinyl chloride pipes.

[0018] In the piping structure of the sixth aspect, since the second horizontal pipe and the vertical pipe are rigid polyvinyl chloride pipes, the piping structure can be constructed more inexpensively than a configuration in which the second horizontal pipe and the vertical pipe are polybutylene pipes. Effect of the Invention

[0019] According to the present invention, in a structure in which a temporary storage tank is provided with multiple siphon drain pipes, the siphon force generation time can be shortened while ensuring the drainage treatment volume. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a side view showing the piping structure according to the embodiment. [Diagram 2] FIG. 1 is a perspective view showing a piping structure according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a plan view showing a piping structure according to the embodiment. [Figure 4] FIG. 4 is an enlarged view of a portion indicated by an arrow 4 in FIG. [Diagram 5] FIG. 5 is a cross-sectional view of the portion shown in FIG. [Figure 6] 4 is a cross-sectional view of a portion indicated by an arrow 6 in FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, 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 or similar components. Note that duplicated descriptions and reference numerals in the embodiments described below may be omitted. In addition, all drawings used in the following description are schematic, and the dimensional relationship of each element, the ratio of each element, etc. shown in the drawings do not necessarily match the actual ones. In addition, the dimensional relationship of each element, the ratio of each element, etc. between multiple drawings do not necessarily match.

[0022] FIG. 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. As an example, the piping structure 20 is used in an apartment house 10 that is formed in multiple layers. As shown in FIG. 2, this piping structure 20 includes a plurality (a pair in this embodiment) of first horizontal pipes 31A, 31B, a pipe joint 48 as an example of a junction, a second horizontal pipe 44, and a vertical pipe 46. The portion from the first horizontal pipes 31A, 31B to the vertical pipe 46 can also be called a siphon drainage pipe 40.

[0023] The piping structure 20 is equipped with a drainage standpipe 22 that drains wastewater downward. A plurality of drainage standpipes 22 are provided at different locations on the floor plan of the apartment building 10. For example, the drainage standpipes 22 are housed along the up-down direction (vertical direction) in a piping space (also referred to as a pipe space, etc.) that is partitioned by walls from each dwelling unit on each floor of the apartment building 10, and penetrate the slab 14 of each floor of the apartment building 10.

[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 introduction pipe 24 is connected to the temporary storage tank 30. As a result, the wastewater introduction 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 introduction pipe 24 is disposed with a slope so that the temporary storage tank 30 side is lower. The wastewater introduction pipe 24 has a nominal diameter of 50A (inner diameter of 50 mm), for example.

[0026] The temporary storage tank 30 is a container for temporarily storing wastewater introduced from the plumbing fixtures 12 through the wastewater introduction pipe 24 and discharging it to the drainage standpipe 22. The diameter of the inlet 30B, which serves as a wastewater inlet to which the wastewater introduction pipe 24 of the temporary storage tank 30 is connected, is the same as that of the wastewater introduction pipe 24. Here, the inner diameter of the inlet 30B is 53 mm. The temporary storage tank 30 is formed of a resin material such as rigid polyvinyl chloride. The piping structure 20 according to this embodiment is connected to the downstream side of the wastewater in the temporary storage tank 30.

[0027] As shown in FIG. 3, a branch joint 28 is connected to the downstream side of an outlet 30A (see FIG. 5) serving as a wastewater outlet of a temporary storage tank 30 provided in a drainage system. The inner diameter of this outlet 30A is, for example, about 53 mm. The diameter (inner diameter) of the outlet 30A is set within a range of ±5% of the diameter (inner diameter) of the inlet 30B. It is preferable to set the diameter (inner diameter) of the outlet 30A within a range of ±3% of the diameter of the inlet 30B. Furthermore, the diameter of the outlet 30A may be set to be equal to or larger than the diameter of the inlet 30B.

[0028] As shown in Fig. 4 and Fig. 5, the branch joint 28 has a structure including, for example, a straight pipe section 28A and a branch pipe section 28B that branches into two from the straight pipe section 28A. In addition, the branch joint 28 in this embodiment is a substantially Y-shaped joint in a plan view, but the present invention is not limited to this. In addition, the straight pipe section 28A is located upstream, and the pair of branch pipe sections 28B are located downstream. That is, the straight pipe section 28A is connected to the outlet 30A, the first horizontal pipe 31A is connected to one branch pipe section 28B, and the first horizontal pipe 31B is connected to the other branch pipe section 28B. In addition, in this embodiment, the downstream ends of the pair of branch pipe sections 28B are parallel to each other.

[0029] 2 and 3, a branch pipe 50A branched off from a vent pipe 50, which will be described later, is connected to the branch joint 28. Specifically, the branch pipe 50A is connected to a vent pipe section 28C included in the branch joint 28. The vent pipe section 28C is provided in the branch joint 28 so that the pipe axis direction thereof intersects with the pipe axis direction of the straight pipe section 28A. In this embodiment, the pipe axis direction of the vent pipe section 28C is perpendicular to the pipe axis direction of the straight pipe section 28A.

[0030] As shown in FIG. 2 and FIG. 3, the first horizontal pipes 31A and 31B are pipes arranged substantially parallel to each other in the horizontal direction, for example, along the slab 14. The first horizontal pipes 31A and 31B are horizontal pipes connected to the downstream side of the branch joint 28 and horizontally discharge the wastewater discharged from the temporary storage tank 30. The first horizontal pipes 31A and 31B are formed of polybutene pipes with a nominal diameter of 25J (inner diameter of about 28.1 mm), for example, and are arranged on the slab 14 in a horizontal direction without a gradient. Note that the term "without a gradient" does not necessarily mean a strictly horizontal direction, and includes a pipe having some steps or gradients along the slab 14. The upstream end of the first horizontal pipe 31A is connected to a pipe connection part of one branch pipe part 28B in the branch joint 28. The upstream end of the first horizontal pipe 31B is connected to a pipe connection part of the other branch pipe part 28B in the branch joint 28. The two first horizontal pipes 31A, 31B do not necessarily have to be parallel to each other depending on the conditions of the location where they are laid.

[0031] As shown in FIG. 3 and FIG. 6, the pipe joint 48 merges the first horizontal pipes 31A and 31B into one. The pipe joint 48 has a structure including, for example, a straight pipe section 48A and a branch pipe section 48B that branches into two from the straight pipe section 48A. The pipe joint 48 is a substantially Y-shaped joint in a plan view, but the present invention is not limited to this. The straight pipe section 48A is located downstream, and the pair of branch pipe sections 48B are located upstream. That is, the downstream end of the first horizontal pipe 31A is connected to the pipe connection section of one branch pipe section 48B, and the downstream end of the first horizontal pipe 31B is connected to the pipe connection section of the other branch pipe section 48B. The upstream end of the second horizontal pipe 44 is connected to the pipe connection section of the straight pipe section 48A. The upstream ends of the pair of branch pipe sections 48B are parallel to each other.

[0032] The upstream end of the first horizontal pipe 31A is connected to the piping connection portion of one of the branch pipe sections 28B at the branch fitting 28, and the downstream end of the first horizontal pipe 31A is connected to the piping connection portion of one of the branch pipe sections 48B at the pipe fitting 48. In addition, the upstream end of the first horizontal pipe 31B is connected to the piping connection portion of the other branch pipe section 28B in the branch fitting 28, and the downstream end of the first horizontal pipe 31B is connected to the piping connection portion of the other branch pipe section 48B in the pipe fitting 48.

[0033] The second horizontal pipe 44 is a pipe arranged, for example, along the slab 14, is connected to the downstream side of the pipe joint 48, and discharges the combined wastewater laterally. The upstream end of this second horizontal pipe 44 is connected to the piping connection part of the straight pipe section 48A of the pipe joint 48. The second horizontal pipe 44 is formed, for example, of a rigid polyvinyl chloride pipe with a nominal diameter of 30A (inner diameter of 30 mm), and is arranged without gradient along the horizontal direction above the slab 14.

[0034] The standpipe 46 is connected to the downstream side of the second horizontal pipe 44, and is a portion that generates a siphon force in the first horizontal pipes 31A, 31B and the second horizontal pipe 44 by flowing the wastewater downward. The standpipe 46 is, for example, a hard polyvinyl chloride pipe with a nominal diameter of 25A (inner diameter of 25 mm). The standpipe 46 is disposed, for example, in the up-down direction (vertical direction) along the drainage standpipe 22. The downstream end of the standpipe 46 reaches the junction joint 26. The junction joint 26 is a pipe joint that merges the wastewater from the standpipe 46 into the drainage standpipe 22. The length from the pipe joint 48 to the standpipe 46 may be, for example, 500 to 1000 mm. The pipe joint 48, which is the junction, is not located in a meter box outside the wall 18, but is located, for example, inside the wall 18, that is, on the dwelling unit side.

[0035] The drop-in portion located at the boundary between the second horizontal pipe 44 and the vertical pipe 46 is illustrated as a continuous vent pipe, but a pipe fitting such as an elbow may be placed at this vent pipe portion. If a pipe fitting is placed here, an inspection hatch or the like can be appropriately provided at the pipe fitting. The drop-in portion from the second horizontal pipe 44 to the vertical pipe 46 is placed outside the wall 18 of the dwelling unit, for example, inside a meter box.

[0036] The temporary storage tank 30 is further connected to a vent pipe 50, which reaches the junction joint 26. The vent pipe 50 also includes a branch pipe 50A that branches off midway. The branch pipe 50A is connected to the vent pipe portion 28C of the branch joint 28.

[0037] If the cross-sectional area of ​​the outlet 30A in the temporary storage tank 30 is A1, the sum of the cross-sectional areas of the first horizontal pipes 31A and 31B is A2, the cross-sectional area of ​​the second horizontal pipe 44 is A3, and the cross-sectional area of ​​the vertical pipe 46 is A4, then the relationship A1>A2>A3>A4 is satisfied. Calculating the cross-sectional area from the inner diameter of each pipe, A1≈2206 mm 2 , A2 ≒ 1240 mm 2 , A3 ≒ 707 mm 2 , A4 ≒ 491 mm 2 and the above relationship is satisfied.

[0038] In addition, when the flow passage cross-sectional area is not constant, the flow passage cross-sectional area means the average flow passage cross-sectional area. The flow passage cross-sectional area A1 of the outlet 30A means the average flow passage cross-sectional area of ​​the outlet portion where the cross-sectional area is approximately constant.

[0039] (action) This embodiment is configured as described above, and its operation will be described below. In the piping structure 20 according to this embodiment, by draining water from the temporary storage tank 30 through the first horizontal pipes 31A and 31B, a larger amount of wastewater can be treated compared to a configuration in which only one horizontal pipe is connected. This makes it possible to prevent wastewater from overflowing the plumbing fixture 12 located upstream of the temporary storage tank 30. Even if a large amount of wastewater is discharged from the bathtub 12A at once, the wastewater is quickly discharged because it is treated by the first horizontal pipes 31A and 31B.

[0040] The wastewater flowing through the first horizontal pipes 31A, 31B joins at a pipe joint 48 and is led to the vertical pipe 46 through the second horizontal pipe 44. As the wastewater falls through the vertical pipe 46, a siphon force acts on the first horizontal pipes 31A, 31B and the second horizontal pipe 44. When the siphon force is generated, the wastewater stored in the temporary storage tank 30 is quickly discharged.

[0041] In addition, the wastewater flowing through the first horizontal pipes 31A and 31B merges into one at the pipe joint 48, increasing the flow rate of the second horizontal pipe 44 and quickly filling the drop-down section from the second horizontal pipe 44 to the vertical pipe 46. This shortens the time it takes for siphoning to occur. In particular, since the relationship in the flow path cross-sectional area of ​​each part of the piping structure 20 is set as A1>A2>A3>A4, the flow rate of the second horizontal pipe 44 can be increased to quickly cause the drop-down part from the second horizontal pipe 44 to the vertical pipe 46 to be full flow, thereby further shortening the siphoning time.

[0042] In addition, even if dirt accumulates or foreign matter accumulates in one of the first horizontal pipes 31A, 31B, wastewater can be discharged from the other first horizontal pipe 31A, 31B, thereby reducing the risk of being unable to drain water.

[0043] Furthermore, by using a pipe body having a nominal diameter of 25J, which is a common size, as the first horizontal pipes 31A and 31B, it is possible to use conventional products as piping fixing fixtures, etc.

[0044] Furthermore, when the second horizontal pipe 44 and the riser pipe 46 are rigid polyvinyl chloride pipes, the piping structure can be constructed more inexpensively than when the second horizontal pipe 44 and the riser pipe 46 are polybutene pipes.

[0045] In the piping structure 20, the temporary storage tank 30 and the first horizontal pipes 31A, 31B are connected via the branch joint 28, and therefore the structure around the outlet 30A of the temporary storage tank 30 can be simplified compared to, for example, a configuration in which the first horizontal pipes 31A, 31B are directly connected to the temporary storage tank 30. Specifically, since there is no need to provide an outlet for the first horizontal pipes 31A, 31B in the temporary storage tank 30, the structure around the outlet 30A of the temporary storage tank 30 is simplified, and further, the formability of the temporary storage tank 30 is improved.

[0046] In addition, because the branch pipe 50A branching off from the vent pipe 50 is connected to the branch joint 28, it is possible to quickly generate a full flow at the drop-down portion from the second horizontal pipe 44 to the vertical pipe 46, compared to a configuration in which the vent pipe 50 is not connected to the branch joint 28. This further shortens the siphoning time.

[0047] Furthermore, when the diameter of the outlet 30A of the temporary storage tank 30 is within ±5% of the diameter of the inlet 30B, the inflow and outflow of wastewater into the temporary storage tank 30 become almost equal, ensuring a sufficient amount of wastewater treatment. This effectively prevents wastewater from overflowing from a bathroom or the like located upstream of the temporary storage tank 30.

[0048] Furthermore, when the diameter of the outlet 30A of the temporary storage tank 30 is equal to or larger than the diameter of the inlet 30B, the capacity of the outlet of the temporary storage tank 30 exceeds the inflow of the wastewater into the temporary storage tank 30, and a sufficient amount of wastewater can be treated. This effectively prevents the overflow of wastewater in a bathroom or the like located upstream of the temporary storage tank 30.

[0049] As described above, according to this embodiment, in a structure in which a plurality of siphon drain pipes are provided in the temporary storage tank 30, the siphon force generation time can be shortened while ensuring the amount of drainage treatment.

[0050] [Other embodiments] An example of an embodiment of the present invention has been described above, but the embodiment of the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0051] For example, the branch joint 28 is provided with the straight pipe section 28A and the pair of branch pipe sections 28B, but the branch type is not limited to this and may be of any type. [Explanation of symbols]

[0052] Reference Signs List 20...piping structure, 22...drainage vertical pipe, 28...branch joint, 30...temporary storage tank, 30A...outlet (drainage outlet), 30B...inlet (drainage inlet), 31A...first horizontal pipe, 31B...first horizontal pipe, 44...second horizontal pipe, 46...vertical pipe, 48...pipe joint (junction), 50...vent pipe, 50A...branch pipe

Claims

1. A plurality of first horizontal pipes connected via a branch joint to the downstream side of a temporary storage tank provided in the drainage system for discharging wastewater discharged from the temporary storage tank in a horizontal direction; A junction portion that merges the plurality of first horizontal pipes into one; A second horizontal pipe connected to the downstream side of the confluence and discharging the combined wastewater in a horizontal direction; A vertical pipe connected to the downstream side of the second horizontal pipe and causing the wastewater to flow downward to generate a siphon force in the first horizontal pipe and the second horizontal pipe; A piping structure equipped with:

2. 2. The piping structure according to claim 1, wherein in the temporary storage tank, a diameter of the wastewater outlet is within a range of ±5% of a diameter of the wastewater inlet.

3. The piping structure according to claim 1 , wherein a diameter of the wastewater outlet of the temporary storage tank is equal to or larger than a diameter of the wastewater inlet.

4. The piping structure according to any one of claims 1 to 3, wherein the flow path cross-sectional area of ​​the outlet of the temporary storage tank is A1, the sum of the flow path cross-sectional areas of the multiple first horizontal pipes is A2, the flow path cross-sectional area of ​​the second horizontal pipe is A3, and the flow path cross-sectional area of ​​the vertical pipe is A4, satisfying the relationship A1>A2>A3>A4.

5. a vent pipe connecting the temporary storage tank and a junction joint that merges the drainage from the vertical pipe into a drainage standpipe; 5. The piping structure according to claim 1, wherein a branch pipe branched off from the vent pipe is connected to an upper portion of the branch joint.

6. The piping structure according to any one of claims 1 to 5, wherein the second horizontal pipe and the vertical pipe are rigid polyvinyl chloride pipes.

7. A piping structure described in any one of claims 1 to 6, wherein the multiple first horizontal pipes are arranged horizontally at intervals.

Images