Pipe structure

Abstract

To provide a piping structure capable of curbing an increase of a water-discharging time while shortening a siphon generating time.SOLUTION: A piping structure 20 includes: a plurality of first laterally drawing pipes (horizontal pipe 42) that discharges drain water discharged from a water use facility 12 in a lateral direction; a horizontal pipe 44 that is formed by the horizontal pipes 42 converging at an end part on the downstream side and discharges the drain water in the lateral direction; and a vertical pipe (outflow perpendicular pipe 46) to which the horizontal pipe 44 is connected and generates siphon force in the horizontal pipes 42.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Patent Document 1 below describes a siphon drainage system that causes siphon force to act on the drainage discharged from a plumbing fixture and stored in a temporary storage tank to cause it to flow out.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the siphon drainage system of Patent Document 1 above, by making the inner diameter of the siphon drainage pipe smaller than the inner diameter of 20 to 25 mm that has been used in conventional siphon drainage systems, the time until the siphon force is activated (siphon generation time) is shortened.

[0005] The amount of drainage per unit time of plumbing fixtures varies depending on the fixture. For example, while drainage of less than 10 liters is discharged from a toilet at one time, drainage of about 200 liters may be discharged from a bathtub or the like at one time. When draining such a large amount of drainage, it may take time to drain with a drainage pipe having a small inner diameter.

[0006] In consideration of the above facts, an object of the present invention is to provide a piping structure that can suppress an increase in drainage time while shortening the siphon generation time.

Means for Solving the Problems

[0007] The pipe structure of the first aspect includes a plurality of first horizontal drain pipes that horizontally discharge the wastewater discharged from the plumbing fixtures, a confluence section that merges the plurality of first horizontal drain pipes into one, a second horizontal drain pipe that is connected to the downstream side of the confluence section and horizontally discharges the merged wastewater, and a vertical pipe that is connected to the downstream side of the second horizontal drain pipe and generates siphon force in the first horizontal drain pipe and the second horizontal drain pipe by allowing the wastewater to flow down.

[0008] In the pipe structure of the first aspect, the first horizontal drain pipes that discharge the wastewater discharged from the plumbing fixtures merge at the confluence section, and a second horizontal drain pipe is connected to the confluence section. And this second horizontal drain pipe is connected to the vertical pipe. The wastewater flowing through the first horizontal drain pipe merges at the confluence section and is led to the vertical pipe through the second horizontal drain pipe. As the wastewater falls in the vertical pipe, siphon force acts on the first horizontal drain pipe and the second horizontal drain pipe.

[0009] Here, siphon force acts on each first horizontal drain pipe as the merged wastewater falls in one vertical pipe. For this reason, for example, compared with the case where individual vertical pipes are respectively connected to each first horizontal drain pipe, a large amount of wastewater gathers in the vertical pipe. That is, the flow rate of the wastewater required to generate siphon force can be ensured quickly. Thereby, the siphon generation time can be shortened.

[0010] In addition, since it is easy to generate siphon force without reducing the inner diameter of the first horizontal drain pipe, an increase in the drainage time associated with reducing the inner diameter of the first horizontal drain pipe can be suppressed.

[0011] The pipe structure of the second aspect includes a storage tank that stores the wastewater introduced from the introduction pipe, and the upstream ends of the plurality of first horizontal drain pipes are connected to one storage tank.

[0012] In the pipe structure of the second aspect, the wastewater stored in the storage tank is drained from a plurality of first horizontal pipes. Therefore, compared with a configuration in which only one first horizontal pipe is connected to the storage tank, the wastewater treatment capacity from the storage tank is high. For example, if the upstream side of the introduction pipe is connected to a bathtub, even if a large amount of wastewater flows at once, the wastewater is treated by the plurality of first horizontal pipes, so the wastewater is quickly discharged.

[0013] In the pipe structure of the third aspect, the plurality of first horizontal pipes are arranged in parallel in the horizontal direction, and a center line passing through the center of the arrangement direction of the plurality of first horizontal pipes in plan view is arranged on the extension line of the center line of the introduction pipe.

[0014] In the pipe structure of the third aspect, a center line passing through the center of the arrangement direction of the plurality of first horizontal pipes arranged in parallel is located on the extension line of the center line of the introduction pipe. Therefore, the direction in which the wastewater flows in the introduction pipe and the direction in which the wastewater flows in the first horizontal pipe are the same. Therefore, the momentum of the wastewater is less likely to decay. In addition, since the wastewater is distributed substantially evenly to the plurality of first horizontal pipes, the wastewater can be drained smoothly.

[0015] In the pipe structure of the fourth aspect, the cross-sectional area of the second horizontal pipe is less than the total cross-sectional area of the plurality of first horizontal pipes.

[0016] In the pipe structure of the fourth aspect, the cross-sectional area of the second horizontal pipe is smaller than the total cross-sectional area of the plurality of first horizontal pipes. Therefore, the flow velocity of the wastewater flowing through the second horizontal pipe and the vertical pipe becomes faster than the flow velocity of the wastewater flowing through the first horizontal pipe. Thereby, the siphon generation time can be further shortened.

[0017] In the pipe structure of the fifth aspect, the length of the second horizontal pipe is 1 / 3 or less of the length of the first horizontal pipe.

[0018] In the pipe structure of the fifth aspect, the length of the second horizontal pipe is equal to or less than one-third of the length of the first horizontal pipe. That is, the first horizontal pipe joins near the vertical pipe. With this configuration, the drainage flowing through the first horizontal pipe is immediately led to the vertical pipe after joining in the second horizontal pipe. As a result, compared with the case where the horizontal drawing distance in the second horizontal pipe is long, the pressure loss in the second horizontal pipe is small, and it is difficult to reduce the siphon force.

Advantages of the Invention

[0019] In the pipe structure of the present invention, it is possible to suppress an increase in drainage time while shortening the siphon generation time.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0021] Hereinafter, a pipe 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 mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of components may exist.

[0022] In addition, descriptions of overlapping configurations and reference numerals in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and appropriate changes such as omitting configurations or replacing them with different configurations can be made within the scope of the object of the present invention.

[0023] <Pipe Structure> (Siphon Drainage System) FIG. 1 shows an overview of the piping structure 20 according to this embodiment. The piping structure 20 is a structure of a siphon drainage system that discharges drainage from the plumbing fixture 12 by utilizing siphon force. The piping structure 20 is used, for example, in a multi-story condominium 10 formed in multiple layers.

[0024] The piping structure 20 includes a drain riser 22 that allows drainage to flow downward. A plurality of drain risers 22 are provided at different locations on the plane in the condominium 10. For example, the drain riser 22 is accommodated along the vertical direction (longitudinal direction) within a piping space (also referred to as a pipe space etc.) partitioned by a wall from each dwelling on each floor of the condominium 10, and penetrates the slab 14 of each floor of the condominium 10.

[0025] Each dwelling unit of the condominium 10 is provided with a plumbing fixture 12. The plumbing fixture 12 is, for example, a bathroom unit in which a bathtub 12A and a washbasin 12B are integrated. One end of a drain introduction pipe 24 is connected to the plumbing fixture 12.

[0026] The other end of the drain introduction pipe 24 is connected to a drain chamber 30 described later. Thereby, the drain introduction pipe 24 introduces the drainage discharged from the bathtub 12A and the washbasin 12B of the plumbing fixture 12 into the drain chamber 30. It is preferable that the drain introduction pipe 24 is arranged with a gradient such that the drain chamber 30 side is lower.

[0027] The drain chamber 30 is a storage tank for temporarily storing the drainage introduced from the plumbing fixture 12 via the drain introduction pipe 24 and discharging it to the drain riser 22. The drain chamber 30 is formed of a resin material such as vinyl chloride, for example. A siphon drain pipe 40 is connected to the downstream side of the drainage in the drain chamber 30.

[0028] (Siphon Drain Pipe) As shown in Fig. 2, the siphon drain pipe 40 includes a plurality (two in this embodiment) of horizontal pipes 42 arranged along the slab 14, a horizontal pipe 44, an outflow vertical pipe 46, and a joint member 48.

[0029] The horizontal pipe 42 is an example of the first lateral drainage pipe in the present invention and is a lateral drainage pipe that discharges the drainage discharged from the plumbing fixtures laterally. The horizontal pipe 42 is formed of a pipe with a nominal diameter of 25J (inner diameter of about 28 mm), for example, and is arranged horizontally and without slope along the slab 14. Here, the term "without slope" does not necessarily mean strictly horizontal, but includes those with some steps or slopes along the slab 14. Polybutene The "upstream" ends of each of the two horizontal pipes 42 are connected to the drainage chamber 30. On the other hand, the "downstream" ends of each of the horizontal pipes 42 are connected to a single horizontal pipe 44 via a joint member 48 as an example of a confluence part. The horizontal pipe 44 is an example of the second lateral drainage pipe in the present invention and is a lateral drainage pipe that discharges the drainage introduced from the horizontal pipe 42 laterally. Note that the horizontal pipe 44 and the joint member 48 may be integrally formed.

[0030] The outflow vertical pipe 46 shown in Fig. 1 is a vertical pipe to which the horizontal pipe 44 is connected and that generates siphon force for the horizontal pipe 42. The outflow vertical pipe 46 connected to the horizontal pipe 44 is arranged vertically (in the vertical direction) along the drainage standpipe 22. The outflow vertical pipe 46 reaches the confluence joint 26. The confluence joint 26 is a joint member that joins the drainage from the outflow vertical pipe 46 to the drainage standpipe 22.

[0031] The horizontal pipe 44 and the outflow vertical pipe 46 are configured as a continuous single path without confluence with other drain pipes until the confluence joint 26, and guide the drainage to the drainage standpipe 22. Note that the connection part between the horizontal pipe 44 and the outflow vertical pipe 46 is shown as a continuous vent pipe, but a joint member such as an elbow may be arranged at this vent pipe part. When arranging a joint member, an inspection port or the like can be provided at the joint member as appropriate.

[0032] The horizontal pipe 44 and the outflow vertical pipe 46 are configured as a continuous single path without confluence with other drain pipes until the confluence joint 26, and guide the drainage to the drainage standpipe 22. Note that the connection part between the horizontal pipe 44 and the outflow vertical pipe 46 is shown as a continuous vent pipe, but a joint member such as an elbow may be arranged at this vent pipe part. When arranging a joint member, an inspection port or the like can be provided at the joint member as appropriate.

[0033] The drain chamber 30 is further connected with a ventilation pipe 50, and the ventilation pipe 50 reaches the junction joint 26.

[0034] (Arrangement of the siphon drain pipe) As shown in FIG. 3, the two horizontal pipes 42 are arranged in parallel in the horizontal direction. And the center line passing through the center of the two horizontal pipes 42 in the arrangement direction is arranged on the extension line of the center line CL of the drain inlet pipe 24. Further, the center line of the horizontal pipe 44 is also arranged on the extension line of the center line CL of the drain inlet pipe 24. Note that the two horizontal pipes 42 do not necessarily have to be arranged in parallel depending on the situation of the laying location.

[0035] The total cross-sectional area of the two horizontal pipes 42 is less than the cross-sectional area of the drain inlet pipe 24. Further, the cross-sectional area of the horizontal pipe 44 is less than the total cross-sectional area of the two horizontal pipes 42. The horizontal pipe 44 and the horizontal pipes 42 are set so that the drain flows in full flow, and a siphon force acting in the downstream direction of the drain acts on the drain of the horizontal pipe 44 and the horizontal pipes 42 due to the energy of the siphon head.

[0036] Note that if a siphon effect can be obtained, the total cross-sectional area of the two horizontal pipes 42 may be equal to or greater than the cross-sectional area of the drain inlet pipe 24. Similarly, if a siphon effect can be obtained, the cross-sectional area of the horizontal pipe 44 may be equal to or greater than the total cross-sectional area of the two horizontal pipes 42. When the cross-sectional area changes depending on the location along the axial direction, the cross-sectional area referred to here means the average cross-sectional area.

[0037] Also, the length L1 of the horizontal pipe 44 is set to be 1 / 3 or less of the length of the horizontal pipe 42. Here, the length L1 of the horizontal pipe 44 is the length from the position where the drain introduced from the two horizontal pipes 42 converges inside the joint member 48 to the position of the central axis of the outflow vertical pipe 46 in the state where the horizontal pipe 44 is viewed in plan.

[0038] The length of the horizontal pipe 42 is the length from the position where the wastewater introduced from the two horizontal pipes 42 merges inside the joint member 48 to the drainage chamber 30 when the horizontal pipe 42 is viewed in plan.

[0039] <Function and Effect>

[0040] In the piping structure 20 according to the embodiment of the present invention, the horizontal pipes 42 for discharging the wastewater discharged from the plumbing fixture 12 shown in FIG. 1 merge via a joint member 48 as an example of a merging portion as shown in FIG. 2, and a horizontal pipe 44 is joined to the joint member 48. Then, this horizontal pipe 44 is connected to an outflow vertical pipe 46 which is a vertical pipe. The wastewater flowing through the horizontal pipe 42 merges in the horizontal pipe 44 and is led to the outflow vertical pipe 46. As the wastewater falls in the outflow vertical pipe 46, a siphon force acts on the horizontal pipe 42 and the horizontal pipe 44.

[0041] Here, a siphon force acts on each horizontal pipe 42 as the wastewater after merging falls in one outflow vertical pipe 46. Therefore, a large amount of wastewater gathers in the outflow vertical pipe 46 as compared with, for example, the case where individual outflow vertical pipes 46 are connected to the horizontal pipes 42 respectively. That is, the flow rate of the wastewater necessary for generating the siphon force can be secured quickly. Thereby, the siphon generation time can be shortened.

[0042] In addition, since it is easy to generate a siphon force without reducing the inner diameter of the horizontal pipe 42, an increase in the drainage time associated with reducing the inner diameter of the horizontal pipe 42 can be suppressed.

[0043] That is, in the present embodiment, for example, a pipe body with a nominal diameter of 25J is used as the horizontal pipe 42, and the horizontal pipes 42 merge and the wastewater flows through one horizontal pipe 44 and the outflow vertical pipe 46. Thereby, it is easier to generate a siphon force as compared with a configuration in which the horizontal pipes 42 do not merge. For this reason, a siphon force can be obtained without using a pipe body with a small nominal diameter as the horizontal pipe 42.

[0044] In addition, by using a pipe body with a nominal diameter of 25J, which is a common size for the horizontal pipe 42, conventional products can be used as pipe fixtures and the like.

[0045] In the piping structure 20, the upstream ends of the two horizontal pipes 42 are connected to the drainage chamber 30. As a result, the drainage stored in the drainage chamber 30 is drained from these horizontal pipes. Therefore, the drainage treatment capacity from the drainage chamber 30 is higher compared to a configuration where only one horizontal pipe is connected to the drainage chamber 30.

[0046] Also, even if dirt accumulates or foreign objects clog one of the horizontal pipes 42, drainage can be discharged from the other horizontal pipe 42, thus reducing the risk of drainage failure.

[0047] And in the present embodiment, as shown in FIG. 1, the upstream side of the drainage introduction pipe 24 is connected to the plumbing fixture 12, which is a bathroom unit. Even if a large amount of drainage flows from the bathtub 12A at once, the drainage is processed by the plurality of horizontal pipes 42, so the drainage is quickly discharged.

[0048] On the other hand, for example, when processing the drainage from the bathtub 12A with one horizontal pipe, it is necessary to, for example, increase the nominal diameter of the horizontal pipe. When the nominal diameter of the horizontal pipe is increased, the rigidity of the horizontal pipe becomes high, making it difficult to lay out on the slab 14. Also, it is difficult to transport. Furthermore, it is necessary to ensure a large accommodation dimension in the underfloor space (the vertical dimension from the slab 14 to the lower surface of the floor material not shown).

[0049] In the piping structure 20, as shown in FIG. 3, the center lines of the plurality of horizontal pipes 42 arranged in parallel are located on the extension line of the center line of the drainage introduction pipe 24. Therefore, the direction in which the drainage flows in the drainage introduction pipe 24 and the direction in which the drainage flows in the horizontal pipe 42 are the same (the direction indicated by the arrow T). For this reason, the momentum of the drainage is not easily attenuated. Also, the drainage is roughly evenly distributed to the two horizontal pipes 42, so drainage can be performed smoothly.

[0050] In the piping structure 20, the cross-sectional area of the horizontal pipe 44 is smaller than the total cross-sectional area of the two horizontal pipes 42. Therefore, the flow velocity of the drainage flowing through the horizontal pipe 44 and the outflow vertical pipe 46 becomes faster than the flow velocity of the drainage flowing through the horizontal pipe 42. As a result, the siphon generation time can be further shortened.

[0051] Alternatively, for example, when the horizontal drawing distance of the horizontal pipe 42 is long, it takes more time for the drainage to flow in full flow than when it is short. However, since the siphon force is generated when the horizontal pipe 44 flows in full flow, the siphon force can be generated before the horizontal pipe 42 becomes full flow. As a result, the degree of freedom in the horizontal drawing distance of the horizontal pipe 42 increases, and the degree of freedom in the arrangement of the plumbing fixtures 12 is improved.

[0052] In the piping structure 20, the length L1 of the horizontal pipe 44 is equal to or less than one-third of the length L2 of the horizontal pipe 42. That is, the horizontal pipes 42 merge near the outflow vertical pipe 46. With this configuration, the drainage flowing through the horizontal pipe 42 is immediately guided to the outflow vertical pipe 46 after merging in the horizontal pipe 44. As a result, compared with the case where the horizontal drawing distance in the horizontal pipe 44 is long, the pressure loss in the horizontal pipe 44 is small, and it is difficult to reduce the siphon force.

[0053] It is more preferable that the length L1 of the horizontal pipe 44 is equal to or less than (1 / 4) of the length L2 of the horizontal pipe 42. Thereby, the pressure loss can be further reduced.

[0054] (Other Embodiments) In the above-described embodiment, the drainage is discharged from the drainage chamber 30 by the two horizontal pipes 42, but the embodiment of the present invention is not limited to this. For example, the drainage from the drainage chamber 30 may be discharged from one horizontal pipe 42. In this case, in addition to the horizontal pipe 42, the horizontal pipe 44 merges with a horizontal pipe 42A that flows the drainage from plumbing fixtures other than the plumbing fixture 12 (not shown, for example, a washbasin, a kitchen, a toilet, etc.).

[0055] Further, the drain chamber 30 is not necessarily provided, and the drain from the plumbing fixture 12 may be directly flowed into the horizontal pipe 42. That is, the present invention only needs to have a configuration in which the horizontal pipes through which the drain discharged from these plumbing fixtures merge between one outflow vertical pipe 46 and one or more plumbing fixtures.

[0056] Also, in the example shown in FIG. 3, it is assumed that the center lines of the two horizontal pipes 42 are arranged on the extension line of the center line of the drain introduction pipe 24, but the embodiment of the present invention is not limited to this. For example, the center lines of the two horizontal pipes 42 and the extension line of the center line of the drain introduction pipe 24 may be offset, or may not be parallel to each other.

[0057] Even with such a configuration, the effect of shortening the siphon generation time can be obtained by the confluence of the plurality of horizontal pipes 42.

[0058] Also, in the above embodiment, the length L1 of the horizontal pipe 44 is set to be 1 / 3 or less of the length L2 of the horizontal pipe 42, but the embodiment of the present invention is not limited to this. These lengths can be freely set according to the piping space and the like. Regardless of the length L1 of the horizontal pipe 44, the effect of shortening the siphon generation time can be obtained by the confluence of the plurality of horizontal pipes 42.

Explanation of symbols

[0059] 12 Plumbing fixture, 20 Plumbing structure, 24 Drain introduction pipe (introduction pipe), 30 Drain chamber (storage tank), 42 Horizontal pipe (first horizontal pipe), 42A Horizontal pipe (first horizontal pipe), 44 Horizontal pipe (second horizontal pipe), 46 Outflow vertical pipe (vertical pipe)

Claims

1. A plurality of first horizontal drain pipes arranged in parallel in the horizontal direction and discharging the drain water discharged from the same water circulation device laterally. A confluence section that merges the plurality of first horizontal drain pipes into one. A second horizontal drain pipe connected to the downstream side of the confluence section, discharging the confluent drain water laterally, and having a cross-sectional area less than the total cross-sectional area of the plurality of first horizontal drain pipes. A vertical pipe connected to the downstream side of the second horizontal drain pipe, generating a siphon force in the first horizontal drain pipe and the second horizontal drain pipe by allowing the drain water to flow down. A piping structure comprising the above.

2. Comprising a storage tank for storing the drain water introduced from an inlet pipe. The upstream ends of the plurality of first horizontal drain pipes are connected to one of the storage tanks. The piping structure according to Claim 1.

3. The plurality of first horizontal drain pipes. A center line passing through the center of the arrangement direction of the plurality of first horizontal drain pipes in a plan view is arranged on the extension line of the center line of the inlet pipe. The piping structure according to Claim 2.

4. The length of the second horizontal drain pipe is 1 / 3 or less of the length of the first horizontal drain pipe. The piping structure according to any one of Claims 1 to 3.

5. An outflow vertical pipe connected to the second horizontal drain pipe. And a ventilation pipe connected to the storage tank. The outflow vertical pipe and the ventilation pipe reach a joint member with the vertical pipe. The piping structure according to Claim 2.

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