JP2002121787A - Drain system in building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain system for building to be mainly applied to a multiple dwelling house. SOLUTION: This drain system comprises a falling main pipe penetrating floors, apparatus drain pipes introduced from kitchen and sanitary apparatuses in each floor, and a confluent part joint for connecting the apparatus drain pipes to the falling main pipe. The level of the confluent part joint is set to be lower than the level of a floor slab on the draining floor to provide a vertical speed component to fluid in the apparatus drain pipe for letting it to be combined with fluid in the falling main pipe. The apparatus drain pipes are disposed roughly at a constant interval around the falling main pipe to be connected to the confluent part joint. An inner wall of the confluent part joint is formed as a concave surface toward a center part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new construction drainage system mainly for an apartment house.

[0002]

2. Description of the Related Art A conventional building drainage system for a condominium is:
Normally, drainage from the plumbing equipment on each floor, such as a kitchen or wash basin, is connected to the drainage pipe (hereinafter referred to as drainage pipe). In general, it was led to a junction joint (hereinafter, referred to as a joint) with a gradient of and joined on the same floor as the plumbing fixture. Then, at this junction, they merge at right angles to the standpipe or merge at a slight angle, but this joint uses a large capacity, especially one with a large horizontal cross-sectional area. . For this reason, the joint was heavy and expensive. In addition, a large space is required, and the degree of freedom in design tends to be lost. Furthermore, drainage pipes must be thick and obey standard slopes, which is a bottleneck in architectural planning. Even if water leaks due to clogging or aging of drainage pipes, repairs can be made without destroying the interior of the building. In addition, renewal of drainage pipes has to be discontinued and enormously costly.

[0003] In other words, in the conventional building drainage system, the vertical velocity component of the fluid flowing through the drainage pipe is extremely small, and at the junction with the standing pipe, the fluid occupied by the drainage pipe has a very large pipe cross-sectional occupancy. The ventilation resistance at the time of merging with the fluid descending in the vertical stack becomes abnormally large. For this reason, interference with the fluid flowing through the vertical pipe, which occurs when the fluids flowing through the drain pipe merge, leads to an increase in negative pressure inside the pipe, which causes trap breakage and abnormal noise. These drawbacks are basically that the vertical velocity of the fluid flowing in the vertical pipe passing through each floor and the vertical velocity component of the laterally flowing fluid that is drainage from various instruments at each floor are combined at the junction or joint. The reason for this is that a large difference is caused in the negative pressure, which results in the trap being opened and an abnormal sound being generated. For this reason, it was necessary to increase the size of the joint, which also increased the cost. In addition, if the trap is broken, the sanitary equipment is not suitable and a heavy burden is imposed on maintenance. Furthermore, since the drainage of the equipment is made into an open channel flow and merges with the vertical pipe at any time, the pipe shape is large and the pipe gradient is required at all parts, making it difficult to design, construct, maintain, and renovate and renew. . And it is virtually impossible to renew drainage pipes.

[0004] In view of the above-mentioned conventional techniques, the present inventor has proposed a new technique in which the flow of the fluid in the drainage pipe is made to be a full-flow pressure and a siphon flow. That is, the content of the proposal is an architectural drainage system consisting of a standing pipe penetrating each floor, a drain pipe led from a plumbing fixture of each floor, and a joint directly connecting the standing pipe to the standing pipe, wherein the level of the joint is Is lowered below the level of the drainage floor slab, the vertical velocity component is sufficiently imparted to the fluid in the drainage pipe, and then combined with the fluid in the vertical pipe.

[0005] In the proposed technique, the drainage from each plumbing device is performed in an independent pipe, and a vertical velocity component is increased to join the fluid in the vertical pipe, so that the so-called ventilation resistance is significantly reduced. It became something. For this reason, the negative pressure generating action in the pipe is extremely reduced as compared with the conventional building drainage system. And the fluid in the drainage pipe may be a relatively thin pipe because it becomes a full flow due to the siphon phenomenon,
In addition, there is no need to provide a gradient toward the standing pipe. Conversely, drainage can be sufficiently performed even with a slight reverse gradient.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to further improve the above-mentioned proposed construction drainage system, and more specifically, a joint for joining drainage from each plumbing fixture to a vertical pipe. Is a new proposal.

[0007]

SUMMARY OF THE INVENTION The present invention is characterized by a drain stack penetrating each floor, an appliance drain pipe guided from a plumbing device on each floor, and a junction joint for connecting the appliance drain pipe to the drain stack. In the drainage system, the level of the junction joint is lowered from the level of the drainage floor slab, the vertical velocity component is sufficiently given to the fluid in the appliance drainage pipe, and then combined with the fluid in the drainage drainpipe. An appliance drainage pipe is arranged at substantially equal intervals around the pipe and connected to the junction joint, and the inner wall of the junction joint has a concave surface facing the center, preferably a curved surface drawn by a cosine curve. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A drainage system comprising a standpipe that penetrates each floor, a drainpipe led from a plumbing device of each floor, and a joint directly connecting the standpipe to the standpipe, drains the level of the joint. According to a drainage experiment in an architectural drainage system that lowers the level below the floor slab and gives sufficient vertical velocity components to the fluid in the drainpipe, then merges with the fluid in the vertical pipe, it was found that the diameter of the instrument drainpipe was reduced, For this reason, it is possible to effectively utilize the space under the floor with ease of the workability.

[0009] By adopting the joint of the present invention, the fluid from the appliance water distribution pipe and the fluid from the standing pipe are joined without great resistance, and the inner wall of the joint is formed as a concave curved surface. Fluid from the instrument drain pipe which collides with this part from above is easily directed toward the riser side fluid, preferably while being swirled with respect to the riser side fluid.
To merge at an angle of about 20 degrees,
The joining is easy, and the sound of collision between the fluid and the joining joint is extremely reduced. That is, changing the direction of the flow from the instrument drainage pipe without disrupting it causes a swirl flow accompanying the rotation of the earth, and since the swirl flow occurs around the fluid from the vertical pipe, the merging occurs. Also has the advantage of being extremely smooth.

[0010] The concave curved surface is preferably formed by a cosine curve surface. The upper part of the inner surface of the junction is the maximum width of the cosine curve, and the lower part of the junction is the minimum width of the cosine curve. , The relationship between amplitude and period is 1:
15-30, preferably about 1: 20-25. The ratio between the diameter of the upper portion of the inner surface of the junction and the length in the vertical direction is preferably 1.5 to 2.5.

If the connecting portion of the instrument drain pipe with the joint of the junction is movable up and down, the collision position of the fluid on the concave curved surface can be changed, and the direction of the fluid and the flow velocity thereof can be changed to some extent. It is possible, and the merging of both fluids can be further smoothly performed. Further, if a large number of hemispherical projections having a diameter of 5 to 8 mm are formed on the inner surface of the joint part, a function of cleaning the surface can be added, and the generation and stagnation of scale on this curved surface can be prevented.

When referring to the drain pipe, since the independent flexible pipes are basically used, the pipe does not need to have a large capacity.
A polybutene tube of mm is sufficient, and the connection to each instrument is sufficient with this one type of tube. In particular, a one-touch connection method has been developed for polybutene tubes, and it is optimal to use this connection method. More specifically, the drainage from each fixture is connected independently to a flexible tube, which is placed on a floor slab,
And it is connected to the joint at a level lower than each floor. Thus, flexible tubing is initially bent horizontally and then vertically bent. For this reason, the fluid in the flexible pipe merges with the fluid in the standing pipe at a high speed full flow.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction drainage system of the present invention will be described below in more detail with reference to the drawings. FIG. 1 is a conceptual diagram of the building drainage system, where 1 and 2 show floor slabs on each floor,
Reference numeral 3 denotes a pipe shaft wall. A standing pipe 4 having a diameter of 100 mm penetrates each floor, and a drain pipe 6 from a plumbing device 5 is connected to the standing pipe 4. In this figure, a basin 5 is shown as an instrument, to which a polybutene tube 6 having a diameter of 20 mm is connected. Of course, the polybutene tube is also connected to other devices not shown. The polybutene pipe 6 is stretched in the horizontal direction on the floor slab 2 without gradient, reaches the standpipe 4, changes its direction downward, and is connected to the joint 7 of the junction with the standpipe 4 as it is. The polybutene tube 6 may be stretched as it is, or a bent portion may be formed by using a bent tube 8.

In this example, the joint 7 is provided near the floor slab 1 downstairs, and the tip of the polybutene pipe 6 is connected to a peripheral pipe 7b erected around the standpipe 4. You. That is, the junction joint 7 surrounds the standing pipe 4 and includes a plurality of peripheral pipes 7b around the standing pipe 4.
For example, a push lock described later is attached to b, and the tip of the polybutene tube 6 is connected to b.

In this example, the height difference from the floor slab 2 to the junction 7 is 2.5 m. Therefore, the drainage fluid in the stack pipe 4 is accelerated in the vertical direction and falls vertically (having a substantially constant flow rate), whereas the drainage fluid from the appliances on each floor is discharged onto the floor slab 2 by the polybutene pipe 6. Flows laterally, and then increases the velocity component in the vertical direction by a drop (2.5 m) from the junction joint 7, and merges with the fluid of the vertical pipe 4 in the junction joint 7. The merging of both is done without difficulty.

FIG. 2 is a cross-sectional view of the joint 7 of the converging portion.
And a lid 7A around which a peripheral pipe 7b connected to the drain pipe 6 is formed. The lower portion is a central lower tube 7B connected to the upright tube, between which a cross-section inner surface 7f is connected by a reverse bell-shaped cylindrical body 7C having a cosine curve. In this example, the inverted bell-shaped cylindrical body 7C has an inner surface 7 that forms a cosine curve curve with a quarter period.
f, the length of which is approximately twice as long (2D) as the diameter D of the lid 7A. Therefore, the waste water flowing down from the drain pipe 6 collides with the cosine curve surface 7f and changes its direction slightly toward the center. A swirling flow is formed, which merges as it is.

It is preferable that the peripheral pipe 7b be slidable with the lid 7A, so that the collision position with the cosine curve surface 7f can be changed. Further, it is preferable that the lid 7A and the inverted bell-shaped cylindrical body 7C can be detached, thereby facilitating maintenance.

FIG. 3 shows a push lock mechanism 20 suitably used for connecting drainage pipes of the present invention, drainage pipes and uprights at joints of junctions, and connection between drainage pipes and pipes on the instrument side. That is, the grab ring 22, the washer 23, the O
A ring 24 and a cap 25 for supporting them are screwed to the socket 21. The socket 21 is formed with a female thread portion 26, which is connected to, for example, a pipe (not shown) on the instrument side around the water. On the other hand, the polybutene tube 6 in which the collar 27 is fitted inside the tip of the cap 25 is inserted, and the grab ring 22 cuts into the outside of the polybutene tube 6 and is connected. The connection between the two is secure and the work is very simple.

[0019]

According to the present invention, as described above, the fluid from the drain pipe is swirled with the fluid in the vertical pipe, and the merge is made without difficulty. Also, noise during drainage has been reduced.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a building drainage system.

FIG. 2 is a side view showing an example of the joint of the junction according to the present invention.

FIG. 3 is a sectional view showing a push lock mechanism.

[Explanation of symbols]

 1, 2 floor slab, 3 pipe shaft wall, 4 riser pipe, 5 plumbing fixture, 6 drainage pipe (polybutene pipe), 7 junction joint, 7A lid, 7B lower central pipe, 7C reverse bell-shaped tubular body, 7b perimeter pipe, 7d central upper pipe, 7f inner surface, 8 bend pipe, 20 push-lock mechanism, 21 socket, 22 grabbling, 23 washer, 24 O-ring, 25mm cap, 26mm internal thread, 27mm collar.

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[Procedure amendment]

[Submission date] November 8, 2000 (200.11.
8)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (8)

[Claims] 1. A drainage stack penetrating each floor, an appliance drainage pipe guided from a plumbing device on each floor, and a junction joint for connecting the appliance drainage pipe to the drainage stack. Lower than the level of the drainage floor slab, apply sufficient vertical velocity component to the fluid in the instrument drainpipe, and then merge with the fluid in the drainpipe, drain the instrument at approximately equal intervals around the drainpipe An architectural drainage system characterized in that a pipe is arranged and connected to a junction joint, and the inner wall of the junction joint has a concave curved surface toward the center. 2. The building drainage system according to claim 1, wherein the concave curved surface is a curved surface drawn by a cosine curve. 3. The architectural drainage system according to claim 2, wherein the upper part of the inner surface of the joint is the maximum width of the cosine curve, and the lower part of the joint is the minimum width of the cosine curve. 4. The architectural drainage system according to claim 1, wherein a ratio of a diameter of an upper portion of an inner surface to a length in a vertical direction of the junction is 1.5 to 2.5. 5. The architectural drainage system according to claim 1, wherein the fluid from the appliance drainage pipe is combined with the fluid from the riser pipe while swirling in the junction joint. 6. The architectural drainage system according to claim 1, wherein the fluid from the appliance drain pipe is obliquely joined to the fluid from the vertical stack by about 10 to 20 degrees. 7. The architectural drainage system according to claim 1, wherein the connecting part of the appliance drainage pipe with the joint of the junction is vertically movable. 8. The building drainage system according to claim 1, wherein a large number of hemispherical projections having a diameter of 5 to 8 mm are formed on the inner surface of the junction.