JP3154813B2 - Drainage fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage joint for connecting a vertical drainage pipe and a horizontal branch pipe forming a drainage pipe provided in a building.

[0002]

2. Description of the Related Art Conventionally, as a drainage piping method for a building, a single-pipe drainage pipe (a vent pipe is only an extended vent pipe) and a two-pipe drainage pipe (having a drainpipe in addition to a drainpipe) are known. And are generally adopted. However, each of these conventional methods has advantages and disadvantages as shown in Table 1 below.

[0003]

[Table 1] Therefore, in recent years, in order to solve the above-described drawbacks of the single-pipe drainage pipe, the body is larger than a normal joint, and a swirling flow is provided inside the drainage from the upper standing pipe and the horizontal branch pipe. A drain pipe is connected to a drain pipe using a special fitting provided with a blade (for example, Suzumi Chemical Co., Ltd. trade name Eslon AD fitting, Kubota collective fitting, etc.) and flows down the drain pipe. The swirling flow is given to draining water
As shown in the publication, a spiral rib is provided on the inner surface of the drainage pipe, and the spiral rib gives a swirling flow to the drainage flowing down the drainage pipe, and an air core is always provided in the drainage vertical pipe to drain the water. I try to improve my ability.

[0004]

However, in the system in which the drainage flows down as a swirling flow as described above, the drainage flows down while forming a thin water film 101 along the pipe wall as shown in FIG. The water film 101 flows down in a curtain shape on the front surface of the inflow port 104 of the horizontal branch pipe 103 connected to the vertical drain pipe 102. Therefore, the inside of the horizontal branch pipe 103 is made airtight by the water film 101, and pressure fluctuation occurs,
There is a problem that a trap of a sanitary fixture such as a toilet bowl or hand washing connected to the horizontal branch pipe 103 is broken, and odor in the drainage pipe flows into the room.

On the other hand, in Japanese Patent Publication No. 57-5942, the diameter of the joint body is made larger than that of the drainage vertical pipe, and the drainage that has flowed down in the drainage vertical pipe as a swirling flow is spread in the joint part in a trumpet shape. As a water film, the air communication between the horizontal branch pipe and the vertical drain pipe is measured. However, in this joint structure, when the flow rate of drainage increases and the thickness of the water film increases,
Even if the water film enters the inside of the joint, it does not form a sump, and there is a possibility that the inflow port of the horizontal branch pipe is blocked by the water film.

[0006] In view of such circumstances, the present invention is to prevent the drainage inlet of the horizontal branch pipe from being blocked by the water film of the drainage flowing through the drainage vertical pipe even if a large amount of wastewater flows into the vertical drainage pipe. It aims to provide a drainage fitting without.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a drainage joint according to the present invention is provided with water formed by drainage flowing down in a swirling flow along the inner wall surface of a vertical drainage pipe. A draining projection that cuts a part of the membrane, the draining projection having a joint above the pipe bottom of the drainage inlet from the horizontal branch pipe so that the tip does not project into the water-permeable vertical section of the drainage vertical pipe. It is configured to protrude from the inner wall surface of the main body.

In the above configuration, the shape of the joint main body is not particularly limited. For example, it is preferable that the inner diameter of a portion of the horizontal branch pipe facing the inflow port is larger than the inner diameter of the vertical pipe. When an ordinary pipe without a spiral rib is used for the vertical pipe, a pipe having a function of rotating drainage by providing inclined blades on the inner surface of the drainage joint is preferable. In the case of a drainage joint having a joint body having such a shape, for example, FIG.
As shown in FIG. 3, a draining protrusion 11 can be provided.

That is, the draining protrusion 11 is formed as shown in FIG.
As shown in FIGS. 2A and 2B, the joint main body 12 may be protruded from an inner wall surface 12a above a horizontal branch pipe connection portion 13 serving as an inflow port for drainage from the horizontal branch pipe, or as shown in FIG. As shown in FIGS. 3 and 4B, a trumpet-shaped skirt 15 is provided below the vertical pipe connection portion 14 of the joint main body 12, and the skirt 15 is projected from the inner wall surface of the skirt 15 or shown in FIGS. As seen in
The lower end of the vertical pipe connecting portion 14 may be provided anywhere in the circumferential direction of the joint main body 12 by projecting from a tapered surface 16 formed by gradually increasing the diameter. Alternatively, it is preferable to provide them at corresponding positions.

On the other hand, as shown in FIG. 4, when the joint main body 12 is of a joint type, the drainage projecting portion extends from the upper inner wall surface of the horizontal branch pipe connection portion 13 serving as an inlet for drainage from the horizontal branch pipe. 11 can be protruded. Although the shape of the draining protrusion 11 is not particularly limited, for example, FIG.
One having a cross-sectional shape as shown in FIG. Further, the number of the draining protruding portions 11 may be one or two or more for one horizontal branch pipe.

The drainage vertical pipe connected to the drainage joint is not particularly limited, but a pipe with an internal spiral rib is particularly preferable. For the tube with the inner spiral rib, the height of the rib is 1/10 or less of the pipe diameter (particularly preferably 2/100 to 5/100).
/ 100), the spiral pitch of the rib is 3 to 20 times the diameter (particularly preferably about 3 to 10 times), and the number of ribs is 4
25 to 25 (particularly preferably about 10 to 14) are preferable, and the material is not particularly limited.
Synthetic resin pipes such as PVC pipes, cast iron pipes, PVC-lined steel pipes,
In the case of a fire-resistant building, a thin-walled PVC-lined steel pipe capable of penetrating a fire protection compartment is particularly preferable in the case of a fire-resistant building.

The cross-sectional shape of the rib is not particularly limited as long as it does not hinder the swirling of the drainage, and examples thereof include a triangular, semicircular, square, and petal shape.

[0013]

According to the above construction, as shown in FIG. 6, the waste water flowing down the vertical pipe 2 while spirally turning is discharged to the water film 2.
1, the water film 21 is cut off by the draining projection 11, and an air window 22 is always formed between the horizontal branch pipe and the drain vertical pipe. It is maintained at atmospheric pressure by communicating with an air core provided in the center of the drainage vertical pipe.

Further, since the tip of the draining projection 11 does not enter the inside of the water-permeable vertical section of the drainage vertical pipe 2, solid dirt falling in the vertical pipe does not catch on the draining projection 11. Fall in the drain pipe.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (Example 1) A tube with a diameter of 100A and an inner spiral rib having a height of 3.5 mm, a spiral pitch of 600 mm, a number of strips of 12, and a triangular cross section formed on the inner surface as the vertical pipe 2, horizontal As a branch pipe 3, a pipe without a rib having an inner diameter of 50 mm, the diameter of which is gradually reduced as the large-diameter portion becomes lower at 200 mm to become the same diameter as the pipe with the inner spiral rib, as shown in FIG. A drainage pipe 4 as shown in FIG. 7 was formed by using a drainage joint (special joint) 1 as shown in FIG. (Example 2) A one-pipe type drain pipe 4 as shown in FIG. 7 was formed in the same manner as in Example 1 except that a junction type joint as shown in FIG. 4 was used as the drainage joint 1. . (Example 3) As a drainage joint 1, a joint type joint as shown in FIG. 4 was used, and a two-pipe drainage line 5 as shown in FIG. 8 was formed. Note that the vertical pipe and the horizontal branch pipe are the same as those in the first embodiment.
The same one as described above was used. (Example 4) Example 1 is the same as Example 1 except that a pipe without ribs was used as the drainage vertical pipe 4 and a drainage joint 1 in which inclined blades for forming a swirling flow were provided on the inner surface of the drainage joint 1 of Example 1 was used.
Similarly, a one-pipe type drain pipe 4 as shown in FIG. 7 was formed. (Comparative Example 1) A one-pipe type drain pipe 4 as shown in FIG. 7 was used in the same manner as in Example 1 except that the drainage joint 1 of the embodiment 4 without the drainage protrusion 11 was used. Formed.

The drainage pipes formed in Examples 1 to 4 and Comparative Example 1 were subjected to a steady flow drainage experiment as shown in FIG. The results are shown in Table 2 below. Note that in FIG.
Is a pressure gauge, 52 is a flow meter, and 53 is an elevated water tank. In addition, as a criterion, considering the water depth of the trap (50 mm or more), the fluctuation in the pipe pressure was set within ± 25 mmaq. Table 2
The medium and allowable height refers to the allowable floor height in a general apartment house (when one vertical drainage pipe is connected to a horizontal branch pipe that is a drainage pipe for one house on each floor) by the DIN route method.

[0017]

[Table 2]

[0018]

Since the drainage joint according to the present invention is constructed as described above, the wastewater flowing down the vertical pipe while spirally swirling flows into the joint while forming a water film. The water film is cut off by the water draining projection, and the horizontal branch pipe and the air core of the drain vertical pipe are always in communication with each other and are kept at atmospheric pressure.

Therefore, even if a large amount of wastewater flows down the vertical pipe, the trap of the sanitary ware such as a toilet or a handwash connected to the horizontal branch pipe is not broken, and the odor in the drain pipe flows into the room. No more. In addition, there is no possibility that solid waste or the like that falls along with the drainage in the drainage pipe is caught by the drainage projection and the drainage pipe is not clogged.

[Brief description of the drawings]

1 shows a first embodiment of a drainage joint according to the present invention, wherein FIG. 1 (a) is a longitudinal sectional view and FIG. 1 (b) is a sectional view taken along line AA of FIG. 1 (a).

FIG. 2 shows a drainage joint according to a second embodiment of the present invention, wherein FIG. 2 (a) is a longitudinal sectional view and FIG. 2 (b) is a sectional view taken along line BB of FIG. 2 (a).

FIG. 3 shows a third embodiment of a drainage joint according to the present invention, wherein FIG. 3 (a) is a longitudinal sectional view thereof, and FIG. 3 (b) is a sectional view taken along line CC of FIG. 3 (a).

FIG. 4 is a sectional view showing a drainage joint according to a fourth embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of a cross-sectional shape of a draining protrusion.

FIG. 6 is a diagram illustrating a state where a water film is drained by a draining protrusion.

FIG. 7 is a piping diagram for explaining a one-pipe drainage pipe formed in an example.

FIG. 8 is a piping diagram illustrating a two-pipe drainage pipe formed in an example.

FIG. 9 is a piping diagram of an experimental apparatus used for an evaluation test of drainage pipes formed in Examples and Comparative Examples.

FIG. 10 is a diagram illustrating a state of formation of a water film of a conventional drainage pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage joint 2 Drainage vertical pipe 3 Horizontal branch pipe 11 Draining protrusion 12 Joint main body 17 Drainage inlet 21 Water film 12a Inner wall surface

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Claims (1)

(57) [Claims] In a drainage joint having a connection port for a drainage vertical pipe and a horizontal branch pipe, a part of a water film formed by drainage flowing down in a swirling flow along an inner wall surface of the drainage vertical pipe is cut. A draining protrusion is provided on the inner wall surface of the joint body above the bottom of the drainage inlet from the horizontal branch pipe so that the tip does not project into the water-permeable cross section of the drainage vertical pipe. A drainage joint characterized by being provided.