JP4213322B2 - Pipe for drainage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drainage piping member in which a horizontal branch pipe part is joined to a standing pipe part.
[0002]
[Prior art]
An important point in the drainage system of an apartment house is to drain wastewater from sanitary equipment and others out of the system safely and quickly by natural gravity. That is, as the space in the pipe increases or decreases due to drainage entering the drain pipe, air is supplied or discharged to keep the pipe close to atmospheric pressure, prevent the drain trap from being broken, Is to make it smooth.
The performance of the drainage system is evaluated by the maximum drainage flow rate at which the drainage trap does not break. That is, the drainage performance of the drainage system is the maximum drainage flow rate (liter / second) within a predetermined allowable pipe pressure fluctuation value (usually plus or minus 40 mm water column).
[0003]
In order to enhance the drainage performance, a drainage collecting pipe provided with swirl vanes has been proposed in order to impart swirl to the drainage in the drainage vertical pipe (see, for example, JP-A-8-85898).
[0004]
[Problems to be solved by the invention]
However, in the case where the swirl vane is provided, when washing water is mixed with the drainage, the drainage is agitated by the swirl vane and foams. If the design of the horizontal main pipe is inappropriate, the foam closes the ventilation space in the pipe. As a result, there has been a problem that the pressure fluctuation in the pipe becomes large.
Further, in the case where the swirl vane is provided, there is a problem that the drainage collides with the vane and generates a sound.
[0005]
In addition, if a projecting object such as a swirl blade is provided, the inner diameter of the tube is reduced, which may obstruct the passage of dirt, etc., or dirt may adhere to the blade, and further, it may be difficult to clean the inside of the tube. It was.
Then, an object of this invention is to provide the piping member for drainage which can exhibit drainage performance, without providing protrusions, such as a turning blade.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has taken the following measures. That is, the feature of the present invention is that in the drainage piping member in which the horizontal branch pipe part is joined to the vertical pipe part, the bottom part of the horizontal branch pipe part is provided on the tube axis of the horizontal branch pipe part. On the other hand, a concave groove is formed at a central position in a horizontal direction orthogonal to the drainage flow along the drainage flow and the depth thereof becomes deeper as the vertical pipe portion is approached.
According to the configuration of the present invention, since the waste water flowing into the vertical pipe portion from the horizontal branch pipe portion flows along the concave groove, its streamline is directed downward as compared with the case without the concave groove, The inside of the vertical pipe portion is not blocked by the inflow drainage, a sufficient ventilation space can be secured, and the pressure fluctuation in the pipe can be kept small.
[0007]
In addition, according to the present invention, since there are no protrusions such as the conventional swirl vane, it is difficult for foaming of drainage and noise generation to occur, and furthermore, there are no protrusions, so that cleaning becomes easy.
In addition, it is preferable to form the collar part which protrudes in a standing pipe part in the upper part of the side branch pipe part periphery in the junction part of the said standing pipe part and a side branch pipe part.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The drainage system shown in FIG. 7 is in a middle- and low-rise apartment building up to about 10 floors, and the first atypical pipe 3 which is a drainage piping member according to the present invention is provided in the hole 2 provided in the floor slab 1. The second variant tube 3 is connected to the top of the variant tube 3. A horizontal branch pipe 4 is connected to the first variant pipe 3, and drainage facilities such as a kitchen, a bath, a washing machine, and a wash basin (not shown) are connected to the horizontal branch pipe 4. A toilet bowl 5 is connected to the second variant pipe 3. Upright tubes 6 are connected to the lower end portion of the first variant tube 3 and the upper end portion of the second variant tube 3, respectively. The first and second modified tubes 3 are the same, and the modified tube 3 is formed by connecting a horizontal branch tube portion 8 to a stand tube portion 7.
[0009]
Since the hole 2 of the floor slab 1 is backfilled with mortar or the like, it is preferable that the diameter a of the hole 2 is as small as possible, and the protruding amount b of the side branch pipe portion 8 is also compact in connection with the toilet 5 or the like. In order to reduce the size, a material that is as short as possible is preferable.
FIG. 1 is a detailed cross-sectional view of the atypical pipe 3, and a concave groove 9 along the flow of drainage from the side branch pipe part 8 toward the vertical pipe part 9 is formed on the bottom surface of the side branch pipe part 8. Is formed. As shown in FIG. 2, the concave groove 9 is formed at a central position in the horizontal direction perpendicular to the tube axis of the lateral branch pipe portion 8, and the depth increases as the vertical pipe portion 7 is approached. It is formed to become.
[0010]
Note that the curve indicated by the phantom line in FIG. 1 indicates the bottom surface position of the horizontal branch pipe portion of the conventional irregular pipe having no concave groove. R of the concave groove 9 is preferably as large as possible.
When the groove 9 is provided in the horizontal branch pipe portion 8, as shown by the solid arrow in FIG. 1, the flow of the drainage flows without peeling from the inner surface of the pipe, so that a sufficient ventilation space in the pipe can be secured. On the other hand, as shown by the dotted arrow, the conventional drainage flow does not have a ditch, so it separates from the inner surface of the tube, reaches the opposite tube wall, and closes the tube. Can not do it.
[0011]
That is, as shown in FIGS. 3 and 4, the flow of the drainage of the horizontal branch pipe portion 8 flows into the concave groove 9, so that the flow on both sides of the concave groove 9 tends to approach the horizontal central position of the horizontal branch pipe portion 8. However, since it rides on the flow at the central position and pushes it downward, the flow toward the opposite pipe wall at the central position is suppressed downward, and it is assumed that the flow flows without peeling from the inner surface of the pipe. . As a result, it is possible to secure the ventilation space S in the portion indicated by the oblique lines in FIG.
In FIGS. 5 and 6, a flange 10 protruding into the vertical tube portion 7 is formed at the upper portion of the peripheral edge of the horizontal tube portion at the junction between the vertical tube portion 7 and the horizontal tube portion 8. . The flange portion 10 has the largest protrusion amount from the inner surface of the standing tube portion 7 at the horizontal center position orthogonal to the tube axis of the lateral branch tube portion 8, and protrudes as it reaches the left and right ends. It is formed to reduce the amount. The maximum protrusion amount toward the vertical tube axis is 5 mm.
[0012]
By providing the flange portion 10 in this manner, it is possible to prevent the drainage flow from the vertical pipe 6 from flowing backward to the side branch pipe portion 8. And by this dredging effect, the drainage from the vertical pipe 6 and the drainage from the side branch pipe 4 can be smoothly joined, and foaming is suppressed. Further, a large ventilation space to the lateral branch pipe portion 8 can be obtained.
In the conventional structure having no concave grooves, the drainage capacity of 10 stories was 3.5 liters / second, but according to the present embodiment, it was improved to 6 liters / second.
[0013]
Moreover, according to this Embodiment, compared with what provided the conventional swirl | wing blade, reduction of a sound, reduction of foaming are achieved, and cleaning is facilitated.
Further, it is not necessary to increase the dimensions a and b shown in FIG.
The present invention is not limited to the one shown in the above embodiment, but is applicable to a Y-shaped irregular pipe as shown in FIG. 8, a T-shaped irregular pipe as shown in FIG. 10, and other drainage piping members. Applicable.
In addition, what is shown in FIG. 9 is a top view which shows the detail of the ditch | groove shape in the unusual shape pipe | tube of FIG.
[0014]
【The invention's effect】
According to the present invention, drainage performance could be improved without providing conventional swirl vanes. Moreover, compared with the thing provided with the conventional swirl | wing blade, reduction of a sound and reduction of foaming are achieved, and cleaning is facilitated.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a modified pipe showing an embodiment of the present invention.
FIG. 2 is an explanatory view showing a concave groove shape of a lateral branch pipe portion at positions A, B, C, and D in FIG. 1;
FIG. 3 is a transverse cross-sectional view of an atypical tube showing an embodiment of the present invention, and is an explanatory view of the action of a concave groove.
FIG. 4 is an explanatory view of the operation of a concave groove.
FIG. 5 is a longitudinal sectional view of a modified pipe showing another embodiment of the present invention.
6 is a cross-sectional view taken along line EE of FIG.
FIG. 7 is a drawing of a drainage system using drainage piping members according to the present invention.
FIG. 8 is a plan view of another modified tube to which the present invention can be applied, in which FIG. 8 (A) is a front view, FIG. 8 (B) is a side view, and FIG. X-ray sectional view, (D) is a plan view.
FIG. 9 is an explanatory view showing a groove shape at each position obtained by equally dividing the reference position and A to K in FIG. 8A, and FIG. 9 is a perspective view of the groove. .
FIG. 8 is a plan view of another modified tube to which the present invention is applicable.
[Explanation of symbols]
3 Piping member (Atypical pipe)
7 Standing pipe part 8 Side branch pipe part 9 Groove 10

Claims (2)

In the drainage piping member in which the horizontal branch pipe part is joined to the vertical pipe part, the bottom part of the horizontal branch pipe part, at the horizontal central position orthogonal to the tube axis of the horizontal branch pipe part, A drainage piping member characterized in that a concave groove is formed along the flow of drainage and the depth of which increases as the vertical pipe portion is approached. The drainage piping member according to claim 1, wherein a flange projecting into the vertical pipe portion is formed at an upper portion of a peripheral branch pipe portion periphery at a joint portion between the vertical pipe portion and the horizontal branch pipe portion.

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