JPS6016691Y2 - Drain pipe piping structure - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the piping structure of drain pipes.

Waste water from collective drainage equipment in buildings such as hotels and condominiums, i.e. washrooms, bathrooms, toilets, kitchens, etc., is sent to standpipes via drainage traps, and multiple of these standpipes are combined into one horizontal main pipe. They are piped together so that they come together.

In this case, when the drainage water flows down the vertical pipe in a full state and collides with the flow in the horizontal main pipe, and the horizontal main pipe becomes full, negative pressure is created in the vertical pipe, and the water seal of the trap is broken. This causes the odor inside the pipe to flow back.

In order to prevent this backflow phenomenon, conventionally, as shown in Figure 1, the horizontal main pipe of the drainage pipe system was composed of a horizontal main pipe 1' for ventilation and a standpipe 2' communicating with this horizontal main pipe 1'. In the appropriate place and in the standpipe at the final end of the horizontal main pipe, an irregularly shaped pipe (branch pipe) 3' such as a Y, TY, or T shape is installed.

4' was provided, and the opening of this irregularly shaped pipe was communicated with the atmosphere to prevent negative pressure inside the standpipe 2'.

However, in the case of the above-mentioned conventional example, generation of negative pressure cannot be completely prevented, and furthermore, a deformed pipe (branch pipe) for venting is required, resulting in troublesome piping.

Note that the reference numeral 5' indicates a ventilation pipe.

This idea eliminates the drawbacks of the conventional piping structure mentioned above, and eliminates the need for the irregularly shaped pipes that were conventionally used for ventilation by using a single drop pipe with a vent at the junction of the vertical pipe and horizontal main pipe. In addition, it is an object of the present invention to provide a piping structure of a drain pipe that can effectively take out air from a gathering part.

An embodiment of this invention will be described below based on the accompanying drawings.

In Fig. 2, 1 is a horizontal main pipe, and a plurality of standpipes 2 are connected to this horizontal main pipe 1, and a return date slip pipe 3 is attached to the joint between the horizontal main pipe 1 and the standpipes 2. There is.

Further, a vent pipe 5 is connected to this vent pipe with a vent hole.

Figure 3 is an explanatory diagram when two pieces of vent pipe 3 are installed at the joint between the horizontal main pipe 1 and the standpipe 2.
The other one is a 90° Y diameter reducing pipe.
It is attached to pipe 9.

The single drop pipe 3 with a return port has a base 10 connected to each of the Y pipes, and a head 11 connected to the short straight pipe 12, respectively.

Further, a 45° bend pipe 13 and a standpipe 2 are connected to the short straight pipe 12, respectively.

Further, the reference numeral 13 indicates a vent provided in the vent-equipped single-fall pipe 3.

Referring to FIG. 4, the shape of the vent-equipped single drop pipe 3 used in this invention and the connection structure of this single drop pipe will be explained as follows.

The base 10 of the vent-equipped single-fall pipe 3 and the head 11 having a smaller diameter than the base 10 are formed with only the inner surface 14 of one side wall being on the same plane, and there is a stepped space having a step H with the center as a boundary. It is connected with C.

Further, the head 11 of the other side wall facing this one side wall inner surface 14
A vent hole 13 is provided in the connecting portion 15 that is connected to the connecting portion 15 .

The base 10 and the Y pipe 8 and the head 11 and the short straight pipe 12 are aligned so that their axes 16 and 17 are aligned, and the Y
Flange 18 of the tube and flange 19 provided on the head 11
and are tightly connected by a connector 20.

In addition, 21 indicates a bolt/nut for connection, and 22 and 23 indicate a packing, respectively.

Therefore, the Y-tube 8, the vent-equipped single-piece pipe 3, and the short straight pipe 12 are connected with one side wall inner surface 14 on the same plane with a predetermined eccentricity r.

The operation of this invention is explained as follows.

In FIG. 5, a short straight pipe 12 connected to a standpipe (not shown)
The drainage water W flowing down inside is ventilated into single drop pipes 3 and Y.
It is discharged into the horizontal main pipe 1 through the pipe 8, but at this time, the stepped space C formed in the vent pipe 3 and the connecting part 15 are discharged.
Since the air communication portion C' is always maintained in the horizontal main pipe 1 by the vent hole 13 formed in the main pipe 1, negative pressure is not generated in the stand pipe or trap (not shown).

With the above-mentioned configuration, this invention has the above-mentioned structure, so that even if the water flows down from the standpipe at full capacity and the flowing sewage collides with the drainage water flowing in the side main pipe and the side main pipe becomes full, the space inside the vented drop pipe 3 will be maintained. Because of the stepped space C provided in the one-sided pipe, there is no blockage, and the air is reliably removed and the inside of the vertical pipe does not become under negative pressure.

Moreover, the conventional deformed pipe (branch pipe) for venting is no longer required, and the piping structure is significantly simplified.

Furthermore, since the base and head of the vent-equipped drop pipe 3 are eccentrically connected, drainage can flow smoothly in the standpipe.

Note that the connection tube to the base and head of the vent-equipped drop-down tube is not limited to this embodiment, and can be arbitrarily selected.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of piping showing a conventional example, Fig. 2 is a schematic diagram of piping showing an embodiment of this invention, Fig. 3 is a plan view showing an enlarged part of Fig. 2, and Fig. 4 is a schematic diagram of piping showing an embodiment of this invention. 3 is a sectional view taken along the line IV-IV of FIG. 3, showing the joint structure of the vent-equipped single drop pipe, and FIG. 5 is an explanatory view of the operation. 1...Horizontal main pipe, 2...Standing pipe, 3...
...Single drop pipe with vent, 10...Base, 11
...Head, 13...Vent, 14...
...Inner surface of one side wall, 15...Connection part, C...
...Dan space.

Claims (1)

[Scope of utility model registration request] A piece with a ventilation hole, in which a base and a head having a smaller diameter than the base are formed on the same inner surface of one side wall, and a ventilation hole is formed in a connecting part that connects with the head of the other side wall facing the inner surface of the one side wall. A water distribution pipe piping structure characterized by a horizontal main pipe connected to the base of the drop pipe and a stand pipe connected to the head.