JP2726671B2 - How to drain detergent water - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for draining detergent wastewater in middle- and high-rise houses.

(Prior Art) As drainage pipe devices used for buildings such as middle- and high-rise houses, for example, JP-A-52-36842 and JP-A-55-168.
The one described in JP-A-579 is known.

This conventional one, when the washing drainage is drained down the drain,
The problem is that the washing drainage foams in the horizontal main pipe, and the inside of the horizontal main pipe is blocked by the foam. As a result, the air pressure inside the drainage pipe rises and the drainage of the drain trap is destroyed. .

That is, FIG. 7 shows a horizontal drain main pipe device described in the above-mentioned Japanese Patent Application Laid-Open No. 52-36842, but this conventional one has a different diameter elbow 11 and a different shape drainage at the lower end of a drainage vertical pipe 10. Tube 12
By connecting the horizontal main pipe 13 through the main pipe 13 and making the deformed drain pipe 12 into a special shape, it is intended to prevent the air layer from being blocked by foaming of the detergent drainage in the horizontal main pipe 13.

Further, those described in Japanese Utility Model Publication No. 55-168579,
The inside of the irregular drainage pipe is vertically divided by a partition plate,
Even if the lower channel is blocked by foam, air flows through the upper air channel, preventing the rise in pressure inside the pipe and preventing the danger of traps being blown up, even if the lower channel is blocked by foam. In addition, it facilitates the flow of drainage.

(Problems to be Solved by the Invention) The conventional drainage method using the drainage horizontal main pipe device has a problem due to foaming of drainage containing detergent such as washing drainage.

Accordingly, an object of the present invention is to provide a method of draining detergent drainage in which a baffle of detergent drainage in a horizontal main pipe is prevented from blocking an air passage and an increase in pressure in the pipe is prevented.

(Means for Solving the Problems) In order to achieve the above object, the present invention employs the following means. That is, the feature of the present invention is that drainage containing detergent such as laundry drainage generated in a building such as a middle-rise or high-rise house flows into a drainage stack through a horizontal branch pipe, and the drainage stack is formed. In the method of draining detergent drainage discharged to the outside through a horizontal main pipe connected to a lower end, when the total length of the horizontal main pipe exceeds 10 m, a predetermined cross-sectional area is defined on an upstream side from the drainage vertical pipe to 8 m. The point is to flow through a pipe having a cross-sectional area larger than the cross-sectional area on the upstream side on the downstream side exceeding 8 m.

(Operation) According to the present invention, when the length L of the horizontal main pipe exceeds 10 m, the pipe size of the horizontal main pipe exceeding 8 m is made larger than that of the section up to 8 m. This prevents the damming action due to the bubbling of the water, which enables smooth drainage and suppresses an increase in pipe pressure.

 The reason will be described below.

The inventor of the present application reported that two washing machines, three washing machines, and four washing machines were used in which the inner diameter of the drainage pipe was 100 mm, the inner diameter of the horizontal main pipe was 125 m, and the length of the horizontal main pipe was variously changed. Water was simultaneously drained from the machine, and the concentration of the detergent in the drain was changed variously, and the change in the pressure increase in the pipe was measured. The measurement results are shown in FIG. In this case, the rise in pressure in the pipe is 40-50 mm
When the pressure becomes Aq, an accident such as the drain trap blows off will occur, so the allowable pressure rise was set to 50 mmAq.

According to the above measurement results, when the drainage flow rate is small as in the case of two drains, even if the length of the horizontal main pipe is long, the pressure in the pipe is 50
There is no problem because it does not rise to mmAq.
It was found that the pipe pressure exceeded the allowable value when it exceeded 10 m.

Also, the drainage riser uses an inner diameter of 100 mm as described above, and the inner diameter of the horizontal main pipe is 150 mm, which is one size larger than 125 mm.
The same experiment as in FIG. 3 was performed. The measurement results of the experiment are shown in FIG. As is clear from the figure, when the inner diameter of the horizontal main pipe is set to 150 mm, no damming action due to foaming is observed.

Therefore, if the inner diameter of the horizontal main pipe is set to 150 mm, the problem of pressure increase in the pipe due to bubbling can be solved, but in all cases, it is extremely uneconomical to use a horizontal main pipe having an inner diameter of 150 mm.

Therefore, the inventor of the present application predicted that if the diameter of the horizontal main pipe was changed in accordance with the length of the horizontal main pipe, economical piping could be performed and the problem due to foaming could be solved. .

Therefore, of the 16 m horizontal main pipe, the upstream 10 m horizontal main pipe has an inner diameter of 125 mm, and the downstream 6 m horizontal main pipe has an inner diameter of 150 mm.
In the case of bamboo shoot piping and drainage of four units, the rise in pipe pressure was measured. The results are shown in FIG. FIG. 5 also shows, for comparison, the measured values when the total length of 10 m and 16 m is a horizontal main pipe having an inner diameter of 125 mm. According to the figure, it can be seen that if the bamboo shoot piping is used, the pressure increase in the pipe can be kept within an allowable value.

Furthermore, when the horizontal main pipe had a total length of 20 m, the same experiment was conducted with a bamboo shoot pipe having a length of 10 m on the upstream side of 125 mm and a length of 10 m on the downstream side of 150 m. The results are shown in FIG. According to the figure, in the case of four drains and three drains, the pressure rise exceeds the allowable value of 50 Aq.

Therefore, the inventor further requested that the total length be 20 m and the upstream 8 m be 125 m
The same experiment was performed using a mushroom pipe with a length of 150 mm on the downstream side and 12 m on the downstream side. The result is shown in FIG.

According to the figure, by taking a bamboo shoot pipe with a horizontal main pipe having an inner diameter of 125 mm up to 8 m on the upstream side of the horizontal main pipe and a downstream main pipe of one size larger than 150 mm, the pressure rise in the pipe can be reduced to an allowable value of 50 mmAq or less. It turns out that you can.

Therefore, by adopting the configuration of the present invention, economically,
It is possible to prevent the pressure in the pipe from rising.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a drainage pipe, which is provided vertically from a high floor to a lower floor of a high-rise house. In the middle part of the drainage riser 1, a collecting pipe is interposed for each floor, and a horizontal branch pipe is connected to the collecting pipe (not shown).
The horizontal branch pipe is piped to a kitchen or a toilet of each household, and sewage, washing drainage, and the like flow into the drainage riser 1 via the horizontal branch pipe.

A lower diameter elbow 2 is connected to a lower end of the drainage riser 1, and a horizontal main pipe 3 is connected to the elbow 2. The horizontal main pipe 3 is buried underground, and its tip is open to a drain.

The length L of the horizontal main pipe 3 (from the center of the drainage riser 1 to the horizontal main pipe 3
If the distance to the tip exceeds 10m, the horizontal main pipe 3
Is a small-diameter pipe 4 from the drainage riser 1 to 8 m, and a portion exceeding 8 m is a large-diameter pipe 5 whose size is one size larger than the small-diameter pipe 4. Are connected via a reducer 6.

In the above embodiment, the inner diameter of the drainage riser 1 is 100 mm, the inner diameter of the small diameter pipe 4 is 125 mm, and the inner diameter of the large diameter pipe 5 is 150 mm.

As described above, when the length L of the horizontal main pipe 3 exceeds 10 m,
By taking a bamboo shoot pipe with a small-diameter pipe 4 up to 8 m and a large-diameter pipe 5 above that, the damping action of the air layer in the horizontal main pipe 3 due to foaming by washing drainage is prevented, and smooth drainage is secured. Thus, the pressure in the pipe is prevented from rising.

The graph shown in FIG. 2 shows an example of the present invention in which, when the length L of the horizontal main pipe 3 is 20 m, a small-diameter pipe 4 having an inner diameter of 125 mm of 8 m and a large-diameter pipe 5 having an inner diameter of 150 mm of 12 m are bamboo shoot piping, This is a comparison of the pressure fluctuation in a pipe when a bamboo shoot piping is performed between a small-diameter pipe having a 10 m inner diameter of 125 mm and a large-diameter pipe having a 10 m inner diameter of 150 mm.

As is clear from FIG. 2, according to the embodiment of the present invention, it is understood that the pressure increase in the pipe is less than the allowable value.

Note that the present invention is not limited to the above embodiment.

(Effect of the Invention) According to the present invention, the damping action of the air tank in the horizontal main pipe due to the foaming of the detergent drainage is prevented, and the rise in pipe pressure is suppressed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a horizontal main pipe device showing an embodiment of the present invention, FIG. 2 is a graph showing a difference in pipe pressure fluctuation between the embodiment of the present invention and a comparative example, and FIG. FIG. 4 is a graph showing the length of the horizontal main pipe and the pressure fluctuation in the pipe when a straight horizontal main pipe is used. FIG. 4 shows the relationship between the length of the horizontal main pipe and the pressure fluctuation in the pipe when a straight horizontal main pipe having an inner diameter of 150 mm is used. Fig. 5 is a graph showing pressure fluctuations in a bamboo shoot piping in which a 6m long large diameter pipe with a 150mm inner diameter is connected to a 10m long small diameter pipe with a 125mm inner diameter pipe, and Fig. 6 is the length. FIG. 7 is a graph showing pressure fluctuation in a pipe in the case of a bamboo shoot pipe in which a large pipe of 10 m in length and 150 mm in inner diameter is connected to a small pipe of 10 m in diameter of 125 mm, and FIG. 7 shows a conventional horizontal pipe apparatus having a modified pipe structure. FIG. 1 ... standing drainage pipe, 3 ... horizontal main pipe, 4 ... small diameter pipe, 5 ...
Large diameter pipe.

Claims (1)

(57) [Claims] 1. Drainage containing detergent such as washing drainage generated in a building such as a middle-rise or high-rise house flows into a drainage stand through a horizontal branch pipe, and a horizontal part connected to a lower end of the drainage stand. In the method of draining detergent drainage discharged to the outside through the main pipe, when the total length (L) of the horizontal main pipe exceeds 10 m, the drainage is transferred to a pipe having a predetermined cross-sectional area up to 8 m from the drainage vertical pipe. A method for draining detergent water, comprising: flowing a pipe having a cross-sectional area larger than the cross-sectional area of the upstream side on the downstream side exceeding 8 m.