JPH0118715Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to drainage basins installed at diversion points of sewers, etc.

[Conventional technology]

As shown in Figure 6, a drainage basin installed on the way where gray water discharged from a general household, etc. is introduced into a main sewage pipe is a waterway 1 that is connected to the main sewage pipe and a waterway 2 that diagonally leads to this waterway 1. has. Both of these waterways 1 and 2 are configured in the shape of a concave groove,
As clearly shown in FIG. 7, a raised weir portion 3 is provided between both water channels 1 and 2. In such drainage basin A, gray water that has flowed into waterway 2 as shown by arrow X in Figures 6 and 7 flows into waterway 1,
The water is led out from this waterway 1 to a main sewage pipe (not shown). If the flow rate of the water flowing into the water channel 2 is not too fast, the water flow smoothly flows into the water channel 1.

[Problem that the invention attempts to solve]

However, when the flow rate is very fast, such as gray water discharged from the second floor of a house, or when a large amount of gray water is discharged at once, the
As shown by the arrow Y in the figure, gray water may overflow the weir 3 and flow backward into the upstream side of the waterway 1, or run onto the side wall 11 of the drainage basin on the opposite side of the waterway 2, or in severe cases, it will be drained.A or flip up the lid (not shown) that covers the upper opening. When such a situation occurs, the filth in the gray water flows into the weir part 3 and side wall 1.
1 and other drainage basins, it may remain attached to the inner wall of the drainage basin, obstructing the smooth flow of water, staining the drainage basin, or causing miscellaneous wastewater to flow onto the ground. Therefore, by curving the waterway 2 as shown in the figure and increasing the curvature of the curve, the flow velocity of gray water is slowed down while it passes through the waterway 2. Attempts have been made to prevent the water from running over the drain, but the straightness of the water flow is stronger than expected, and there are limits to increasing the curvature due to the diameter of the drainage basin.
This is not a satisfactory solution.

The present invention considers this problem to be solved, and its purpose is to prevent miscellaneous wastewater from running aground on the weir or side wall, and preventing it from flowing into the waterway by providing a water return at a predetermined location of the drainage basin to reverse the flow of water. The aim is to prevent backflow of gray water.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides the upper part of the side walls 11, 21 where the water flow collides with the side walls 11, 21.
The gist is that a continuous folded water return 5 is provided.

[Effect]

According to the above means, even when the water flow collides with the side wall of the waterway, the water flow reverses along the water return without riding up the side wall, and as the water flow reverses, the energy of the water flow is effectively dispersed and absorbed. be done. Therefore, even if the initial flow velocity is high, the flow velocity slows down after the reversal, and the water is smoothly led out to the main sewer pipe through the waterway.

Embodiments of the present invention will be described below with reference to the drawings.

〔Example〕

In the drainage basin A illustrated in FIG. 1, a straight waterway 1 connected to a main sewage pipe has a waterway 2 for introducing gray water at a right angle. As clearly shown in the same figure, the water channel 1 is provided at a location deviated from the center of the drainage basin peripheral wall 4, and as shown in FIG. D has ₁ . This head D ₁ was provided to reliably prevent the backflow of gray water.
It is desirable to provide a distance of ~10cm. head difference
If D ₁ is less than this, there is a concern that it will not be possible to sufficiently prevent backflow, while a head greater than this is not necessary in actual use and is likely to cause inconvenience when connecting to the main sewage pipe. Further, as clearly shown in FIG. 3, at the meeting point A of the waterway 1 and the waterway 2, a head difference _D2 is provided between the bottom surface of the waterway 1 and the bottom surface of the waterway 2.
Further, a side wall 11 of the water channel 1 facing the terminal end of the water channel 2 is integrally provided with a folded water return 5 continuous to the side wall 11.

According to such a drainage basin A, gray water that flows into the waterway ₂ as shown by _the arrow It is guided and reaches the water return 5, where it turns around along the water return 5 and falls into the water channel 1.
As the energy of the water flow is dispersed and absorbed as a result of this reversal, even if the flow velocity in the waterway 2 is very fast, the flow velocity of gray water falling into the waterway 1 becomes slow. Therefore, gray water will not flow back to the upstream side of the waterway 1, and this backflow prevention effect is further ensured by the synergistic effect of the waterway 1 having the head D ₁ as described above. . In addition, because waterway 1 has the above-mentioned head D ₂ , gray water from waterway 2 temporarily stagnates, and the inverted gray water falls on top of this stagnant water, so it will not damage drainage channel A. .

In addition, in the illustrated example, the side wall 4 that drains the water channel 1
The reason why they were installed in a lopsided location is to make the length of the waterway 2 as long as possible to slow down the flow velocity of the gray water flowing through the waterway 2, and to make it easier to clean the inside of the drainage basin. .

FIG. 4 illustrates the case where the present invention is applied to a drainage basin A, commonly called a so-called curved basin. In the figure, gray water flowing from a waterway 2 collides with a side wall 11 of a waterway 1, and then the gray water is reversed by a water return 5 provided continuously on the sidewall 11. In addition, in this drainage basin A, the starting end of the water channel 1 is not a corner part, but a large rounded part 12 is provided at this starting end to prevent gray water from accumulating as much as possible.

Figure 5a shows a drainage basin A commonly known as a so-called YT basin, and Figure 5b shows a drainage basin A commonly known as a so-called YT basin. For YT Masu,
Since the water flow collides with the outer side wall 21 of the water channel 2 that diagonally communicates with the water channel 1, the water return 5 is continuously provided on the upper part of this side wall 21. In addition, in the case of both YT basins, since the water flow collides with the outer side walls 11 and 21 of each of the water channels 1 and 2, water returns 5 and 5 are provided on both of these side walls 11 and 21. in this way,
In the present invention, the water return may be provided at the upper part of the side wall where the water flow collides with the water flow so as to be continuous with the side wall.

[Effect of idea]

As is clear from the above, the drainage basin according to the present invention disperses and absorbs the energy of the water flow by reversing the water flow, thereby slowing down the flow velocity. Even if the flow velocity is fast, the flow velocity becomes slow after reversal,
This allows for smooth drainage to the main sewage pipe through the waterway. Therefore, gray water introduced into the drainage basin will not flow backwards, ride on the side walls of the drainage basin, flip up the lid, or prevent smooth water flow due to adhesion of filth.

[Brief explanation of the drawing]

Figure 1 is a plan view showing a drainage basin according to an embodiment of the present invention, Figure 2 is a front view of the drainage basin, Figure 3 is a sectional view taken along the - line in Figure 1, Figures 4 and 5.
Figures a and 5b are schematic plan views showing a modified example of the drainage basin to which the present invention is applied, Figure 6 is a schematic plan view showing a conventional drainage basin, and Figure 7 is a schematic plan view showing a modification of the drainage basin to which the present invention is applied.
It is a sectional view along a line. 1, 2... Channel, 11, 21... Side wall with which the water flow collides, 5... Water return.

Claims (1)

[Scope of utility model registration request] A drainage basin characterized by having a folded water return that is continuous with the side wall at the top of the side wall where the water flow collides with the water flow.