JPH0640707Y2 - Drain - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a drainage basin installed at a turning point such as a sewer.

[Conventional technology]

As shown in Fig. 5, the drainage basin installed during the introduction of miscellaneous drainage from ordinary households into the sewer main pipe is a waterway 1 connected to the sewage main pipe and a waterway 2 diagonally connecting to this waterway 1. Have. Each of these water channels 1 and 2 is formed in a concave groove shape, and a raised weir portion 3 as shown in FIG. 6 is provided between the both water channels 1 and 2.

In such a drainage basin A, the miscellaneous wastewater that has flowed into the water channel 2 as shown by the arrow X in FIGS. 5 and 6 flows into the water channel 1 and flows out from this water channel 1 to the sewer main pipe (not shown). And waterway 2
If the flow velocity of the water flowing in is not so high, the water flow smoothly flows into the water channel 1.

[Problems to be solved by the invention]

However, if the flow velocity is very fast, such as gray water discharged from the second floor of the house, or if a large amount of gray water is discharged at one time, it is indicated by an arrow Y in Figs. 5 and 6. As described above, the miscellaneous drainage flows over the weir part 3 and flows back to the upstream side of the water channel 1, and runs on the side wall 11 opposite to the water channel 2 of the drainage trough, and in the worst case, it blocks the upper opening of drainage trough A. You can flip up the lid (not shown). When such a situation occurs, the sewage in the miscellaneous drainage remains attached to the weir 3, the side wall 11 and other inner walls of the drainage gutter to prevent smooth running of water, to pollute the drainage gutter, to the ground. This will lead to the discharge of gray water. Therefore, by curving the water channel 2 as shown in FIG. 5 and increasing the radius of curvature thereof, the flow velocity of the gray water is slowed while the miscellaneous wastewater is passing through the water channel 2, and thus the weir portion 3 and the side wall 11 of the water flow. Although it has been attempted to prevent the rider from climbing up to, the straightness of the water flow is stronger than expected,
In addition, there is a limit to increasing the above radius of curvature due to the relationship with the diameter of the drainage basin, so it cannot be said to be a satisfactory solution. It cannot be used when it is formed in a right angle direction.

The present invention has been made in view of the above circumstances, and an object of the present invention is that, even though both water channels are formed in a right angle direction, almost no spillage of water is carried on the side wall or rebounded. It is to provide a drainage basin that can be smoothly discharged to the main sewer pipe.

[Means for solving problems]

In order to achieve the above-mentioned object, the drainage basin of the present invention has a side wall of an outflow side water channel, which is provided at a position deviated from the center of the drainage basin, which is curved and bulges outward from the peripheral wall of the drainage side water channel. It is characterized in that a water channel on the inflow side that communicates is provided at a right angle, and a step is provided so that the bottom surface of the water channel on the inflow side is located closer to the bottom surface of the water channel on the outflow side.

[Action]

In the drainage basin with the above configuration, the side wall of the drainage channel is located at a position deviated from the center of the drainage basin so that it bulges outward from the peripheral wall. You can increase the length of the waterways. Therefore, the inflowing miscellaneous wastewater has a certain flow velocity slower while flowing through the inflow side water channel. Since a step is provided so that the bottom surface of the inflow side water channel is higher than the bottom surface of the outflow side water channel, the miscellaneous wastewater that has flowed through the inflow side water channel once flows down to the outflow side water channel at this step portion, It smoothly inverts along the curved bulging side wall, and the energy of the water stream is effectively dispersed and absorbed, and falls into the outflow side water channel with the flow velocity further weakened. In this way, even if the flow velocity at the time of inflow is fast, it is decelerated in the inflow side water channel, and the water flow once flowing into the outflow side channel is smoothly reversed along the side wall of the outflow side channel and further decelerated, so it may bounce off violently. It disappears and is smoothly discharged from the outflow side canal to the sewer main.

〔Example〕

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

In the drainage basin A illustrated in FIG. 1, an inflow side water channel 2 for introducing miscellaneous drainage is connected at a right angle to a straight outflow side water channel 1 connected to a main sewer pipe. This outflow channel 1
Is provided at a position deviated from the center of the drainage wall 4 as shown in the figure, and as shown in FIG. 3, the side wall 11 of the outflow side water channel 1 is curved in an arc shape outward from the drainage wall 4. Bulging out. As described above, the outflow side water channel 1 is provided at a biased position because the length of the inflow side water channel 2 is set as long as possible to reduce the flow velocity of the inflowing miscellaneous wastewater in the inflow side water channel 2 and This is to facilitate cleaning of the
The reason why 11 is curved and bulged in an arc shape is that it smoothly reverses along the side wall 11 of the miscellaneous wastewater that has flowed down to the outflow side water channel 1, and disperses and absorbs the energy of the water flow to further reduce the flow velocity. This is because.

Further, this outflow side water channel 1 has a predetermined drop D ₁ between its starting end and its end as shown in FIG. This drop D ₁ is provided to surely prevent backflow of gray water, and it is desirable to set it within a range of 3 to 10 cm. This is because if the head D ₁ is less than this, there is anxiety in order to prevent sufficient backflow, but a head more than this is not necessary for actual use, and it is likely to cause inconvenience in connecting the main sewer pipe.

Further, as shown in FIG. 3, at the gathering point a of both the water channels 1 and 2, a step D ₂ is provided between the bottom surface of the outflow channel 1 and the bottom surface of the inflow channel 2. The step D ₂ causes the miscellaneous wastewater that has flowed in from the inflow side water channel 2 to once flow out into the outflow side water channel 1 so that the side wall 11 does not collide violently.
It is provided in order to smoothly flip along 11.

Further, it is preferable that the bottom surface of the inflow side water channel 2 is not provided with a slope as shown in FIG. This is because there is an advantage that the flow velocity of the inflowing gray water is further reduced when there is no gradient.

According to such a drainage basin A, the miscellaneous wastewater that has flowed into the inflow side water channel 2 as shown by the arrow X in FIG. 3 is decelerated to some extent while flowing through the long inflow side water channel 2, and the stepped portion as shown by the arrow Z _0. Through the outflow side waterway 1 and then outflow side waterway 1
Curved shape along the side wall 11 which bulges reversed smoothly as shown by the arrow Z _1, outflow side as indicated by arrow Z ₂ in a state in which the energy of the water flow is weakened further flow rate is effectively dispersed and absorbed Fall into waterway 1. In this way, even if the flow velocity at the time of inflow is fast, it is decelerated in the inflow side water channel 2 and the water flow once flowing into the outflow side water channel 1 is smoothly reversed along the side wall 11 of the outflow side water channel 1 and further decelerated. It smoothly flows out of the outflow side water channel 1 to the main sewer pipe. Therefore, the gray water rebounds violently and the solid matter is attached to the inner surface.
There is almost no backflow to the upstream side of. This backflow prevention is further ensured by the synergistic effect that the outflow side water channel 1 has the head D ₁ as described above. Further, since the miscellaneous wastewater that has once flown down from the inflow side water channel 2 exists on the bottom surface of the outflow side water channel 1, the miscellaneous waste water that has fallen after reversal does not directly hit the bottom surface of the inflow side water channel 2 and damage it.

FIG. 4 illustrates an embodiment in which the present invention is applied to a drainage basin A, which is commonly called a bend. That is, this drain masu A
Is the water channel 1 on the outflow side and the water channel 2 on the inflow side leading to this is L
The point provided in the shape of a letter and the starting end point of the outflow side water channel 1 are not used as corners, but a large radius section 12 is formed at the starting end point.
Is provided, and the construction is the same as that of the above-described embodiment except that miscellaneous wastewater is prevented from accumulating as much as possible. It goes without saying that such a drainage basin also exhibits the same effects as the above-mentioned embodiment.

[Effect of device]

As is clear from the above description, the drainage basin of the present invention,
Even though the waterway on the outflow side and the waterway on the inflow side that communicates with it are provided at right angles, the flow speed in the inflow side waterway is reduced to some extent, and the water flow once dropped into the outflow waterway through the step By smoothly reversing along the curved side wall of the outflow channel, the speed can be further reduced and the water can be smoothly discharged from the outflow channel. Therefore, the inflowing miscellaneous wastewater violently collides against the side wall of the outflow side channel and bounces off,
It is possible to prevent solid matters from adhering to the inner surface of the drainage basin, from flowing back to the upstream side of the outflow side water channel, and from flipping up the lid.

In addition, the drainage basin of the present invention has a stable shape in which the side wall of the waterway on the outflow side is curved and bulges outward from the peripheral wall of the drainage basin, and the lower part is expanded more than the upper part of the masu. Since the inflow side canal is connected to the side canal at right angles and balanced, it can be installed stably during construction,
The effect is that the piping work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the drainage basin of the present invention, and FIG.
Figure is a front view of the drainage basin, Figure 3 is a sectional view taken along the line III-III in Figure 1, Figure 4 is a schematic plan view showing another embodiment of the drainage basin of the present invention, and Figure 5 is a conventional one. FIG. 6 is a schematic plan view showing the drainage basin, and FIG. 6 is a sectional view taken along the line VII-VII in FIG. 1 ... Outflow channel, 2 ... Inflow channel, 11 ... Outflow channel side wall, 4 ... Drainage peripheral wall.

Claims (1)

[Scope of utility model registration request] [1] The side wall of the outflow side water channel provided at a position deviated from the center of the drainage basin is curved and bulges outward from the peripheral wall of the drainage side, and the inflow side waterway leading to this outflow side waterway is at a right angle direction. The drainage is characterized in that a step is provided so that the bottom surface of the inflow side water channel is higher than the bottom surface of the outflow side water channel.