Patent ID: 11939759
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 9:
10. A sewage system comprising:
a first water branching device to which are connected a rainwater pipe that introduces rainwater, an intercepting pipe that drains rainwater into a sewage treatment plant into which wastewater is drained from a wastewater pipe and a first discharge pipe, the first water branching device separating rainwater coming from the rainwater pipe into rainwater to be drained into the intercepting pipe and rainwater to be drained into the first discharge pipe; and
a second water branching device to which are connected the first discharge pipe, a second discharge pipe that discharges rainwater into a public water body and an inflow pipe for a regulating reservoir, the inflow pipe being connected to the regulating reservoir that stores rainwater, the second water branching device separating rainwater coming from the first discharge pipe into rainwater to be drained into the second discharge pipe and rainwater to be drained into the inflow pipe for the regulating reservoir, wherein
the first water branching device includes a channel in which rainwater coming from the rainwater pipe is drained into the intercepting pipe, a plurality of overflow weirs erected on at least one of both sides of the channel, a plurality of partitions each provided between each of the plurality of overflow weirs and between the overflow weir arranged downstream and the intercepting pipe, the plurality of partitions each including an orifice formed therein, and a plurality of regulating tanks demarcated by the plurality of overflow weirs and the plurality of partitions, wherein the first discharge pipe introducing rainwater overflowing the plurality of overflow weirs is connected below the plurality of regulating tanks, and
the second water branching device includes a channel in which rainwater coming from the first discharge pipe is drained into the second discharge pipe, a plurality of overflow weirs erected on at least one of both sides of the channel, a plurality of partitions each provided between each of the plurality of overflow weirs and between the overflow weir arranged downstream and the second discharge pipe, the plurality of partitions each including an orifice formed therein, and a plurality of regulating tanks demarcated by the plurality of overflow weirs and the plurality of partitions, wherein the inflow pipe for the regulating reservoir introducing rainwater overflowing the plurality of overflow weirs is connected below the plurality of regulating tanks.