Tokyo Metropolitan Government

Nippon Koei Co., Ltd.

Tokyo Metropolitan Sewerage Service Corporation

Tokyo Metropolitan Sewerage Servce Corporation

Hirofumi Ishiwada

Shigeki Nishimura

Hiroshi Komatsu

Shouichi Banba

Aya Uchino

Tsuneo Ochiai

Ikuo Uemura

Shigeru Tukada

In a conventional storm overflow chamber of a combined sewer system, inflowing floating debris do not flow into an intercepting pipe in a rainy weather, and flow out to a public water body, causing a water pollution in the public water body. According to a vortex flow type water surface control device for a draining device of the present invention, a control plate () higher than at least a separating weir () is provided between an opening of an inflow pipe () and an opening of an intercepting pipe () in a storm overflow chamber of a combined sewer system. Moreover, a guide wall () higher than at least the separating weir () is provided along the separating weir between the opening of the inflow pipe () and the separating weir ().

Vortex flow type water surface control device for draining device

A vortex flow type water surface control device for a draining device is provided. The vortex flow type water surface control device may include an inflow pipe, an outflow pipe, an intercepting pipe, and a separating weir that is disposed to block the intercepting pipe and the inflow pipe from the outflow pipe. The vortex flow type water surface control device may also include a control plate that is disposed between an opening of the inflow pipe and an opening of the intercepting pipe. A height of the control plate may be higher than at least a height of the separating weir. The control plate may be apart from the separating weir, and may approximately extend to a center axis of the intercepting pipe.

Growing community of inventors

Tokyo, Japan

Hirofumi Ishiwada