Hitachi Zosen Corporation

Yuitirou Kimura

Toshiaki Morii

Kyouiti Nakayasu

Hideyuki Niizato

To prevent a door body from shaking significantly when it rises. A floating body flap gate is provided which is disposed on a roadway surface in an opening; and causes a door body to rise to block the opening when water is trying to flow in from the opening by using a water pressure of the water which is trying to flow in and a buoyancy of the door body. The door body is formed with three door body blocks, which are separated in the vertical direction. These door body blocks which are separated in the vertical direction, are connected by rotation mechanisms for rotation at a specified angle within a vertical plane in a direction in which the water is trying to flow in from the opening. The door body is not subject to significant shaking, regardless of the water level at which the water tries to flow in from the opening.

Floating body connection-type flap gate

The invention is for a mooring device () for a flap-gate breakwater () having a water blocking door body () that pivots about a horizontal axis. The mooring device () comprises a mooring hook () that controllably engages and disengages a gate mooring member () of the door body () during mooring and raising operations. The mooring hook () is operated by a control device (), making it possible to adjust the mooring hook position in a short period of time.

Mooring device for flap-gate breakwater

To make it possible to hold a door body in an immobilized state without oscillating when the raising operation has been completed. A raised state holding mechanism of a flap gate for a breakwater provided with a two-folding support rod which immobilizes and supports a door body the front end side of which is supported to freely rise or lower with a rotating shaft as a supporting point, and a stay which supports this and to which is attached a guide roller the movement of which is guided by a guide rail. Between a two-rod double-acting cylinder device and an oil tank there is a raising side oil supply pathway which supplies oil to a raising side oil chamber, a raising side oil discharge pathway which discharges oil from the raising side oil chamber, and a lowering side oil pathway which supplies/discharges oil to a lowering side oil chamber. A check valve is provided to the raising side oil supply pathway, and a shut-off valve is provided to the raising side oil discharge pathway to prevent lowering of the door body during the operation of raising the door body and after raising of the door body is completed. It becomes possible to hold a door body in an immobilized state without oscillating when the raising operation has been completed.

Growing community of inventors

Osaka, Japan

Yuitirou Kimura