SCOURING DEVICE OF ROTARY GATE

PROBLEM TO BE SOLVED: To remove sand accumulated below supporting discs in right and left positions of a door body. SOLUTION: A gate body 3 is formed by mounting the door body 5 between the peripheral portions of the right and left supporting discs 4. The rotary gate is formed in such a manner as to be rotatable on a horizontal shaft by arranging the gate body 3 across a waterway between right and left supporting column members 2. The rotary gate is provided with scouring piping 18 which makes an upstream-side water inflow opening 19 and a water outflow opening 20 communicate with each other. The inflow opening 19 is opened in a position lower by a predetermined dimension h than a levee crown when the door body 5 is put into a fully closed state in the waterway on the upstream side of the door body 5, and the outflow opening 20 is opened in a downstream direction in a position below each of the supporting discs 4. Water 27, which is taken in from the inflow opening 19, is guided to the outflow opening 20 through the scouring piping 18 on the basis of a difference between water levels on the upstream and downstream sides of the door body 5, so as to constantly flow out in the downstream direction in the position below the supporting disc 4. This makes sediment below the supporting disc 4 flow out to the downstream side. COPYRIGHT: (C)2008,JPO&INPIT