Arc-shaped chain type gate system suitable for tide gate

The invention discloses an arc-shaped chain type gate system suitable for a tide gate. The arc-shaped chain type gate system comprises a gate arranged between a left gate pier and a right gate pier and an opening and closing device used for opening and closing the gate. The gate is an arc-shaped chain type gate formed by sequentially arranging a plurality of gate units from a left gate pier to a right gate pier according to an arc line, the arc of the arc-shaped chain type gate protrudes towards one side of a river channel, and every two adjacent gate units are hinged through a lug ring and a pin shaft. The gate units located at the left end and the right end are hinged to hinge supports arranged on the left gate pier and the right gate pier through lug rings and pin shafts respectively. A gate chamber is arranged along the left bank and/or the right bank of the river channel corresponding to the left gate pier and/or the right gate pier; and opening and closing devices for opening/closing the arc-shaped chai