(1) According to the material of production. There are mainly wooden gates, steel frame gates with wood panels, cast iron gates, reinforced concrete gates and steel gates. (2) According to the relative position of gate top and horizontal plane. There are mainly open-top gate and submerged gate. (3) According to the nature of work. There are mainly working gates, accident gates and overhaul gates. (4) According to the method of gate opening and gelidunm.75ix.cn caomoju.75ix.cn liujiaohupo.75ix.cn gaiban.75ix.cn hupomoju.75ix.cn liushuicaoo.75ix.cnclosing. The main purpose is to control the opening and closing of hydraulic automatic gates by changing the water pressure of the gates when the water level fluctuates and the opening and closing of the gates are operated mechanically. (5) According to different supporting forms of door blades. Mainly by fixed wheel support gate, hinge support gate, slideway support gate, sprocket gate, series roller gate, round roller gate and so on.