Hydraulic flap valve

The utility model relates to the technical field of valves. The hydraulic flap valve comprises a first pipeline, the bottom of the first pipeline is sleeved with a connecting ring, the bottom of the first pipeline communicates with a second pipeline, a through groove is formed in the top of the right side of the first pipeline, a valve plate is supported by an inner cavity bearing of the through groove, and the right side of the valve plate extends to an inner cavity of the first pipeline to be attached to the right side of the inner wall of the first pipeline. The first pipeline, the connecting ring, the second pipeline, the through groove, the valve plate, the hydraulic cylinder, the sliding rod, the sliding sleeve, the supporting rod, the buffering mechanism and the limiting mechanism are arranged; the purpose of reducing part damage is achieved; the flap valve solves the problems that when an existing flap valve is used for controlling fluid such as mud, due to the fact that the mass of the fluid is large