Valve with good sealing performance

The valve with the good sealing performance comprises a rotating wheel disc, a valve body, a valve cavity and an adding pipeline, the rotating wheel disc is fixedly connected to the top end of the valve body, a transmission adjusting rod is fixedly connected to the bottom end of the rotating wheel disc, and the valve cavity is formed in the top end of the interior of the valve body; a cylinder is movably connected to the bottom end of the transmission adjusting rod, a mounting plate is fixedly connected to the bottom end of the cylinder, moving blocks A are fixedly connected to the two sides of the mounting plate, sliding grooves A are fixedly connected to one sides of the moving blocks A, and a protection plate is movably connected to the bottom end of the mounting plate. The movable block B is fixedly connected to the top end of the protection plate, a sliding structure is formed between the movable block B and the sliding groove B, when the protection plate is opened or closed, water flow impacts the prote