Self-adjusting storm valve

The invention discloses a self-adjusting storm valve, which comprises a storm shield, a storm float valve, a breather pipe, an air intake pipe, a settling tank, seal rings A and B, a guide groove, a slide rail, a tray and a fixed support, wherein the storm shield has a frustum-shaped structure of which the bottom is provided with a counter bore; the storm float valve has a frustum-shaped cavity shell structure of which the upper end is provided with a counter bore; a through hole is formed in the axle center of the counter bore; the guide groove is formed on a through hole wall; a seal grooveis formed at the periphery of the counter bore at the upper end of the storm float valve; a seal boss is arranged on the inner side of the top of the storm shield corresponding to the seal groove; a through hole is formed on the side of the top of the breather pipe; a seal groove is formed at the junction of the counter bore of the storm float valve and the through hole; and a seal boss is arranged at the bottom of the fi