Normally open type one-way valve

The utility model relates to the field of fluid valves, in particular to a normally open type one-way valve which comprises a valve head and a valve body, and the valve head is detachably connected with the valve body. A through hole for air inlet and an air tap for air outlet are formed in the valve head, a communicating cavity is formed in the end, close to the valve body, of the valve head, the through hole and the air tap are both communicated with the communicating cavity, the valve head is elastically connected with a blocking valve plate covering the communicating cavity, and a gap is formed between the blocking valve plate and the air tap; a driving assembly is arranged at the end, close to the valve head, of the valve body and used for driving the blocking valve plate to move in the direction close to or away from the air nozzle. The one-way valve has the effect of prolonging the service life of the one-way valve. 本申请涉及流体阀的领域，尤其是涉及常开式单向阀，其包括阀头和阀体，所述阀头与所述阀体可拆卸连接；所述阀头上开设有进气用通孔和出气用气嘴，所述阀头靠近所述阀体的一端开设有连通腔