Double-valve-clack type stop valve

The utility model belongs to the field of stop valves, and particularly relates to a double-valve clack type stop valve which comprises a valve body, a valve deck, a valve rod, a driving device and avalve clack assembly, the valve clack assembly comprises a main valve clack, an auxiliary valve clack, an annular limiting piece and an annular gland, and the outer diameter of the end, close to a connecting rod, of the valve rod is larger than or equal to the diameter of the end, during closing, hydraulic pressure acts on the lower end surface of the valve rod and the upper end surface of the auxiliary valve clack, and due to the fact that the area of the lower end surface of the valve rod is larger than or equal to the upper end surface of the auxiliary valve clack, the hydraulic pressure cannot hinder the opening action of the auxiliary valve clack and even can provide pushing force for the opening action of the auxiliary valve clack. 本实用新型属于截止阀领域，具体涉及一种双阀瓣式截止阀，包括阀体、阀盖、阀杆、驱动装置、阀瓣组件，阀瓣组件包括主阀瓣、副阀瓣、环形限位件、环形压盖，所述阀杆