DOUBLE-DISC GATE VALVE AND USE

• Main Authors: GUO, Jin, DING, Yingren, ZHENG, Pingyang, YANG, Huan, YANG, Fan, HAN, Jingbo, LIU, Jinxian, SU, Xiang
• Format: Patent
• Language: English; French; German
• Published: 12.05.2021
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A double-plate gate valve includes a valve body, a valve cover, a valve stem, a guide plate, a goggle plate assembly, a diversion hole assembly, a disc spring assembly and a valve plate and wedge assembly. The guide plate is nested in a valve chamber formed by the valve body and the valve cover. The goggle plate assembly provides mounting support for the diversion hole assembly and the valve plate and wedge assembly in the valve chamber, the goggle plate assembly is movable along with the diversion hole assembly and the valve plate and wedge assembly in the valve chamber, and floating seals are formed at a contact surface between the diversion hole assembly and the guide plate, and at a contact surface between the valve plate and wedge assembly and the guide plate. The diversion hole assembly is adjustable, that is, a face-to-face distance and a sealing force between a sealing surface of the diversion hole assembly and a sealing surface of the valve body are adjustable, to allow a straight through pipe to be formed and an elastic seal between the diversion hole assembly and a valve seat to be formed in a case that the valve is fully opened. The disc spring assembly is used for overcoming friction forces of the valve plate and wedge assembly and the diversion hole assembly during a closing process of the valve. The valve stem is configured to transmit actuating forces during opening and closing processes of the valve.