Flat gate valve for forge welding

• Main Authors: QUAN YUHUA, GONG WANGJUN, ZHANG JUNPING, GU BANGYU, YE DELI, MIAO ZHIMING, RAN PING, XU DANHONG
• Format: Patent
• Language: Chinese; English
• Published: 26.01.2011
• 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

The utility model relates to a flat gate valve for forge welding, which belongs to the technical field of valves and comprises a shell body, a valve seat arranged in the shell body, a valve plate that forms a coupling sealing part with the sealing face of the valve seat, a valve stem connected with the valve plate, a bracket connected with the shell body and a valve stem transmission device arranged on the bracket. The flat gate valve is characterized in that: a) the maintenance-free coupling sealing part between the valve seat and the valve plate consists of a hard sealing face for the valve seat, a soft seal, a plunger ring and a lockpin which are also arranged at the sealing end of the valve seat; b) a dust-proof structure, which is formed by a ring groove arranged at the valve body and a boss arranged at the rear part of the valve seat in a manner of corresponding to the ring groove and stretching into the ring groove of the valve body, is positioned at the rear part of the valve seat. The flat gate valve