Ultralow-temperature large-diameter butterfly valve

• Main Authors: XU XINPING, BAI JIYUN, ZHU SHUANGWEI, LI HONGJIE, WEI WANCHUN
• Format: Patent
• Language: Chinese; English
• Published: 18.11.2022
• 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 the field of ultralow-temperature butterfly valves, and provides an ultralow-temperature large-diameter butterfly valve which comprises a valve body, a valve rod and a butterfly plate, a cold-shrinkage-resistant sealing ring assembly is arranged at the contact position of the butterfly plate and the valve body, thrust shaft sleeves arranged on the valve rod in a sleeving mode are arranged at the upper end and the lower end of the butterfly plate, and the inner sides of the thrust shaft sleeves abut against the butterfly plate. The outer side of the thrust shaft sleeve abuts against a valve sleeve fixedly installed on the inner wall of the valve body, the anti-cold-contraction sealing ring assembly comprises an outer locking plate, a limiting ring, a sealing ring and a valve body top dead ring assembly, the limiting ring is compressed and fixed to the outer ring of the butterfly plate through the limiting ring, the limiting ring is fixed to the butterfly plate through the outer loc