Butterfly valve plate sealing structure

• Main Author: KONG XIANMEI
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2020
• 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 provides a butterfly valve plate sealing structure. The butterfly valve comprises a valve body, wherein the valve block is installed in the valve body through the valve rod, the sealing ring is fixedly arranged on the inner ring of the valve body and used for sealing the valve block, an annular cavity is formed in the sealing ring, the central axis of the valve rod is located inthe plane where the central line of a cavity body of the annular cavity is located, an air nozzle communicated with the annular cavity is arranged on the outer ring of the sealing ring, and the air nozzle penetrates out of the valve body. According to the valve plate sealing structure of the butterfly valve, the annular cavity is formed in the sealing ring, the air nozzle is arranged on the sealing ring, and the radial thickness of the sealing ring is adjusted by controlling the amount of air in the annular cavity, so that the sealing effect of the sealing ring is guaranteed, the influence oftemperature on the use of