Variable eccentric hard sealing butterfly valve

• Main Authors: WANG YINGBO, WANG ZE, JIN FENGLU, YANG WEIDONG, GONG CHANGLONG, WANG DIZHENG
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2022
• 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 invention discloses a variable eccentric hard sealing butterfly valve which comprises a butterfly plate, a sealing ring, a valve body, a valve rod and a valve seat. The variable-eccentricity hard sealing butterfly valve is provided with a first eccentricity, a second eccentricity and a third eccentricity, wherein the first eccentricity is that the valve rod central axis of the valve rod deviates from the central plane of the sealing ring; the second eccentricity is that the valve rod central axis of the valve rod deviates from the central axis of the valve body runner hole; the projection of the central axis of the valve seat sealing conical surface and the projection of the central axis of the valve body runner hole on the section passing through the central axis of the valve rod and the central axis of the valve body runner hole coincide, and an eccentric angle is formed between the projections on the section perpendicular to the central axis of the valve rod and passing through the central axis of the