Double sealing apparatus for valve closure member

• Main Authors: JIAQIAN LIN, ZHIYUAN JIN, ZHIPENG LI
• Format: Patent
• Language: English
• Published: 13.04.2005
• Edition: 7
• 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 present invention is double sealing mechanism for stepped closing valve. The double sealing mechanism includes valve rod, slowly closing valve plate, slowly closing soft sealing, slowly closing hard sealing, small press plate, fast closing valve plate, fast closing soft sealing, fast closing hard sealing, large press plate, fast closing soft sealing plane, fast closing hard sealing plane, valve seat, valve body, etc. The slowly closing soft sealing and the small press plate are screwed on slowly closing valve plate, and all the slowly closing valve plate, the slowly closing soft sealing and the small press plate are screwed on the valve rod. The slowly closing hard sealing is welded on the slowly closing valve plate. The fast closing soft sealing is installed on the fast closing valve plate, and the large press plate to press the fast closing soft sealing is screwed to the fast closing valve plate. The valve seat is screwed to the valve body. The present invention has reliable sealing and long service life.