Butterfly valve

• Main Authors: CHEN XINSHU, ZHOU GUILIN, DAI HONGBING
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; 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 belongs to the technical field of butterfly valves, and particularly discloses a butterfly valve. A sealing piece is arranged in a first containing cavity defined by an annular protrusion of a valve cover and an annular groove of a valve body; the minimum radial size of any cross section of the second containing cavity in the axis direction of the valve body is larger than or equal to the maximum radial size of any cross section of the first containing cavity in the axis direction of the valve body. Therefore, after the sealing piece is installed in the second containing cavity, the sealing piece cannot directly or indirectly act on the valve rod in the axis direction of the valve rod. Compared with an existing scheme, by adjusting the structure of the butterfly valve, the number of matched parts in the axis direction of the valve rod can be reduced, then the accumulated tolerance in the axis direction of the valve rod is reduced, the precision of the parts arranged in the axis direction can