Ball valve

• Main Author: MANLIN CHEN
• Format: Patent
• Language: English
• Published: 25.09.2002
• 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 utility model relates to a valve, in particular to a ball valve. The lower end of the valve rod for the ball valve is provided with a protruding shoulder, and the lower end of the installation hole for the valve body is provided with a step corresponding with the protruding shoulder. A bowl shape sealing ring is arranged between the step and the protruding shoulder. The upper end of the installation hole for the valve body is a sinking hole. The periphery of the valve rod in the sinking hole is sleeved with an upper combination sealing ring and a lower combination sealing ring, and the upper combination sealing ring and the valve rod are in the interference fit. The upper and lower combination sealing rings are cooperated through the cone surface. An adjusting press cover is positioned above the upper combination sealing ring, and the adjusting press cover and the valve rod are cooperated through the valve rod. The utility model has good sealing effect, which is uneasy for leaking, and has low requirement for manufacturing precision.