Ball valve

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 shap...

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Bibliographic Details
Main Author MANLIN CHEN
Format Patent
LanguageEnglish
Published 25.09.2002
Edition7
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
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Summary: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.
Bibliography:Application Number: CN2001266681U