Two-way bellows hard-seated butterfly valve

The utility model relates to a butterfly valve, in particular to a two-way bellows hard-seated butterfly valve, comprising a valve body, a valve seat, a butterfly plate, a valve rod linked with the butterfly plate and an operation mechanism driving the valve rod to rotate, wherein the circumferentia...

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Bibliographische Detailangaben
Hauptverfasser:	WANG CHENGGAO, WANG JINGWANG, SU JINGPAN, CHEN LEKE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	The utility model relates to a butterfly valve, in particular to a two-way bellows hard-seated butterfly valve, comprising a valve body, a valve seat, a butterfly plate, a valve rod linked with the butterfly plate and an operation mechanism driving the valve rod to rotate, wherein the circumferential sealed work face of the butterfly plate is a slant conical face; and the corresponding work face of the valve seat is a slant face. The two-way bellows hard-seated butterfly valve is characterized in that a clearance is formed between the periphery of the valve seat and the inner wall of a channel of the valve body to form a suspension structure; an annular boss is arranged on the inner wall of the channel of the valve body, and the end face of the valve seat is connected with the end surface of the annular boss through bellows; an outer layer of the bellows is communicated with the clearance between the valve seat and the inner wall of the channel of the valve body; and the inner layer of the bellows is communic