TWI758791B

According to the present invention, a gate valve comprises a valve box, a valve main body, a rotational shaft, a rotational shaft driving unit, a driving valve unit, a valve box tensioning unit, a hydraulic pressure driving unit, a first connection unit, and a second connection unit. The first conne...

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Bibliographische Detailangaben
Hauptverfasser:	SAKODA, SEIYA, SUZUKI, MIKIYA, WADA, SHINICHI, ISHIDA, TOMOYA, TERUI, TAKAAKI, ENDO, JIROU, TSURU, SHUNSUKE, INOUE, HIDEAKI, WADE, TAKUYA
Format:	Patent
Sprache:	chi
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:	According to the present invention, a gate valve comprises a valve box, a valve main body, a rotational shaft, a rotational shaft driving unit, a driving valve unit, a valve box tensioning unit, a hydraulic pressure driving unit, a first connection unit, and a second connection unit. The first connection unit comprises: a plurality of connection members installed along a circumference of a first opening; and an inner seal area and an outer seal area installed along the circumference of the first opening to seal a surface of a first chamber and a surface of the valve box at both side positions of the connection member in a radial direction of the first opening.