Check valve

The invention discloses a check valve, which belongs to the field of oilfield development and comprises a valve body, a valve clack, a valve rod, an ejector rod and an ejector rod guide structure. The valve body comprises a liquid inlet chamber, a valve seat and a liquid outlet chamber, the valve se...

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Bibliographische Detailangaben
Hauptverfasser:	TANG TIANLEI, YANG PEILUN, GUO LILI, MA ZHIQIANG, YANG XIAOYONG, WANG PEI, CHEN XIAOHAI, SUN XIAOGUANG
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 invention discloses a check valve, which belongs to the field of oilfield development and comprises a valve body, a valve clack, a valve rod, an ejector rod and an ejector rod guide structure. The valve body comprises a liquid inlet chamber, a valve seat and a liquid outlet chamber, the valve seat is provided with a through hole, the liquid inlet chamber and the liquid outlet chamber are communicated through the through hole in the valve seat, and the first end of the valve rod is connected with one face of the valve clack; the ejector rod guide structure is installed in the liquid outlet cavity and comprises a guide hole, the second end of the valve rod is located in the guide hole, can move in the guide hole in the axial direction of the guide hole and drives the valve clack to abut against the valve seat, and the first end of the ejector rod is located in the guide hole and is opposite to the second end of the valve rod. The ejector rod is used for pushing the valve rod in the axial direction of the gu