Low-temperature fixed ball valve

A ball core is arranged in a main valve body, a first valve body and a second valve body are arranged on the two sides of the main valve body, the low-temperature fixed ball valve is provided with a first valve seat assembly and a second valve seat assembly, the valve seat assembly is provided with...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG HAILIN, YANG ZHI, LIN CHANGHONG, BAI KAIYU, ZHANG CHAODONG, JIANG TAO, FENG KE, ZENG PINQI, LI JUNLIN, WANG QIQUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS CYLINDERS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MEASURING MECHANICAL ENGINEERING PHYSICS PISTONS SEALINGS TAPS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A ball core is arranged in a main valve body, a first valve body and a second valve body are arranged on the two sides of the main valve body, the low-temperature fixed ball valve is provided with a first valve seat assembly and a second valve seat assembly, the valve seat assembly is provided with a first valve seat support, a first lip-shaped sealing ring and a first valve seat, the first valve seat support is provided with a pressure-bearing check ring, and the second valve seat support is provided with a second lip-shaped sealing ring. A sealing switching hole is formed in the ball core, during working, the sealing switching hole faces the upstream, the first valve seat assembly does not participate in sealing, a pressure medium enters the second valve seat assembly through the sealing switching hole, the second valve seat assembly plays a sealing role, when the second valve seat assembly loses efficacy, the sealing switching hole is switched to the downstream side, the first valve assembly plays a sealin