Ventilation valve

The utility model belongs to the technical field of valves, and particularly relates to a vent valve for calibrating a gas sensor. A ventilation valve comprises a valve body and a valve element, and a valve body air inlet, a first valve body air outlet and a second valve body air outlet are formed i...

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Bibliographische Detailangaben
Hauptverfasser:	LIU JIAHONG, SHEN ZHENJIANG, WANG ZHAO, GAO ZIYUAN, ZHANG CIHANG, PAN JUNPENG, ZHOU JIAJIN
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 belongs to the technical field of valves, and particularly relates to a vent valve for calibrating a gas sensor. A ventilation valve comprises a valve body and a valve element, and a valve body air inlet, a first valve body air outlet and a second valve body air outlet are formed in the valve body. A spring is arranged between the bottom of the valve body and the bottom of the valve core; a first sealing boss, a second sealing boss and a third sealing boss are horizontally arranged on the outer circumference of the valve element, and sealing rings are embedded in the outer circumferences of the first sealing boss, the second sealing boss and the third sealing boss. An air inlet passage and an air outlet passage are respectively arranged on the upper end face of the valve core along the length direction of the valve core; a valve core air inlet and a valve core air outlet are respectively arranged on the valve core between the first sealing boss and the second sealing boss and between the sec