Wall type negative pressure valve device capable of longitudinally pressurizing

A wall type negative pressure valve device capable of being pressurized longitudinally comprises a wall type connector, the wall type connector is tubular, a first spigot and a second spigot are arranged in the wall type connector, a sealing plug is arranged between the first spigot and the second s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHAO JIN, CHEN TIANNING, YAN YILI, HUO KAILUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HUMAN NECESSITIES HYGIENE JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A wall type negative pressure valve device capable of being pressurized longitudinally comprises a wall type connector, the wall type connector is tubular, a first spigot and a second spigot are arranged in the wall type connector, a sealing plug is arranged between the first spigot and the second spigot, a connector is arranged on the right side of a third spigot in the wall type connector, and a second spigot is arranged on the right side of the third spigot in the wall type connector. A second sealing ring is arranged on the right end face of the third spigot, a third sealing ring is arranged on the left end face of the connector, a groove is formed in the side wall of the connector, a rotating rod is hinged to the interior of the groove through a pin shaft, and an opening and an inner cavity are formed in the left side wall of the groove. A second spring and a reset rod are arranged in the inner cavity, and the connector is sleeved with a pressure adjusting knob. According to the wall type negative pressu