Non-return device for air intake of outer pipe of double-wall pipe

The utility model provides a non-return device for air inflow of an outer pipe of a double-wall pipe. The non-return device is installed at the air inlet end of the outer pipe of the double-wall pipe. The device comprises a pipe body, a valve plate and a mandrel. Wherein the valve plate and the mand...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHU ZHIMIN, LIU YOUKUN
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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