STEUERVENTIL FUER HYDRAULISCH SCHREITENDEN STREBAUSBAU

Powered mine supports control valve to switch cylinder feedlines to feed and bleed supply lines incorporates a button or plunger narrow-passage admission valve (21) leading to a pressure chamber (14) to link this to the return (4). A longitudinally operating piston (5) forms a differential piston (1...

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Bibliographische Detailangaben
1. Verfasser:	SCHUERMANN,HORST
Format:	Patent
Sprache:	ger
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING EARTH DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GALLERIES GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LARGE UNDERGROUND CHAMBERS LIGHTING MECHANICAL ENGINEERING MINING SHAFTS TAPS THERMAL INSULATION IN GENERAL TUNNELS VALVES WEAPONS
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Beschreibung
Zusammenfassung:	Powered mine supports control valve to switch cylinder feedlines to feed and bleed supply lines incorporates a button or plunger narrow-passage admission valve (21) leading to a pressure chamber (14) to link this to the return (4). A longitudinally operating piston (5) forms a differential piston (15) with orifice (17) within this chamber so that the high pressure feedline (2) can couple to the chamber through a hole (19) and a choke (18) formed in the differential piston (15). The piston face (f1) ahead of this choke (18) near the high pressure line is smaller than the face (f2) on the far side of the choke. In the region of the high pressure feedline the piston (5) has a valve cone (6) which seats in the housing (1) when the admission valve (21) is closed divorcing the high pressure feed from the consumer supply line (3) and similarly from the return (4). During this, a second valve cone (9) in the piston remains open to the return line.