STOCK-ROD SYSTEM FOR DETERMINING THE BURDEN LEVEL IN A SHAFT FURNACE

摘要

The invention relates to a plummet device for determining the height of the charge in a blast furnace. The winding drum (1) for raising and lowering a rope (5) or a chain, to the end of which is attached a plummet (6), is driven by a hydromotor (3). The shaft of the winding drum (1) drives a displacement transducer (9). The motor used to drive the winding drum (1) is a so-called slow-running hydromotor (3). A signal which is matched to the respective measurement depth is transmitted by the displacement transducer (9) directly, i.e. without electric control, to a pressure-proportioning valve (10). At the hydromotor (3), this valve sets a plummet-holding pressure appropriate to the respective depth.