Plumb bob device for determining the bed height of bulk material

Details Plumb bob device for determining the bed height of bulk material Plumb bob device for determining the bed height of bulk material

1991-04-18

1991-10-22

Haroian, Harry N.

Geometrical instruments

Distance measuring

Sounding type

33715, 33716, G01F 2304

Patent

active

050582887

ABSTRACT:
The present invention pertains to a plumb bob device for determining the bed height of bulk material in a shaft furnace. The winding drum 1 for unwidning and rewinding a cable 5 or a chain with a plumb bob 6 suspended at its end is driven by a hydraulic motor 3. A displacement transducer 9 is driven by the shaft of the winding drum 1. The motor for driving the winding drum 1 is a so-called low-speed hydraulic motor 3. The displacement transducer 9 sends a signal associated with the actual measured depth to a pressure-proportional valve 10 directly, i.e., without an electrical control device. This valve presets a plumb bob holding pressure associated with the actual depth for the hydraulic motor 3.

REFERENCES:
patent: 3500546 (1970-03-01), Pilcher
patent: 3742307 (1973-06-01), Patsch et al.
patent: 4255859 (1981-03-01), Klieman

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