Control systems and arrangements for mineral mining installation

Details Control systems and arrangements for mineral mining installation Control systems and arrangements for mineral mining installation

1977-02-07

1978-09-12

Schwadron, Martin P.

Power plants

Pressure fluid source and motor

Pulsator

60547, 60591, 60593, 91 40, 91411R, F15B 702

Patent

active

041126807

ABSTRACT:
In a mineral mining installation employing a series of shifting rams for advancing a scraper-chain conveyor provided with a guide for a mining machine, a control system is used to provide a succession of small fluid doses to the rams. Control signals, preferably remotely generated, serve to actuate local valves to cause a selected one or group of piston and cylinder metering devices to alternately accept and expel pressure fluid from a working chamber. In this way a pre-determined volume of pressure fluid can be transferred to one or more of the rams to effect the shifting advancement. This volume of pressure fluid is made up from a succession of small fluid doses each a small fraction of the desired shifting distance so that by repeated cycles of the device or devices the ram or rams associated therewith can extend in fine defined increments.

REFERENCES:
patent: 3965797 (1976-06-01), Grisebach
patent: 4046058 (1977-09-01), Grisebach

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