Electrode-slipping apparatus for electric furnaces

Details Electrode-slipping apparatus for electric furnaces Electrode-slipping apparatus for electric furnaces

1979-05-25

1981-09-29

Envall, Jr., Roy N.

13 16, H05B 710

Patent

active

042924600

ABSTRACT:
An electrode-slipping apparatus for electric furnaces comprises an electrode, a hydraulic hoist with electrode-slipping hydraulic mechanisms mounted thereon, a locking ring, contact shoes with a clamp and hydraulic clamping mechanisms, a locking ring control valve, a slide valve for controlling the electrode-slipping hydraulic mechanisms, a hydraulic fluid pressure control unit and a programming unit. According to the invention, there is provided between the electrode-slipping mechanisms and the slide valve in the hydraulic fluid pressure and drain line a sliding spool flow control valve for continuously effecting the meter-out flow control in the electrode-slipping hydraulic mechanisms coupled to the programming unit.

REFERENCES:
patent: 2896003 (1959-07-01), Eaton
patent: 2903494 (1959-09-01), Meffert
patent: 3213176 (1965-10-01), Krogsrud

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