Method and apparatus for sequence control of vertical movements

Details Method and apparatus for sequence control of vertical movements Method and apparatus for sequence control of vertical movements

1982-02-22

1984-08-21

Nase, Jeffrey V.

Conveyors: fluid current

With means to control conveying fluid or movement of load in...

Control of conveying fluid

137115, 417299, 406 99, 406197, B65G 5366

Patent

active

044667590

ABSTRACT:
A method and apparatus for sequence control of vertical movement of slurried particulates from a lower level to the upper levels, more particularly a vertical hoist system for movement of slurry from a subterranean mine area upward through an earthen or cased borehole to a surface station. The vertical pump system includes series-connected pumps having variable speed capability to transport slurry particulate from an underground sump upward to a surface surge tank or other repository. The logic sequence system exercises control over valving sequence between the underground pumps and the vertical borehole in order to control slurry surges during start-up, shut-down and emergency dump operations. Thus, the pump input to the vertical conduit utilizes energy dissipator units as selectively controlled by automated block and by-pass valves to control flow of fluids from the pumps upward through the vertical conduit. Selective control of the dissipator units and valving enable critical start-up, shut-down and the emergency shut-down operations and this is effected by particular sequence control.

REFERENCES:
patent: 3260548 (1966-07-01), Reichl
patent: 3723025 (1973-03-01), Coakley
patent: 3966261 (1976-06-01), Doerr et al.
patent: 4244388 (1981-01-01), Feiss

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