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Title: Expandable mixing section gravel and cobble eductor

In a hydraulically powered pump for excavating and transporting slurries in hich it is immersed, the improvement of a gravel and cobble eductor including an expandable mixing section, comprising: a primary flow conduit that terminates in a nozzle that creates a water jet internal to a tubular mixing section of the pump when water pressure is applied from a primary supply flow; a tubular mixing section having a center line in alignment with the nozzle that creates a water jet; a mixing section/exit diffuser column that envelopes the flexible liner; and a secondary inlet conduit that forms an opening at a bas portion of the column and adjacent to the nozzle and water jet to receive water saturated gravel as a secondary flow that mixes with the primary flow inside of the mixing section to form a combined total flow that exits the mixing section and decelerates in the exit diffuser.
 [1];  [2]
  1. (Kenyon, MN)
  2. (Lakeville, MN)
Issue Date:
OSTI Identifier:
United States of America as represented by Department of Energy (Washington, DC) NETL
Patent Number(s):
US 5667365
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
Country of Publication:
United States
expandable; mixing; section; gravel; cobble; eductor; hydraulically; powered; pump; excavating; transporting; slurries; immersed; improvement; including; comprising; primary; flow; conduit; terminates; nozzle; creates; water; jet; internal; tubular; pressure; applied; supply; center; line; alignment; exit; diffuser; column; envelopes; flexible; liner; secondary; inlet; forms; bas; portion; adjacent; receive; saturated; mixes; inside; form; combined; total; exits; decelerates; water pressure; flow conduit; center line; mixing section; water jet; inlet conduit; secondary flow; cobble eductor; expandable mixing; flexible line; /417/