FLOW PATH SWITCHING DEVICE AND METHOD FOR PREVENTING DRY RUNNING OF SUBMERGED-TYPE PUMP

WIPO Patent Application WO/2022/113450

A1

The present invention relates to technology for preventing dry running of a submerged-type pump used for transferring liquefied gas such as liquefied ammonia, liquid hydrogen, liquid nitrogen, liquefied natural gas, liquefied ethylene gas, and liquefied petroleum gas. A flow path switching device (5) comprises a flow path structure (45) that has a first flow path (41), a second flow path (42), and a third flow path (43), and a valve (47) that is disposed in the flow path structure (45) and that selectively connects the third flow path (43) to the first flow path (41) or the second flow path (42), wherein the first flow path (41) is connected to a discharge opening (1b) of the submerged-type pump (1), the second flow path (42) is connected to the inside of an intake container (2), and the third flow path (43) is connected to a discharge port (8) of the intake container (2).

JPS52127602	SEWAGE PUMP
WO/2010/149455	CIRCULATING SYSTEM FOR FOOD-COMPATIBLE FLUIDS
JP2008082318	PUMP WITH ELECTRIC MOTOR IMMERSED IN FLUID TO BE PUMPED UP

HONDA SHUICHIRO (JP)
KASATANI TETSUJI (JP)
IKEDA HAYATO (JP)
IWAMI MITSUTAKA (JP)

PCT/JP2021/031502

June 02, 2022

August 27, 2021

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EBARA CORP (JP)

F04D7/02; F04D13/08; F04D29/44

JPH06307376A	1994-11-01
JP2007024166A	2007-02-01
JPS582497A	1983-01-08
JPS61162579U	1986-10-08
JP4300088B2	2009-07-22
JPS59159795U	1984-10-26
JPS6231680U	1987-02-25

HIROSAWA, Tetsuya et al. (JP)

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