公开(公告)号：US20240360832A1

公开(公告)日：2024-10-31

申请号：US18682528

申请日：2022-08-09

Applicant: EBARA CORPORATION

Inventor： Shuichiro HONDA ,  Tetsuji KASATANI ,  Hayato IKEDA ,  Mitsutaka IWAMI ,  Kei WATAJI ,  Hyuga KIKUCHI

IPC: F04D13/08 ,  F04D7/00 ,  F04D19/04

CPC classification number: F04D13/08 ,  F04D7/00 ,  F04D19/04

Abstract: A purge apparatus is provided. The purge apparatus is capable of preventing air from being entrained when a submersible pump is moved into a pump column, and capable of warming the submersible pump when the submersible pump is removed from the pump column to thereby prevent component of the air from being liquefied, thus preventing the liquefied gas from being emitted in the atmosphere. The purge apparatus includes a hermetic purge container configured to accommodate the submersible pump therein; a vacuum line coupled to the hermetic purge container and coupled to a vacuum source; a purge-gas supply line coupled to the hermetic purge container and coupled to a purge-gas supply source; and a purge-gas supply valve mounted to the purge-gas supply line.

公开(公告)号：US20240344529A1

公开(公告)日：2024-10-17

申请号：US18681592

申请日：2022-08-09

Applicant: EBARA CORPORATION

Inventor： Shuichiro HONDA ,  Tetsuji KASATANI ,  Hayato IKEDA ,  Mitsutaka IWAMI

IPC: F04D29/60 ,  F04B15/08 ,  F04D13/08

CPC classification number: F04D29/607 ,  F04B15/08 ,  F04D13/08 ,  F04D29/604 ,  F04B2015/0822

Abstract: An elevating apparatus that can eliminate a need for a permanently installed large hoist is provided. The elevating apparatus is used to elevate and lower a submersible pump in a pump column. The submersible pump is used for delivering liquefied gas. The elevating apparatus includes a cable including multiple split cables and multiple coupling links configured to detachably couple the multiple split cables to each other; and a take-up device coupled to the cable.

公开(公告)号：US20250060075A1

公开(公告)日：2025-02-20

申请号：US18721751

申请日：2022-12-21

Applicant: EBARA CORPORATION

Inventor： Tetsuji KASATANI ,  Shuichiro HONDA ,  Mitsutaka IWAMI ,  Kei WATAJI ,  Hyuga KIKUCHI ,  Asaki SUZUKI

IPC: F17C9/00

Abstract: A hollow container is provided above a hollow column around a liquefied gas pump. The container includes: an openable and closable lower plate members at a lower part of the container; manual opening/closing devices to be operated to open and close the lower plate members inside the container; glove boxes configured to allow a user to insert his or her hands from outside the container in order to operate the manual opening/closing devices inside the container; and work windows arranged near the glove boxes and the manual opening/closing devices so that the glove boxes and manual opening/closing devices are visible from outside the container.

公开(公告)号：US20240344664A1

公开(公告)日：2024-10-17

申请号：US18682207

申请日：2022-08-09

Applicant: EBARA CORPORATION ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Shuichiro HONDA ,  Tetsuji KASATANI ,  Hayato IKEDA ,  Mitsutaka IWAMI ,  Asaki SUZUKI ,  Koichiro YAMANOUCHI ,  Yuya YAMANE ,  Yuichi EMI ,  Tomonori TAKASE ,  Akihiko INOMATA

IPC: F17C9/00

CPC classification number: F17C9/00 ,  F17C2201/0104 ,  F17C2201/032 ,  F17C2201/052 ,  F17C2203/0333 ,  F17C2203/0391 ,  F17C2205/0323 ,  F17C2221/012 ,  F17C2223/0153 ,  F17C2223/047 ,  F17C2227/0142 ,  F17C2227/0178 ,  F17C2227/044 ,  F17C2250/0439 ,  F17C2250/0491

Abstract: A purge container (1) has a container body (21) having an interior space (20) for accommodating a submersible pump (2), an upper lid (23) configured to cover an upper opening of the container body (21), a lower lid (24) configured to cover a lower opening of the container body (21), and a purge-gas inlet port (27) and a purge-gas outlet port (28) communicating with the interior space (20) of the container main body (21). The container body (21) is secured to an upper portion of a pump column (3) in which the submersible pump (2) is to be installed.

公开(公告)号：US20250101986A1

公开(公告)日：2025-03-27

申请号：US18727741

申请日：2023-01-10

Applicant: EBARA CORPORATION

Inventor： Tetsuji KASATANI ,  Katsuyuki TAKANO ,  Mitsutaka IWAMI ,  Shuichiro HONDA ,  Kei WATAJI ,  Asaki SUZUKI

IPC: F04D7/00

Abstract: Provided is a container capable of raising a temperature of a liquid hydrogen pump during maintenance and a system including such a container. Provided is a maintenance system used for maintenance of a liquid hydrogen pump, the maintenance system including: a hollow container main body that allows a liquid hydrogen pump to pass through during maintenance, the container main body having one or more inlets and one outlet; a circulation flow path that connects the outlet and the one or more inlets; a blower that is provided on the circulation flow path and guides helium gas from the outlet to the one or more inlets to circulate the helium gas in the circulation flow path; and a heat exchanger that raises a temperature of the helium gas passing through the circulation flow path by atmosphere.

公开(公告)号：US20240360745A1

公开(公告)日：2024-10-31

申请号：US18681950

申请日：2022-08-09

Applicant: EBARA CORPORATION

Inventor： Shuichiro HONDA ,  Tetsuji KASATANI ,  Hayato IKEDA ,  Mitsutaka IWAMI ,  Kei WATAJI ,  Hyuga KIKUCHI

IPC: E21B43/12 ,  E21B17/02 ,  H02G9/00 ,  H02G11/02

CPC classification number: E21B43/128 ,  E21B17/0285 ,  H02G9/00 ,  H02G11/02

Abstract: The present invention relates to a power feeding apparatus and a power feeding method for supplying electric power to a submersible pump for delivering liquefied gas, such as liquefied ammonia, liquefied natural gas (LNG), or liquid hydrogen. The power feeding apparatus includes a first electrical contact secured to the submersible pump and electrically coupled to an electric motor of the submersible pump; a second electrical contact configured to contact the first electrical contact; and a power cable electrically coupled to the second electrical contact. At least a part of the second electrical contact is located in a pump column in which the submersible pump is arranged.

公开(公告)号：US20240353068A1

公开(公告)日：2024-10-24

申请号：US18683004

申请日：2022-08-09

Applicant: EBARA CORPORATION

Inventor： Shuichiro HONDA ,  Tetsuji KASATANI ,  Hayato IKEDA ,  Mitsutaka IWAMI

IPC: F17C9/00

CPC classification number: F17C9/00 ,  F17C2201/0104 ,  F17C2201/032 ,  F17C2201/052 ,  F17C2205/0323 ,  F17C2221/012 ,  F17C2223/0153 ,  F17C2223/046 ,  F17C2227/0142 ,  F17C2227/0178 ,  F17C2227/044 ,  F17C2250/0439 ,  F17C2250/0491

Abstract: An integrally-transportable purge container capable of preventing entry of air when a submersible pump is carried into a pump column, and capable of warming the submersible pump when it is removed from the pump column to prevent components of the air from being liquefied is provided. The integrally-transportable purge container includes: a container body having an interior space for accommodating a submersible pump therein; an upper lid configured to cover an upper opening of the container body; a lower lid configured to cover a lower opening of the container body; and a purge-gas inlet port and a purge-gas outlet port communicating with the interior space of the container body. The integrally-transportable purge container is detachably coupled to an upper portion of a pump column in which the submersible pump is to be installed. The integrally-transportable purge container is configured to be transportable together with the submersible pump.

公开(公告)号：US20240011492A1

公开(公告)日：2024-01-11

申请号：US18253610

申请日：2021-08-27

Applicant: EBARA CORPORATION

Inventor： Shuichiro HONDA ,  Tetsuji KASATANI ,  Hayato IKEDA ,  Mitsutaka IWAMI

IPC: F04D7/02 ,  F04D13/08 ,  F04D29/44

CPC classification number: F04D7/02 ,  F04D13/086 ,  F04D29/445

Abstract: The present invention relates to a technique of preventing idling rotation of a submersible pump used for delivering liquefied gas, such as liquefied ammonia, liquid hydrogen, liquid nitrogen, liquefied natural gas, liquefied ethylene gas, or liquefied petroleum gas. A fluid-path switching apparatus (5) includes: a flow-passage structure (45) having a first flow passage (41), a second flow passage (42), and a third flow passage (43); and a valve element (47) for allowing the third flow passage (43) to selectively communicate with the first flow passage (41) or the second flow passage (42). The first flow passage (41) communicates with a discharge outlet (1b) of the submersible pump (1), the second flow passage (42) communicates with an interior of the suction vessel (2), and the third flow passage (43) communicates with a discharge port (8) of the suction vessel (2).

公开(公告)号：US20210262481A1

公开(公告)日：2021-08-26

申请号：US17260771

申请日：2019-07-19

Applicant: Ebara Corporation

Inventor： Tetsuji KASATANI ,  Shuichiro HONDA

IPC: F04D29/08 ,  G01F23/00 ,  G01M3/28 ,  G01K13/00 ,  F16J15/18 ,  F16J15/34 ,  F16J15/447 ,  F04D29/40 ,  F04D27/00

Abstract: The present invention relates to a sealing system for a pump configured to pressurize a volatile liquid, such as liquid ammonia. The sealing system (2) includes a stuffing box (35) forming a barrier chamber (30) and a pump-side seal chamber (43), a mechanical seal (20) arranged in the barrier chamber (30), and a barrier-gas supply system (32) for supplying a barrier gas into the barrier chamber (30). The barrier gas has a pressure higher than a pressure of the volatile liquid in the pump-side seal chamber (43). The pump-side seal chamber (43) is located between an impeller (7) of the pump (1) and the mechanical seal (20). The barrier-gas supply system (32) includes a pressure control valve (50) configured to maintain a constant difference between pressure in the barrier chamber (30) and pressure in the pump-side seal chamber (43).