GB2544793A8 - Cryogen pumping system - Google Patents

Cryogen pumping system Download PDF

Info

Publication number
GB2544793A8
GB2544793A8 GB1520991.9A GB201520991A GB2544793A8 GB 2544793 A8 GB2544793 A8 GB 2544793A8 GB 201520991 A GB201520991 A GB 201520991A GB 2544793 A8 GB2544793 A8 GB 2544793A8
Authority
GB
United Kingdom
Prior art keywords
pump
flow
outflow
inflow
cryogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1520991.9A
Other versions
GB2544793B (en
GB2544793A (en
GB201520991D0 (en
Inventor
Matthews Anthony
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oxford Instruments Nanotechnology Tools Ltd
Original Assignee
Oxford Instruments Nanotechnology Tools Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oxford Instruments Nanotechnology Tools Ltd filed Critical Oxford Instruments Nanotechnology Tools Ltd
Priority to GB1520991.9A priority Critical patent/GB2544793B/en
Publication of GB201520991D0 publication Critical patent/GB201520991D0/en
Publication of GB2544793A publication Critical patent/GB2544793A/en
Publication of GB2544793A8 publication Critical patent/GB2544793A8/en
Application granted granted Critical
Publication of GB2544793B publication Critical patent/GB2544793B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/06—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means
    • F04B37/08—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means by condensing or freezing, e.g. cryogenic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

Disclosed is a cryogen pumping system 1 comprising a cryogen pump 10 with an inflow element 12, an outflow element 14 and a conduit 30 connected between the inflow element and the outflow element and comprising a flow restriction 34. The flow restriction is configured to limit the rate of cryogenic fluid flow through the conduit to less than the rate of flow producible by the pump when in use so as to maintain an operational pressure differential in the cryogenic fluid between the inflow element and outflow element. The flow restrictor may be a throttle, a static flow impedance, a narrower bore diameter or a sheet with an orifice. Preferably the flow restriction allows fluid to flow from the outflow side of the pump to the inflow side of the pump when the pump is inactive so as to equalise any pressure differential across the pump that may cause the pump to stall on start-up. Also claimed is a dilution refrigeration system and a cryostat system.
GB1520991.9A 2015-11-27 2015-11-27 Cryogen pumping system Active GB2544793B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1520991.9A GB2544793B (en) 2015-11-27 2015-11-27 Cryogen pumping system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1520991.9A GB2544793B (en) 2015-11-27 2015-11-27 Cryogen pumping system

Publications (4)

Publication Number Publication Date
GB201520991D0 GB201520991D0 (en) 2016-01-13
GB2544793A GB2544793A (en) 2017-05-31
GB2544793A8 true GB2544793A8 (en) 2017-06-28
GB2544793B GB2544793B (en) 2021-01-27

Family

ID=55177362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1520991.9A Active GB2544793B (en) 2015-11-27 2015-11-27 Cryogen pumping system

Country Status (1)

Country Link
GB (1) GB2544793B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052900A (en) * 1990-04-11 1991-10-01 Austin Jon W Pressure relief valve for positive pressure pumps
JP2002089455A (en) * 2000-09-12 2002-03-27 Teikku Kk Blood pump
KR100451651B1 (en) * 2001-12-13 2004-10-08 엘지전자 주식회사 The structure for preventing the reverse - rotation of centrifugal compressor
KR100531838B1 (en) * 2004-04-22 2005-11-30 엘지전자 주식회사 Pressure balance apparatus for compressor of airconditioner

Also Published As

Publication number Publication date
GB2544793B (en) 2021-01-27
GB2544793A (en) 2017-05-31
GB201520991D0 (en) 2016-01-13

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