EP3279533A1 - Système de commande pour trajet de gaz sous pression - Google Patents

Système de commande pour trajet de gaz sous pression Download PDF

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Publication number
EP3279533A1
EP3279533A1 EP17184061.4A EP17184061A EP3279533A1 EP 3279533 A1 EP3279533 A1 EP 3279533A1 EP 17184061 A EP17184061 A EP 17184061A EP 3279533 A1 EP3279533 A1 EP 3279533A1
Authority
EP
European Patent Office
Prior art keywords
stem
actuator
control system
opening
coupling element
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.)
Withdrawn
Application number
EP17184061.4A
Other languages
German (de)
English (en)
Inventor
Christopher John COWLES
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP3279533A1 publication Critical patent/EP3279533A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/035—Flow reducers

Definitions

  • the present invention relates to a control system for a pressurised gas path.
  • This may be a shut-off valve which is able to selectively open and close the pressurised gas path. It is equally applicable to a regulator which is able to provide a controlled pressure reduction in the pressure of a high pressure gas stream.
  • Such shut-off valves and regulators are commonly used on free-standing gas bottles to control the gas flow.
  • Such control systems will include a stem which is axially moveable towards and away from a seat to selectively control the pressured gas path.
  • the stems are moveable manually, for example using a hand wheel mechanism.
  • the present invention is able to protect vulnerable components within the system from damage.
  • the control system may be a valve system in which the stem is the valve stem and the opening is a valve seat.
  • the control system may be a regulator in which the stem is the regulator spindle and the opening is the regulator seat.
  • the coupling element may be an element which can selectively engage between the stem and the actuator.
  • the or each coupling element is preferably a ball bearing.
  • this is provided in one of the stem and the actuator and is biased into an opening in the other of the stem and actuator.
  • the biasing force is provided by a helical spring.
  • the coupling element may be a projection from one of the stem and actuator which is biased into an opening in the other of the stem and actuator.
  • the coupling element may be individually biased as in the above-mentioned ball bearing or alternatively there may be a single component comprising all of the coupling elements with the biasing being applied to the single element.
  • the single element may be the stem or actuator or may be a plate between the stem and actuator.
  • the control system may be used on pressurised mains gas supply lines. However, preferably, the control system is provided on a bottle of pressurised gas.
  • the shut-off valve 1 comprises a valve body 2 which has a screw-threaded attachment 3 for attachment to a high pressure gas cylinder. There is a high pressure gas path 4 and a high pressure outlet 5, flow through which is controlled by a valve element 6 which seats on a valve seat 7.
  • the valve element 6 is moved by a spindle 13. This has a lower spindle 8 which retains the valve element 6 and an upper spindle 9 which engages with a hand wheel 10 and is held in place by a retaining nut 11.
  • the spindle is guided and sealed by a gland nut 12 and the upper and lower spindles are rotatable together as they are engaged via square drive flats.
  • the hand wheel 10 In order to open the valve, the hand wheel 10 is rotated which rotates the upper and lower spindles to lift the valve element 6 and hence allows flow from the high pressure gas path 4 to the high pressure outlet 5.
  • the valve seat is commonly made of a soft material such as a polymer. If a user overtightens the hand wheel 10, this can be damaged. There is also an end stop between the upper spindle 9 and gland nut 12 to limit the upper travel of the spindle and this can also be damaged by excessive rotation of the hand wheel 10.
  • a regulator 20 is shown in Fig. 2 .
  • This comprises a regulator body 21 which is attached to a high pressure inlet 22 for example the high pressure outlet 5 of the previous example.
  • the regulator body 21 has a low pressure outlet 23 to supply gas at a regulated pressure for an external application.
  • a regulating element in the form of a sealing element 24 and a shuttle 25 which is biased towards the regulator seat by a spring 27.
  • a piston 28 (or a diaphragm) which is sealed to a regulator chamber 29 by an O-ring 30 is biased downwardly by a regulator spring 31.
  • the biasing force is set by a spindle 32 which is retained by a gland nut 33 and is rotatable via a hand wheel 34 retained in place by a retaining nut 35. Rotation of the hand wheel 34 rotates the spindle 32 which moves downwardly to act via a plate 36 to compress the spring 31 and hence increase the biasing force on the piston 28.
  • the shuttle 25 allows gas flow through the regulator seat 26. The more the regulator spring 31 is compressed, the higher the differential and the higher the outlet pressure setting will be.
  • the axial movement of the spindle 32 is limited by impingement of the piston 28 on the bottom of the chamber 29.
  • there is an upper stop where a shoulder 37 on the spindle 32 impinges with an upper surface of the chamber 29. Damage to the regulator can occur when over torque of the hand wheel in the opening and closing directions forces the spindle 32 against the end stops.
  • FIG. 3 to 5 A first example of the present invention is shown in Figs. 3 to 5 .
  • This example describes the interface between the hand wheel and the spindle.
  • this could be the spindle 7 and hand wheel 10 of the shut-off valve of Fig. 1 or the spindle 32 and hand wheel 34 of the regulator of Fig. 2 .
  • the improvement provided is the provision of four coupling elements in the form of ball bearings 40.
  • ball bearings 40 There may be any number of such ball bearings.
  • a bearing plate 43 is attached to the spindle 7, 32.
  • the bearing plate has a number of downwardly bent tongues 44 which effectively create a recess 45 to receive each ball bearing 40.
  • FIG. 6 to 8 A second example is shown in Figs. 6 to 8 .
  • the ball bearings 40 have been replaced by projections 50 but the bearing plate 43 remains the same.
  • the biasing force is provided by a single spring 51 which acts to bias the hand wheel 10, 34 downwardly into engagement with the bearing plate 43. This time, overtightening of the hand wheel 10, 34 against an end stop will cause the projections 50 to ride up on to the bearing plate 43 compressing the spring 51 and thereby decoupling the hand wheel 10, 34 from the spindles 7, 32.
  • FIG. 9 A third example is shown in Fig. 9 .
EP17184061.4A 2016-08-01 2017-07-31 Système de commande pour trajet de gaz sous pression Withdrawn EP3279533A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1613242.5A GB2552782A (en) 2016-08-01 2016-08-01 A control system for a pressurised gas path

Publications (1)

Publication Number Publication Date
EP3279533A1 true EP3279533A1 (fr) 2018-02-07

Family

ID=56936669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17184061.4A Withdrawn EP3279533A1 (fr) 2016-08-01 2017-07-31 Système de commande pour trajet de gaz sous pression

Country Status (4)

Country Link
EP (1) EP3279533A1 (fr)
AU (1) AU2017210518A1 (fr)
CA (1) CA2975055A1 (fr)
GB (1) GB2552782A (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608377A (en) * 1947-02-01 1952-08-26 George B Scarlett Valve operating device
US3053498A (en) * 1960-12-12 1962-09-11 Pacific Valves Inc Clutch hand wheel for a soft seat valve
WO1985003754A1 (fr) * 1984-02-17 1985-08-29 Williams William J Poignee de vanne reglable limitant la torsion
USH636H (en) * 1988-09-15 1989-06-06 The United States Of America As Represented By The United States Department Of Energy Torque limited drive for manual valves
US5295907A (en) * 1990-05-04 1994-03-22 Ava International Corporation Rorque limiting device
US6328280B1 (en) * 2000-07-28 2001-12-11 Gilbert Davidson Compressed gas regulator with torque limiting attachment knob
US6681949B2 (en) * 2002-05-21 2004-01-27 Kenneth R. Tibor Torquing-limiting apparatus
US7584936B2 (en) * 2006-09-07 2009-09-08 Matheson Tri-Gas, Inc. Torque limiting hand wheel
US8262059B2 (en) * 2006-05-04 2012-09-11 Flowserve Management Company Handwheel torque limitor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564584A (en) * 1995-01-13 1996-10-15 Western Industries, Inc. Vent cap for discharging nearly empty propane cylinders
US7334598B1 (en) * 2004-06-16 2008-02-26 Anthony Scott Hollars Pressure regulator adaptable to compressed gas cartridge

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608377A (en) * 1947-02-01 1952-08-26 George B Scarlett Valve operating device
US3053498A (en) * 1960-12-12 1962-09-11 Pacific Valves Inc Clutch hand wheel for a soft seat valve
WO1985003754A1 (fr) * 1984-02-17 1985-08-29 Williams William J Poignee de vanne reglable limitant la torsion
USH636H (en) * 1988-09-15 1989-06-06 The United States Of America As Represented By The United States Department Of Energy Torque limited drive for manual valves
US5295907A (en) * 1990-05-04 1994-03-22 Ava International Corporation Rorque limiting device
US6328280B1 (en) * 2000-07-28 2001-12-11 Gilbert Davidson Compressed gas regulator with torque limiting attachment knob
US6681949B2 (en) * 2002-05-21 2004-01-27 Kenneth R. Tibor Torquing-limiting apparatus
US8262059B2 (en) * 2006-05-04 2012-09-11 Flowserve Management Company Handwheel torque limitor
US7584936B2 (en) * 2006-09-07 2009-09-08 Matheson Tri-Gas, Inc. Torque limiting hand wheel

Also Published As

Publication number Publication date
AU2017210518A1 (en) 2018-02-15
GB201613242D0 (en) 2016-09-14
GB2552782A (en) 2018-02-14
CA2975055A1 (fr) 2018-02-01

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