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GB1472888A - Safety cut-off valves for gas supply systems - Google Patents

Safety cut-off valves for gas supply systems

Info

Publication number
GB1472888A
GB1472888A GB4314474A GB4314474A GB1472888A GB 1472888 A GB1472888 A GB 1472888A GB 4314474 A GB4314474 A GB 4314474A GB 4314474 A GB4314474 A GB 4314474A GB 1472888 A GB1472888 A GB 1472888A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
spring
closure member
pressure
valve
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.)
Expired
Application number
GB4314474A
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.)
Bryan Donkin Co Ltd
Original Assignee
Bryan Donkin Co 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 Bryan Donkin Co Ltd filed Critical Bryan Donkin Co Ltd
Priority to GB4314474A priority Critical patent/GB1472888A/en
Publication of GB1472888A publication Critical patent/GB1472888A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20Excess-flow valves
    • F16K17/22Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/32Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Safety Valves (AREA)

Abstract

1472888 Valves BRYAN DONKIN CO Ltd 22 Sept 1975 [4 Oct 1974] 43144/74 Heading F2V A safety cut-off valve for a gas supply system has a closure member 16 latched in an open condition, the latching mechanism being responsive to mass flow through the valve, i.e. to flow velocity and to absolute pressure. The latching mechanism comprises a pivoted lever 19 engaging the closure member and held in the position shown by a horseshoe magnet 84 which acts on a soft-iron armature, 96 mounted on the lever, through a pair of soft iron plugs 92 (Fig. 4). A diaphragm 58 controls the position of the magnet 84. This diaphragm is made sensitive to flow velocity by subjecting it to the pressure on either side of an orifice plate 76. A rolling diaphragm 38 provides the response to absolute pressure: it is adjustably loaded by a spring 48 and acts on the diaphragm 58 by controllng the loading effect of spring 68. When the predetermined mass flow condition is exceeded the magnet 84 rises and engages a soft iron keeper 98 (Fig. 4) and in doing so effectively short-circuits the plugs 92 so that immediate release of the latch takes place permitting the closure member to close under the influence of a torsion spring 28. The pivot 17 (or the closure member) is axially slidable against a spring 15, Fig. 4, so that on pressing it inwards hexagonal portions engage hexagonal holes in the closure member for re-setting the latter by rotating the shaft. In an alternative embodiment, Fig. 6 (not shown), the magnetic latch is replaced by a mechanical latch embodying a spring-loaded "over-centre" link mechanism. In a modification, Fig. 7, which can be applied to either of the above embodiments, the diaphragm 58 is connected to the lower end of the rod 42 loaded by the spring 48 and also to a bellows 102 to reduce the pressure-effective area of the diaphragm 58 in the chamber 54 thus making the pressure-effective areas of the diaphragm unequal. This produces the desired response to absolute pressure and velocity of flow. In other embodiments pistons can be used instead of diaphragms and the pressure tapping points could be taken from either side of the seat 18 as shown chain-dotted in Fig. 1, and the gauge pressures could be taken from a gas main to which the valve is connected.
GB4314474A 1975-09-22 1975-09-22 Safety cut-off valves for gas supply systems Expired GB1472888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4314474A GB1472888A (en) 1975-09-22 1975-09-22 Safety cut-off valves for gas supply systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4314474A GB1472888A (en) 1975-09-22 1975-09-22 Safety cut-off valves for gas supply systems

Publications (1)

Publication Number Publication Date
GB1472888A true GB1472888A (en) 1977-05-11

Family

ID=10427506

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4314474A Expired GB1472888A (en) 1975-09-22 1975-09-22 Safety cut-off valves for gas supply systems

Country Status (1)

Country Link
GB (1) GB1472888A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012142418A1 (en) * 2011-04-15 2012-10-18 Emerson Process Management Regulator Technologies, Inc. Torsional spring for a slam-shut safety device
IT201800004433A1 (en) * 2018-04-12 2019-10-12 ANTI-FLOOD SAFETY DEVICE FOR A WASHING MACHINE OF THE TYPE INCLUDING ROTATING MAGNETS
CN111396607A (en) * 2020-03-19 2020-07-10 刘超 Automatic water injection flow adjusting device
CN113090800A (en) * 2021-05-12 2021-07-09 陈蕾蕾 Mechanical valve with automatic flow-off function

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012142418A1 (en) * 2011-04-15 2012-10-18 Emerson Process Management Regulator Technologies, Inc. Torsional spring for a slam-shut safety device
US9151400B2 (en) 2011-04-15 2015-10-06 Emerson Process Management Regulator Technologies, Inc. Torsional spring for a slam-shut safety device
US20160025234A1 (en) * 2011-04-15 2016-01-28 Emerson Process Management Regulator Technologies, Inc. Torsional Spring for a Slam-Shut Safety Device
RU2608669C2 (en) * 2011-04-15 2017-01-23 Эмерсон Процесс Менеджмент Регьюлэйтор Текнолоджиз, Инк. Operating at twisting spring for quick-acting safety locking device
US9593781B2 (en) * 2011-04-15 2017-03-14 Emerson Process Management Regulator Technologies, Inc. Torsional spring for a slam-shut safety device
IT201800004433A1 (en) * 2018-04-12 2019-10-12 ANTI-FLOOD SAFETY DEVICE FOR A WASHING MACHINE OF THE TYPE INCLUDING ROTATING MAGNETS
EP3553222A1 (en) * 2018-04-12 2019-10-16 TP Reflex Group S.p.A. Anti-flooding safety device for a washing machine, of the type comprising rotatable magnets
CN111396607A (en) * 2020-03-19 2020-07-10 刘超 Automatic water injection flow adjusting device
CN113090800A (en) * 2021-05-12 2021-07-09 陈蕾蕾 Mechanical valve with automatic flow-off function

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee