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GB2019982A - Safety closure device - Google Patents

Safety closure device

Info

Publication number
GB2019982A
GB2019982A GB7914736A GB7914736A GB2019982A GB 2019982 A GB2019982 A GB 2019982A GB 7914736 A GB7914736 A GB 7914736A GB 7914736 A GB7914736 A GB 7914736A GB 2019982 A GB2019982 A GB 2019982A
Authority
GB
United Kingdom
Prior art keywords
piston
equilibrium position
pressure difference
normal
flow
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
GB7914736A
Other versions
GB2019982B (en
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.)
TULCEA SA
Original Assignee
TULCEA SA
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
Priority claimed from CH474278A external-priority patent/CH624193A5/en
Priority claimed from CH1251478A external-priority patent/CH625862A5/en
Application filed by TULCEA SA filed Critical TULCEA SA
Publication of GB2019982A publication Critical patent/GB2019982A/en
Application granted granted Critical
Publication of GB2019982B publication Critical patent/GB2019982B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Measuring Fluid Pressure (AREA)
  • Pipe Accessories (AREA)
  • Control Of Fluid Pressure (AREA)
  • Safety Valves (AREA)
  • Sliding Valves (AREA)

Abstract

The device comprises a conduit 1 for introduction to a pressurised distribution system and a piston 31, 32 automatically displaceable to sealingly cooperate with seating 8 in the event of excessive pressure differential across the piston, e.g. due to a fracture in a downstream pipe. The piston is re-opened by knob 42. As shown, in the normal equilibrium position of the piston, fluid flow is established between the inlet 13 and outlet 12 via arcuate passages 33, 34 in two relatively rotatable piston parts 31, 32. Relative rotation of the latter adjusts the flow duct section at 33, 34 to set the pressure difference across the piston for normal flow conditions. Axial movement of the piston is restrained, as by the frictional grip provided by seal 6, to maintain the piston in its equilibrium position until a threshold value of the pressure difference is exceeded. Other embodiments incorporate, respectively, adjustable magnets and a diaphragm subjected to fluid pressure to provide the axial restraining means. The drive for rotating the relevant piston part may include gearing. <IMAGE>
GB7914736A 1978-05-02 1979-04-27 Safety closure device Expired GB2019982B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH474278A CH624193A5 (en) 1978-05-02 1978-05-02 Safety shut-off device for a pressurised fluid circuit or pipeline
CH1251478A CH625862A5 (en) 1978-12-07 1978-12-07 Safety shut-off device for a pressurised circuit or pipeline

Publications (2)

Publication Number Publication Date
GB2019982A true GB2019982A (en) 1979-11-07
GB2019982B GB2019982B (en) 1982-08-18

Family

ID=25696177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7914736A Expired GB2019982B (en) 1978-05-02 1979-04-27 Safety closure device

Country Status (9)

Country Link
CA (1) CA1138298A (en)
DE (1) DE2916532A1 (en)
ES (1) ES479778A1 (en)
FR (1) FR2425025A1 (en)
GB (1) GB2019982B (en)
IT (1) IT1118543B (en)
NL (1) NL7903247A (en)
SE (1) SE442050B (en)
SU (1) SU980635A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103968124A (en) * 2014-05-04 2014-08-06 刘平 Safety valve for tap water

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1303204B (en) * Willis Oil Tool Co
FR876840A (en) * 1939-11-06 1942-11-18 Sarl Alfred Teves Safety device for pressurized pipelines in the event of tube rupture
US2635629A (en) * 1950-02-08 1953-04-21 Asaro Carmelo Excess flow cutoff valve
DE1086570B (en) * 1956-05-18 1960-08-04 Franz Schwarte Fa Device for the automatic shut-off of pressure lines, especially for the braking system of motor vehicles
US2921440A (en) * 1957-10-03 1960-01-19 Alex Mfg Corp Safety devices for contained fluid pressure systems
US3060959A (en) * 1960-07-07 1962-10-30 Olin Mathieson Excess flow cut-off valve
DE1192475B (en) * 1961-06-15 1965-05-06 Akad Wissenschaften Ddr Stepless gear for high reductions
DE1174125B (en) * 1962-11-24 1964-07-16 Sebastian Schlaifer Pipe rupture valve
DE1192473B (en) * 1963-10-22 1965-05-06 Sebastian Schlaifer Pipe rupture valve
DE2522443A1 (en) * 1975-05-21 1976-12-02 Schell Kg Hubert Water valve with two seats, one for high pressure - preventing exit of water in case of leaks or detachment of hose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103968124A (en) * 2014-05-04 2014-08-06 刘平 Safety valve for tap water

Also Published As

Publication number Publication date
SU980635A3 (en) 1982-12-07
DE2916532A1 (en) 1979-11-08
FR2425025B1 (en) 1983-04-08
FR2425025A1 (en) 1979-11-30
IT7967691A0 (en) 1979-04-03
SE7903747L (en) 1979-11-03
GB2019982B (en) 1982-08-18
IT1118543B (en) 1986-03-03
NL7903247A (en) 1979-11-06
ES479778A1 (en) 1980-01-16
SE442050B (en) 1985-11-25
CA1138298A (en) 1982-12-28

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Legal Events

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