GB1306786A - Safety operation of fluid-pressure control systems - Google Patents

Safety operation of fluid-pressure control systems

Info

Publication number
GB1306786A
GB1306786A GB1146571*[A GB1146571A GB1306786A GB 1306786 A GB1306786 A GB 1306786A GB 1146571 A GB1146571 A GB 1146571A GB 1306786 A GB1306786 A GB 1306786A
Authority
GB
United Kingdom
Prior art keywords
valve
fluid
valves
cylinder
supply
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
GB1146571*[A
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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 CH751470A external-priority patent/CH524076A/en
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of GB1306786A publication Critical patent/GB1306786A/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
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/16—Trip gear
    • F01D21/18—Trip gear involving hydraulic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/004—Fluid pressure supply failure

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1306786 Fluid-pressure servomotor systems SULZER BROS Ltd 12 May 1971 [21 May 1970 6 Jan 1971] 14465/71 Heading G3P A by-pass valve 5 in a steam generator normally controlled by a fluid-pressure signal 18 applied to a control valve 15 is moved to open position by a spring 10 when opposite ends of a cylinder 2 are inter-connected through a valve 33 controlled by a solenoid-operated pilot valve 40 which receives its supply either from a pump 21 or from the upper end of the cylinder 2, the supply being taken automatically from whichever source is at the higher pressure through one of a pair of non-return valves 50, 52. Failure of the supply from the pump 21 cannot, therefore, prevent the system responding to energization of the pilot valve solenoid by a safety signal. Further, similarly controlled, valves 33<SP>1</SP>, 33<SP>11</SP> are arranged in parallel with the valve 33. An alternative arrangement is described in which the construction of the valves 33 and 40 is modified and non-return valves 32, 32<SP>1</SP> and 32<SP>11</SP> are replaced by a single non-return valve between the valve 33 and the space 2b in the cylinder.
GB1146571*[A 1970-05-21 1971-05-12 Safety operation of fluid-pressure control systems Expired GB1306786A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH751470A CH524076A (en) 1970-05-21 1970-05-21 Safety circuit
CH10171A CH533245A (en) 1970-05-21 1971-01-06 Safety circuit

Publications (1)

Publication Number Publication Date
GB1306786A true GB1306786A (en) 1973-02-14

Family

ID=25683520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1146571*[A Expired GB1306786A (en) 1970-05-21 1971-05-12 Safety operation of fluid-pressure control systems

Country Status (6)

Country Link
US (1) US3757646A (en)
BE (1) BE767456A (en)
CA (1) CA930283A (en)
FI (1) FI57172C (en)
FR (1) FR2090187B1 (en)
GB (1) GB1306786A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404065A (en) * 2018-10-12 2019-03-01 上海华电电力发展有限公司 Prevent host porthole blocking solenoid valve failure from causing the control method of unit tripping
US11644104B2 (en) 2021-03-18 2023-05-09 Mitsubishi Heavy Industries, Ltd. Steam valve

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971296A (en) * 1974-09-18 1976-07-27 Kelor Limited Pneumatic actuators
US4034815A (en) * 1975-03-20 1977-07-12 Caterpillar Tractor Co. Blade lift float circuit for motor graders
US4147325A (en) * 1977-03-29 1979-04-03 Combustion Engineering, Inc. Hydraulic control assembly
CH636932A5 (en) * 1979-06-22 1983-06-30 Sulzer Ag SAFETY CIRCUIT WITH A DOUBLE-ACTING, FLUID-OPERATED SERVO MOTOR.
WO1981000249A1 (en) * 1979-07-11 1981-02-05 J Muntjanoff Self adjusting actuator system
US4313633A (en) * 1979-07-11 1982-02-02 Caterpillar Tractor Co. Self adjusting actuator system
EP0496021B1 (en) * 1991-01-25 1994-11-30 Asea Brown Boveri Ag Stopvalve for hydraulic power and safety system
DE10058560A1 (en) * 2000-11-24 2002-06-13 Voith Turbo Kg Electro-hydraulic actuator
DE102016102387A1 (en) 2015-07-31 2017-02-02 Voith Patent Gmbh Hydraulic drive for performing a linear movement
CN111288044B (en) * 2020-02-14 2021-11-30 三一汽车起重机械有限公司 Hydraulic system and engineering machinery
CN113028077B (en) * 2021-02-26 2022-09-16 重庆市江北嘴水源空调有限公司 Valve for taking water from river

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2352334A (en) * 1942-06-09 1944-06-27 Macomber Thomas Wesson Aircraft control system
US2427549A (en) * 1942-08-08 1947-09-16 Weatherhead Co Gyroscopic apparatus
BE517780A (en) * 1952-02-21
US2855900A (en) * 1954-11-02 1958-10-14 British Messier Ltd Fluid pressure servo system with valve actuating means having a differential feel
US3608431A (en) * 1969-07-14 1971-09-28 Lummus Industries Control system for the ram of vertically disposed fluid pressure cylinders
US3604313A (en) * 1970-05-14 1971-09-14 Gen Signal Corp Hydraulic power circuit with rapid lowering provisions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404065A (en) * 2018-10-12 2019-03-01 上海华电电力发展有限公司 Prevent host porthole blocking solenoid valve failure from causing the control method of unit tripping
US11644104B2 (en) 2021-03-18 2023-05-09 Mitsubishi Heavy Industries, Ltd. Steam valve

Also Published As

Publication number Publication date
FR2090187A1 (en) 1972-01-14
FR2090187B1 (en) 1975-07-04
FI57172B (en) 1980-02-29
US3757646A (en) 1973-09-11
FI57172C (en) 1980-06-10
BE767456A (en) 1971-11-22
CA930283A (en) 1973-07-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee