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GB2302189A - Control circuit - Google Patents

Control circuit

Info

Publication number
GB2302189A
GB2302189A GB9622415A GB9622415A GB2302189A GB 2302189 A GB2302189 A GB 2302189A GB 9622415 A GB9622415 A GB 9622415A GB 9622415 A GB9622415 A GB 9622415A GB 2302189 A GB2302189 A GB 2302189A
Authority
GB
United Kingdom
Prior art keywords
control
control line
control circuit
separate
coupling
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
GB9622415A
Other versions
GB9622415D0 (en
GB2302189B (en
Inventor
Ove Bratland
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.)
Hitec AS
Original Assignee
Hitec AS
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 Hitec AS filed Critical Hitec AS
Publication of GB9622415D0 publication Critical patent/GB9622415D0/en
Publication of GB2302189A publication Critical patent/GB2302189A/en
Application granted granted Critical
Publication of GB2302189B publication Critical patent/GB2302189B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Selective Calling Equipment (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

A control circuit for controlling a combined emergency shutdown and process protection (safety) system, especially on board platforms and vessels. There are two separate signal generators which, each by means of a control line (10, 17) of its own, can give release or control signals for operating a control valve (21) for the supply of hydraulic or pneumatic pressure medium for coupling a main valve (23) by means of an actuator (22). In order to, that one of the two control signal circuits should be capable of being operated independently on the operating condition and possible error conditions in the other, the control circuit comprises at least two separate connection branches (11, 18) for coupling to a common control line (12) to the control valve (21). The other of the two separate connection branches (18) includes an activating member (20), such as a relay, for a switch (14) adapted to connect the first connection branch (11) to the outgoing control line (12). An input signal on the first connection branch is coupled as an output signal to the control line (12) when a voltage is forced on the activating member (20).
GB9622415A 1994-07-11 1995-06-26 Control system Expired - Fee Related GB2302189B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO942588A NO180126C (en) 1994-07-11 1994-07-11 Control circuit
PCT/NO1995/000111 WO1996001954A1 (en) 1994-07-11 1995-06-26 Control circuit

Publications (3)

Publication Number Publication Date
GB9622415D0 GB9622415D0 (en) 1997-01-08
GB2302189A true GB2302189A (en) 1997-01-08
GB2302189B GB2302189B (en) 1998-09-16

Family

ID=19897248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9622415A Expired - Fee Related GB2302189B (en) 1994-07-11 1995-06-26 Control system

Country Status (4)

Country Link
AU (1) AU2992095A (en)
GB (1) GB2302189B (en)
NO (1) NO180126C (en)
WO (1) WO1996001954A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588388A (en) * 2012-03-05 2012-07-18 中联重科股份有限公司 Starting protection device and method of hydraulic system and engineering machinery

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10128354B4 (en) * 2001-06-13 2004-11-18 Georg Fischer Rohrverbindungstechnik Gmbh Device for preventing unintentional restart
US11105526B1 (en) 2017-09-29 2021-08-31 Integrated Global Services, Inc. Safety shutdown systems and methods for LNG, crude oil refineries, petrochemical plants, and other facilities

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445603A (en) * 1980-09-12 1984-05-01 Daimler-Benz Aktiengesellschaft Safety circuit for an electronic throttle control of internal combustion engines
GB2262624A (en) * 1991-12-20 1993-06-23 Vickers Systems Ltd Input/output amplifier device entegrally mounted with hydraulic valve.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445603A (en) * 1980-09-12 1984-05-01 Daimler-Benz Aktiengesellschaft Safety circuit for an electronic throttle control of internal combustion engines
GB2262624A (en) * 1991-12-20 1993-06-23 Vickers Systems Ltd Input/output amplifier device entegrally mounted with hydraulic valve.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588388A (en) * 2012-03-05 2012-07-18 中联重科股份有限公司 Starting protection device and method of hydraulic system and engineering machinery
CN102588388B (en) * 2012-03-05 2015-02-18 中联重科股份有限公司 Starting protection device and method of hydraulic system and engineering machinery

Also Published As

Publication number Publication date
GB9622415D0 (en) 1997-01-08
NO942588L (en) 1996-01-12
NO180126C (en) 1997-02-19
NO942588D0 (en) 1994-07-11
WO1996001954A1 (en) 1996-01-25
AU2992095A (en) 1996-02-09
NO180126B (en) 1996-11-11
GB2302189B (en) 1998-09-16

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060626