ATE218677T1 - SAFETY CIRCUIT - Google Patents

SAFETY CIRCUIT

Info

Publication number
ATE218677T1
ATE218677T1 AT97901050T AT97901050T ATE218677T1 AT E218677 T1 ATE218677 T1 AT E218677T1 AT 97901050 T AT97901050 T AT 97901050T AT 97901050 T AT97901050 T AT 97901050T AT E218677 T1 ATE218677 T1 AT E218677T1
Authority
AT
Austria
Prior art keywords
switching circuit
safety
circuit
control
movement
Prior art date
Application number
AT97901050T
Other languages
German (de)
Inventor
Wolfgang Britz
Reiner Hans Hertzig
Original Assignee
Hydac Technology 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 Hydac Technology Gmbh filed Critical Hydac Technology Gmbh
Application granted granted Critical
Publication of ATE218677T1 publication Critical patent/ATE218677T1/en

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
    • F15B20/002—Electrical failure
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanical Operated Clutches (AREA)
  • Cookers (AREA)
  • Control Of Combustion (AREA)
  • Air Bags (AREA)

Abstract

The invention relates to a safety circuit for controlling a hydraulic drive (10) with a drive part (12) movable in at least two different directions of movement and controllable for any movement by a control switching circuit. A safety circuit which ensures the required safety function in an absolutely safe manner, even in the event of a power failure, is obtained in that at least one safety switching circuit is hydraulically combined with the control switching circuit in such a manner that when the latter is switched off the drive part (12) can only be controlled by the respective safety switching circuit. Consequently, the highest-priority operation provided in an emergency, for example in the form of the defined closing or opening of a vapour control valve, is safely executed and the otherwise usual control process is interrupted by the control switching circuit.
AT97901050T 1996-04-06 1997-01-17 SAFETY CIRCUIT ATE218677T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19613848A DE19613848C2 (en) 1996-04-06 1996-04-06 Safety circuit for controlling a hydraulic drive
PCT/EP1997/000189 WO1997038228A1 (en) 1996-04-06 1997-01-17 Safety circuit

Publications (1)

Publication Number Publication Date
ATE218677T1 true ATE218677T1 (en) 2002-06-15

Family

ID=7790686

Family Applications (1)

Application Number Title Priority Date Filing Date
AT97901050T ATE218677T1 (en) 1996-04-06 1997-01-17 SAFETY CIRCUIT

Country Status (8)

Country Link
EP (1) EP0890030B1 (en)
JP (1) JP2000508409A (en)
AT (1) ATE218677T1 (en)
CZ (1) CZ259398A3 (en)
DE (2) DE19613848C2 (en)
DK (1) DK0890030T3 (en)
SK (1) SK136898A3 (en)
WO (1) WO1997038228A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10050542B4 (en) 2000-10-11 2004-11-04 Preh Gmbh Safety circuit against undesired commissioning of an automatic assembly machine, in particular during set-up, and method for switching on the safety circuit
DE10343088B4 (en) * 2003-09-17 2006-04-20 Liebherr-Aerospace Lindenberg Gmbh Method for checking a valve block for a consumer with two hydraulic supply systems
CN118407947B (en) * 2024-05-15 2026-03-03 中联重科股份有限公司 Constant flow control valve bank, auxiliary arm control module, complete machine hydraulic system and crane

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2931533C2 (en) * 1979-08-03 1984-09-13 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Servo control system
JPH063202B2 (en) * 1986-04-27 1994-01-12 三菱重工業株式会社 Failure neutral mechanism of electro-hydraulic servo actuator
DE3631104A1 (en) * 1986-09-12 1988-03-24 Rexroth Mannesmann Gmbh Safety circuit, in particular for a press
DE4131821C1 (en) * 1991-09-20 1992-08-13 Mannesmann Ag, 4000 Duesseldorf, De Pressure medium safety circuit for boiler lid handling - has extra safety valve coupled to valve system for switching in dependence on pressure threshold value
US5577876A (en) * 1994-02-22 1996-11-26 Clark Equipment Company Hydraulic interblock system
JPH08113197A (en) * 1994-10-17 1996-05-07 Kawasaki Heavy Ind Ltd Hydraulic control system switching circuit in steering gear

Also Published As

Publication number Publication date
EP0890030B1 (en) 2002-06-05
JP2000508409A (en) 2000-07-04
SK136898A3 (en) 1999-02-11
DK0890030T3 (en) 2002-09-23
WO1997038228A1 (en) 1997-10-16
DE59707427D1 (en) 2002-07-11
EP0890030A1 (en) 1999-01-13
DE19613848C2 (en) 1998-04-09
DE19613848A1 (en) 1997-10-09
CZ259398A3 (en) 1998-11-11

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Legal Events

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