EP 0641919 B1 19970604 - Safety valve arrangement
Title (en)
Safety valve arrangement
Title (de)
Hydraulische Sicherheitsschaltung
Title (fr)
Arrangement des clapets de sécurité
Publication
Application
Priority
DE 4330038 A 19930906
Abstract (en)
[origin: EP0641919A1] In a hydraulic safety valve arrangement for a hydraulically controlled and/or regulated machine or plant, especially for the purpose of rapid shut-down of a gas or steam turbine, in which safety valve arrangement (1) a plurality of hydraulic valves (15a, b; 16a, b), electrically actuated by means of a solenoid (18a, b; 19a, b) and closed in the energised condition of the solenoid, are arranged between a pressure line (8) and a pressure relief line (17) in such a way that on the one hand a through connection between the pressure line (8) and the pressure relief line (17) can be established in the event of a scheduled cut-out of one or more valves and so that, on the other hand, in the event of some of the valves failing, the function of the remaining valves can be assumed, an improved reliability is achieved in that there are at least four hydraulic valves (15a, b; 16a, b) which in twos (15a, b and 16a, b) are respectively connected in parallel in a valve-pair, and that the valve-pairs (15a, b; 16a, b) connected in parallel are connected in series between the pressure line (8) and the pressure relief line (17). <IMAGE>
IPC 1-7
IPC 8 full level
F01D 17/26 (2006.01); F01D 21/00 (2006.01); F01D 21/18 (2006.01); F01D 21/20 (2006.01); F15B 20/00 (2006.01)
CPC (source: EP)
F01D 21/18 (2013.01); F01D 21/20 (2013.01); F15B 20/001 (2013.01)
Designated contracting state (EPC)
CH DE GB LI NL
DOCDB simple family (publication)
EP 0641919 A1 19950308; EP 0641919 B1 19970604; DE 4330038 A1 19950309; DE 59402992 D1 19970710; JP 3592377 B2 20041124; JP H0797902 A 19950411
DOCDB simple family (application)
EP 94112814 A 19940817; DE 4330038 A 19930906; DE 59402992 T 19940817; JP 21152894 A 19940905