Safety valve device

Abstract

In a safety valve device (11) with at least one safety valve (13; 13a, 13b) having a movable valve member (30; 30a, 30b) and associated with an actuating device (14; 14a, 14b) by means of which it can be selectively set into a first switching state or into a second switching state, wherein the safety valve module (12) has a plurality of module connections, which are module inlet connections (Me1, Me2) designed for fluidic connection to a control valve (17) controlling the supply and discharge of a working fluid and which can be set into a plurality of different control switching states, module outlet connections (Mal, Ma2) designed for fluidic connection to a double-acting drive (18) and module vent connections (Mr1, Mr2) designed for venting the double-acting drive (18), the actuating device (14; 14a, 14b) of the safety valve (13;13a, 13b) designed such that the first switching state is a closed basic position (normally closed), in which the fluid supply to the double-acting drive (18) is blocked and both working chambers (19a, 19b) of the drive (18) can be vented simultaneously, in which the module output connections (Mal, Ma2) are fluidically connected to the module input connections (Me1, Me2) via module venting channels (Ek1, Ek2) in the safety valve module (12) which are fluidically separated from one another.

Claims

[1] Safety valve device, with a safety valve module (12) having at least one safety valve (13; 13a, 13b), wherein the at least one safety valve (13; 13a, 13b) having a movable valve member (30; 30a, 30b) is assigned an actuating device (14; 14a, 14b) by means of which it can be selectively set into a first switching state or into a second switching state, wherein the safety valve module (12) has a plurality of module connections, which are module inlet connections (Me1, Me2) designed for fluidic connection to a control valve (17) controlling the supply and discharge of a working fluid and which can be set into a plurality of different control switching states, module outlet connections (Mal, Ma2) designed for fluidic connection to a double-acting drive (18) and module outlet connections (Mal, Ma2) designed for venting the double-acting drive (18). Module vent connections (Mr1, Mr2), characterized bythat the actuating device (14; 14a, 14b) of the safety valve (13; 13a, 13b) is designed such that the first switching state is a closed basic position in which the fluid supply to the double-acting drive (18) is blocked and both working chambers (19a, 19b) of the drive (18) are vented simultaneously, in that the module output connections (Mal, Ma2) are fluidically connected to the module vent connections (Mr1, Mr2) via module vent channels (Ek1, Ek2) in the safety valve module (12) which are designed to be fluidically separated from one another. [2] Safety valve device according to claim 1, characterized by that the safety valve (13; 13a, 13b) is of monostable design and has a return spring (15) by which the valve member (30; 30a, 30b) of the safety valve (13; 13a, 13b) is prestressed into the closed basic position. [3] Safety valve device according to claim 1 or 2, characterized bythat a switching state interrogation device (31; 31a, 31b) is assigned to the safety valve (13; 13a, 13b), wherein the switching state interrogation device (31; 31a, 31b) is preferably arranged on the assigned safety valve (13; 13a, 13b) in such a way that it can be detected whether the valve member (30; 30a, 30b) is in the closed basic position or in an open position. [4] Safety valve device according to one of the preceding claims, characterized by that the safety valve module (12) has a single safety valve (13). [5] Safety valve device according to one of claims 1 to 3, characterized by that the safety valve module (12) has several, in particular two safety valves (13a, 13b). [6] Safety valve device according to claim 5, characterized by that the two safety valves (13a, 13b) are connected in series. [7] Safety valve device according to one of the preceding claims, characterized by that the safety valve module (12) has a 6 / 2 valve function and has two module input connections (Me1, Me2), two module output connections (Mal, Ma2) and two module vent connections (Mr1, Mr2). [8] Safety valve device according to claim 7, characterized bythat the safety valve module (12) has a single 6 / 2-way safety valve (13), with two valve inlet connections (Vp1, Vp2), each of which is fluidically connected to one of the two module inlet connections (Me1, Me2), with two valve outlet connections (Va1, Va2), each of which is fluidically connected to one of the two module outlet connections (Mal, Ma2), and with two valve vent connections (Vr1, Vr2), each of which is fluidically connected to one of the two module vent connections (Mr1, Mr2), wherein in the closed basic position of the valve member (13), the two valve inlet connections (Vp1, Vp2) are blocked and the venting is effected by two separately formed valves, each formed between one of the valve outlet connections (Va1, Va2) and an associated valve vent connection (Vr1, Vr2). Ventilation ducts (Ek1, Ek2) can be carried out. [9] Safety valve device according to claim 7, characterized bythat the safety valve module (12) has two 6 / 2-way safety valves (13a, 13b) connected in series, wherein the safety valves (13a, 13b) each have two valve inlet connections (V1p1, V1p2, V2p1, V2p2), which are each fluidically connected to one of the two module inlet connections (Me1, Me2), two valve outlet connections (V1a1, V1a2, V2a1, V2a2), which are each fluidically connected to one of the two module outlet connections (Mal, Ma2), and two valve vent connections (V1r1, V1r2, V2r1, V2r2), which are each fluidically connected to one of the two module vent connections (Mr1, Mr2), wherein in the closed basic position of the valve member (13a, 13b) the Valve inlet connections of the first safety valve (V1p1, V1p2) are coupled to the blocked valve inlet connections (V2p1, V2p2) of the second safety valve (13b) and the venting is effected by two separately formed,between each of the valve outlet connections (V2a1, V2Aa) of the second safety valve (13b) and an associated module vent connection (Mr1, Mr2) formed vent channels (Ek1, Ek2) can be carried out., [10] Safety valve device according to one of the preceding claims, characterized by in that it has a control valve (17) designed as a five-way valve, in particular a 5 / 3-way valve, which has a first working channel (51) connected to the first module input connection (Me1) and a second working channel (52) connected to the second module input connection (Me2) and which further has a feed channel (50) connected to a pressure source (P) providing the working fluid and two vent channels (53) connected to a pressure sink (R). [11] Safety valve device according to one of the preceding claims, characterized bythat the actuating device (14; 14a, 14b) of the at least one safety valve (13; 13a, 13b) is of an electrically actuated type. [12] Safety valve device according to claim 11, characterized by that the actuating device (14; 14a, 14b) is designed as an electrically actuated pilot valve device (29; 29a, 29b). [13] Safety valve device according to one of the preceding claims, characterized by in that the at least one safety valve (13; 13a, 13b) is designed as a slide valve, with a slide-like valve member (30; 30a, 30b) which has a control structure which has a plurality of control sections (36) arranged one behind the other in the longitudinal direction of the valve member (30; 30a, 30b), to which annular seals (37) are assigned, wherein overflow sections (38) of smaller diameter are formed between adjacent control sections (36). [14] Safety valve device according to claim 13, characterized by that the seals (37) are components of a housing-side, stationary sealing structure, wherein a sealing effect preventing fluid overflow is present wherever the control sections (36) are retracted into associated seals (37). [15] Safety valve device according to one of the preceding claims, characterized by that the axial distance between two adjacent seals (37) is greater than the axial longitudinal extent of the associated control section (36). [16] Safety valve device according to one of the preceding claims, characterized by that the safety valve module (12) has a module housing (16) on which the module input connections (Me1, Me2), the module output connections (Mal, Ma2) and the module vent connections (Mr1, Mr2) are formed. [17] Safety valve device according to claim 16, characterized byin that the module housing (16) has a plurality of, in particular two, valve housing sections (24a, 24b), each having a housing upper side (25), a housing lower side (27), two housing longitudinal sides (26) aligned in particular parallel to one another and two housing end sides (28) facing away from one another, wherein the valve housing sections (24a, 24b) are placed against one another with two mutually facing housing longitudinal sides (26), which together form an intermediate wall in which a plurality of through openings (45) are formed, via which working fluid can flow.

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