초록 ▼

In an actuating drive or method for capturing a position of a final control element to be positioned by a drive member of the actuating drive, the final control element is pushed from an initial position to a target position by a spring body acting on the drive member. A first reference position is

In an actuating drive or method for capturing a position of a final control element to be positioned by a drive member of the actuating drive, the final control element is pushed from an initial position to a target position by a spring body acting on the drive member. A first reference position is spatially configured in a vicinity of or at the spring body. A second reference position moving relative to the first reference position during positioning movement of the drive member is spatially configured adjacent a first outer surface of the spring body. A distance between the first reference position and the second reference position is captured.

대표청구항 ▼

1. An actuating drive for positioning a final control element, comprising: a drive member actuating the final control element;a spring body with a predetermined modulus of elasticity for pushing the drive member;the final control element being pushed via the drive member by elastic return forces of

1. An actuating drive for positioning a final control element, comprising: a drive member actuating the final control element;a spring body with a predetermined modulus of elasticity for pushing the drive member;the final control element being pushed via the drive member by elastic return forces of the spring body from an initial position to a target position;a capturing device for capturing a position of the final control element;the capturing device comprising a sensor for determining a distance between a first spatially determined reference position in a vicinity of or at the spring body and a second spatially determined reference position adjacent an outer surface of the spring body, the second reference position moving relative to the first reference position during a positioning movement of the drive member; anda fluid-tight housing containing said spring body and wherein the first reference position is at a position different from a location of the second reference position adjacent said outer surface of the spring body. 2. The actuating drive of claim 1 wherein the control element comprises a valve member for a technical processing plant. 3. The actuating drive of claim 1 wherein said target position comprises a safety position. 4. The actuating drive according to claim 1 wherein the first and the second reference positions are disposed within a housing of the actuating drive, the housing having a pneumatic or hydraulic working chamber and a return chamber in which the spring body is substantially entirely lodged, the first and the second reference positions being disposed within the return chamber, and the return chamber being exposed to a working fluid. 5. The actuating drive according to claim 1 wherein the first reference position is configured in stationary fashion relative to the fluid-tight housing at an inside of the fluid-tight housing. 6. The actuating drive according to claim 1 wherein the first reference position is configured in stationary fashion relative to the fluid-tight housing at an outside of a functional component fixed at an inside of the fluid-tight housing. 7. The actuating drive according to claim 1 wherein the spring body comprises a helical compression spring, the second reference position is disposed in stationary fashion relative to and adjacent said outer surface of the helical spring at a first winding, the first reference position being adjacent said outer surface of the same helical spring at a second winding adjacent to the first winding. 8. The actuating drive according to claim 1 wherein the position capturing device comprising said sensor is coupled to a positioner in a signal-transmitting manner via a signal line, the positioner being disposed inside said fluid-tight housing in a return chamber thereof, or at an outside of the fluid-tight housing. 9. The actuating drive according to claim 1 wherein the sensor is designed as a position sensor and is fixed to the first or the second reference position via a connecting arm coupled to the first or the second reference position, the position sensor capturing a position of the second or the first reference position, respectively. 10. The actuating drive according to claim 1 wherein the sensor of the position capturing device comprises a HALL-sensor or an AMR-sensor, and a component for generating a magnetic field comprising a permanent magnet is disposed in stationary fashion at and with respect to the second or the first reference position, respectively, via a separate holding device. 11. The actuating drive according to claim 1 wherein a modulus of elasticity of the spring body defines a predetermined, constant proportionality range within which the spring body is deformed for generating and releasing a return force. 12. A method for capturing a position of a final control element to be positioned by an actuating drive, a drive member of the actuating drive actuating the final control element, comprising the steps of: pushing by a spring body the final control element with the drive member from an initial position to a target position;spatially determining a first reference position in a vicinity of or at the spring body;spatially determining a second reference position adjacent an outer surface of the spring body moving relative to the first reference position during a positioning movement of the drive member, a fluid-tight housing containing said spring body and wherein the first reference position is at a position different from a location of the second reference position adjacent said outer surface of the spring body; andcapturing a distance between the first reference position and the second reference position. 13. The method of claim 12 wherein the final control element comprises a valve member for a technical processing plant. 14. The method of claim 12 wherein said target position comprises a safety position. 15. The method of claim 12 wherein the first and the second reference positions are disposed within said fluid-tight housing, the fluid-tight housing having a pneumatic or hydraulic working chamber and a return chamber in which the spring body is substantially entirely lodged, the first and the second reference positions being disposed within the return chamber, and the return chamber being exposed to a working fluid. 16. The method of claim 12 wherein the first reference position is configured in stationary fashion relative to the fluid-tight housing at an inside of the fluid-tight housing. 17. The method of claim 12 wherein the first reference position is configured in stationary fashion relative to the fluid-tight housing at an outside of a functional component fixed at an inside of the fluid-tight housing. 18. The method of claim 12 wherein the spring body comprises a helical compression spring, the second reference position is disposed in stationary fashion relative to and adjacent said outer surface of the helical spring at a first winding, the first reference position being adjacent said outer surface of the same helical spring at a second winding adjacent to the first winding. 19. The method of claim 12 wherein the position capturing device comprises a sensor coupled to a positioner in signal-transmitting manner via a signal line, the positioner being disposed inside the fluid-tight housing in a return chamber thereof, or at an outside of the fluid-tight housing. 20. The method of claim 12 wherein the position capturing device comprises a sensor designed as a position sensor and fixed to the first or the second reference position via a connecting arm coupled to the first or the second reference position, the position sensor capturing a position of the second or the first reference position, respectively. 21. The method of claim 12 wherein the position capturing device comprises a sensor comprising a HALL-sensor or an AMR-sensor, and a component for generating a magnetic field comprising a permanent magnet is disposed in stationary fashion at and with respect to the second or the first reference position, respectively, via a separate holding device. 22. The method of claim 12 wherein a modulus of elasticity of the spring body defines a predetermined, constant proportionality range within which the spring body is deformed for generating and releasing a return force. 23. A valve assembly, comprising: a valve for a technical processing plant comprising a processing fluid passage, a valve seat, and a valve member cooperating with the valve seat;an actuating drive comprising a drive member for actuating the valve member, and a spring body for pushing the drive member, said spring body having an outer surface;the valve member being pushed via the drive member by elastic return forces of the spring body from an initial position to a target position;a capturing device for determining a position of the valve member;the capturing device comprising a sensor for determining a distance between a first reference position associated with a first winding of the spring body and a second reference position associated with a second winding of the spring body, the first reference position moving relative to the second reference position during a positioning movement of the drive member; anda fluid-tight housing containing said spring body and wherein the first reference position is at a position different from a location of the second reference position adjacent said outer surface of the spring body. 24. A method for capturing a position of a valve member of a valve for a technical processing plant, said valve having a processing fluid passage, a valve seat, and a valve member cooperating with the valve seat, wherein a drive member of an actuating drive actuates the valve member, and wherein a spring body pushes the drive member, said spring body having an outer surface, the valve member being pushed via the drive member by elastic return forces of the spring body from an initial position to a target position, comprising the steps of: providing a capturing device for determining a position of the valve member, the capturing device comprising a sensor, a fluid-tight housing containing said spring body and wherein the first reference position is at a position different from a location of the second reference position adjacent said outer surface of the spring body; andutilizing the sensor, determining a distance between a first reference position associated with a first winding of the spring body and a second reference position associated with a second winding of the spring body, the first reference position moving relative to the second reference position during a positioning movement of the drive member.