| 摘要 |
A fluid-operated actuating drive (1) on a valve, in particular a shut-off, safety or regulating valve, comprising a base unit (2) having control valves, two linear actuators (6, 7) which are located opposite of each other and can be actuated fluidically, and a mechanical converter (5) which is arranged between the two linear actuators and couples the gates thereof to each other, wherein the outlet of the converter is coupled to the inlet of the valve. To this end, the actuating drive is composed in a modular manner of individual components joined to form a functional unit in the form of the base unit, the two linear actuators and the mechanical converter. |
| 主权项 |
1. A fluid-operated valve actuating drive, especially a shutoff, safety or regulating valve actuating drive, comprising:
a base unit provided with control valves, two linear actuators disposed opposite one another and capable of being fluidically actuated via the control valves, a mechanical converter, which is disposed between the two linear actuators, which couples the actuators slides with one another and an output of which is configured for coupling with a target valve external to the valve actuating drive, and an electrically driven pressurized-fluid supply unit integrated in the base unit, wherein the valve actuating drive uses hydraulic fluid as the working fluid, is provided with a port for an external hydraulic accumulator and is constructed as a closed fluidic drive system provided with one electrical input and one mechanical take-off means acting on the input of the target valve, wherein the valve actuating drive is constructed modularly from individual components in the form of the base unit, joined together as a functional unit, of the two linear actuators and of the mechanical converter, and all fluid communications between the base unit and the linear actuators and if necessary the mechanical converter are routed inside the individual components, so that no kind of exposed fluid lines exist, and further comprising a self-aspirating filling device comprising a filling port, which is suitable for the first filling of the fluid system with hydraulic fluid from a cartridge; wherein at least one mechanical energy-storing spring is integrated in at least one of the two linear actuators or at least one subassembly comprising one of the two linear actuators; and the mechanical converter does not apply force in the direction of motion of the two linear actuators.
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