Pneumatic control device and process control device equipped therewith
AssigneeFesto AG & Co.
InventorsBodo Neef, Christoph Maile
Life of this patent
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Abstract
A pneumatic control device includes a functional assembly that has an interruption valve device for the selective opening or interruption of at least one main working channel used for the pneumatic control of a pneumatic actuator. The functional assembly also contains a manually actuatable valve device that is connected to the interruption valve device by means of at least one auxiliary working channel and which enables manual pneumatic control of the connected actuator, if the at least one main working channel is interrupted by the interruption valve device at the same time. A process control device can also be equipped with a control device of this type.
Claims22
A pneumatic control device with a functional assembly having an interruption valve device for the selective opening in an open position or interruption in an interruption position of at least one main working channel used for the pneumatic control of a connected pneumatic actuator, wherein the functional assembly has a manually actuatable valve device connected to the interruption valve device by means of at least one auxiliary working channel, wherein the connected pneumatic actuator can be pneumatically controlled via the at least one auxiliary working channel by means of the manually actuatable valve device only when the at least one main working channel is interrupted by the interruption valve device,
- wherein air can be supplied to or removed from the at least one auxiliary working channel by actuation of the manually actuatable valve device when the interruption valve device is in the interruption position to pneumatically control the pneumatic actuator, and
- wherein the functional assembly further comprises a first actuating means separate from the manually actuatable valve device, the first actuating means being functionally connected to the interruption valve device for switching the interruption valve device to either the open position or the interruption position independent of the manually actuatable valve device, and without using the air which is supplied to or removed from the at least one auxiliary working channel via the manually actuatable valve device.
A process control device with a pneumatic actuator and with a pneumatic control device for the pneumatic actuator, wherein the pneumatic control device is mounted on the pneumatic actuator and wherein the pneumatic control device has a functional assembly having an interruption valve device for the selective opening in an open position or interruption in an interruption position of at least one main working channel used for the pneumatic control of the pneumatic actuator, wherein the functional assembly has a manually actuatable valve device connected to the interruption valve device by means of at least one auxiliary working channel, wherein the pneumatic actuator can be pneumatically controlled via the at least one auxiliary working channel by means of the manually actuatable valve device only when the at least one main working channel is interrupted by the interruption valve device,
- wherein air can be supplied to or removed from the at least one auxiliary working channel by actuation of the manually actuatable valve device when the interruption valve device is in the interruption position to pneumatically control the pneumatic actuator, and
- wherein the functional assembly further comprises a first actuating means separate from the manually actuatable valve device, the first actuating means being functionally connected to the interruption valve device for switching the interruption valve device to either the open position or the interruption position independent of the manually actuatable valve device, and without using the air which is supplied to or removed from the at least one auxiliary working channel via the manually actuatable valve device.
Dependencies are inferred from the claim text.