Diagnostic method, diagnostic device and process valve assembly
AssigneeFesto AG & Co.
InventorsHolger Steltner, Fabian Wiek
Life of this patent
Estimating the term…
Abstract
A diagnostic method for determining a flap impact of a flap fitting of a process valve, including the steps of: recording a temporal deflection course of a flap of the flap fitting, and detecting a flap impact characteristic in the temporal deflection course.
Claims17
A diagnostic method for detecting a butterfly disk impact characteristic of a butterfly valve Swing of a process valve, comprising the steps of:
- recording a temporal angular position course of a butterfly disk of the butterfly valve and detecting a butterfly disk impact characteristic in the temporal angular position course,
- wherein the temporal angular position course comprises a plurality of angular position values, which each represent a respective angular position of the butterfly disk recorded at a respective time,
- further comprising the step of:
- based on the detected butterfly disk impact characteristic, generating a butterfly disk impact information indicating that a butterfly disk impact is present,
- wherein the butterfly disk impact is a movement of fly disk that occurs over predetermined portion of a stroke of the butterfly disk and is performed at at least a predetermined speed, so that the butterfly disk slams against a stop defining an end position of the butterfly disk,
- wherein for detecting the butterfly disk impact characteristic, it is determined whether the butterfly disk has passed through an angular position difference greater than a predetermined angular position difference threshold, and a time period which the valve has taken to pass through the angular position difference greater than the predetermined angular position difference threshold is determined.
A diagnostic device for detecting a butterfly disk impact of a butterfly valve of a process valve, wherein the diagnostic device is configured to record a temporal angular position course of a butterfly disk of the butterfly valve and to detect a butterfly disk impact characteristic in the temporal angular position course, wherein the ter poral angular position course comprises a plurality of angular position values, which each represent a respective angular position of the butterfly disk recorded at a respective time,
- wherein the diagnostic device is configured to generate, based on the detected butterfly disk impact characteristic, butterfly disk impact information indicating that the butterfly disk impact is present wherein the butterfly disk impact is a movement of the butterfly disk that occurs over a predetermined portion of a stroke of the butterfly disk and is performed at at least a predetermined speed, so that the butterfly disk slams against a stop defining an end position of the butterfly disk, wherein the diagnostic device comprises a ring memory and is configured to record the temporal angular position course into the ring memory.
A process valve assembly, comprising a process valve with a butterfly valve and a valve drive for driving the butterfly valve, further comprising a diagnostic device for detecting a butterfly disk impact of the butterfly valve Sitting, wherein the diagnostic device is attached externally to the valve drive, wherein the diagnostic device is configured to record a temporal angular position course of a butterfly disk of the butterfly valve and to detect a butterfly disk impact characteristic in the temporal angular position course, wherein the temporal angular position course comprise plurality of angular position values, which each represent a respective angular position of the butterfly disk recorded at a respective time, wherein the diagnostic device is configured to generate, based on the detected butterfly disk impact characteristic butterfly disk impact information indicating that a butterfly disk impact is present, wherein the butterfly disk impact is a movement of the butterfly disk that occurs over a predetermined portion of a stroke of the butterfly disk and is performed at at least a predetermined speed, so that the butterfly disk slams against a stop defining an end position of the butterfly disk.
Dependencies are inferred from the claim text.