Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1996-06-28
1998-01-13
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137559, 251282, 251285, F16K 3700
Patent
active
057068550
ABSTRACT:
In a device for monitoring the valve stroke of a valve that is pneumatically or hydraulically driven and comprises a valve body that is actuated by means of a pressure spindle (16), in particular, a diaphragm valve, a control spindle (20) is effectively connected to the pressure spindle (16). A control element (38) is arranged on the control spindle (20) in order to actuate a measuring element that serves as a signal transmitter for the valve position. The control element (38) has a control surface (40) that is inclined relative to the actuating axis (z) of the control spindle (20), and a displacement transducer (36) that measures the respective distance from the control surface (40) which corresponds to the valve position is arranged on the valve.
This device makes it possible to monitor continuously the valve stroke over the entire range of movement of the valve.
In order to automatically position the control element (38) during the initial actuation of the valve, a limit stop (24) that acts as a driver is arranged underneath the control element (38), with the control element (38) being clamped on the control spindle (20) so that it can be displaced.
REFERENCES:
patent: 3367365 (1968-02-01), Stevens
patent: 3719203 (1973-03-01), Wettre
patent: 4198030 (1980-04-01), Jackson et al.
Chambers A. Michael
Georg Fischer Rohrleitungssysteme AG
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