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US 10,794,787 B2Granted
Diaphragm seal assembly with evacuated double diaphragm and vacuum monitoring
AssigneeWIKA Alexander Wiegand SE & Co. KG
InventorsJoachim Zipp, Udo Rosenberger, Torsten Pauling, Heiko Kern, Albrecht Kalisch, Udo Hoerning
Life of this patent
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Abstract
A diaphragm seal assembly, which includes a measuring instrument, a pressure being transmitted from a process side to be monitored, via an arrangement of two diaphragms having an evacuated intermediate space disposed therebetween, to the measuring instrument, reliably separated from the process side, the fatigue strength of the diaphragm seal assembly under extreme application conditions being improved.
Claims20
A diaphragm seal assembly comprising:
- a base body that includes at least one first diaphragm and a second diaphragm, the first diaphragm facing a process medium to be monitored, the second diaphragm facing a fluid-filled pressure path;
- a first measuring instrument for monitoring a pressure of the process medium;
- a second measuring instrument;
- an intermediate space formed between the first diaphragm and the second diaphragm, the intermediate space being evacuated, the second measuring instrument monitoring a vacuum present in the intermediate space;
- and
- a circular ring channel arranged around an outer edge of the second diaphragm and within an outer edge of the first diaphragm,
- wherein a recess is provided in the base body including at least two recess steps in the base body, which are spaced apart by a predetermined minimum distance and are used to arrange the first diaphragm and the second diaphragm, and wherein the outer edge of the first diaphragm is disposed on one recess step, and the outer edge of the second diaphragm is disposed on another recess step, and
- wherein the circular ring channel is fluid-connected to the second measuring instrument, is provided in the another recess step of the second diaphragm and is situated laterally outside the outer edge of the second diaphragm, the circular ring channel being formed to run around the second diaphragm in a semicircle, and the circular ring channel having a width of 0.3 mm to 3 mm and a depth of 0.2 mm to 1.5 mm.
5 more elements
A diaphragm seal assembly comprising:
- a base body that includes at least one first diaphragm and a second diaphragm, the first diaphragm facing a process medium to be monitored, the second diaphragm facing a fluid-filled pressure path;
- a first measuring instrument for monitoring a pressure of the process medium;
- a second measuring instrument;
- an intermediate space formed between the first diaphragm and the second diaphragm, the intermediate space being evacuated, the second measuring instrument monitoring a vacuum present in the intermediate space;
- and
- a circular ring channel arranged around an outer edge of the second diaphragm and within an outer edge of the first diaphragm,
- wherein the first diaphragm and the second diaphragm are pipe diaphragms, and the first diaphragm is disposed within the second diaphragm, the outer edge of the first diaphragm representing an outer circumference thereof, and the outer edge of the second diaphragm representing an outer circumference thereof, and the outer circumference of the first diaphragm and the outer circumference of the second diaphragm are spaced apart by a predetermined minimum distance.
4 more elements
A diaphragm seal assembly comprising:
- a base body that includes at least one first diaphragm and a second diaphragm, the first diaphragm facing a process medium to be monitored, the second diaphragm facing a fluid-filled pressure path;
- a first measuring instrument for monitoring a pressure of the process medium;
- a second measuring instrument;
- an intermediate space formed between the first diaphragm and the second diaphragm, the intermediate space being evacuated, the second measuring instrument monitoring a vacuum present in the intermediate space;
- and
- a circular ring channel arranged around an outer edge of the second diaphragm and within an outer edge of the first diaphragm,
- wherein the second measuring instrument and the intermediate space between the first diaphragm and the second diaphragm are fluid-connected by a vacuum channel, and an evacuation connection is connected gas-tight to the vacuum channel, the evacuation connection being sealed doubly gas-tight by a first direct welding of the evacuation connection or by a plug placed at the evacuation connection, and by a second welding of a cap.
4 more elements
Dependencies are inferred from the claim text.