Piston test instrument for calibration and/or gauging of a flow meter and/or for determining a flow rate of a measured medium
AssigneeL'atelier De Matourne, S.A.S
InventorVincent Mickael Anthony Leveque
Life of this patent
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Abstract
A piston test instrument for calibration and/or gauging of a flow meter and/or for determining a flow rate, wherein the piston test instrument has a tubular housing having an inlet, via which a measured medium is introducible into the housing, and having an outlet, via which the measured medium is dischargeable from the housing, wherein the piston test instrument has a piston arranged in the housing, wherein the piston test instrument has a drive device, which is designed for moving the piston by way of contactless, magnetic force transmission by a drive device.
Claims13
A piston test instrument (1) for calibration and/or gauging of a flow meter and/or for determining a flow rate, wherein the piston test instrument (1) has a tubular housing (20) having an inlet (21), via which a measured medium (M) is introducible into the housing (20), and having an outlet (22), via which the measured medium (M) is dischargeable from the housing (20),
- wherein the piston test instrument (1) has a piston (3) arranged in the housing (20), wherein the piston test instrument (1) has a drive device (10), wherein the piston (3) is movable by a contactless, magnetic force transmission of the drive device (10);
- wherein the drive device (10) is arranged outside the housing (20) of the piston test instrument (1) wherein the piston (3) has at least one first magnet (102) and wherein the drive device (10) has at least one second magnet (101) and wherein the magnets (101, 102) are aligned in relation to one another such that the piston (3) is movable in a position (X) by the movement of the second magnet (101) of the drive device (10) inside the housing (20).
A method for measuring a flow rate of a measured medium (M), in particular a flow rate of a cryogenic measured medium (M), by way of a piston test instrument (1),
- wherein the piston test instrument (1) has a tubular housing (20) having an inlet (21) and having an outlet (22), a piston (3) arranged in the housing (20), and a drive device (10) arranged outside of the housing (20),
- wherein the method comprises the following steps:
- a) feeding the measured medium (M) into the inlet (21) of the housing (20) of the piston test instrument (1);
- b) executing a flow rate measurement by moving the piston (3) from a starting position (Y) in the region of the inlet (21) into an end position (X) in the region of the outlet (22);
- c) returning the piston (3) into the starting position (Y) by moving the piston (3) by way of the drive device (10),
- wherein the moving of the piston (3) in step c) is performed by a contactless, magnetic force transmission between the drive device (10) and the piston (3).
Dependencies are inferred from the claim text.