Flow meter having a contoured plug and resilient means
First Claim
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1. A fluid flow meter comprising:
- a conduit;
a constriction provided within the conduit;
a contoured plug situated, at least partly, within the constriction;
an abutment which is supported within the conduit at a position axially spaced from the constriction;
resilient means which extends and acts between the contoured plug and the abutment whereby a pressure difference cross the constriction causes axial displacement of the plug thereby to vary the flow cross-section of the constriction, such axial displacement causing a force to be applied to the abutment by the resilient means; and
measurement means coupled to the abutment, the measurement means being responsive to the force applied to the abutment by the resilient means, the measurement means thereby providing a signal representing the flow rate through the conduit.
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Abstract
A target meter comprises a plug 12 which is movable relatively to an orifice plate 8 against a spring 20. The spring transfers the force on the plug 12 to an abutment 26, 42. The force applied to the support 26, 42 is detected by strain gauges 30, 44 and the signals from the strain gauges are processed to provide a measure of the flow rate or of the pressure drop across the orifice plate 8.
31 Citations
15 Claims
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1. A fluid flow meter comprising:
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a conduit; a constriction provided within the conduit; a contoured plug situated, at least partly, within the constriction; an abutment which is supported within the conduit at a position axially spaced from the constriction; resilient means which extends and acts between the contoured plug and the abutment whereby a pressure difference cross the constriction causes axial displacement of the plug thereby to vary the flow cross-section of the constriction, such axial displacement causing a force to be applied to the abutment by the resilient means; and measurement means coupled to the abutment, the measurement means being responsive to the force applied to the abutment by the resilient means, the measurement means thereby providing a signal representing the flow rate through the conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification