Patent ID: 6904810
Filing Date: 2005-06-14
Classification: G01F

Abstract:
1. A purge type vortex flowmeter for measuring fluid in a flow pipe comprising: a vortex generator mounted in the flow pipe, said vortex generator having two side surfaces and a front surface; two side conduits, each having an outlet opened to a respective side surface of the vortex generator, and each side conduit being adapted for communicating with fluid flowing in the flow pipe; a front conduit having an outlet opened to the front surface of the vortex generator, and being adapted for communicating with fluid flowing in the flow pipe; and a purge injecting means for supplying a constant flow of purge fluid from a purge supply source into the two side conduits and the front conduit and discharging purge streams through the outlets of the two side conduits and through the outlet of the front conduit into a stream of fluid flowing in the flow pipe; the system being adapted for detecting each vortex generated by the vortex generator as a signal of fluctuation of a flow rate or flow velocity of purge fluid flowing in the side conduits in response to fluctuating pressure of the vortex.