Patent ID: 6807868
Filing Date: 2004-10-26
Classification: G01F

Abstract:
A Coriolis mass flow meter, comprising:two parallel flow tubes curved into an arch shape having joint ends, each of the joint ends having an end direction; an entry-side manifold with curved branches connected to one set of said joint ends of said two flow tubes, said branches each carrying a portion of a fluid being measured from an inlet port into said two flow tubes, said entry-side manifold being a separate structure than said two parallel flow tubes; an exit-side manifold with curved branches connected to another set of said joint ends of said two flow tubes, said exit-side manifold with curved branches converging flows of said fluid being measured flowing in said two flow tubes into an outlet port to discharge said fluid being measured, said exit-side manifold being a separate structure than said two parallel flow tubes; a drive unit for driving and resonating one of said flow tubes with another of said flow tubes at mutually opposite phases; and a pair of oscillation sensors installed along said two parallel flow tubes curved into an arch shape at locations horizontally symmetrical with respect to an installation location of said drive unit for sensing a phase difference proportional to a Coriolis force, said two flow tubes being connected to said entry-side manifold and to said exit-side manifold at respective said joint ends and said two flow tubes being formed into the arch shape that is bent in only one direction, said entry-side manifold curved branches being smoothly bent from an inlet direction of said entry-side manifold to a connection direction at an end of said two manifold outlets that is the same as the end direction of said joint ends, said exit-side manifold curved branches being smoothly bent from an outlet direction of said exit-side manifold to a connection direction at an end of said two manifold inlets that is the same as the end direction of said joint ends.