Method for mounting a metal body on the measuring tube of a Coriolis mass flowmeter
AssigneeKrohne AG
InventorsVincent Cook, Lawrence Davies, Neil Harrison, Yousif Hussain, Chris N. Rolph
Life of this patent
Estimating the term…
Abstract
A method for mounting a metal body on an essentially straight measuring tube, made of titanium or zirconium, of a Coriolis mass flowmeter. The method ensures secure retention of the metal body on the measuring tube even through very extended operation of the Coriolis mass flowmeter, in that the metal body is shrink-mounted on the measuring tube.
Claims20
A method for mounting a metal body on an essentially straight measuring tube, consisting of titanium or zirconium, of a Coriolis mass flow meter, comprising steps of
- providing a measuring tube;
- providing a metal jacket having an outer diameter;
- firmly attaching the metal jacket to the measuring tube;
- providing a metal body with a bore having an inner diameter that is slightly smaller than the outer diameter of the metal jacket;
- heat-expanding the bore of the metal body enough to allow it to be pushed onto the metal jacket;
- and
- allowing the metal body to cool off, the cooling-related reduction of the inner diameter of the bore in the metal body producing a tight shrink-fit between the metal body and the metal jacket.
A method for mounting a metal body having a bore on an essentially straight titanium or zirconium Coriolis mass flow meter measuring tube having an axis and a mounting area with a selected outer diameter, said method comprising the steps of:
- providing an inside tapered collet in said bore;
- forming an outside tapered collet having an inner diameter essentially matching the outer diameter of the mounting area;
- engaging the outside tapered collet on the measuring tube at said mounting area, and
- pushing the outside and inside tapered collets together with a pushing force in the direction of said axis so that said tapered collets interfit, the tapers of said collets being dimensionally matched so that said pushing force provides sufficient radial pressure to create a force fit of the metal body on the measuring tube.
A method for mounting a metal body on an essentially straight titanium or zirconium measuring tube of a Coriolis mass flow meter, said method comprising the steps of:
- firmly engaging a metal jacket around the measuring tube;
- pushing a tubular metal body having an inner surface onto the metal jacket;
- pressing the metal body inward directly against the metal jacket, and
- welding the metal body to the metal jacket.
Dependencies are inferred from the claim text.