US 7,448,281 B2
Magnetic induction flowmeter having a metal measuring tube
Ralf Bäcker, Bovenden (Germany); and Franz Krope, Kerpen-Sindorf (Germany)
Assigned to ABB AG, Mannheim (Germany)
Filed on Feb. 22, 2007, as Appl. No. 11/709,251.
Claims priority of application No. 10 2006 008 451 (DE), filed on Feb. 23, 2006.
Prior Publication US 2007/0193366 A1, Aug. 23, 2007
Int. Cl. G01F 1/58 (2006.01)
U.S. Cl. 73—861.12 18 Claims
OG exemplary drawing
 
1. A magnetic induction flowmeter having a metal measuring tube (1), which can be inserted into a pipeline system via flanged sections (2a, 2b) at the ends, having at least two mutually opposite measuring electrodes (5a, 5b) introduced into the wall of the measuring tube (1) in an electrically insulated manner in order to register a measuring voltage, a magnetic unit (4), likewise arranged on the outside of the measuring tube (1), generating a magnetic field aligned substantially at right angles to the flow direction of the conductive flow medium to be measured, and the measuring tube (1) being provided with an electrically insulating layer (6) on the inside,
wherein, in the region of the flanged sections (2a, 2b) at the end of the measuring tube (1), an expanded lattice (7) is fixed to the measuring tube (1), to which lattice the insulating layer (6) is applied in such a way that the expanded lattice (7) located within the insulating layer (6) ensures a firm connection between insulating layer (6) and measuring tube (1).