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US 4,065,965 AGranted
Electromagnetic flowmeter having removable electrode leads
AssigneeSybron Corporation
InventorsThomas Liddon Ackerman, Mathew Martin Barbato, Eugene Vidmantas
Life of this patent
Estimating the term…
Abstract
An electromagnetic flowmeter having a flow tube wherein the electrodes leads pass through potting material forming part of the lining of the flow tube. The leads emerge at the exterior of the flow tube at three points, two of which substantially are at the electrodes, and one of which is between the two electrodes, via conduits embedded in the potting material and exiting from the flow tube at said points. The leads are accessible for repair or replacement.
Claims17
An electromagnetic flowmeter having a flow tube, spaced electrodes, and electrode lead means in said flow tube:
- said flowmeter also having bore means in said flow tube for having liquid flow therethrough, magnetic field coil means, and measuring circuitry external to said flow tube, said measuring circuitry being connected by said lead means to said electrodes for measuring voltages arising at said electrodes in response to a flow of conductive liquid through said bore means and between said electrodes while said magnetic field coil means creates a magnetic field in said flow, transverse thereto, and between said electrodes;
- said flowmeter also having the improvement including conduit means in said flow tube, said conduit means having said electrode lead means removably contained therein;
- and said conduit means exiting from the flow tube to the exterior thereof for providing access to said electrode lead means from the exterior of said flow tube for removing said electrode lead means from said flow tube;
- there being potting material encapsulating said magnetic field coil means and said conduit means, said electrode lead means being kept by said conduit means from being contacted by said potting material, and there being electrode housings in said flow tube, said electrode housings housing and providing external access to said electrodes, and keeping said electrodes from contacting said potting material;
- said electrode housings also having connections to said conduit means and having said electrode lead means extending through such connections and thereinto.
2 more elements
An electromagnetic flowmeter having a flow tube, spaced electrodes, and electrode lead means in said flow tube;
- said flowmeter also having bore means in said flow tube for having liquid flow therethrough, magnetic field coil means, and measuring circuitry external to said flow tube, said measuring circuitry being connected by said lead means to said electrodes for measuring voltages arising at said electrodes in response to a flow of conductive liquid through said bore means and between said electrodes while said magnetic field coil means creates a magnetic field in said flow, transverse thereto, and between said electrodes;
- said flowmeter also having the improvement including conduit means in said flow tube, said conduit means having said electrode lead means removably contained therein and said conduit means exiting from the flow tube to the exterior thereof for providing access to said electrode lead means from the exterior of said flow tube for removing said electrode lead means from said flow tube;
- said conduit means being between said bore means and said flow tube, and exiting from said flow tube at each said electrode, and at a point on said flow tube between said electrodes.
An electromagnetic flowmeter having a flow tube, spaced electrodes, and electrode lead means in said flow tube;
- said flowmeter also having bore means in said flow tube for having liquid flow therethrough, magnetic field coil means, and measuring circuitry external to said flow tube, said measuring circuitry being connected by said lead means to said electrodes for measuring voltages arising at said electrodes in response to a flow of conductive liquid through said bore means and between said electrodes while said magnetic field coil means creates a magnetic field in said flow, transverse thereto, and between said electrodes;
- said flowmeter also having the improvement including conduit means in said flow tube, said conduit means having said electrode lead means removably contained therein;
- said conduit means exiting from the flowtube to the exterior thereof for providing access to said electrode lead means from the exterior of said flow tube for removing said electrode lead means from said flow tube;
- said conduit means including a first conduit between said bore means and said flow tube, and exiting from said flow tube at one end of said first conduit and at one said electrode, and a second conduit between said bore means and said flow tube, and exiting at one end thereof from said flow tube and at the other said electrode, and the other end of each said conduit exiting from said flow tube at a point between said electrodes.
1 more element
An electromagnetic flowmeter having a flow tube, spaced electrodes, and electrode lead means in said flow tube;
- said flowmeter also having bore means in said flow tube for having liquid flow therethrough, magnetic field coil means, and measuring circuitry external to said flow tube, said measuring circuitry being connected by said lead means to said electrodes for measuring voltages arising at said electrodes in response to a flow of conductive liquid through said bore means and between said electrodes while said magnetic field coil means creates a magnetic field in said flow, transverse thereto, and between said electrodes;
- said flowmeter also having the improvement including conduit means in said flow tube, said conduit means having said electrode lead means removably contained therein;
- and said conduit means exiting from the flow tube to the exterior thereof for providing access to said electrode lead means from the exterior of said flow tube for removing said electrode lead means from said flow tube;
- each said electrode being part of an electrode assembly sealingly and removably mounting said electrode in the wall of said bore means, with one end of such electrode exposed inside said bore means;
- said lead means including lead wires and the other end of each said electrode being external to said flow tube and having one of said lead wires connected to it, with such lead wire coming off such connection and going into said conduit means;
- said conduit means being smoothly curved conduits each connected at one end to a said electrode assembly and having non-damaging interior surfaces, the other ends of said conduits being connected to a feedthrough located at a point on said flow tube between said electrodes.
3 more elements
An electromagnetic flowmeter having a flow tube, spaced electrodes, and electrode lead means in said flow tube;
- said flowmeter also having bore means in said flow tube for having liquid flow therethrough, magnetic field coil means, and measuring circuitry external to said flow tube, said measuring circuitry being connected by said lead means to said electrodes for measuring voltages arising at said electrodes in response to a flow of conductive liquid through said bore means and between said electrodes while said magnetic field coil means create a magnetic field in said flow, transverse thereto, and between said electrodes;
- said flowmeter also having the improvement including conduit means associated with said flow tube, said conduit means providing access to said electrode lead means and from the exterior of said flow tube, said conduit means having said electrode lead means removably contained therein, and said conduit means being between said bore means and said flow tube, and exiting from said flow tube at each said electrode, and a point on said flow tube between said electrodes.
Dependencies are inferred from the claim text.