(73) Assignee: ROSEMOUNT INC., Chanhassen, MN 73,861.11 …

1 USOO9316514B2. (12) United States Patent (10) Patent No.: US 9,316,514 B2. Smith et al. (45) Date of Patent: Apr. 19, 2016. (54) HIGH PRESSURE WAFER STYLE 2005/0183514 A1* 8/2005 Huybrechts .. GO1F 15,006. magnetic FLOWMETER T3/861-12. 2005/0193833 A1* 9/2005 Huybrechts .. GO1F 1,588. T3/861-12. (71) Applicant: ROSEMOUNT Inc., Chanhassen, MN (US) 2008/0022781 A1* 1/2008 Huybrechts .. GO1F 1/58. T3/861-12. (72) Inventors: Joseph Alan Smith, Minneapolis, MN 2009,0188327 A1 7/2009 Shanahan et al. (US); Steven Bruce Rogers, 2010 A1* 1 1/2010 Magliocca .. GO1F 1,588. Minnetonka, MN (US); Jesse 73, Christopher Pettit, Mi lis, MN 2013/0305838 A1* 11/2013 Mikolichek .. GO1F 1/58. ristopner retut, Minneapolis, T3 (US); Nelson Mauricio Morales, 2014/0083199 A1* 3/2014 Rogers .. GO1F 1,584. Lakeville, MN (US) T3/861-12. 2014/0090483 A1* 4/2014 Smith .. GO1F 1,588. (73) Assignee: ROSEMOUNT INC., Chanhassen, MN 73, US.

2 (US) FOREIGN PATENT DOCUMENTS. N ", 154(b) by 106 days. wo wo 201302. A 2013. OTHER PUBLICATIONS. ROSEMOUNT 8700 series magnetic Flowmeter Sensors'. Quick (21) Appl. No.: 14/226,327 Installation Guide, Jan. 2013, ROSEMOUNT , Emerson Process Man 1-1. agement, 42 pages. (22) Filed: Mar. 26, 2014 International Search Report and Written Opinion for International O O Application No. PCT/US2015/021763, date of mailing: Jun. 29, (65) Prior Publication Data 2015, date offiling: Mar. 20, 2015, 14 pages. US 2015/0276444 A1 Oct. 1, 2015. * cited by examiner (51) Int. Cl. Primary Examiner Harshad R Patel GOIF I/58 ( ) (74) Attorney, Agent, or Firm Christopher R. (52) Cl. Christenson; Kelly, Holt & Christenson, PLLC. CPC G0IF I/584 ( ); G0IF I/58 ( );. GOIF 1/586 ( ) (57) ABSTRACT. (58) Field of Classification Search A wafer-type electromagnetic flow sensor includes a single None piece chassis having a pair of faces and a flow conduit extend See application file for complete search history.

3 Ing between the pair of faces. Each face of the chasses includes a feature configured to engage a metal sealing ring. (56) References Cited A non-conductive liner is disposed in the flow conduit of the single-piece chassis. A plurality of electromagnetic coils is PATENT DOCUMENTS configured to generate a flux into process fluid flowing 4,065,965 A 1/1978 Ackerman et al. through the flow conduit. A pair of electrodes is configured to 4,722,231 A 2, 1988 Tanaka .. GO1F 1/58 electrically couple to the process fluid. A feedthrough assem T3, bly is configured to maintain process fluid pressure while 5,398,553 A * 3/1995 Hemp .. GO1F 1/58 allowing a plurality of electrical conductors to pass there T3, through. 5,773,723 A * 6/1998 Lewis .. GO1F 1/58. T3, 17 Claims, 3 Drawing Sheets 42. 17 140 2s 34 36. 32. is LS. 112. 30. Patent Apr. 19, 2016 Sheet 1 of 3 US 9,316,514 B2. - O. 114. 112. 1OO. Patent Apr. 19, 2016 Sheet 2 of 3 US 9,316,514 B2.

4 - 10. 132. 112. 2. 130. FIG 2. Patent Apr. 19, 2016 Sheet 3 of 3 US 9,316,514 B2. 50. 14 152. Y 2OO. 129. 132. 135. 133. 112. 12. 2 3. O. US 9,316,514 B2. 1. 2. HIGH PRESSURE WAFER STYLE A non-conductive liner is disposed in the flow conduit of the magnetic FLOWMETER single-piece chassis. A plurality of electromagnetic coils is configured to generate a flux into process fluid flowing BACKGROUND through the flow conduit. A pair of electrodes is configured to electrically couple to the process fluid. A feedthrough assem Industrial process control systems are used to monitor and bly is configured to maintain process fluid pressure while control industrial processes which produce or transfer liquids allowing a plurality of electrical conductors to pass there or the like. In Such systems, it is typically important to mea through. Sure"process variables' Such as temperatures, pressures, flow rates, and others.

5 Process control transmitters are used to 10 BRIEF DESCRIPTION OF THE DRAWINGS. measure such process variables and transmit information related to the measured process variable back to a central FIG. 1 is a diagrammatic view of a wafer-type electromag location Such as a central control room. netic flow sensor mounted to a process fluid conduit in accor One type of process variable transmitter is a magnetic dance with an embodiment of the present invention. flowmeter (or mag meter). magnetic flowmeters measure 15 FIG. 2 is a diagrammatic cross sectional view of an elec flow by using Faraday induction, which is an electromagnetic tromagnetic flow sensor in accordance with an embodiment effect. The magnetic flowmeter includes a coil that is ener of the present invention. gized to generate a magnetic field across a section of a flow FIG. 3 is a diagrammatic cross sectional view of an elec conduit, such as a pipe.

6 The magnetic field induces an elec tromagnetic flow sensor in accordance with another embodi tromotive force (emf) in the process fluid flow. The induced ment of the present invention. voltage drop across the process fluid flow is related to the flow velocity, which is proportional to the volumetric flow rate and DETAILED DESCRIPTION OF ILLUSTRATIVE. the cross sectional area of the flow conduit. The voltage drop EMBODIMENTS. is generally measured with electrodes that couple to the pro cess fluid, either directly or via capacitive coupling. 25 While wafer-type electromagnetic flow sensors offer a Electromagnetic flow measurement techniques are gener number of advantages over traditional flanged electromag ally applicable to ionic solutions, water-based fluids and other netic flow sensors, their application in high pressure applica conducting fluids. Illustrative environments where magnetic tions has been limited.

7 The ASME Pipe Flanges flowmeters are employed include: hygienic food and bever and Flange Fittings standard covers pressure-temperature rat age production, water treatment facilities, high-purity phar 30 ings, materials, dimensions, tolerances, marking, testing, and maceutical manufacturing, and chemical processing, includ methods of designating openings for pipe flanges and flanged inghazardous and corrosive process fluid flows. Additionally, fittings. Compliance with this standard is important in many mag meters are also employed in the hydrocarbon fuel indus contexts to ensure reliable, robust and safe pipe connections. try, including hydrocarbon extraction and processing as well Since a wafer-type electromagnetic flow sensor does not have as hydraulic fracturing techniques utilizing abrasive and cor 35 flanges, it can be at a disadvantage for containing process rosive slurries. fluid pressure. For example, the Model 8711 listed above has magnetic flowmeters provide fast and accurate flow mea an ASME rating of class 300.

8 However, applications in oil and Surements in applications where other flow measurement gas (specifically, water injection and water separation) are techniques, which introduce a flow measurement element routinely in the 1'-8" diameter line size and in the class (such as an orifice plate) into the process fluid flow, are not 40 600-class 2500 range. Thus, for such high pressure applica suitable. One of the significant costs in the manufacture of the tions, a flanged magnetic flow sensor may be the only option magnetic flowmeter is the flow tube through which the pro available to handle the required pressure. The limitations of cess fluid flows. This flow tube must bear the process fluid flanged magnetic flow sensors are mainly size and cost. While pressure and must not introduce leaks into the process. Typi a range offlanged magnetic flowmeter sensors are available to cally, the flow tube includes a pair of flanges that bolt to pipe 45 meet high pressure requirements, these models are some of flanges to create a robust process fluid connection.

9 However, the largest to produce, in terms of meter weight, lay length in some environments, the added cost of the flanged flow tube and cost. The amount of material in the flow tubes of such may be cost prohibitive. In such instances, a flangeless, or flanged magnetic flowmeter sensors results in a high price as wafer-type magnetic flowmeter is used. The wafer-type mag well as logistical challenges once the flowmeter is on-site. netic flowmeter includes a flow tube without any flanges. 50 Measuring flow under high pressure is becoming increas Thus, a wafer-type magnetic flowmeter can be more eco ingly common across many industries. Thus, it is important to nomical, compact and lightweight than traditional flanged provide a cost effective way to measure and/or record process magnetic flowmeters. One example of a commercially avail fluid flow while containing pressures up to ASME class 2500. able wafer-type magnetic flow sensor is sold under the trade Providing a magnetic flowmeter that can operate at pressures designation Model 8711 Wafer Sensor, available from Emer 55 as high as ASME class 2500 without the costs of a flanged son Process Management.

10 When a magnetic wafer sensor is design would provide important advantages to high pressure paired with Suitable transmitter electronics, such as those sold process fluid flow measurement applications. under trade designations, Model 8732E, Model 8712E, or FIG. 1 is a diagrammatic view of a wafer type electromag 8712H, a fully operational wafer-type magnetic flowmeter is netic flow sensor mounted to a process fluid conduit in accor provided. 60 dance with an embodiment of the present invention. Flow sensor 100 is mounted to pipe 102. For clarity, only one side SUMMARY of the pipe mount is shown. Pipe 102 includes a pipe flange 104 with a number of bolt holes 106 therethrough. Bolt holes A wafer-type electromagnetic flow sensor includes a in pipe flange 106 are aligned with bolt holes in a cooperative single-piece chassis having a pair of faces and a flow conduit 65 pipe flange (not shown) Such that bolts can be used to essen extending between the pair of faces.