US20100307643A1 - method for reducing stress in a conduit brace assembly - Google Patents

method for reducing stress in a conduit brace assembly Download PDF

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Publication number
US20100307643A1
US20100307643A1 US12/745,312 US74531210A US2010307643A1 US 20100307643 A1 US20100307643 A1 US 20100307643A1 US 74531210 A US74531210 A US 74531210A US 2010307643 A1 US2010307643 A1 US 2010307643A1
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US
United States
Prior art keywords
conduit
connection joint
brace
localized heat
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/745,312
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English (en)
Inventor
Bryan Dold
Allen Honegger
Gerry Berry
Clinton R. Griffin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Micro Motion Inc
Original Assignee
Micro Motion Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micro Motion Inc filed Critical Micro Motion Inc
Assigned to MICRO MOTION, INC. reassignment MICRO MOTION, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERRY, GERRY, DOLD, BRYAN, GRIFFIN, CLINTON R., HONEGGER, ALLEN
Publication of US20100307643A1 publication Critical patent/US20100307643A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/08—Surface hardening with flames
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8404—Coriolis or gyroscopic mass flowmeters details of flowmeter manufacturing methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18—Supports or connecting means for meters
    • G01F15/185—Connecting means, e.g. bypass conduits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a method using localized heating to relieve stress in a conduit brace assembly.
  • Vibrating flow devices such as, for example, densitometers and Coriolis flow meters are used for measuring a characteristic of flowing substances, such as, for example, density, mass flow rate, volume flow rate, totalized mass flow, temperature, and other information.
  • Vibrating flow devices include one or more conduits, which may have a variety of shapes, such as, for example, straight, U-shaped, or irregular configurations.
  • the one or more conduits have a set of natural vibration modes, including, for example, simple bending, torsional, radial, and coupled modes.
  • the one or more conduits are vibrated by at least one drive at a resonance frequency in one of these modes for purposes of determining a characteristic of the flowing substance.
  • Vibrating flow devices include one or more electronics that transmit a sinusoidal drive signal to a drive, which is typically a magnet/coil combination with the magnet typically being affixed to the conduit and the coil being affixed to a supporting structure or to another conduit.
  • the drive signal causes the drive to vibrate the one or more conduits at a resonance frequency in one of the natural modes.
  • the drive signal may be a periodic electrical current transmitted to the coil.
  • Vibrating flow devices include at least one pick-off that detects the motion of a conduit and generates a sinusoidal pick-off signal representative of the motion.
  • the pick-off signal is transmitted to the one or more electronics, which, according to well known principals, determines a characteristic of the flowing substance or adjusts the drive signal, if necessary.
  • Vibrating flow devices may have one or more brace bars. It may be desirous to use a brace bar so that the vibrational mode employed for purposes of determining a characteristic of the flowing substance does not occur simultaneously with other modes of vibration. Accordingly, by varying the number and position of brace bars, the frequency at which the various modes of vibration will be induced can be somewhat controlled. Furthermore, it may also be desirous to use a brace bar in order to reduce the stress, as the one or more conduits oscillate, on the connecting area between a manifold or flange and the one or more conduits.
  • Brace bars are typically connected to the conduits via a connection joint generated through a welding, brazing, or soldering operation. Connection of the brace bars to the conduits may stress or weaken the conduits in areas around where the connection joint is located. Since the area of the connection joint is subject to stress due to cyclical loading imparted by the oscillations, any stressing or weakening around this area may lead to catastrophic failure of the conduits.
  • the present invention is directed to overcoming these disadvantages inherent in prior art conduit brace assemblies for vibrating conduits in flow devices.
  • a method for reducing stress in a conduit brace assembly comprises the steps of forming a connection joint that connects a brace bar to a conduit and applying localized heat at the connection joint to relieve stress.
  • a method for reducing stress in a conduit brace assembly comprises the steps of:
  • the method further comprises the step of applying localized heat on an area of the conduit that is adjacent to the connection joint in order to relieve stress.
  • connection joint Preferably, the application of localized heat heats the connection joint to a temperature between 704° C. and 816° C.
  • the application of localized heat heats the connection joint to a temperature of at least 760° C.
  • the localized heat is generated by a flame.
  • the localized heat is generated by an induction coil.
  • the method further comprises the step of allowing the connection joint to air cool after the localized heat is applied.
  • the localized heat is applied while the conduit and brace bar are located on a production line.
  • the method further comprises the step of connecting at least one drive and at least one pick off to the conduit before the application of the localized heat.
  • the method further comprises the steps of forming another connection joint that connects another brace bar to the conduit and applying localized heat at the another connection joint to relieve stress.
  • the method further comprises the step of applying localized heat on an area of the conduit that is adjacent to the another connection joint in order to relieve stress.
  • the brace bar is generally positioned at an end of the conduit.
  • the method further comprises the steps of forming another connection joint that connects another brace bar to the conduit, whereby the brace bar and the another brace bar are symmetrically located on the conduit and applying localized heat at the another connection joint to relieve stress.
  • the method further comprises the steps of forming another connection joint to connect the brace bar to another conduit and applying localized heat at the another connection joint to relieve stress.
  • connection joint is formed via welding.
  • FIG. 1 depicts a perspective view of a vibrating flow device according to one embodiment of the present invention.
  • FIG. 2 depicts a perspective view of a localized heating process using a flame.
  • FIG. 3 depicts a perspective view of a localized heating process using an induction coil.
  • FIG. 1 illustrates an example of a vibrating flow device 5 in the form of a Coriolis flow meter comprising a sensor assembly 10 and one or more electronics 20 .
  • the one or more electronics 20 are connected to sensor assembly 10 via leads 100 to measure a characteristic of a flowing substance, such as, for example, density, mass flow rate, volume flow rate, totalized mass flow, temperature, and other information over path 26 .
  • the sensor assembly 10 of the present example includes a pair of flanges 101 and 101 ′; manifolds 102 and 102 ′; drive 104 ; pick-offs 105 - 105 ′; conduits 103 A and 103 B, and brace bars 120 - 124 .
  • Manifolds 102 , 102 ′ are affixed to opposing ends of the conduits 103 A, 103 B.
  • Drive 104 and pick-offs 105 and 105 ′ are connected to conduits 103 A and 103 B.
  • the drive 104 is affixed to conduits 103 A, 103 B in a position where the drive 104 can vibrate the conduits 103 A, 103 B in opposition to one another.
  • Pick-offs are affixed to conduits 103 , 103 B at opposing ends to detect the phase difference in the vibrations at opposing ends of the conduits 103 A, 103 B. It should be apparent to those skilled in the art that it is within the scope of the present invention to use the principals discussed herein in conjunction with any type of vibrating flow device, including, for example, densitometers, regardless of the number of conduits, the number of drives, the number of pick-offs, the operating mode of vibration or the determined characteristic of the flowing substance.
  • Flanges 101 and 101 ′ of the present example are affixed to manifolds 102 and 102 ′ and connect conduits 103 A, 103 B to a pipeline (not shown).
  • sensor assembly 10 When sensor assembly 10 is inserted into a pipeline system (not shown) which carries the flowing substance, the substance enters sensor assembly 10 through flange 101 , passes through inlet manifold 102 where the total amount of material is directed to enter conduits 103 A and 103 B, flows through conduits 103 A and 103 B, and back into outlet manifold 102 ′ where it exits the sensor assembly 10 through flange 101 ′.
  • Conduits 103 A and 103 B are preferably selected and appropriately mounted to inlet manifold 102 and outlet manifold 102 ′ so as to have substantially the same mass distribution, moments of inertia, and elastic modules about bending axes WW and W′-W′ respectively.
  • the conduits extend outwardly from the manifolds in an essentially parallel fashion.
  • the conduits 103 A, 103 B are shown provided with a generally U-shape, it is within the scope of the present invention to provide the conduits 103 A, 103 B with other shapes, such as, for example, straight or irregular shapes.
  • conduits 103 A-B are driven by drive 104 in opposite directions about their respective bending axes W and W′ and at what is termed the first out of phase bending mode of the flow meter.
  • Drive 104 may comprise one of many well known arrangements, such as a magnet mounted to conduit 103 A and an opposing coil mounted to conduit 103 B. An alternating current is passed through the opposing coil to cause both conduits 103 A, 103 B to oscillate.
  • a suitable drive signal is applied by one or more electronics 20 , via lead 110 to drive 104 .
  • the one or more electronics 20 produces a drive signal and transmits it to the drive 104 via lead 110 , which causes drive 104 to oscillate conduits 103 A and 103 B. It is within the scope of the present invention to produce multiple drive signals for multiple drives, however.
  • One or more electronics 20 processes left and right velocity signals from pick-offs 105 , 105 ′ to compute mass flow rate.
  • Path 26 provides an input and an output means that allows one or more electronics 20 to interface with an operator.
  • An explanation of the circuitry of one or more electronics 20 is unneeded to understand the present invention and is omitted for brevity of this description.
  • FIG. 1 is provided merely as an example of the operation of one possible vibrating flow device and is not intended to limit the teaching of the present invention.
  • the embodiment shown is provided with a first pair of inner brace bars 122 - 123 and a second pair of outer brace bars 120 - 121 .
  • the inner brace bar 122 is generally located at a first end 126 of the conduits 103 A, 103 B and the inner brace bar 123 is generally located at a second end 127 of the conduits 103 A, 103 B.
  • the outer brace bar 120 is generally located at the first end 126 of the conduits 103 A, 103 B and the outer brace bar 121 is generally located at the second end 127 of the conduits 103 A, 103 B.
  • each pair of the brace bars 120 , 121 and 122 , 123 is preferably generally positioned so that they are symmetrically located on the conduits 103 A, 103 B.
  • the present example is provided with a first set 122 , 123 and a second set 120 , 121 , it is within the scope of the present invention to provide any number of brace bars, such as, for example, a single set 122 , 123 or 120 , 121 .
  • the brace bars 120 - 123 are connected to the conduits 103 A, 103 B via connection joints 125 .
  • the brace bars 120 - 123 are typically welded to the conduits 103 A, 103 B via a Gas Tungsten Arc Welding process, however, it is within the scope of the present invention to utilize other welding processes, such as, for example, Flux Cored Arc Welding process, Gas Metal Arc Welding process, or to braze or solder the brace bars 120 - 123 to the conduits 103 A, 103 B.
  • a localized heating process is used to relieve stress at the connection joints 125 and strengthen the connection joints 125 .
  • a localized heating process may be used to relieve stress on areas of the conduits 103 A, 103 B located adjacent to the connection joints 125 and to strengthen areas on the conduits 103 A, 103 B located adjacent to the connection joints 125 .
  • FIG. 2 shows a localized heating process using a flame, such as, for example, from a torch 200
  • FIG. 3 shows a localized heating process that uses an induction coil 300 that is positioned around the connection joints 125 and/or areas of the conduits 103 A, 103 B that are adjacent to the connection joints 125 .
  • the basic components of an induction heating system are an AC power supply 301 and the induction coil 300 .
  • the power supply 301 sends alternating current through the coil, generating a magnetic field.
  • connection joints 125 and/or areas of the conduits 103 A, 103 B that are adjacent to the connection joints 125 are placed in the coil 300 , as is the case in FIG. 3 , the magnetic field induces eddy currents in the connection joints 125 and/or areas of the conduits 103 A, 103 B that are adjacent to the connection joints 125 , which, in turn, generates precise amounts of localized heat without requiring physical contact with the coil 300 .
  • connection joints 125 and/or the areas on the conduits 103 A, 103 B that are adjacent to the connection joints 125 that may be heated to a temperature in the range of 704° C. to 816° C., and, preferably, to a temperature of at least 760° C.
  • conduits 103 A, 103 B and brace 120 - 123 assembly may be allowed to air cool; however, alternative methods of cooling are within the scope of the present invention, such as, for example, forced air or quenching.
  • the present method allows stress to be relieved without the use of an oven.
  • the sensor assembly 10 may be assembled, although not necessarily so, without requiring the conduits 103 A, 103 B and brace 120 - 123 assembly to be removed from a production line for purposes of stress relief and cooling.
  • conduit 103 A or 103 B it is within the scope of the present invention to utilize a single conduit, such as, for example, conduit 103 A or 103 B and connect this conduit to a supporting structure using at least one brace bar.
  • the brace bar may be integral to the supporting structure or connected to the supporting structure via any manner, including, but not limited to welding, brazing or soldering.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Measuring Volume Flow (AREA)
  • Heat Treatment Of Articles (AREA)
US12/745,312 2007-12-17 2007-12-17 method for reducing stress in a conduit brace assembly Abandoned US20100307643A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2007/087745 WO2009078859A1 (en) 2007-12-17 2007-12-17 A method for reducing stress in a conduit brace assembly

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US20100307643A1 true US20100307643A1 (en) 2010-12-09

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US12/745,312 Abandoned US20100307643A1 (en) 2007-12-17 2007-12-17 method for reducing stress in a conduit brace assembly

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US (1) US20100307643A1 (ja)
EP (1) EP2231883A1 (ja)
JP (1) JP2011510165A (ja)
CN (1) CN101903538A (ja)
AR (1) AR069551A1 (ja)
WO (1) WO2009078859A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107430020A (zh) * 2015-03-25 2017-12-01 高准公司 减小振动流量计中钎焊接头应力的装置和方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102494726B (zh) * 2011-11-18 2014-03-26 青岛澳波泰克安全设备有限责任公司 科里奥利质量流量计、振动管密度计及其中使用的振动片
CN109870209A (zh) * 2017-12-01 2019-06-11 高准有限公司 高压流量计的支撑构件和高压流量计
DE102018102379B4 (de) * 2018-02-02 2023-02-02 Endress + Hauser Flowtec Ag Coriolis-Messaufnehmer eines Coriolis-Messgeräts mit einer in Schwingungserreger bzw. Schwingungssensor integrierten Temperaturmessvorrichtung und ein solches Coriolis-Messgerät

Citations (4)

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Publication number Priority date Publication date Assignee Title
US2229405A (en) * 1939-09-14 1941-01-21 Ross Heater & Mfg Company Inc Welding method
US5370002A (en) * 1993-07-23 1994-12-06 Micro Motion, Inc. Apparatus and method for reducing stress in the brace bar of a Coriolis effect mass flow meter
US6308580B1 (en) * 1999-03-19 2001-10-30 Micro Motion, Inc. Coriolis flowmeter having a reduced flag dimension
US6884975B2 (en) * 2002-11-12 2005-04-26 The Boeing Company Localized stress relief by induction heating

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GB882692A (en) * 1958-05-02 1961-11-15 Paul Carl Peddinghaus Improvements relating to apparatus for the flame hardening of metal
JPS5443810A (en) * 1977-09-14 1979-04-06 Hitachi Ltd Treating method by induction heating
JP3439024B2 (ja) * 1996-05-21 2003-08-25 三菱重工業株式会社 残留応力低減方法
JPH11209825A (ja) * 1998-01-23 1999-08-03 Toshiba Corp 溶接後熱処理装置
KR20030048853A (ko) * 2001-12-13 2003-06-25 현대자동차주식회사 화염열처리 냉각수 공급장치
JP3649223B2 (ja) * 2003-01-08 2005-05-18 株式会社日立製作所 配管系の熱処理方法および熱処理装置
US7631561B2 (en) * 2006-03-22 2009-12-15 Endress + Hauser Flowtec Ag Measuring transducer of vibration-type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229405A (en) * 1939-09-14 1941-01-21 Ross Heater & Mfg Company Inc Welding method
US5370002A (en) * 1993-07-23 1994-12-06 Micro Motion, Inc. Apparatus and method for reducing stress in the brace bar of a Coriolis effect mass flow meter
US6308580B1 (en) * 1999-03-19 2001-10-30 Micro Motion, Inc. Coriolis flowmeter having a reduced flag dimension
US6884975B2 (en) * 2002-11-12 2005-04-26 The Boeing Company Localized stress relief by induction heating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107430020A (zh) * 2015-03-25 2017-12-01 高准公司 减小振动流量计中钎焊接头应力的装置和方法

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Publication number Publication date
EP2231883A1 (en) 2010-09-29
CN101903538A (zh) 2010-12-01
AR069551A1 (es) 2010-02-03
JP2011510165A (ja) 2011-03-31
WO2009078859A1 (en) 2009-06-25

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AS Assignment

Owner name: MICRO MOTION, INC., COLORADO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DOLD, BRYAN;HONEGGER, ALLEN;BERRY, GERRY;AND OTHERS;REEL/FRAME:024455/0124

Effective date: 20071217

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION