CN101553714B - Measuring system for a medium flowing in a process line - Google Patents

Measuring system for a medium flowing in a process line Download PDF

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Publication number
CN101553714B
CN101553714B CN200780032581.5A CN200780032581A CN101553714B CN 101553714 B CN101553714 B CN 101553714B CN 200780032581 A CN200780032581 A CN 200780032581A CN 101553714 B CN101553714 B CN 101553714B
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flow conditioner
flow
measuring system
measuring tube
measuring
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CN101553714A (en
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赖纳·霍克
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Endress and Hauser Flowtec AG
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Endress and Hauser Flowtec AG
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Priority claimed from DE102006047815A external-priority patent/DE102006047815A1/en
Application filed by Endress and Hauser Flowtec AG filed Critical Endress and Hauser Flowtec AG
Priority claimed from PCT/EP2007/057468 external-priority patent/WO2008009720A2/en
Publication of CN101553714A publication Critical patent/CN101553714A/en
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    • 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
    • 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
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • G01F1/3209—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters using Karman vortices

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The measuring system is placed in the course of a process line and is used to detect at least one measurement variable of a medium flowing in the process line. The system comprises a measuring sensor for this purpose with a measuring tube that conducts the medium to be measured and a sensor assembly which has at least one sensor element that reacts primarily to the measurement variable to be detected and which supplies at least one measurement signal that is influenced by the measurement variable by means of the sensor element or elements. In addition, the measuring system comprises measuring electronics that communicate with the measuring sensor and that use the measurement signal(s) to generate, at least intermittently, at least one measured value that represents the current measurement variable. The measuring tube of said measuring system has a smaller flow cross-section than a supply segment of the process line that is connected to the inlet side of the measuring system. The measuring system therefore also has a flow conditioner that is situated on the inlet side of the measuring tube, extends between said tube and the supply segment of the process line and has a lumen which tapers towards the measuring tube and through which the medium flows during operation. The flow conditioner has at least one baffle which is situated upstream of the outlet end of said conditioner, projects into the lumen of the latter and against which the medium in the conditioner flows.

Description

The measuring system that is used for the mobile medium of process line
Technical field
The present invention relates to a kind of measuring system, at least one measurand that is used for the mobile medium of measuring process pipeline, this measuring system has measurement translator and the flow conditioner between measurement translator and process line, and wherein said measurand is mass rate, density, viscosity, pressure etc. particularly.
Background technology
In the industrial process field of measuring technique, particularly contact chemical process automation or manufacture process robotization, the measured value signal that represents this measurand for the measurand that detects the description process and generation, near the measuring system that use is installed process, its be directly installed on the process line of being crossed by MEDIA FLOW or within.Measurand to be detected can be such as the mass rate, volumetric flow rate, flow velocity, density, viscosity, temperature etc. that are guiding or the liquid state held in this process line such as constituting pipeline, Powdered, vaporous or gaseous process medium.
This measuring system is the measuring system of wherein having used the on-line measurement instrument, and this on-line measurement instrument has the magnetic induction measurement transducer; Perhaps analyze the measurement translator of hyperacoustic journey time of streamwise emission, particularly according to the measurement translator of Doppler's principle work; Perhaps transducer of vibration type, particularly Ke Liaoli mass flow transducer, density converter etc.The essential structure of magnetic induction transducer and function have for example been carried out abundant description: EP-A 1 039 269, US-A 60 31 740, US-A 55 40 103, US-A 53 51554, US-A 45 63 904 in Publication about Document; About ultrasound transducer, for example referring to US-B 63 97 683, US-B 63 30 831, US-B 62 93 156, US-B 61 89 389, US-A 55 31 124, US-A 54 63 905, US-A 51 31 279, US-A 47 87 252.In addition, the background of these problems is known for those skilled in the art, thereby has omitted detailed explanation here.explained in detail hitherto known this other examples that particularly utilize the measuring system of compact on-line measurement instrument formation of those skilled in the art in Publication about Document: EP-A 984 248, GB-A 21 42 725, US-A 43 08 754, US-A 44 20 983, US-A 44 68 971, US-A 45 24610, US-A 47 16 770, US-A 47 68 384, US-A 50 52 229, US-A 50 52 230, US-A 51 31 279, US-A 52 31 884, US-A 53 59 881, US-A 54 58 005, US-A 54 69 748, US-A 56 87 100, US-A 57 96 011, US-A 58 08 209, US-A 60 03 384, US-A 60 53 054, US-A 60 06 609, US-B 63 52 000, US-B 63 97 683, US-B 65 13 393, US-B 66 44 132, US-B 66 51 513, US-B 68 80 410, US-B 69 10 387, US-A 2005/0092101, WO-A 88/02476, WO-A 88,/02 853, WO-A 95,/16 897, WO-A 00,/36 379, WO-A 00/14485, WO-A 01/02816, WO-A 02/,086 426.
In order to detect each measurand, the measuring system of type discussed here comprises corresponding measurement translator, and it inserts in the process line of boot media, and for generation of at least one measuring-signal, electric signal particularly, it as far as possible accurately represents the main measurand that detects.For this reason, measurement translator generally includes: measuring tube, and it inserts in pipeline and is used for the guiding flow media; With corresponding physics-electronic sensor apparatus.Sensor device comprises at least one sensor element, and this sensor element is mainly reacted for variable to be measured or its variation, the measuring-signal that is affected by measurand suitably to produce during operation at least one.In order further to process or analyze at least one measuring-signal, sensor also is connected with the measurement electronic installation.Measuring electronic installation communicates by letter with measurement translator in suitable mode, in measuring system operating period by using at least one measuring-signal to produce at least off and at least one instantaneous measured value that represents measurand, such as mass flow measurement, volume flow measurement value, density measurement, viscosity measurement value, pressure measuring value, measured temperature etc.
In order to hold the measurement electronic installation, this measuring system also comprises suitable electronic device housing, its for example US-A 63 97 683 or WO-A 00,/36 379 advise, can and only utilize flexible wire to be connected with measurement translator away from the measurement translator setting.Yet, as an alternative, as shown in EP-A 903 651 or EP-A 1 008 836, by (for example forming compact on-line measurement instrument, Ke Liaoli mass flow/density measuring instrument, ultrasonic flowmeter, vortex shedding flow meter, thermal flow meter, magnetic induction flowmeter etc.), electronic device housing can be set directly on measurement translator or hold discretely on the measurement translator shell of measurement translator.In the later case, for example shown in EP-A 984 248, US-A 47 16 770 or US-A 63 52 000, electronic device housing usually also is used for holding some mechanical parts of measurement translator, for example deformable body or the vibrating mass of membranaceous, bar-shaped, the sleeve-shaped of deformation or tubulose due to mechanical effect during operation; About this point, referring to above-mentioned US-A 63 52 000.
In addition, the measuring system of described type usually is connected to each other via being connected to the data-transmission system of measuring electronic installation and/or is connected with suitable process computer, and measuring system for example transfers to process computer by 4～20mA current return and/or digital data bus with measured value signal.In this case, as data transmission system be field bus system, serial field bus system particularly is such as PROFIBUS-PA, FOUNDATIONFIELDBUS and corresponding host-host protocol.Utilize process computer, the measured value signal of transmitting can be further processed and as corresponding measurement result and for example visual on monitor, and/or be converted into control signal for process controling element (for example, solenoid valve, motor etc.).
As what discuss in GB-A 21 42 725, US-A 58 08 209, US-A 2005/0092101, US-B 68 80 410, US-B 66 44 132, US-A 60 53 054, US-B 66 44 132, US-A 50 52 229 or US-B 65 13 393, the measuring system of on-line measurement instrument and described type can have the measuring accuracy that more or less depends on pattern of flow equally.Interested especially in this is the temporal properties of the flow pattern in measuring tube.Consider turbulent flow (mobile Reynolds number is greater than 2300) on wider reynolds number range each other very in detail and thereby have close impact for measuring accuracy, so usually expect that in many measuring systems testing medium has high flow velocities.In order to realize fully high measuring accuracy, Reynolds number is much larger than 4000 usually in eddy-current flowmeter.
So, in the measuring system type of discussing, often have in the situation of relatively large bore and/or in the relatively slow applicable cases of media flow at process line at least, it is less than the flow cross section of the process line supply section that is connected to measuring system at entrance side that the structure measuring tube makes measuring tube.So the medium streamwise experience that flows is accelerated, thereby Reynolds number increases.The embodiment of this principle is particularly in the measuring system of utilizing ultrasonic measurement instrument and/or eddy-current flowmeter work and/or to be used for measuring at least part of be mainly or all particularly that the situation of the measuring system of gaseous medium is confirmed.
For example consider the basis as the eddy-current flowmeter measuring principle, with the right bluff body of mobile phase on the exfoliation rates of whirlpool and main measurand to be detected (namely, volumetric flow rate or flow velocity) between relation only have when Reynolds number surpasses 20000 and can fully be regarded as linearity, so must be implemented in difference relatively large between the flow cross section of process line and measuring tube.
In order to create on short as far as possible distance from the supply section to the zone of transition that as far as possible better limits that has than the measuring tube of small flow xsect, as what advise in GB-A 21 42 725, US-A 5,808 209 or US-A 2005/0092101, suitable flow conditioner is provided in measuring system usually, and its inner chamber is tapered and during operation by the MEDIA FLOW warp towards measuring tube.Flow conditioner is arranged on the entrance side of measuring tube and supplies between section at measuring tube and process line.Flow conditioner is larger than the flow cross section of measuring tube towards the flow cross section of the inlet end of process line supply section, and flow conditioner is towards the flow cross section of the endpiece of the measuring tube flow cross section less than inlet end.
Particularly in US-A 58 08 209 and US-A 2005/0092101, further contacting the flow conditioner that exists in situation separately points out, the transition that realizes between the flow cross section of two different sizes must keep not having continuously and definitely defective (for example, causing the rib of whirlpool).
This can process flow conditioner and the surface of the joint that may exist at the measuring system entrance area by relative complex ground, and is guaranteed satisfactorily.Yet, have been found that, although use the flow conditioner of the above-mentioned type, fluid (particularly is being arranged in the process line that the connects supply section of measuring system upstream in the measuring system entrance area, perhaps in the same zone that is used for connecting supply section and the entrance side joint flange of measuring system) all will cause the marked change of measuring tube inner chamber internal flow characteristics than microvariations, and thereby cause the measuring accuracy reduction.
On the surface, a kind of what eliminate this problem may be to process suitably the entrance area of measuring system and process line supply section or entrance side flange to connect.Yet, there is no measuring system user's further requirement, this processing is actual can't be carried out.This is particularly because the selection of measuring system can be that had before installed may oversize measuring system need to be replaced especially for the actual flow characteristic because in existing factory building.In this, not only unpredictable for the actual installation condition of measuring system, and as practical factor and immutable and thereby uncontrollable.
What another avoided this problem may be the installation length that increases flow conditioner, basicly stable and static with what as far as possible realized before entering measuring tube at fluid flowing in flow conditioner.Yet this may mean the considerable increase of the installation length of whole measuring system.Consider situation above-mentioned, wherein existing traditional measurement system will be replaced by the measuring system that the upstream is connected with flow conditioner, the installation length of measuring system more or less is determined in advance so, thereby the increase of the installation length of flow conditioner is only feasible in very limited scope.Consider the shortcoming of traditional flow conditioner, the range of application of such measuring system is still very limited undoubtedly.
Summary of the invention
So, the purpose of this invention is to provide a kind of measuring system for flow media, it realizes the mobile Reynolds number of raising from the process line to the measuring tube with short as far as possible installation length, and however, its measuring accuracy is insensitive for disturbance possible in the medium of measuring system upstream flow to a great extent, and its medium is in supply section and/or the intermediate transition zone between process line and actual measuring system.
In order to achieve this end, the invention reside in a kind of measuring system, its insertion process pipeline is particularly in pipeline, at least one measurand for detection of the medium that flows in process line, particularly mass rate, volumetric flow rate, flow velocity, density, viscosity, pressure, temperature etc., this measuring system comprises:
-measurement translator, it comprises
--straight measuring tube particularly, it is used for guiding testing medium and less than the flow cross section of the process line supply section that is connected to measuring system at entrance side, and
--sensor device, its
---have at least one mainly for variable to be detected its variation sensor element of reacting particularly, and
---utilize at least one sensor element that at least one measuring-signal by the measurand impact is provided;
-measurement the electronic installation of communicating by letter with measurement translator, this measurement electronic installation produces at least one instantaneous measured value that represents measurand at least off and on by using at least one measuring-signal, particularly mass flow measurement, volume flow measurement value, density measurement, viscosity measurement value, pressure measuring value, measured temperature; With
-flow conditioner, it is arranged on the entrance side of measuring tube and between measuring tube and process line supply section, flow conditioner has the inner chamber that is tapered and is crossed by MEDIA FLOW in operation towards measuring tube;
-wherein flow conditioner is towards the flow cross section of the inlet end of the process line supply section flow cross section greater than measuring tube, and flow conditioner towards the flow cross section of the endpiece of the measuring tube flow cross section less than the inlet end of flow conditioner; With
-wherein flow conditioner comprises at least one interior edge, this interior edge is arranged on the upstream of endpiece and charges in the inner chamber of flow conditioner, especially, this interior edge is along the circumference circulation of flow conditioner, and the medium that guides in flow conditioner during operation flows facing to interior edge.
In addition, the invention reside in a kind of method of at least one measurand of the medium for utilizing measuring system testing process pipeline to flow, in this measuring system insertion process pipeline and have the flow conditioner that is connected to process line supply section and the measurement translator that is connected to the process adjuster, measurand is mass rate, volumetric flow rate, flow velocity, density, viscosity, pressure, temperature etc. particularly, and the method comprises the following steps:
-make testing medium flow into flow conditioner from the supply section;
-accelerate flow media along the virtual y direction of flow conditioner, and the fixing ring-type whirlpool of particularly home position of at least one basic static of inducting in the medium that flows in the entrance area of flow conditioner makes the virtual maximum principal axis of inertia of this at least one ring-type whirlpool substantially overlap with the virtual longitudinal axis of flow conditioner and/or the virtual longitudinal axis of measuring tube;
-make testing medium flow through at least one ring-type whirlpool, and make testing medium flow out flow conditioner, enter the measuring tube of the measurement translator that connects; And
-by using at least one mainly to the measurand variation of the measurand sensor element of reacting particularly, produce at least one by the measuring-signal of measurand impact to be detected.
In the first embodiment of measuring system of the present invention, at least one is charged into the interior edge of flow conditioner inner chamber and constructs like this and be arranged in flow conditioner, makes it be basically perpendicular to the virtual longitudinal axis of flow conditioner and/or perpendicular to the virtual longitudinal axis of measuring tube.
In the second embodiment of measuring system of the present invention, at least one interior edge of charging into the flow conditioner inner chamber forms circumferentially, particularly circularly around, and thereby self-enclosed.
In the 3rd embodiment of measuring system of the present invention, at least one interior edge of charging into the flow conditioner inner chamber be arranged on flow conditioner inlet end near, particularly with this inlet end next-door neighbour.
In the 4th embodiment of measuring system of the present invention, at least one interior edge of charging into the flow conditioner inner chamber is set directly at the inlet end of flow conditioner.
In the 5th embodiment of measuring system of the present invention, at least one charges into the edge radius of interior edge of flow conditioner inner chamber less than 2mm, particularly less than 0.6mm.
In the 6th embodiment of measuring system of the present invention, flow conditioner is cylindrical shape at entrance area at least substantially.
In the 7th embodiment of measuring system of the present invention, measuring tube is cylindrical shape at entrance area at least substantially.
In the 8th embodiment of measuring system of the present invention, flow conditioner is cylindrical shape at exit region at least substantially.
In the 9th embodiment of measuring system of the present invention, particularly the measuring tube of cylindrical shape is straight substantially.
In the tenth embodiment of measuring system of the present invention, the flow cross section of process line supply section keeps greater than 1.5 with the xsect ratio of the flow cross section of measuring tube.
In the 11 embodiment of measuring system of the present invention, the flow cross section of process line supply section keeps less than 10 with the xsect ratio of the flow cross section of measuring tube.
In the 12 embodiment of measuring system of the present invention, the flow cross section of process line supply section and the xsect of the flow cross section of measuring tube are than remaining in 1.66～9.6 scope.
In the 13 embodiment of measuring system of the present invention, charge into the xsect of flow conditioner inner chamber of interior edge constraint of flow conditioner inner chamber less than the flow cross section of process line supply section by at least one.
In the 14 embodiment of measuring system of the present invention, by the shrinkage ratio maintenance of the xsect of interior edge constraint and the flow cross section of process line supply section less than 0.9.
In the 15 embodiment of measuring system of the present invention, by the shrinkage ratio maintenance of the xsect of interior edge constraint and the flow cross section of process line supply section greater than 0.1.
In the 16 embodiment of measuring system of the present invention, remained on by the shrinkage ratio of the flow cross section of the xsect of interior edge constraint and process line supply section in 0.25～0.85 scope.
In the 17 embodiment of measuring system of the present invention, the poor maintenance greater than 0.5 between xsect ratio and shrinkage ratio.
In the 18 embodiment of measuring system of the present invention, the poor maintenance less than 10 between xsect ratio and shrinkage ratio.
In the 19 embodiment of measuring system of the present invention, the poor maintenance greater than 0.83 and less than 9.5 between xsect ratio and shrinkage ratio.
In the 20 embodiment of measuring system of the present invention, by the ratio of compression maintenance of the xsect of interior edge constraint and the flow cross section of measuring tube greater than 1.2.
In the 21 embodiment of measuring system of the present invention, by the ratio of compression maintenance of the xsect of interior edge constraint and the flow cross section of measuring tube less than 5.
In the 22 embodiment of measuring system of the present invention, remained on by the ratio of compression of the flow cross section of the xsect of interior edge constraint and measuring tube in 1.3～3 scope.
In the 23 embodiment of measuring system of the present invention, the poor maintenance greater than 0.2 between xsect ratio and ratio of compression.
In the 24 embodiment of measuring system of the present invention, the poor maintenance less than 10 between xsect ratio and ratio of compression.
In the 25 embodiment of measuring system of the present invention, the poor maintenance between xsect ratio and pressure contracting ratio is greater than 0.25 and less than 8.
In the 26 embodiment of measuring system of the present invention, the relative aperture of measuring tube is connected to measuring system at entrance side the bore of process line supply section is little.
In the 27 embodiment of measuring system of the present invention, the bore towards the relative aperture measuring tube of the inlet end of process line supply section of flow conditioner is large, and the bore towards the inlet end of the relative aperture flow conditioner of the endpiece of measuring tube of flow conditioner is little.
In the 28 embodiment of measuring system of the present invention, at least one interior edge of charging into the flow conditioner inner chamber forms like this, makes the internal diameter maintenance of the inlet end of flow conditioner supply the bore of section less than process line.
In the 29 embodiment of measuring system of the present invention, the relative aperture of the bore of process line supply section and the bore of measuring tube keeps greater than 1.1.
In the 30 embodiment of measuring system of the present invention, the relative aperture of the bore of process line supply section and the bore of measuring tube keeps less than 5.
In the 31 embodiment of measuring system of the present invention, the relative aperture of the bore of process line supply section and the bore of measuring tube remains in 1.2～3.1 scope.
In the 32 embodiment of measuring system of the present invention, the diameter of xsect of flow conditioner inner chamber of interior edge constraint of being charged into the flow conditioner inner chamber by at least one is less than the bore of process line supply section.
In the 33 embodiment of measuring system of the present invention, the installation length of measuring tube is greater than the installation length of flow conditioner, the installation length that makes flow conditioner with the installation length of the installation length of measuring tube than keeping less than 1.
In the 34 embodiment of measuring system of the present invention, the bore of process line supply section and the relative aperture of the bore of measuring tube are corresponding at least 10% of the installation length ratio of the installation length of flow conditioner and the installation length of measuring tube.
In the 35 embodiment of measuring system of the present invention, at least one particularly immerses the sensor element of medium during operation and the inlet end of measuring tube is arranged in measuring tube apart and/or on measuring tube, particularly is set directly on measuring tube.
In the 36 embodiment of measuring system of the present invention, at least one sensor element is placed like this, makes described distance and the ratio of the bore of measuring tube keep greater than 1.
In the 37 embodiment of measuring system of the present invention, at least one interior edge of charging into the flow conditioner inner chamber limits the shock surface of flow conditioner, the particularly Cyclic Rings that this shock surface is arranged on flow conditioner around borderline region in and be used for its upper mobile medium of interception.
In the first development of the 37 embodiment of measuring system of the present invention, shock surface arranges like this and is oriented in flow conditioner, make its at least part of virtual longitudinal axis that is basically perpendicular to flow conditioner extend, and/or its virtual longitudinal axis of partly being basically perpendicular to measuring tube extends.
In the second development of the 37 embodiment of measuring system of the present invention, shock surface height diametrically is at least 1mm.
In the 3rd development of the 37 embodiment of measuring system of the present invention, shock surface forms annular surface.
In the 4th development of the 37 embodiment of measuring system of the present invention, at least part of convex shoulder by being shaped in the flow conditioner entrance side of shock surface and interior edge forms, particularly circulates and/or self-enclosed convex shoulder.
In the 5th development of the 37 embodiment of measuring system of the present invention, it is the plane substantially that shock surface is at least part of.
In the 6th development of the 37 embodiment of measuring system of the present invention, shock surface arranges like this and is oriented in flow conditioner, make the basic xsect with flow conditioner of its part coplanar, and/or its part substantially and the xsect of measuring tube coplanar.
In the 7th development of the 37 embodiment of measuring system of the present invention, at least part of basic taper of shock surface.
In the 8th development of the 37 embodiment of measuring system of the present invention, shock surface is tapered towards measuring tube.
In the 9th development of the 37 embodiment of measuring system of the present invention, shock surface broadens towards the inlet end of flow conditioner.
In the tenth development of the 37 embodiment of measuring system of the present invention, shock surface and interior edge are at least part of by being shaped in the flow conditioner entrance side and forming towards the tapered inner cone of measuring tube, and this inner cone particularly extends to the inlet end of flow conditioner.
In the 11 development of the 37 embodiment of measuring system of the present invention, form the angle of the flank of inner cone of shock surface of flow conditioner greater than 45 °, particularly greater than 60 °.
In the 12 development of the 37 embodiment of measuring system of the present invention, form the angle of the flank of inner cone of shock surface of flow conditioner less than 90 °, particularly less than 88 °.
In the 13 development of the 37 embodiment of measuring system of the present invention, form the angle of the flank of inner cone of shock surface of flow conditioner greater than 60 ° and less than 88 °.
In the 38 embodiment of measuring system of the present invention, at least one charges into the guide surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this guide surface extends and is used for guiding at the mobile medium of flow conditioner along the direction of the endpiece of flow conditioner.
In the first development of the 38 embodiment of measuring system of the present invention, at least part of projection of guide surface of the particularly taper of flow conditioner.
In the second development of the 38 embodiment of measuring system of the present invention, the guide surface of the particularly taper of flow conditioner is at least part of recessed.
In the 3rd development of the 38 embodiment of measuring system of the present invention, the guide surface of flow conditioner has and substantially is the profile of S shape.
In the 4th development of the 38 embodiment of measuring system of the present invention, the guide surface of flow conditioner is tapered towards measuring tube.
In the 5th development of the 38 embodiment of measuring system of the present invention, the basic taper of the guide surface of flow conditioner is shaped.
In the 6th development of the 38 embodiment of measuring system of the present invention, guide surface and interior edge are at least part of to be formed by inner cone, the moulding and particularly towards the endpiece extension of flow conditioner in the entrance side of flow conditioner of this inner cone.
In the 7th development of the 38 embodiment of measuring system of the present invention, form the angle of the flank of inner cone of flow conditioner guide surface greater than 2 °, particularly greater than 4 °.
In the 8th development of the 38 embodiment of measuring system of the present invention, form the angle of the flank of inner cone of flow conditioner guide surface less than 45 °, particularly less than 10 °.
In the 9th development of the 38 embodiment of measuring system of the present invention, form the angle of the flank of inner cone of flow conditioner guide surface greater than 4 ° and less than 10 °.
In the 39 embodiment of measuring system of the present invention, at least one interior edge of charging into the flow conditioner inner chamber limits the shock surface of flow conditioner and the guide surface of flow conditioner, wherein the shock surface particularly Cyclic Rings that is arranged on flow conditioner around borderline region in and be used for its upper medium that flows of interception, guide surface extends and is used for guiding at the mobile medium of flow conditioner towards the endpiece of flow conditioner.
In the first development of the 39 embodiment of measuring system of the present invention, shock surface is by upwardly extending the first inner cone forms at flow conditioner entrance side internal shaping and in the side of its inlet end, and guide surface is by upwardly extending the second inner cone forms at flow conditioner entrance side internal shaping and in the side of its endpiece.
In the second development of the 39 embodiment of measuring system of the present invention, form the angle of the flank of the first inner cone of shock surface greater than the angle of the flank of the second inner cone that forms guide surface.
In the 3rd development of the 39 embodiment of measuring system of the present invention, form the angle of the flank of the first inner cone of shock surface of flow conditioner greater than 45 °, particularly greater than 60 °, and less than 90 °, particularly less than 88 °; And form the angle of the flank of the second inner cone of guide surface of flow conditioner greater than 2 °, particularly greater than 4 °, and less than 45 °, particularly less than 10 °.
In the 40 embodiment of measuring system of the present invention, at least one sensor element utilizes at least one piezoelectric element and/or utilizes at least one pressure-active element to form.
In the 41 embodiment of measuring system of the present invention, at least one sensor element is to utilize at least one movable coil corresponding with armature to form.
In the 42 embodiment of measuring system of the present invention, at least one sensor element is to utilize the potential electrode of medium mobile at least one contact measurement pipe and sensing current potential to form.
In the 43 embodiment of measuring system of the present invention, at least one sensor element is that the measurement electric capacity that utilizes at least one that the variation of measurand is reacted forms.
In the 44 embodiment of measuring system of the present invention, at least one sensor element utilizes at least one resistance to form.
In the 45 embodiment of measuring system of the present invention, the mechanical deformation that under the impact of the medium that at least one sensor element flows in measuring tube during operation, experience repeats.
In the 46 embodiment of measuring system of the present invention, repeatedly move with respect to static rest position under the impact of the medium that at least one sensor element flows in measuring tube during operation.
In the 47 embodiment of measuring system of the present invention, measurement translator comprises that at least one is arranged on the bluff body in measuring tube.
In the 48 embodiment of measuring system of the present invention, at least one of sensor device particularly at least part of sensor element of charging into measuring tube is arranged on the downstream of at least one bluff body.
In the 49 embodiment of measuring system of the present invention, measurement translator is the vortex flow transducer, particularly the flux of vortex street transducer.
In the 50 embodiment of measuring system of the present invention, measurement translator is the magnetically inductive cross-flow transducer.
In the 51 embodiment of measuring system of the present invention, measurement translator is the oscillating mode flow converter, particularly Ke Liaoli mass flow transducer, density converter and/or viscosity transducer.
In the 52 embodiment of measuring system of the present invention, measurement translator is the ultrasonic flow rate transducer.
In the first embodiment of method of the present invention, also comprise step: the ring-type whirlpool that the particularly home position of at least one basic static of also inducting in the entrance area of flow conditioner is fixing makes each the virtual maximum principal axis of inertia of at least two ring-type whirlpools overlap substantially each other.
In the second embodiment of method of the present invention, also comprise step: the shock surface that makes medium face toward flow conditioner flows, ring-type whirlpool with the basic static of inducting in the entrance area of flow conditioner, this shock surface is relative with flow media in the borderline region of flow conditioner, this borderline region particularly along the circumference of flow conditioner sealing ground around.
In the 3rd embodiment of method of the present invention, the step of ring-type whirlpool of at least one basic static of inducting in the entrance area of flow conditioner comprises: make MEDIA FLOW through charging into the flow conditioner interior edge of flow conditioner inner chamber, this interior edge particularly along the circumference closed-loop of flow conditioner around.
basic thought of the present invention is, the measuring accuracy of described categorical measures system not only by fluid is fully accelerated and thereby change favourable reynolds number range into and be improved, but also be improved in the following manner, namely, utilize on the one hand the flow conditioner placed before the actual measurement transducer and disturbance that basic elimination may be introduced in the measuring system upstream fluid (for example, the whirlpool that near tube wall borderline region moves with fluid), and utilize on the other hand flow conditioner to set the basic and flow pattern that for measuring principle can fully reproduce insensitive for disturbance for the medium that flows into measurement translator.This realizes by the whirlpool that produces at least one basic annular in its entrance area in measuring system of the present invention in particular, and this whirlpool keeps home position to fix at least in stable state.For the medium that flows through, in fact this fixing whirlpool shrinks as additional xsect, and thereby as " virtual " nozzle, it is formed on the inside of flow media inherently.
A special characteristics of this " virtual " nozzle is that it is substantially eliminated the disturbance that may induct and causes thus the in fact newly-generated substantially interference-free flow pattern in downstream in flowing before entrance area.The annular size of whirlpool and size and the intensity of the disturbance that intensity even adapts to generation, thus " virtual " nozzle that obtains like this is in fact as effective noise elimination but adaptive.
The present invention is based on following surprising discovery: utilize the flow obstacle place in the entrance area of measuring system can obtain the fixing whirlpool of static particularly home position, wherein flow obstacle work as the interference that limits in the borderline region of the inner chamber of MEDIA FLOW warp (the flow obstacle here be sharp-pointed as far as possible and as far as possible fully particularly circularly around interior edge).
Utilize the effect of " virtual " nozzle of annular vortex arising further to improve by following approach: in flow conditioner, upstream at the whirlpool that utilizes interior edge to produce causes another whirlpool, its equally as far as possible the position fix and may also be close to be positioned at the whirlpool that is produced by interior edge before.In the situation of flow conditioner of the present invention, this can realize by following approach in very simple mode: clearly cast the shock surface that is limited by interior edge, its particularly on circumference substantially equably around, make it react in the mode that is enough to form whirlpool the medium that flows on it as flow obstacle.
By forming two so annular whirlpools, concentrical annular whirlpool substantially each other particularly, thus can be captured in better on the one hand the whirlpool of companion in the medium of introducing and more effectively eliminate them; On the other hand, the common center whirlpool that utilizes two such orders to exist, the useful effect profile of " virtual " nozzle that forms so be similar to S shape substantially, even this is conducive to the very suitable follow-up measurement of formation and also reproducible flow pattern in wider range of application.By this way, although flow and to be interfered, still can carry the basic at least medium identical with the demarcation situation of flow pattern to measurement translator by flow conditioner in the supply section.
For example in the situation of above-mentioned whirlpool measurement instrument, use the advantage of flow conditioner of the present invention to be, although existence is than big difference between the bore of the bore of the process line that connects supply section and measuring tube, for example differ two nominal diameter grades, but stand good in measuring relatively slow mobile gas.
Description of drawings
Explain in detail with reference to the accompanying drawings now the present invention, in accompanying drawing:
Fig. 1 is the perspectivity side view for the measuring system of the mobile medium of process line;
Fig. 2, the 3rd, the eddy current measurement transducer, it is according to swirl principle work and be fit to be applied to the measuring system of Fig. 1; With
Fig. 4～8 schematically show the details of the measuring system of Fig. 1 with xsect.
Embodiment
Fig. 1 schematically illustrates measuring system, can modularization assembling if it needs, this measuring system is applicable to unusual robust ground and (for example measures the medium that flows in the process line that does not show, liquid, gas, steam etc.) at least one measurand, particularly mass rate m and/or volumetric flow rate v and/or flow velocity u and/or other flow parameters, and be used for this measurand is mapped at least one corresponding measured value X MFor this reason, measuring system comprises that at least one is used for the on-line measurement instrument of flow media.Measurement instrument utilizes suitable measurement translator 100 and the measurement electronic installation that electrically connects with it at least off and on forms.So the on-line measurement instrument is included in measurement translator 100 and the electronic device housing 200 that operating period flowed through by testing medium, hold with measurement translator 100 the measurement electronic installation that is electrically connected to (not having to introduce in detail) here in electronic device housing.
Measurement translator 100 comprises that at least one inserts the measuring tube of the process line particularly constitute pipeline, makes medium to be measured this measuring tube of flowing through at least off and in measuring system operating period.The on-line measurement instrument is especially for producing at least off and at least one measuring-signal, and this measuring-signal is by at least one physical parameter (particularly flow velocity, mass rate m, volumetric flow rate v, density p and/or viscosities il) impact of the medium that exists in measuring tube and suitably corresponding to measurand.The on-line measurement instrument be arranged on measuring tube and/or near sensor device for generation of at least one measuring-signal, this sensor device is reacted to the variation of at least one measurand of medium in the mode that affects suitably at least one measuring-signal at least indirectly.
In a preferred embodiment of the invention, measuring electronic installation further is implemented as and can pass through the upper measured value processing unit (for example programmable logic controller (PLC) (PLC), PC and/or workstation) of data transmission system (for example field bus system) and measuring system in measuring system operating period and exchange measurement data and/or other service datas, particularly at least one measured value X MBe attached to the situation of fieldbus or other communication systems for aforesaid measuring system, measure electronic installation and have corresponding communication interface, be used for data communication, for example be used for measurement data is sent to above-mentioned programmable logic controller (PLC) or upper Process Control System.For this reason, can also use for example standard interface of corresponding foundation in commercial measurement and automatic technology.In addition, external power source also can be connected to field bus system, and measuring system is directly provided energy in the manner described before via field bus system.
In the embodiment that here shows, vortex flowmeter is as the on-line measurement instrument, and it is applicable to measurement gas well, highly precisely detects the physical measurement variable of testing medium, particularly mass rate m, density p and/or viscosities il.Yet, in this case, in order to determine measurand, also can use other on-line measurement instrument of setting up equally in process automation, such as magnetic induction flowmeter, differential flowmeter, thermal energy flow meter, Ke Liao favourable flow counter, ultrasonic flowmeter etc.
Fig. 2 and 3 perspectivity synoptic chart have been described an embodiment according to the whirlpool measurement translator of swirl principle work, wherein, streamwise is seen (Fig. 2) and is seen (Fig. 3) along the direction opposite with flow direction, shown the measurement translator 1 that the part of vortex flowmeter is cut open in figure, it has whirlpool sensor 3, and this whirlpool sensor is fixed to tube wall 21 and the outstanding through hole 22 of measuring tube 2.This can be for example the dynamic compensation whirlpool sensor with capacitive sensor element, as described in US-A 60 03 384.
Place bluff body 4 in the inside of measuring tube 2 along diameter, it is connected with measuring tube 2 securely by the first restraint location 41 shown in forming and the second restraint location 41* of hiding.On the bus that is centered close to measuring tube 2 of the center in hole 22 and restraint location 41.
Bluff body 4 has shock surface 42, and measured medium (for example, liquid, gas or steam) flows facing to this shock surface during operation.Bluff body 4 also has two sides, wherein only have (front) side 43 in Fig. 2 and 3 as seen.Form two ribs that come off by shock surface 42 and side, wherein only can completely see one (front) rib 44 that comes off in Fig. 2, and (afterwards) come off that rib 45 is illustrated but do not show fully.
Basically, Fig. 2 and 3 bluff body 4 be shaped as straight triangular prism, that is, have the prism of triangular cross section.Yet the present invention also can adopt other Common Shape of bluff body.
Face toward shock surface 42 by medium and flow, form in a known way Karman vortex street in the downstream of bluff body 4, wherein, at each rib that comes off, the medium that whirlpool alternately comes off and flowed is carried secretly.Whirlpool produces local pressure fluctuation in flow media, its shedding frequence about the time is measuring of the so-called whirlpool frequency flow velocity that is medium and/or volumetric flow rate.
Utilize whirlpool sensor 3 that pressure surge is converted to whirlpool signal as electronic measurement signal, this whirlpool signal is fed to the measurement electronic installation (not shown) of holding in electronic device housing, measures electronic installation flow velocity and/or the volumetric flow rate of calculated example such as flow media thus.
In the hole 22 of whirlpool sensor 3 in the tube wall 21 of the downstream of bluff body 4 insertion measuring tube 2, and with the shell surface sealing of hole 22 with respect to measuring tube 2, whirlpool sensor 3 spirals are connected on tube wall 21 for this reason.For example use four bolts, wherein bolt 5,6,7 can be seen in Fig. 2 and 3, and the hole 50,60,70,80 that matches has been shown in Fig. 3 for this reason.
As illustrated in fig. 1 and 2, whirlpool sensor 3 comprises the wedge-like sensor wing 31 and casing cover 32, and the hole 22 that the sensor pterygoid process goes out to run through tube wall 21 enters the inside of measuring tube 2.Casing cover 32 ends at extension 322, has inserted the middleware 323 of thin-walled between casing cover 32 and extension 322, referring to above-mentioned US-A 60 03 384.
The sensor wing 31 has first type surface, wherein only can see first type surface 311 in Fig. 2 and 3.First type surface aligns with the bus of above-mentioned measuring tube 2 and forms front rib 313.The sensor wing 31 can also have other suitable spatial forms, and for example, it can have two parallel first type surfaces, and they form two parallel front ribs.
The sensor wing 31 is shorter than the diameter of measuring tube 2; Its bending resistance and have blind hole 314 (only in Fig. 4 as seen) more.In order to make blind hole 314 have enough diameters, wall part extends first type surface.Wall part shown in Fig. 2 315.Blind hole 314 reaches near front rib 313, and has there the bottom surface.
Whirlpool sensor 3 also has the barrier film 33 of coverage hole 22, and it has first surface 331 and the second surface 332 that deviates from medium towards medium, referring to Fig. 3 and 4.The sensor wing 31 is fixed to surface 331, and sensor element 36 is fixed to surface 332.Preferably, the sensor wing 31, barrier film 33, its ring edge 333 and sensor element 36 are fixed to the part 361 of barrier film 33 and are all made by the workpiece of a metal material, and metal material is stainless steel in particular.Sensor element 36 produces signal above-mentioned, and its frequency is directly proportional to the volumetric flow rate of flow media.
In measuring system of the present invention, the flow cross section A1 that is used for the particularly substantially straight measuring tube of guiding measured medium supplies the flow cross section of section 400 less than the process line that is connected to measuring system at entrance side.So measuring system also comprises flow conditioner 300, it is arranged on the entrance side of measuring tube and between measuring tube and process line supply section, and this flow conditioner has towards measuring tube 2 and is tapered and during operation by the inner chamber of MEDIA FLOW warp.Flow conditioner is larger than the flow cross section A1 of measuring tube towards the flow cross section a of the inlet end of process line supply section; And flow conditioner is less than the flow cross section of the inlet end of flow conditioner towards the flow cross section of the endpiece of measuring tube.In addition, flow conditioner has at least one interior edge K, and it is arranged on the upstream of endpiece and charges in the inner chamber of flow conditioner, particularly along the circumference of flow conditioner around and/or circulation.During operation, the medium that guides in flow conditioner flows facing to this interior edge K.
For the situation of MEDIA FLOW through flow conditioner, form the first whirlpool w1 basic annular and that home position is fixed in stable state at least in the downstream of interior edge K.Interior edge K forms like this and is arranged in flow conditioner, makes its substantially intersect with virtual longitudinal axis of flow conditioner and/or intersects with the virtual longitudinal axis of measuring tube.Further, interior edge particularly circularly around and thereby self-enclosed.In an embodiment who here shows, interior edge also be arranged on flow conditioner inlet end near, particularly its immediate.Owing to utilizing more sharp-pointed interior edge can realize particularly preferred result, thus in a preferred embodiment the rib radius of interior edge less than 2mm, particularly less than 0.6mm.
In the structure of the flow conditioner that here shows, before shock surface P, also form the second whirlpool w2 of basic annular except the first whirlpool w1, its equally at least in stable state home position fix, wherein shock surface by the interior edge of flow conditioner limit, be used for order impact medium on it eddy and be arranged on flow conditioner particularly circularly around borderline region; And two whirlpool w1, w2 two attach troops to a unit respectively and overlap substantially each other in the virtual inertia main shaft of the maximum moment of inertia of each whirlpool w1, w2.
Shock surface P arranges in flow conditioner like this and is directed, makes its at least part of virtual longitudinal axis that is basically perpendicular to flow conditioner extend, and/or its virtual longitudinal axis of partly being basically perpendicular to measuring tube extends.Because obvious shock surface helps to realize particularly preferred result, so in a preferred embodiment of the invention, shock surface height diametrically is at least 1mm.Shock surface P can for example form the anchor ring on basic plane; Can be perhaps also taper, be tapered and broaden towards process line towards measuring tube.
As what see in can Fig. 4, the interior edge K that produces whirlpool forms with intersecting of guide surface L by shock surface P, and wherein guide surface extends and is used for guiding at the mobile medium of flow conditioner along the direction of the endpiece of flow conditioner.Guide surface L is limited by interior edge K.As shown in Fig. 4～8, tapered guide surface L can for example form basic taper towards measuring tube, and particularly at least part of recessed and/or part is protruded, the outline line (Fig. 7) that for example therefore has basic S shape.
In the embodiment that here shows, in simple mode, the internal diameter of the inlet end by keeping flow conditioner is less than the bore of process line supply section, and forms shock surface P and thereby form interior edge K.
The method according to this invention is being measured operating period, makes medium flow out the supply section and enters flow conditioner.Due to the less flow cross section along the flow conditioner y direction, medium accelerates.Through interior edge K, form at least the first whirlpool w1 at the entrance area of flow conditioner in medium inside, and the maximum principal axis of inertia of whirlpool w1 overlaps substantially along with MEDIA FLOW with the longitudinal axis of flow conditioner and/or the longitudinal axis of measuring tube.For the medium of the whirlpool w1 that flows through, this causes that not only xsect further narrows down, and also causes and thereby Stable Manifold placed in the middle in the direction of guide surface L.
In situation about here showing, induct in the entrance area of the flow conditioner fixing annular whirlpool of particularly home position of another basic static at least, for this situation, occur effectively that additional xsect narrows down and thereby the further acceleration of fluid occurs.
Provide further preferred embodiment and the special development, the particularly advantageous size of tool of flow conditioner of the present invention below in conjunction with table 1,2, wherein:
The flow cross section of A1-measuring tube;
The flow cross section of the supply section of A2-process line;
The xsect ratio of the flow cross section A2 of the supply section of A2/A1-process line and the flow cross section A1 of measuring tube;
The xsect by the inner chamber of interior edge K constraint of a-flow conditioner;
A/A1-is by the shrinkage ratio of the flow cross section A1 of the xsect a of interior edge constraint and measuring tube;
Poor than between A2/A1 and shrinkage ratio a/A1 of A2/A1-a/A1-xsect;
The ratio of compression that a/A2-supplies the flow cross section A2 of section by xsect a and the process line of interior edge constraint;
Poor than between A2/A1 and ratio of compression a/A2 of A2/A1-a/A2-xsect;
The bore of D1-measuring tube;
The D2-process line is connected to the bore of the supply section of measuring system at entrance side;
The relative aperture of the bore D2 of D2/D1-process line supply section and the bore D1 of measuring tube;
The diameter by the xsect of the inner chamber of interior edge K constraint of d-flow conditioner;
The installation length of L1-measuring tube;
The installation length of L2-flow conditioner;
The interval of Lm-sensor element and measuring tube inlet end;
The pitch angle of the inner cone of α-formation flow conditioner shock surface (α=90 °-α ⊥); With
The pitch angle of the inner cone of β-formation flow conditioner guide surface.
Table 1:
Table 2:

Claims (63)

1. measuring system, for detection of at least one measurand of the medium that flows in process line, this measuring system comprises:
Measurement translator, this measurement translator has measuring tube and sensor device, sensor device has at least one sensor element of mainly reacting for measurand to be detected, described measuring tube is used for the guiding testing medium and its flow cross section is less than the flow cross section of the process line supply section that is connected to measuring system at entrance side, and described measurement translator utilizes at least one sensor element that at least one measuring-signal by the measurand impact is provided;
The measurement electronic installation of communicating by letter with measurement translator, this measurement electronic installation produces at least one instantaneous measured value that represents measurand at least off and on by using at least one measuring-signal; With
Flow conditioner, it is arranged on the entrance side of measuring tube, described flow conditioner is between measuring tube and process line supply section, and has the inner chamber that is tapered and is crossed by MEDIA FLOW in operation towards measuring tube, described flow conditioner is towards the flow cross section of the inlet end of the process line supply section flow cross section greater than measuring tube, and described flow conditioner towards the flow cross section of the endpiece of the measuring tube flow cross section less than the inlet end of flow conditioner;
Wherein, flow conditioner comprises at least one interior edge, this interior edge be arranged on flow conditioner endpiece the upstream and charge in the inner chamber of flow conditioner, the medium that guides in flow conditioner during operation flows facing to interior edge; And
Wherein, at least one charges into the edge radius of interior edge of flow conditioner inner chamber less than 2mm.
2. measuring system according to claim 1,
Wherein, at least one is charged into the interior edge of flow conditioner inner chamber and constructs like this and be arranged in flow conditioner, makes its basic virtual longitudinal axis with flow conditioner intersect;
Wherein, at least one is charged into the interior edge of flow conditioner inner chamber and constructs like this and be arranged in flow conditioner, makes its basic virtual longitudinal axis with measuring tube intersect; And/or
Wherein, at least one interior edge of charging into the flow conditioner inner chamber circularly around, and thereby self-enclosed; And/or
Wherein, at least one interior edge of charging into the flow conditioner inner chamber be arranged on flow conditioner inlet end near; And/or
Wherein, at least one charges into the inlet end next-door neighbour of interior edge and the flow conditioner of flow conditioner inner chamber; And/or
Wherein, flow conditioner is cylindrical shape at entrance area at least substantially; And/or
Wherein, flow conditioner is cylindrical shape at exit region at least substantially; And/or
Wherein, measuring tube is cylindrical shape at entrance area at least substantially; And/or
Wherein, measuring tube is straight substantially; And/or
Wherein, measuring tube is cylindrical shape substantially; And/or
Wherein, process line is pipeline; And/or
Wherein, the flow cross section of process line supply section keeps greater than 1.5 with the xsect ratio of the flow cross section of measuring tube; And/or
Wherein, the flow cross section of process line supply section keeps less than 10 with the xsect ratio of the flow cross section of measuring tube; And/or
Wherein, by the ratio of compression maintenance of the xsect of interior edge constraint and the flow cross section of measuring tube greater than 1.2; And/or
Wherein, by the ratio of compression maintenance of the xsect of interior edge constraint and the flow cross section of measuring tube less than 5.
3. measuring system according to claim 2,
Wherein, charge into the xsect of flow conditioner inner chamber of interior edge constraint of flow conditioner inner chamber less than the flow cross section of process line supply section by at least one; And/or
Wherein, be connected to the bore of process line supply section of measuring system at entrance side little for the relative aperture of measuring tube; And/or
Wherein, the installation length of measuring tube is greater than the installation length of flow conditioner, the installation length that makes flow conditioner with the installation length of the installation length of measuring tube than keeping less than 1; And/or
Wherein, the inlet end of at least one sensor element and measuring tube is arranged in measuring tube at a distance of a distance; And/or
Wherein, at least one charges into the shock surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this shock surface is arranged in the borderline region of flow conditioner; And/or
Wherein, at least one charges into the guide surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this guide surface extends and is used for guiding at the mobile medium of flow conditioner along the direction of the endpiece of flow conditioner; And/or
Wherein, at least one charges into the inlet end setting of the interior edge next-door neighbour flow conditioner of flow conditioner inner chamber; And/or
Wherein, at least one interior edge of charging into the flow conditioner inner chamber along the circumference of flow conditioner around; And/or
Wherein, at least one charges into the edge radius of interior edge of flow conditioner inner chamber less than 0.6mm.
4. measuring system according to claim 3, wherein, at least one sensor element immerses medium during operation; And/or wherein, at least one sensor element is set directly on measuring tube.
5. measuring system according to claim 1 wherein, is charged into the xsect of flow conditioner inner chamber of interior edge constraint of flow conditioner inner chamber less than the flow cross section of process line supply section by at least one.
6. measuring system according to claim 5,
Wherein, by the shrinkage ratio maintenance of the xsect of interior edge constraint and the flow cross section of process line supply section less than 0.9; And/or
Wherein, by the shrinkage ratio maintenance of the xsect of interior edge constraint and the flow cross section of process line supply section greater than 0.1.
7. measuring system according to claim 6, wherein the flow cross section of process line supply section with the xsect of the flow cross section of measuring tube than keeping greater than 1.5 and/or less than 10.
8. measuring system according to claim 7,
Wherein, the poor maintenance greater than 0.5 between xsect ratio and shrinkage ratio; And/or
Wherein, the poor maintenance less than 10 between xsect ratio and shrinkage ratio.
9. measuring system according to claim 1,
Wherein, by the ratio of compression maintenance of the xsect of interior edge constraint and the flow cross section of measuring tube greater than 1.2; And/or
Wherein, by the ratio of compression maintenance of the xsect of interior edge constraint and the flow cross section of measuring tube less than 5.
10. measuring system according to claim 9, wherein the flow cross section of process line supply section with the xsect of the flow cross section of measuring tube than keeping greater than 1.5 and/or less than 10.
11. measuring system according to claim 10,
Wherein, the poor maintenance greater than 0.2 between xsect ratio and ratio of compression; And/or
Wherein, the poor maintenance less than 10 between xsect ratio and ratio of compression.
12. measuring system according to claim 1, wherein, the relative aperture of measuring tube is connected to measuring system at entrance side the bore of process line supply section is little.
13. measuring system according to claim 12,
Wherein, the bore towards the relative aperture measuring tube of the inlet end of process line supply section of flow conditioner is large, and the bore towards the inlet end of the relative aperture flow conditioner of the endpiece of measuring tube of flow conditioner is little; And/or
Wherein, at least one interior edge of charging into the flow conditioner inner chamber forms like this, makes the internal diameter maintenance of the inlet end of flow conditioner supply the bore of section less than process line; And/or
Wherein, the relative aperture of the bore of the bore of process line supply section and measuring tube keeps greater than 1.1; And/or
Wherein, the relative aperture of the bore of the bore of process line supply section and measuring tube keeps less than 5; And/or
Wherein, charge into the diameter of xsect of flow conditioner inner chamber of interior edge constraint of flow conditioner inner chamber by at least one less than the bore of process line supply section.
14. measuring system according to claim 1, wherein, the installation length of measuring tube is greater than the installation length of flow conditioner, the installation length that makes flow conditioner with the installation length of the installation length of measuring tube than keeping less than 1.
15. measuring system according to claim 14, wherein, the bore of process line supply section and the relative aperture of the bore of measuring tube are corresponding at least 10% of the installation length ratio of the installation length of flow conditioner and the installation length of measuring tube.
16. measuring system according to claim 15, wherein, the relative aperture of the bore of process line supply section and the bore of measuring tube keeps greater than 1.1 and/or less than 5.
17. measuring system according to claim 1, wherein, the inlet end of at least one sensor element and measuring tube is arranged in measuring tube at a distance of a distance, makes described distance and the ratio of the bore of measuring tube keep greater than 1.
18. measuring system according to claim 17,
Wherein, at least one sensor element immerses medium during operation; And/or
Wherein, at least one sensor element is set directly on measuring tube.
19. measuring system according to claim 1, wherein, at least one charges into the shock surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this shock surface is arranged in the borderline region of flow conditioner.
20. measuring system according to claim 19,
Wherein, shock surface arranges like this and is oriented in flow conditioner, makes its at least part of virtual longitudinal axis that is basically perpendicular to flow conditioner extend; And/or
Wherein, shock surface arranges like this and is oriented in flow conditioner, makes its at least part of virtual longitudinal axis that is basically perpendicular to measuring tube extend; And/or
Wherein, shock surface height diametrically is at least 1mm; And/or
Wherein, shock surface forms annular surface; And/or
Wherein, at least part of convex shoulder by being shaped in the flow conditioner entrance side of shock surface and interior edge forms; And/or
Wherein, shock surface is at least part of is substantially the plane; And/or
Wherein, shock surface arranges like this and is oriented in flow conditioner, makes that its part is basic and xsect flow conditioner is coplanar; And/or
Wherein, at least part of basic taper of shock surface; And/or
Wherein, shock surface is tapered towards measuring tube; And/or
Wherein, shock surface broadens towards the inlet end of flow conditioner; And/or
Wherein, the shock surface of flow conditioner is arranged in the annular boundary zone of flow conditioner.
21. measuring system according to claim 19, wherein, at least part of annular by being shaped in the flow conditioner entrance side and/or the self-enclosed convex shoulder of shock surface and interior edge forms.
22. measuring system according to claim 21, wherein, at least part of inner cone by being shaped in the flow conditioner entrance side of shock surface and interior edge forms.
23. measuring system according to claim 22,
Wherein, the angle of the flank of the inner cone of the shock surface of formation flow conditioner is greater than 45 °; And/or
Wherein, the angle of the flank of the inner cone of the shock surface of formation flow conditioner is less than 90 °; And/or
Wherein, inner cone extends to the inlet end of flow conditioner and is tapered towards measuring tube.
24. measuring system according to claim 19, wherein, at least part of inner cone by being shaped in the flow conditioner entrance side of shock surface and interior edge forms.
25. measuring system according to claim 24, wherein, inner cone extends to the inlet end of flow conditioner and is tapered towards measuring tube.
26. measuring system according to claim 1, wherein, at least one charges into the guide surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this guide surface extends and is used for guiding at the mobile medium of flow conditioner along the direction of the endpiece of flow conditioner.
27. measuring system according to claim 26,
Wherein, at least part of projection of the guide surface of flow conditioner; And/or
Wherein, the guide surface of flow conditioner is at least part of recessed; And/or
Wherein, the guide surface of flow conditioner is tapered towards measuring tube; And/or
Wherein, at least part of inner cone by moulding in the entrance side of flow conditioner of guide surface and interior edge forms.
28. measuring system according to claim 27,
Wherein, the angle of the flank of the inner cone of formation flow conditioner guide surface is greater than 2 °; And/or
Wherein, the angle of the flank of the inner cone of formation flow conditioner guide surface is less than 45 °; And/or
Wherein, at least part of taper of the guide surface of flow conditioner is shaped; And/or
Wherein, the inner cone of at least part of endpiece by extending to flow conditioner of guide surface and interior edge forms.
29. measuring system according to claim 19, wherein, shock surface is by upwardly extending the first inner cone forms at flow conditioner entrance side internal shaping and in the side of flow conditioner inlet end, and guide surface is by upwardly extending the second inner cone forms at flow conditioner entrance side internal shaping and in the side of flow conditioner endpiece.
30. measuring system according to claim 29,
Wherein, the angle of the flank of the first inner cone of formation shock surface is greater than the angle of the flank of the second inner cone that forms guide surface; And/or
Wherein, the angle of the flank of the first inner cone of the shock surface of formation flow conditioner is greater than 45 ° and less than 90 °; And wherein form the angle of the flank of the second inner cone of guide surface of flow conditioner greater than 2 ° and less than 45 °.
31. measuring system according to claim 1,
Wherein, at least one sensor element satisfies one of the following:
At least one sensor element utilizes at least one piezoelectric element to form,
At least one sensor element utilizes at least one pressure-active element to form,
At least one sensor element is to utilize at least one movable coil corresponding with armature to form,
At least one sensor element is to utilize the potential electrode of medium mobile at least one contact measurement pipe and sensing current potential to form,
At least one sensor element is that the measurement electric capacity that utilizes at least one that the variation of measurand is reacted forms,
At least one sensor element utilizes at least one resistance to form,
The mechanical deformation that under the impact of the medium that at least one sensor element flows in measuring tube during operation, experience repeats,
Repeatedly move with respect to static rest position under the impact of the medium that at least one sensor element flows in measuring tube during operation; And/or
Wherein, measurement translator comprises that at least one is arranged on the bluff body in measuring tube; And/or
Wherein, at least one measured value that is produced by described measurement electronic installation is selected from following group: mass flow measurement, volume flow measurement value, density measurement, viscosity measurement value, pressure measuring value, measured temperature.
32. measuring system according to claim 1, wherein, measurement translator comprises that at least one is arranged on the bluff body in measuring tube, and at least one sensor element of sensor device is arranged on the downstream of at least one bluff body.
33. measuring system according to claim 1, wherein, measurement translator is selected from following converter groups: the vortex flow transducer; The magnetically inductive cross-flow transducer; The oscillating mode flow converter.
34. measuring system according to claim 23,
Wherein, the angle of the flank of the inner cone of the shock surface of formation flow conditioner is greater than 60 °; And/or
Wherein, the angle of the flank of the inner cone of the shock surface of formation flow conditioner is less than 88 °.
35. measuring system according to claim 28,
Wherein, the angle of the flank of the inner cone of formation flow conditioner guide surface is greater than 4 °; And/or
Wherein, the angle of the flank of the inner cone of formation flow conditioner guide surface is less than 10 °.
36. measuring system according to claim 30,
Wherein, the angle of the flank of the first inner cone of the shock surface of formation flow conditioner is greater than 60 ° and/or less than 88 °; And wherein form the angle of the flank of the second inner cone of guide surface of flow conditioner greater than 4 ° and/or less than 10 °.
37. measuring system according to claim 32 wherein, makes at least part of the charging in measuring tube of at least one sensor element of sensor device.
38. measuring system according to claim 2, wherein, the flow cross section of process line supply section and the xsect of the flow cross section of measuring tube are than remaining in 1.66～9.6 scope.
39. measuring system according to claim 2 wherein, is remained on by the ratio of compression of the flow cross section of the xsect of described interior edge constraint and measuring tube in 1.3～3 scope.
40. measuring system according to claim 6 wherein, is remained on by the shrinkage ratio of the flow cross section of the xsect of described interior edge constraint and process line supply section in 0.25～0.85 scope.
41. measuring system according to claim 7, wherein the xsect of the flow cross section of process line supply section and the flow cross section of measuring tube is than remaining in 1.66～9.6 scope.
42. measuring system according to claim 8, wherein, the poor maintenance greater than 0.83 and less than 9.5 between xsect ratio and shrinkage ratio.
43. measuring system according to claim 9 wherein, is remained on by the ratio of compression of the flow cross section of the xsect of interior edge constraint and measuring tube in 1.3～3 scope.
44. measuring system according to claim 10, wherein the xsect of the flow cross section of process line supply section and the flow cross section of measuring tube is than remaining in 1.66～9.6 scope.
45. measuring system according to claim 11, wherein, xsect than and ratio of compression between difference remain in 0.25～8 scope.
46. measuring system according to claim 13, wherein, the relative aperture of the bore of process line supply section and the bore of measuring tube remains in 1.2～3.1 scope.
47. measuring system according to claim 16, wherein, the relative aperture of the bore of process line supply section and the bore of measuring tube remains in 1.2～3.1 scope.
48. measuring system according to claim 23, wherein, the angle of the flank of the inner cone of the shock surface of formation flow conditioner is greater than 60 ° and less than 88 °.
49. measuring system according to claim 28, wherein, the angle of the flank of the inner cone of formation flow conditioner guide surface is greater than 4 ° and less than 10 °.
50. measuring system according to claim 27, wherein, the guide surface of flow conditioner has the basic outline line of S shape that is.
51. measuring system according to claim 27, wherein, the basic taper of the guide surface of flow conditioner is shaped.
52. measuring system according to claim 2,
Wherein, charge into the xsect of flow conditioner inner chamber of interior edge constraint of flow conditioner inner chamber less than the flow cross section of process line supply section by at least one; And/or
Wherein, be connected to the bore of process line supply section of measuring system at entrance side little for the relative aperture of measuring tube; And/or
Wherein, the installation length of measuring tube is greater than the installation length of flow conditioner, the installation length that makes flow conditioner with the installation length of the installation length of measuring tube than keeping less than 1; And/or
Wherein, the inlet end of at least one sensor element and measuring tube is arranged on measuring tube at a distance of a distance; And/or
Wherein, at least one charges into the shock surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this shock surface is arranged in the borderline region of flow conditioner; And/or
Wherein, at least one charges into the guide surface of the interior edge restriction flow conditioner of flow conditioner inner chamber, and this guide surface extends and is used for guiding at the mobile medium of flow conditioner along the direction of the endpiece of flow conditioner; And/or
Wherein, at least one charges into the inlet end setting of the interior edge next-door neighbour flow conditioner of flow conditioner inner chamber; And/or
Wherein, at least one interior edge of charging into the flow conditioner inner chamber along the circumference of flow conditioner around; And/or
Wherein, at least one charges into the edge radius of interior edge of flow conditioner inner chamber less than 0.6mm.
53. measuring system according to claim 1, wherein, the inlet end of at least one sensor element and measuring tube is arranged on measuring tube at a distance of a distance, makes described distance and the ratio of the bore of measuring tube keep greater than 1.
54. the application of the measuring system of aforementioned arbitrary claim is for detection of at least one measurand of the medium that flows in process line.
55. the application of 4 described measuring systems according to claim 5, described at least one measurand is selected from following group: mass rate, volumetric flow rate, flow velocity, density, viscosity, pressure, temperature.
56. be used for utilizing the method for at least one measurand of the medium that flows in the measuring system testing process pipeline of insertion process pipeline, this measuring system has the flow conditioner that is connected to process line supply section and the measurement translator that is connected to flow conditioner, and the method comprises the following steps:
Make testing medium flow into flow conditioner from the supply section;
Direction along the virtual longitudinal axis of flow conditioner is accelerated flow media, and the ring-type whirlpool of at least one basic static of inducting in the medium that flows in the entrance area of flow conditioner makes the maximum principal axis of inertia of this at least one ring-type whirlpool substantially overlap with the virtual longitudinal axis of flow conditioner and/or the virtual longitudinal axis of measuring tube;
Make testing medium flow through at least one ring-type whirlpool, and make testing medium flow out flow conditioner, enter the measuring tube of the measurement translator that connects; And
By the sensor element that uses at least one mainly the variation of measurand and/or measurand to be reacted, produce at least one by the measuring-signal of measurand impact to be detected.
57. 6 described methods according to claim 5, at least one in further comprising the steps of:
Also induct in the entrance area of the flow conditioner ring-type whirlpool of at least one basic static makes each the maximum principal axis of inertia of at least two ring-type whirlpools overlap substantially each other;
The shock surface that makes medium face toward flow conditioner flows, and with the ring-type whirlpool of the basic static of inducting in the entrance area of flow conditioner, this shock surface is relative with flow media in the borderline region of flow conditioner; And
Make MEDIA FLOW through charge into the flow conditioner inner chamber around interior edge.
58. 7 described methods according to claim 5, also comprise step: the shock surface that makes medium face toward flow conditioner flows, ring-type whirlpool with the basic static of inducting in the entrance area of flow conditioner, this shock surface is relative with flow media in the borderline region of flow conditioner, this borderline region along the circumference of flow conditioner sealing ground around.
59. 6 described methods according to claim 5, at least one in further comprising the steps of:
The fixing ring-type whirlpool of at least one home position of also inducting in the entrance area of flow conditioner makes each the maximum principal axis of inertia of at least two ring-type whirlpools overlap substantially each other;
The shock surface that makes medium face toward flow conditioner flows, and this shock surface is relative with flow media in the borderline region of flow conditioner, this borderline region along the circumference sealing ground of flow conditioner around.
60. 9 described methods according to claim 5 also comprise step: make MEDIA FLOW through charge into the flow conditioner inner chamber around interior edge.
61. 6 described methods according to claim 5, also comprise step: the ring-type whirlpool of at least one basic static of also inducting in the entrance area of flow conditioner, make each the maximum principal axis of inertia of at least two ring-type whirlpools overlap substantially each other, the step of the ring-type whirlpool of wherein said at least one basic static of also inducting in the entrance area of flow conditioner comprises: make MEDIA FLOW through charge into the flow conditioner inner chamber around interior edge.
62. 1 described method according to claim 6,
Wherein, the interior edge of charging into the flow conditioner inner chamber along the circumference sealing ground of flow conditioner around; And/or wherein ring-type whirlpool home position in the entrance area of flow conditioner of at least one basic static fix.
63. 6 described methods according to claim 5,
The ring-type whirlpool of at least one basic static of inducting in the medium that wherein, flows in the entrance area of flow conditioner is fixed at the inner home position of the described entrance area of flow conditioner; And/or wherein at least one measurand select from following group: mass rate, volumetric flow rate, flow velocity, density, viscosity, pressure, temperature.
CN200780032581.5A 2006-07-21 2007-07-19 Measuring system for a medium flowing in a process line Active CN101553714B (en)

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DE102006034296.8 2006-07-21
DE200610034296 DE102006034296A1 (en) 2006-07-21 2006-07-21 Measuring system for detecting measured variable, particularly mass flow, volume flow, flow rate, density, viscosity, has measuring sensor, with particularly straight measuring tube, which serves to guide medium which is to be measured
DE102006047815A DE102006047815A1 (en) 2006-10-06 2006-10-06 Measuring system e.g. magnetic-inductive flow measuring system, for detecting measurement variable e.g. mass flow of medium, has flow conditioner with inner edge that is provided upstream of outlet end of conditioner and projects into lumen
DE102006047815.0 2006-10-06
PCT/EP2007/057468 WO2008009720A2 (en) 2006-07-21 2007-07-19 Measuring system for a medium flowing in a process line

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