CN106323392A - An anti-interference measuring pipe segment of an ultrasonic flow sensor - Google Patents
An anti-interference measuring pipe segment of an ultrasonic flow sensor Download PDFInfo
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- CN106323392A CN106323392A CN201510348554.5A CN201510348554A CN106323392A CN 106323392 A CN106323392 A CN 106323392A CN 201510348554 A CN201510348554 A CN 201510348554A CN 106323392 A CN106323392 A CN 106323392A
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Abstract
The invention provides an anti-interference measuring pipe segment of an ultrasonic flow sensor. The measuring pipe segment consists of a flat straight pipe segment in the middle and trumpet-shaped connecting pipe segments on the two ends of the flat straight pipe segment. The two ends of the flat straight pipe segment are in arc-shaped transition connection with the trumpet-shaped connecting pipe segments; at least one group of ultrasonic transducer sets of even pairs are arranged on the flat straight pipe segment, and the center lines of the even pairs of ultrasonic transducer sets intersect with each other. The ultrasonic transducer sets effectively eliminate component velocity interference perpendicular to a fluid flowing direction in ultrasonic tests; since the section area of the flat straight pipe segment is reduced compared with the area of an opening of a meter body, the ratio of an effective sampling section of each ultrasonic transducer is increased, and the eccentric flow and rotary flow in all directions of fluid entering the trumpet-shaped connecting pipe segments are forcibly adjusted, so that the anti-interference capability is improved. The anti-interference measuring pipe segment of an ultrasonic flow sensor has the advantages of novel structure, excellent the anti-interference performance, adaption to various kinds of complicated working conditions, convenient installation, accurate fluid flow velocity measurement and measuring precision improvement.
Description
Technical field
The present invention relates to fluid metering utensil, the measurement pipeline section of a kind of jamproof ultrasonic flow transducer.
Background technology
At present, in terms of based on the flow measurement that ultrasound wave is carrier, mainly it is placed on the two ends of tested pipeline by a pair or multipair ultrasonic transducer to realize, ultrasonic flow sensor is the principle utilizing ultrasound wave to propagate in a liquid, by recording sound wave forward, reverse propagation speed differential and calculate the flow velocity of fluid, calculate flow by being integrated in integral formula in PCB chip again, above-mentioned is the ideal situation of stabilized fluid, but during the actual application of effusion meter, complex situations because of effusion meter front end, if any bend pipe, reducing, valve, heat exchanger, the impact of water knockout drum etc., it is difficult to obtain metastable perfect fluid and passes through effusion meter, unstable fluid makes the accuracy of the data of measurement be affected.In order to eliminate the effects of the act, obtaining metastable fluid, have installs flow straightener in the porch of sensor, but it is the least to be because being affected played current stabilization effect by table body length；Some measure in pipeline carry out undergauge, for the flowing of radial rotary, steady flow result is the most inconspicuous.
It addition, during the use of various instrument, it will usually filter is installed in the front end of instrument; to prevent impurity interferometry in fluid; also it is in order at the protection to whole pipeline simultaneously, but the fluidised form of water can change after installing filter, thus cause certainty of measurement to decline.Therefore, common flow-meter keeps the straight length of 10 times of instrument nominal aperture length before being desirable that table, to reduce the front-end devices impact on flow measurement.
Conventional fluid is in system is run, pipeline specific frictional resistance increases with flow velocity and increases, operation in view of whole system, liquid economic velocity is below 2m/s, latus rectum instrument optimum measurement region is rate of flow of fluid 0.5m/s-8m/s(even more than 10m/s), and the flow velocity of common 0.1m/s-0.7m/s is positioned at the sub-precise area of instrument in actual condition, optimum measurement scope differs bigger with actually used range of flow.
Summary of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, it is provided that a kind of novel structure, interference free performance are excellent, can realize the various complex working conditions of adaptation, conveniently install, accurately measure the measurement pipeline section of the ultrasonic flow transducer of rate of flow of fluid, raising certainty of measurement.
The technical solution adopted for the present invention to solve the technical problems is:
nullA kind of measurement pipeline section of jamproof ultrasonic flow transducer，It is characterized in that described measurement pipeline section is made up of the tubaeform connection pipeline section of middle flat straight length and flat straight length two ends，Described flat straight length two ends connect with the tubaeform pipeline section arc-shaped transition that is connected，The ultrasonic transducer group intersected at least provided with one group of even-even and this group even-even centrage on described flat straight length，The component velocity interference being perpendicular to fluid flow direction when can effectively eliminate ultrasonic testing by ultrasonic transducer group，Owing to flat straight length sectional area diminishes relative to table body aperture area，The efficiently sampling cross section accounting making the ultrasonic transducer of even-even increases，And force to adjust eccentric flowing and the rotational flow of fluid entrance flared structure all directions，Enhance capacity of resisting disturbance，Solve in the flow transducer of round mouth shape，Need that more transducer is installed and gather more fully signal data，Just can accurately eliminate the substantive deficiency of the interference of special disturbance means as this in heat exchanger.
Adjacent ultrasonic transducer group in the present invention may be provided in the same rip cutting aspect of flat straight length, can also be arranged in the different rip cutting aspects of flat straight length, the most described ultrasonic transducer group rip cutting basal spacing is less than 30mm, it is beneficial to the sampling of ultrasonic transducer group by mating two-by-two, carry out data process, offset the interference of unstable current.Can arrange according to pipeline section bore and organize transducer group more, different transducer group distances can be 100mm-400mm, various combination be smaller than 100 mm, then increase the consumption of transducer, raising cost also increases the fault rate of transducer；Through actual measurement, the spacing of various combination then can not effectively reflect some special flow regimes of gauge internal more than 400mm, cause the reduction of accuracy.
The upper plane of flat straight length of the present invention and the spacing of lower plane are the 25%-90% of two sides spacing, and the two sides of described flat straight length can be plane, it is also possible to for arcwall face；Be have adjusted the interval of most preferably testing the speed of instrument by flat straight length, make instrument more conform to the application operating mode of reality；On the one hand combination due to flat straight tube and transducer group reduces the configuration quantity of transducer, and on the one hand reduce flat chamber reduces ratio, has reached the perfectly balanced of control manufacturing cost (a small amount of transducer) and use cost (low pressure loss).
The present invention is in use, typically need not straight length before table, when having the abnormal interference parts of extreme such as half-open valve before table, the most only need the straight length of 3 times of instrument nominal aperture length, precision and the accuracy measured can be ensured, also can add flange or screw thread at the two ends of this structure, form the table body of instrument, then coordinate installation transducer and electric elements composition ultrasonic flow sensor.
After Standard fluid flows through specific criteria disturbance means, again pass through the straight length of 10 times of instrument nominal aperture length laggard enter ultrasonic flow sensor, the accuracy of measurement error of ultrasonic flow sensor cannot be greater than 2 times of the normal service condition limits of error.Fluid of the present invention is directly entered the measurement pipeline section of the present invention after flowing through the interference sources such as standard disturbance means, bend pipe, continuous bend pipe, reducer pipe, water knockout drum, valve, measure flow accuracy and meet nominal error limit requirement；Fluid is directly entered the measurement pipeline section of the present invention after flowing through the special interference sources such as choke block, heat exchanger, plugged sereen, measure flow accuracy and disclosure satisfy that 2 times of requirements that nominal error limits；After fluid flows through the special interference sources such as choke block, valve, heat exchanger, filter, the straight length flowing through 3 times of instrument nominal aperture length enters the measurement pipeline section of the present invention, and the accuracy of measurement error measuring pipeline section of the present invention can also meet the requirement of nominal error limit.It is significantly better than the capacity of resisting disturbance of common flow measurement instrument.
The invention has the beneficial effects as follows: use flat straight length owing to measuring pipeline section, the imperfect flow causing front interference source serves good Accommodation, and by the layout of the transducer of even-even, make sampled signal data the most disposable, during process, only need to be by average for each two correspondence sound channel signal numerical value, just can effectively eliminate the interference of the irregular flowing that flat straight length cannot be completely eliminated, there is novel structure, interference free performance is excellent, can realize adapting to various complex working conditions, convenient installation, accurately measure rate of flow of fluid, improve the advantages such as certainty of measurement.
Accompanying drawing explanation
Fig. 1 is the one 2 sound channel cast tube segment structure schematic diagram of the present invention.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the another kind 4 sound channel welded pipe segment structure schematic diagram of the present invention.
Fig. 4 is the sectional view of Fig. 2.
Fig. 5 standard verification requires the limits of error
Fig. 6 is the test tables of data of the present invention.
Reference: flat straight length 1, tubaeform connecting tube 2, ultrasonic transducer 3-1,3-2,6-1,6-2,6-3,6-4, upper plane (upper steel plate) 4, lower plane (lower steel plate) 5, pipe 9.
Detailed description of the invention:
Below in conjunction with the accompanying drawings the structure of the present invention is further described:
nullAs shown in Figure 1，A kind of measurement pipeline section of jamproof ultrasonic flow transducer，It is characterized in that described measurement pipeline section is made up of the tubaeform connecting tube 2 sections of middle flat straight length 1 and flat straight length 1 two ends，Described flat straight length 1 two ends connect with tubaeform pipeline section 2 arc-shaped transition that is connected，Even-even ultrasonic transducer group 3-1 intersected at least provided with a group switching centre line on described flat straight length 1、3-2，Ultrasonic transducer group 3-1、The component velocity interference being perpendicular to fluid flow direction when 3-2 has effectively eliminated ultrasonic testing，Owing to flat straight length sectional area diminishes relative to table body aperture area，Make the ultrasonic transducer 3-1 of even-even、The efficiently sampling cross section accounting of 3-2 increases，And force to be adjusted into eccentric streaming flow and the rotational flow fluid of tubaeform connecting tube 2 all directions，Enhance capacity of resisting disturbance，Solve in circular latus rectum flow transducer，Need that more transducer is installed and gather more fully signal data，Just can accurately eliminate the substantive deficiency of the interference of special disturbance means as this in heat exchanger，Described every pair of ultrasonic transducer is that two ultrasonic transducers of the same centrage by flat straight length both sides are constituted，This is prior art.
Adjacent ultrasonic transducer group 6-1 in the present invention, 6-2 or 6-3,6-4 may be provided in the same rip cutting aspect of flat straight length 1, as shown in Figure 3；Can also be arranged in the different rip cutting aspects of flat straight length, the rip cutting basal spacing of the most described ultrasonic transducer group 6-1 and 6-2 and 6-3 and 6-4 is less than 30mm, as shown in Figure 4, it is beneficial to the sampling of ultrasonic transducer group by mating two-by-two, carry out data process, offset the interference of unstable fluid flowing.
The upper plane 4 of flat straight length 1 of the present invention and the spacing of lower plane 5 are the 25%-90% of two sides spacing, and the two sides of described flat straight length 1 can be plane, it is also possible to for arcwall face；Be have adjusted the interval of most preferably testing the speed of instrument by flat straight length, make instrument more conform to the application operating mode of reality；On the one hand combination due to flat straight tube and transducer group reduces the configuration quantity of transducer, and on the one hand reduce flat chamber reduces ratio, has reached the perfectly balanced of control manufacturing cost (a small amount of transducer) and use cost (low pressure loss).
The present invention is in use, typically need not straight length before table, when having the abnormal interference parts of extreme such as half-open valve before table, the most only need the straight length of 3 times of instrument nominal aperture length, precision and the accuracy measured can be ensured, also can add flange or screw thread at this pipeline section two ends, form the table body of instrument, then coordinate installation transducer and electric elements composition ultrasonic flow sensor.
The present invention is when making, can be manufactured by casting, described flat straight length 2 and tubaeform connecting tube 2 rounding off measuring pipeline section two ends, ultrasonic transducer 3-1,3-2 are distributed in flat straight length two sides in pairs, the installation site of ultrasonic transducer 3-1,3-2 is distributed in pairs, and two pairs of transducers 3-1,3-2 installation site are in the same rip cutting aspect of flat straight length, also may be installed spacing to be less than in two parallel rip cutting aspects of 30mm, the rip cutting basal spacing of the most described ultrasonic transducer group 6-1 and 6-2 and 6-3 and 6-4 is less than 30mm；On described flat straight length 1, the spacing of plane 4 and lower plane 5 is the 25%-90% of flat straight length two sides spacing, reach artificail commutation, strengthen the speed of detected fluid, the purpose of minimizing transducer installation number, the quantity of transducer correspondence installation site is selected according to the height dimension measuring pipeline section, the i.e. chamber height of flat straight length 1 often increases 100mm-400mm, it is increased by two ultrasonic transducers to correspondence, to play the effect that various complex working conditions reduce the cost again of effectively measuring.On the one hand reduce the configuration quantity of transducer, on the one hand reduce the ratio that reduces in flat chamber, reduce instrument crushing, reach the perfectly balanced of control manufacturing cost (a small amount of transducer) and use cost (low pressure loss).
As shown in accompanying drawing 3, accompanying drawing 4, the present invention is not limited to casting technique, may be used without Plate Welding to form: in pipe 9 and pipe 9, upper steel plate 4 and the lower steel plate 5 of welding constitute flat straight length 1 and tubaeform connecting tube 2, the height of described upper steel plate 4 and lower steel plate 5 is the 25%-90% of pipe 9 internal diameter, and the selection of concrete numerical value depends on that the present invention is for the class of accuracy of instrument, the size of the pressure loss and the demand of application operating mode；The rip cutting aspect of two pairs of ultrasonic transducer groups 6-1 of the first combination of flat straight length 1, the rip cutting basal spacing of 6-2 are less than 30mm, the rip cutting aspect of two pairs of transducers 6-3 of the second combination of flat straight length 1, the rip cutting basal spacing of 6-4 are less than 30mm, two couple of one combination corresponding transducer 6-1,6-2 or 6-3,6-4 place aspect difference do not surpass 30mm spacing, could effectively reflect and eliminate the interference signal on fluid flow direction；Combination one can be 100mm-400mm with the transducer installation site distance of combination two, various combination be smaller than 100 mm, then increase the consumption of transducer, raising cost also increases the fault rate of transducer；Through actual measurement, the spacing of various combination then can not effectively reflect some special flow regimes of gauge internal more than 400mm, cause the reduction of accuracy.When instrument bore then must use more than three groups transducer group more than 800mm.
Pipeline section test verification method is measured: the pipeline section two ends of the present invention are added flange with the present invention, in transducer installation site, transducer composition flow transducer is installed, coordinate computer composition ultrasonic meter, on the testboard meet touchstone, after assay approval, (standard verification requires the limits of error, Fig. 5), record measurement error, installs this ultrasonic meter and carries out under the complex working condition that various interference sources produce testing the test of flow accuracy；As shown in Figure 6, being shown by the test data of the present invention, the present invention examines and determine after being directly connected on common various interference sources, has all reached the requirement of 2 grades of Watch Errors；After the extremely complicated interference parts that some are actually used, only need to connect the straight length of 3 times of instrument nominal aperture length before the ultrasonic meter using present configuration, this instrument just can reach the requirement of 2 grades of Watch Errors；And most of instrument of existing market includes electromagnetic flowmeter, need to eliminate some common interference source impacts on flow rate test through the straight length of 10 times of instrument nominal aperture length, and can only achieve the requirement (in use, the error of the instrument of inspection is limited to 2 times of the above-mentioned limits of error) of 2 grades of Watch Errors in the use of standard-required, as can be seen here, the present invention achieves substantial technique effect.
Due to the fact that employing said structure, after fluid after interference enters ultrasonic flow sensor, rationally sampled while abatement interference by present configuration, thus realize accurately measuring the purpose of the construction requirement of rate of flow of fluid, minimizing erecting bed, have and measure the advantages such as accurate, cost-effective, easy to use.
Claims (6)
1. the measurement pipeline section of a jamproof ultrasonic flow transducer, it is characterized in that described measurement pipeline section is made up of the tubaeform connection pipeline section of middle flat straight length and flat straight length two ends, described flat straight length two ends connect with the tubaeform pipeline section arc-shaped transition that is connected, the ultrasonic transducer group that described flat straight length intersects at least provided with one group of even-even and this group even-even centrage.
The measurement pipeline section of a kind of jamproof ultrasonic flow transducer the most according to claim 1, it is characterised in that adjacent ultrasonic transducer group is arranged in the same rip cutting aspect of flat straight length.
The measurement pipeline section of a kind of jamproof ultrasonic flow transducer the most according to claim 1, it is characterized in that adjacent ultrasonic transducer group is arranged in the different rip cutting aspects of flat straight length, the most described ultrasonic transducer group rip cutting basal spacing is less than 30mm.
The measurement pipeline section of a kind of jamproof ultrasonic flow transducer the most according to claim 1, it is characterised in that the upper plane of described flat straight length and the spacing of lower plane are the 25%-90% of two sides spacing.
The measurement pipeline section of a kind of jamproof ultrasonic flow transducer the most according to claim 1, it is characterised in that the two sides of described flat straight length are plane.
The measurement pipeline section of a kind of jamproof ultrasonic flow transducer the most according to claim 1, it is characterised in that the two sides of described flat straight length are arcwall face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510348554.5A CN106323392A (en) | 2015-06-23 | 2015-06-23 | An anti-interference measuring pipe segment of an ultrasonic flow sensor |
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| CN201510348554.5A CN106323392A (en) | 2015-06-23 | 2015-06-23 | An anti-interference measuring pipe segment of an ultrasonic flow sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872078A (en) * | 2017-04-21 | 2017-06-20 | 清华大学 | A kind of two-channel body for ultrasonic calorimeter |
| CN108562341A (en) * | 2018-06-21 | 2018-09-21 | 重庆前卫克罗姆表业有限责任公司 | A kind of reflective multichannel ultrasonic gas flowmeter runner |
| CN108871475A (en) * | 2018-05-04 | 2018-11-23 | 金卡智能集团股份有限公司 | Ultrasonic metering device |
| CN110081942A (en) * | 2019-05-14 | 2019-08-02 | 上海中核维思仪器仪表有限公司 | It is a kind of flexibly to measure sound channel for Commercial ultrasound gas meter, flow meter |
| CN110285861A (en) * | 2019-06-23 | 2019-09-27 | 上海玮轩电子科技有限公司 | A kind of ultrasonic flowmeter |
| CN110388972A (en) * | 2018-04-17 | 2019-10-29 | 中国石油天然气股份有限公司 | Serial calibrating device and method for non-isodiametric ultrasonic flowmeter |
| CN112798066A (en) * | 2020-12-31 | 2021-05-14 | 苍仪科技(上海)有限公司 | Ultrasonic flowmeter with rectangular flow channel |
| CN113295222A (en) * | 2020-02-21 | 2021-08-24 | 北京昌民技术有限公司 | Ultrasonic flowmeter |
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2015
- 2015-06-23 CN CN201510348554.5A patent/CN106323392A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872078A (en) * | 2017-04-21 | 2017-06-20 | 清华大学 | A kind of two-channel body for ultrasonic calorimeter |
| CN106872078B (en) * | 2017-04-21 | 2024-02-27 | 清华大学 | Double-channel pipe body for ultrasonic heat meter |
| CN110388972A (en) * | 2018-04-17 | 2019-10-29 | 中国石油天然气股份有限公司 | Serial calibrating device and method for non-isodiametric ultrasonic flowmeter |
| CN108871475A (en) * | 2018-05-04 | 2018-11-23 | 金卡智能集团股份有限公司 | Ultrasonic metering device |
| CN108562341A (en) * | 2018-06-21 | 2018-09-21 | 重庆前卫克罗姆表业有限责任公司 | A kind of reflective multichannel ultrasonic gas flowmeter runner |
| CN110081942A (en) * | 2019-05-14 | 2019-08-02 | 上海中核维思仪器仪表有限公司 | It is a kind of flexibly to measure sound channel for Commercial ultrasound gas meter, flow meter |
| CN110285861A (en) * | 2019-06-23 | 2019-09-27 | 上海玮轩电子科技有限公司 | A kind of ultrasonic flowmeter |
| CN113295222A (en) * | 2020-02-21 | 2021-08-24 | 北京昌民技术有限公司 | Ultrasonic flowmeter |
| CN112798066A (en) * | 2020-12-31 | 2021-05-14 | 苍仪科技(上海)有限公司 | Ultrasonic flowmeter with rectangular flow channel |
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