CN201203446Y - Combined quality flowmeter - Google Patents
Combined quality flowmeter Download PDFInfo
- Publication number
- CN201203446Y CN201203446Y CNU2008200222562U CN200820022256U CN201203446Y CN 201203446 Y CN201203446 Y CN 201203446Y CN U2008200222562 U CNU2008200222562 U CN U2008200222562U CN 200820022256 U CN200820022256 U CN 200820022256U CN 201203446 Y CN201203446 Y CN 201203446Y
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- differential pressure
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- flow sensor
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Abstract
The utility model relates to a composite mass flowmeter comprising a pipeline surface body, a vortex flow sensor, a targeting flow sensor or a differential pressure type flow sensor. The vortex flow sensor for measuring flow speed is mounted on the pipeline surface body as a main body, the vortex sensor or the targeting flow sensor for measuring flow speed force or the differential pressure type flow sensor for measuring flow differential pressure is mounted on the backward position of the pipeline surface body, and a multiphase flow rectifying device is arranged on the upstream end. According to the utility model, the vortex flow sensor measures flow speed, the targeting flow sensor measures the flow speed force or the differential pressure sensor measures the flow differential pressure, the sensing signals are combined, a microprocessor collects, calculates and checking the flowmeter, thereby realizing the measurement of the flow dryness, density and flow. The composite mass flowmeter has advantages of reasonable structure, simple installation and construction and high measurement precision, and is especial suitable for measuring flow, dryness and density of the two-phase and multiphase and is an ideal measurement device for the fluid flow in pipeline.
Description
Technical field
The utility model relates to a kind of measurement mechanism of pipeline inner fluid flow, specifically a kind of composite mass flowmeter.
Background technology
We know that the measurement of flow is used very extensive, as measuring various flow medias such as liquid, gas, steam in commercial production and scientific research test.Flowmeter mainly comprises vortex shedding flow meter, target type meter, differential pressure flowmeter etc.
Vortex shedding flow meter is the oscillation mode velocity flowmeter that grows up the seventies, and domestic and international flow industry and flow expert's very big concern is drawn in its appearance immediately, develops very rapid.Such instrument has simple in structure, no movable member, and crushing is little, and flow velocity and density of medium, temperature have nothing to do, and measuring accuracy is than characteristics such as height.This flowmeter has adopted vortex street (being toll bar) principle, if triangle column type vortex generation body is set in fluid, then alternately produces well-regulated vortex from vortex sounding body both sides, and this vortex claims the toll bar whirlpool, and vortex is listed in vortex generation body downstream and asymmetricly arranges.If the occurrence frequency of vortex is f, measured medium incoming flow mean flow rate is V, and the vortex sounding body width that heads on is d, and table body latus rectum is D, can obtain relational expression f=StV/ " (1-1.25d/D) d ".
Target type meter is the flowmeter of the force type that gets up of nearly 10 years development, it has the one side of vortex shedding flow meter general character, as there is not a movable member, crushing is little etc., it is based on the block body that is suspended on pipeline (promptly showing body) center, when fluid flow through this block body, its flow velocity was to the directed force F and the flow velocity (V of the fluoran stream surface generation of block body
2) density (ρ) product of quadratic sum fluid be directly proportional i.e. F=CdA ρ V
2F in/2 formulas: the power that is subjected on the block body, Cd: resistance coefficient, V: flow rate of fluid, A: block body lifting surface area.
Differential pressure flowmeter is in that successfully various flow media field obtains using very widely in the whole world aspect process control and the flow metering.18th century the forties after differential pressure measuring installation the earliest results from Bernoulli's theorem and proposes, the flow nozzle, Venturi tube and the orifice plate that use this principle to produce to distribute all over the world.The 1980s, the American has proposed a kind of new throttle style, the employing cone is a restricting element, and it is suspended in the fluid line, and fluid flows along tube wall after the cone compression rectification of pipeline center, overcome the shortcoming that traditional many defectives of differential pressure flowmeter self structure thread are brought, as: efflux coefficient instability, linearity is poor, repeatability is not high, accuracy is not high, easily contamination and easy to wear, range ratio is little, and on-the-spot mounting condition is high.At present, also there is the plug-in type vortex shedding flow meter in market.
Up to now, most of flowmeters can only be measured the volumetric flow rate of single-phase medium, and the flow of energy measurement two-phase and heterogeneous fluid not, more do not have the product of mass dryness fraction and density measure.Energy measurement two-phase flow or polyphasic flow and the flowmeter that can measure mass dryness fraction and density simultaneously be beyond example still both at home and abroad.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, rational in infrastructure, installation and easy construction, measuring accuracy height are provided, can measure the flow of two-phase and heterogeneous fluid, realize mass dryness fraction, the density of convection cell, the composite mass flowmeter of flow measurement.
The technical scheme in the invention for solving the above technical problem is: a kind of composite mass flowmeter, it includes pipeline table body, vortex flow sensors, target-type flow sensor or differential pressure flow sensor, it is characterized in that: based on the vortex flow sensors of measurement flow rate, it is installed on the pipeline table body, vortex generation body and vortex street detection probe are installed in the pipeline table body, pipeline table body downstream is equipped with vortex flow sensors or the target-type flow sensor of measurement flow rate acting force or the differential pressure flow sensor of measurement flow differential pressure of measuring vortex street lift, and upstream extremity is provided with multiphase flow rectifying device.
The said multiphase flow rectifying device of the utility model is made up of rotation blade wheel, undergauge district, diffusion region, porous rectifier, shell and pipeline table body integrative-structure.
The utility model is owing to adopt vortex flow sensors, target-type flow sensor or differential pressure flow sensor to form the combined type flowmeter, pipeline table body upstream extremity is provided with multiphase flow rectifying device, against existing technologies, the utility model utilizes the vortex flow sensors measurement flow rate, target-type flow sensor measurement flow rate acting force or differential pressure flow sensor measure the flow differential pressure or vortex flow sensors is measured vortex street lift, with the transducing signal combination, gather, calculate, table look-up, just can realize mass dryness fraction, density, the flow measurement of convection cell by microprocessor.The utility model is rational in infrastructure, installation and easy construction, measuring accuracy height, the flow that is particularly suitable for measuring two-phase and heterogeneous fluid, mass dryness fraction, density, is a kind of measurement mechanism of desirable pipeline inner fluid flow.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the another kind of structural representation of the utility model.
Fig. 3 is another structural representation of the utility model.
1. multiphase flow rectifying devices among the figure, 2. vortex flow sensors, 3. target-type flow sensor, 31. differential pressure pick-up, 32. vortex flow sensors, 4. rotation blade wheel, 5. undergauge district, 6. diffusion region, 7. porous rectifier, 8. vortex generation body, 9. vortex street detection probe, 10. porous rectifier, 11. pipeline table bodies, 12. block body, 13. connecting rods.
Embodiment
A kind of composite mass flowmeter, it includes pipeline table body 13, vortex flow sensors (or transmitter) 2, target-type flow sensor 3 or differential pressure flow sensor 31 (or transmitter) or vortex flow sensors 32, it is based on the vortex flow sensors 2 (or transmitter) of measurement flow rate, it is installed on the pipeline table body 11, vortex generation body 8 and vortex street detection probe 9 are installed in the pipeline table body 11, pipeline table body 11 downstreams are equipped with vortex flow sensors 32 or the target-type flow sensor 3 of measurement flow rate acting force or the differential pressure flow sensor 31 (or transmitter) of measurement flow differential pressure of measuring vortex street lift, and upstream extremity is provided with multiphase flow rectifying device 1.Composition structure and each parts effect thereof of above-mentioned vortex flow sensors 2 (or transmitter), target-type flow sensor 3 or differential pressure flow sensor 31 (or transmitter) and vortex flow sensors 32 are identical with prior art, are not giving unnecessary details.
The utility model utilizes the vortex flow sensors measurement flow rate, target-type flow sensor measurement flow rate acting force or differential pressure flow sensor are measured the vortex flow sensors 32 of flow differential pressure or vortex street lift and are measured vortex street lift, with the transducing signal combination, gather, calculate, table look-up, realize mass dryness fraction, density, the flow measurement of convection cell by microprocessor.In brief, as long as meet the sensor of relational expression f=StV/ " (1-1.25d/D) d ", with F=CdA ρ V
2/ 2 or the sensor of Q=K √ Δ P/ ρ etc. make up by microprocessor and gather, calculate, table look-up, show the purpose that just can reach above-mentioned detection.The density of fluid and temperature, pressure are relevant.The density of wet saturated steam and temperature, mass dryness fraction are relevant.The measurement parameter of above-mentioned relation formula is gathered computing tables look-up and just can try to achieve mass dryness fraction, density and mass rate.
Embodiment 1: as can be seen from Figure 1, a kind of composite mass flowmeter, it includes pipeline table body 11, vortex flow sensors 2, target-type flow sensor 3, it is based on the vortex flow sensors 2 of measurement flow rate, it is installed on the pipeline table body 11, vortex generation body 8 and vortex street detection probe 9 are installed in the pipeline table body 11, and pipeline table body 11 downstreams are equipped with the target-type flow sensor 3 of measurement flow rate acting force, and upstream extremity is provided with multiphase flow rectifying device 1.The said multiphase flow rectifying device 1 of the utility model is formed its shell and pipeline table body integrative-structure by rotation blade wheel 4, undergauge district 5, diffusion region 6, porous rectifier 7.The shell that is to say multiphase flow rectifying device 1 is the part of pipeline table body 11.
The state that the utility model two-phase flow or polyphasic flow flow in pipeline is very complicated, and the distribution of each phase fluid is also irregular.Its flow velocity also is not quite similar, for polyphasic flow is comparatively evenly distributed, make flow velocity close substantially, the multiphase flow rectifying device 1 that the utility model has adopted rotation blade structure and local undergauge and porous rectifier to form at upstream extremity, this device can mix polyphasic flow and quicken to force fluid towards the certain orientation rotational flow and reach uniform purpose.Flow through rotation blade when taking turns 4 when heterogeneous fluid, and fluid rotatablely moves towards the vane tilted direction.When the fluid of rotation passes through undergauge district 5, rotating fluid begins to quicken, fluid after rotation is quickened is during through diffusion region 6, the fluid rotation stops and spreading, the fluid of diffusion becomes the fluid that mixes into disturbed flow condition through porous rectifier 7, make vortex shedding flow meter place stable flow field, thereby the orderly vortex that acquisition is directly proportional with flow velocity is realized the measurement of flow velocity.For making the flow field, upstream that enters the target-type flow measurement zone more stable, so locate to be provided with porous rectifier 10 at its upstream to obtain more stable flow field, when the stabilized uniform fluid acts on the block body 12 that is suspended on table body center, the acting force that these block body 12 fluoran stream surfaces are subjected to is subjected to displacement connecting rod 13, this displacement makes the measuring sensor generation electrical property of sensor change, its electric signal has obtained the measurement of rate of flow of fluid to the directed force F of this block body 12 (also claiming target surface) through the circuit processing and amplifying, the directed force F that flow velocity V that vortex flow sensors 2 or transmitter are recorded and target type meter 3 record calculates the comprehensive density p of fluid, thereby has realized the measurement of the mass rate of fluid.The temperature of the density correspondence of wet saturated steam and mass dryness fraction can be found desired mass dryness fraction value by density, temperature, mass dryness fraction standard scale, and through the temperature and pressure of liquid crystal display mass dryness fraction or density, instantaneous mass flow, mass accumulation flow, fluid.And exportable corresponding standard signal or communication signal.All above-mentioned parameter Signal Processing and calculating are finished by microprocessor.
Embodiment 2: as can be seen from Figure 2, a kind of composite mass flowmeter, it includes pipeline table body 11, vortex flow sensors 2, differential pressure flow sensor 31, it is based on the vortex flow sensors 2 of measurement flow rate, it is installed on the pipeline table body 11, vortex generation body 8 and vortex street detection probe 9 are installed in the pipeline table body 11, and pipeline table body downstream is equipped with the differential pressure flow sensor 31 of measuring the flow differential pressure, and upstream extremity is provided with multiphase flow rectifying device 1.Said multiphase flow rectifying device 1 is identical with embodiment 1.The utility model utilizes the vortex flow sensors measurement flow rate, and differential pressure flow sensor is measured the flow differential pressure, with the transducing signal combination, gathers, calculates, tables look-up, realizes mass dryness fraction, density, the flow measurement of convection cell by microprocessor.
Embodiment 3: as can be seen from Figure 3, a kind of composite mass flowmeter, it includes pipeline table body 11, vortex flow sensors 2, vortex flow sensors 32, it is based on the vortex flow sensors 2 of measurement flow rate, it is installed on the pipeline table body 11, vortex generation body 8 and vortex street detection probe 9 are installed in the pipeline table body 11, pipeline table body downstream be equipped with measure vortex street lift vortex flow sensors 32, upstream extremity is provided with multiphase flow rectifying device 1.Said multiphase flow rectifying device 1 is identical with embodiment 1.The utility model utilizes vortex flow sensors 2 measurement flow rate and vortex flow sensors 32 to measure vortex street lift, with these transducing signal combinations, gathers, calculates, tables look-up, realizes mass dryness fraction, density, the flow measurement of convection cell by microprocessor.
The utility model is rational in infrastructure, installation and easy construction, measuring accuracy height, the flow that is particularly suitable for measuring two-phase and heterogeneous fluid, mass dryness fraction, density, is a kind of measurement mechanism of desirable pipeline inner fluid flow.
Claims (2)
1. composite mass flowmeter, it includes pipeline table body, vortex flow sensors, target-type flow sensor or differential pressure flow sensor, it is characterized in that: based on the vortex flow sensors of measurement flow rate, it is installed on the pipeline table body, vortex generation body and vortex street detection probe are installed in the pipeline table body, pipeline table body downstream is equipped with vortex flow sensors or the target-type flow sensor of measurement flow rate acting force or the differential pressure flow sensor of measurement flow differential pressure of measuring vortex street lift, and upstream extremity is provided with multiphase flow rectifying device.
2. composite mass flowmeter according to claim 1 is characterized in that: said multiphase flow rectifying device is made up of rotation blade wheel, undergauge district, diffusion region, porous rectifier, shell and pipeline table body integrative-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200222562U CN201203446Y (en) | 2008-05-12 | 2008-05-12 | Combined quality flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200222562U CN201203446Y (en) | 2008-05-12 | 2008-05-12 | Combined quality flowmeter |
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| CN201203446Y true CN201203446Y (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200222562U Expired - Fee Related CN201203446Y (en) | 2008-05-12 | 2008-05-12 | Combined quality flowmeter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881640A (en) * | 2010-06-30 | 2010-11-10 | 重庆耐德正奇流量仪表有限公司 | Vortex mass flow meter |
| CN102095461A (en) * | 2011-01-18 | 2011-06-15 | 姚贤卿 | Compound type dryness mass flow instrument and dryness calibration and measurement method |
| CN107036666A (en) * | 2017-06-03 | 2017-08-11 | 华北水利水电大学 | A kind of target formula large diameter pipeline amount water installations and its water gaging method |
| CN107664524A (en) * | 2017-09-23 | 2018-02-06 | 新疆中元天能油气科技股份有限公司 | One-piece type vortex street throttle type gas-liquid biphase flowmeter |
| CN108896120A (en) * | 2018-08-23 | 2018-11-27 | 中国石油天然气股份有限公司 | Vortex street throttling integral type gas-liquid biphase flowmeter and its application method |
| CN109187295A (en) * | 2018-09-03 | 2019-01-11 | 南京科远自动化集团股份有限公司 | First air on-line system for measuring the densities and measurement method |
| CN109282863A (en) * | 2018-10-22 | 2019-01-29 | 山东科尔自动化仪表股份有限公司 | A kind of double vortex street sensor fluid control devices of shock type and control method |
| CN109282862A (en) * | 2018-10-22 | 2019-01-29 | 山东科尔自动化仪表股份有限公司 | A kind of double vortex street sensor fluid measurement instruments of shock type and measurement method |
-
2008
- 2008-05-12 CN CNU2008200222562U patent/CN201203446Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881640A (en) * | 2010-06-30 | 2010-11-10 | 重庆耐德正奇流量仪表有限公司 | Vortex mass flow meter |
| CN102095461A (en) * | 2011-01-18 | 2011-06-15 | 姚贤卿 | Compound type dryness mass flow instrument and dryness calibration and measurement method |
| CN107036666A (en) * | 2017-06-03 | 2017-08-11 | 华北水利水电大学 | A kind of target formula large diameter pipeline amount water installations and its water gaging method |
| CN107036666B (en) * | 2017-06-03 | 2023-10-27 | 华北水利水电大学 | Target type large-caliber pipeline water measuring device and water measuring method thereof |
| CN107664524A (en) * | 2017-09-23 | 2018-02-06 | 新疆中元天能油气科技股份有限公司 | One-piece type vortex street throttle type gas-liquid biphase flowmeter |
| CN108896120A (en) * | 2018-08-23 | 2018-11-27 | 中国石油天然气股份有限公司 | Vortex street throttling integral type gas-liquid biphase flowmeter and its application method |
| CN109187295A (en) * | 2018-09-03 | 2019-01-11 | 南京科远自动化集团股份有限公司 | First air on-line system for measuring the densities and measurement method |
| CN109282863A (en) * | 2018-10-22 | 2019-01-29 | 山东科尔自动化仪表股份有限公司 | A kind of double vortex street sensor fluid control devices of shock type and control method |
| CN109282862A (en) * | 2018-10-22 | 2019-01-29 | 山东科尔自动化仪表股份有限公司 | A kind of double vortex street sensor fluid measurement instruments of shock type and measurement method |
| CN109282862B (en) * | 2018-10-22 | 2024-01-09 | 山东科尔自动化仪表股份有限公司 | Vibration-resistant type double vortex street sensor fluid measuring device and measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20130512 |