CN107179105A - Flow measurement device - Google Patents

Flow measurement device Download PDF

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Publication number
CN107179105A
CN107179105A CN201710412959.XA CN201710412959A CN107179105A CN 107179105 A CN107179105 A CN 107179105A CN 201710412959 A CN201710412959 A CN 201710412959A CN 107179105 A CN107179105 A CN 107179105A
Authority
CN
China
Prior art keywords
flow
measurement
flow measurement
pressure
throttling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710412959.XA
Other languages
Chinese (zh)
Inventor
范培安
刘炳建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenhua Group Corp Ltd
Shenhua Guoneng Group Corp Ltd
Tianjin Dagang Power Plant of Shenhua Guoneng Group Co Ltd
Original Assignee
Shenhua Group Corp Ltd
Shenhua Guoneng Group Corp Ltd
Tianjin Dagang Power Plant of Shenhua Guoneng Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenhua Group Corp Ltd, Shenhua Guoneng Group Corp Ltd, Tianjin Dagang Power Plant of Shenhua Guoneng Group Co Ltd filed Critical Shenhua Group Corp Ltd
Priority to CN201710412959.XA priority Critical patent/CN107179105A/en
Publication of CN107179105A publication Critical patent/CN107179105A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects
    • G01F1/34Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/50Correcting or compensating means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/12Cleaning arrangements; Filters

Abstract

The present invention relates to measuring apparatus field, a kind of flow measurement device is disclosed, the flow measurement device includes:Multiple flow sensors, are set in the duct with array, are configured to detect rate of flow of fluid, wherein, each flow sensor includes:Measurement rectifying tube, the throttling element and pressure tappings that are co-axially located in the measurement rectifying tube, the pressure tappings are configured so that the flow measurement device can obtain fluid and flow through pressure difference before and after the throttling element.By above-mentioned technical proposal, the multiple flow sensors set using array way can eliminate the upper smooth uneven influence caused to flow measurement of pipeline section product, obtain accurate flow measuring data.

Description

Flow measurement device
Technical field
The present invention relates to measuring apparatus field, more particularly to a kind of flow measurement device.
Background technology
Since being come out from end of the sixties in last century mean velocity tube flowmeter, though it is different to update title, skin has been all based on Trustship measuring principle, one kind of flow is calculated with the flow velocity of some on diameter (pipe) in test tube road or long and wide (rectangular tube) Plug-in type flow instrument.Common also has venturi type, wing type, thermal diffusion type.
Above-mentioned flowmeter can be realized carries out flow measurement, the advantage and disadvantage having nothing in common with each other to fluid.
Average rate pipe type flowmeter, advantage is that plug-in type is easy for installation;Resistance is small, and energy-efficient performance is good;Reaction speed is fast;Can be real Existing multiple spot arrangement measurement wind trunk mean flow rate;Have the disadvantage that pressure tappings are easily blocked, operation maintenance amount is big, is not suitable for the wind of medium containing powder Measurement.
Venturimeter, advantage is that plug-in type is easy for installation;Resistance is small, and energy-efficient performance is good;Reaction speed is fast;Shortcoming It is that pressure tappings are easily blocked, operation maintenance amount is big, is not suitable for medium containing powder;If single-point is arranged, the air quantity for being not suitable for wind trunk is surveyed Amount.
Wing type flowmeter, advantage is that reaction speed is fast;Multimetering wind trunk mean flow rate;Have the disadvantage that volume is big, peace Dress is inconvenient;Duct resistance is big, does not save;Pressure tappings are easily blocked, and operation maintenance amount is big, is not suitable for medium containing powder.
Thermal diffusion type flowmeter, advantage is that plug-in type is easy for installation;Resistance is small, and energy-efficient performance is good;Non- differential pressure mode is measured, In the absence of blockage problem, operation maintenance amount is small;Low flow velocity precision is high;Have the disadvantage that heat exchange pattern is measured, there is hysteresis;Valency Lattice are high;It is non-directional;Dust stratification on electrode can influence its measurement accuracy;If single-point is arranged, it is not suitable for the measurement of wind trunk.
Inventor has found that flowmeter of the prior art, which exists, easily to be blocked or uncomfortable when implementing embodiments of the invention The problem of being measured for wind trunk.
For above-mentioned technical problem, good solution is there is no in the prior art.
The content of the invention
The invention aims to overcome the easy blocking of prior art presence or be not suitable for asking for wind trunk measurement Topic is there is provided a kind of flow measurement device, the characteristics of flow measurement device has strong applicability simple in construction.
To achieve these goals, one aspect of the present invention provides a kind of flow measurement device, and the flow measurement device includes:
Multiple flow sensors, are set in the duct with array, are configured to detect rate of flow of fluid, wherein,
Each flow sensor includes:Measurement rectifying tube, the throttling element that is co-axially located in the measurement rectifying tube with And pressure tappings, the pressure tappings are configured so that the flow measurement device can be obtained before and after fluid flows through the throttling element Pressure difference.
Alternatively, each flow sensor has two pressure tappings, wherein the first pressure tappings are arranged on the throttling The front portion of part, and the second pressure tappings are arranged on the throttling element upper fluid and pass through the Peak Flow Rate portion during throttling element;With And
Each flow sensor also include the first impulse conduit of connection corresponding with described two pressure tappings respectively and Second impulse conduit, wherein the first impulse conduit and first pressure tappings junction and the second impulse conduit with The junction of second pressure tappings respectively sets a dust remover, and the dust remover is configured to vibrate in the case where fluid impact is acted on.
Alternatively, the dust remover is T-shaped pendulum dust remover.
Alternatively, the flow measurement device includes the malleation efferent duct and negative pressure efferent duct for being adapted to pressure difference transmitter, The plurality of first impulse conduit is connected with the malleation efferent duct, and the multiple second impulse conduit and institute State the connection of negative pressure efferent duct.
Alternatively, the measurement rectifying tube and/or the throttling element are corundum material.
Alternatively, the array is at least one row.
Alternatively, the flow measurement device is arranged on the straight length of the pipeline, and the flow development length is more than or waited In the diameter of 1.5 times of pipelines.
Alternatively, the flow measurement device is arranged on the straight tube segment length flowed on the straight length of the pipeline along fluid Preceding the five of degree/everywhere.
Alternatively, the flow measurement device is configured to be arranged in the pipeline by base, wherein, the base It is pre-welded on the pipeline.
Alternatively, the multiple flow sensor is according to uiform section array arrangement.
Alternatively, the fluid is air-flow or current.
By above-mentioned technical proposal, the multiple flow sensors set using array way can be eliminated in pipeline section product Smooth inequality spares to the influence that flow measurement is caused, and obtains accurate flow measuring data.
The further feature and advantage of the embodiment of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is that the embodiment of the present invention is further understood for providing, and constitutes a part for specification, with The embodiment in face is used to explain the embodiment of the present invention together, but does not constitute the limitation to the embodiment of the present invention.Attached In figure:
Fig. 1 is the flow measurement device composition schematic diagram that example embodiment of the present invention is provided;
Fig. 2 is flow sensor composition structural representation in the flow measurement device that embodiment of the present invention is provided;And
Fig. 3 is the impulse conduit profile of the flow sensor shown in Fig. 2.
Description of reference numerals
The base of 1 flow sensor 2
The negative pressure efferent duct of 3 malleation efferent duct 4
The sealing device of 5 fixing device 6
The rectifying tube of 7 pipeline 11
The impulse conduit of 12 throttling element 13
The pressure tappings of 14 impulse conduit 15
The dust remover of 16 pressure tappings 17.
Embodiment
The embodiment of the embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this The embodiment of place description is merely to illustrate and explain the present invention embodiment, is not intended to limit the invention embodiment.
In the present invention, in the case where not making opposite explanation, the noun of locality used such as " upper and lower, left and right " is typically referred to Orientation shown in figure.
Should in the airduct air channel of electricity generation boiler with flow measurement device in the description below for embodiment Illustrated exemplified by.It should be noted that the principle by taking airduct air channel as an example only for the description present invention, not to the present invention's Protection domain is limited.The flow measurement device that embodiment of the present invention is provided is applied to air-flow, is equally applicable to current etc. Liquid flow.
Fig. 1 is the flow measurement device composition schematic diagram that example embodiment of the present invention is provided.As shown in figure 1, of the invention Embodiment provide a kind of flow measurement device, the flow measurement device can include:Multiple flow sensors 1, with array It is arranged in pipeline 7, is configured to detect the flow velocity of fluid in pipeline 7, wherein, each flow sensor 1 can include:Measurement Rectifying tube 11, the throttling element 12 and pressure tappings 15 (16) being co-axially located in the measurement rectifying tube 11, pressure tappings 15 (16) can To be configured so that the flow measurement device 1 can obtain fluid and flow through pressure difference before and after the throttling element 12.
In embodiments, flow measurement device 1 can also include the He of malleation efferent duct 3 for being adapted to pressure difference transmitter Negative pressure efferent duct 4.In embodiments, the flow measurement device that the present invention is provided can be based on S-shaped Pitot tube measuring principle, i.e., Flow sensor is used as using S-shaped Pitot tube.Flow measurement device is arranged on pipeline, flow sensor array is located at pipe It is interior.When there is air current flow in pipe, the windward side of array is converted into pressure energy by gas shock, the here kinetic energy of air-flow, because And head-on overpressure is higher, its pressure is properly termed as " total head ";And leeward side is not due to by air-flow punching press, the pressure in its pipe For the static pressure in airduct, its pressure is referred to as " static pressure ".Total head and the difference of static pressure are referred to as differential pressure, and its size has with wind speed in pipe Close, wind speed is bigger, and differential pressure is bigger;Wind speed is small, and differential pressure is also small, and the relation of wind speed and differential pressure meets Bernoulli equation:
Wherein, V is wind speed, unit:m/s;K is the discharge coefficient of flow measurement device;△ P are differential pressure, unit:Pa;With And ρ is gas density, unit:kg/m3
, can be by fluid little by little using the throttling element being coaxially mounted in measurement rectifying tube by above-mentioned technical proposal Throttling is retracted near the interior side wall of measurement rectifying tube, allows fluid to flow through between throttling element and measurement rectification inside pipe wall are formed Gap, so that the differential pressure before and after forming throttling element;By measuring this differential pressure △ P, it is possible to achieve flow measurement.Set using array way The multiple flow sensors put can eliminate the upper uneven influence caused to flow measurement in flow field of pipeline section product, obtain accurate Flow measuring data.
Fig. 2 is flow sensor composition structural representation in the flow measurement device that embodiment of the present invention is provided, and Fig. 3 is The impulse conduit profile of flow sensor shown in Fig. 2.Embodiment of the present invention is carried below in conjunction with Fig. 2 and Fig. 3 The composition structure of flow sensor in the flow measurement device of confession is described in detail.
As shown in Figures 2 and 3, in embodiments, each flow sensor 1 can have two pressure tappings 15 (16), Wherein pressure tappings 15 are arranged on the front portion of the throttling element 12, and pressure tappings 16 are arranged on the upper fluid of throttling element 12 and pass through throttling Peak Flow Rate portion during part 12;And each flow sensor 1 also includes connection corresponding with two pressure tappings 15 (16) respectively Impulse conduit 13 (14), wherein impulse conduit 13 and the junction of pressure tappings 15 and the junction of impulse conduit 14 and pressure tappings 16 One dust remover 17 is respectively set, and the dust remover 17 is configured to vibrate in the case where fluid impact is acted on, as shown in figure 3, can be along void Track swing shown in line.
In the embodiment of citing, flow sensor can be the Venturi tube based on venturi measuring principle.Deashing Device 17 can be T-shaped pendulum dust remover.T-shaped two ends are rotatably mounted near pressure tappings 15 (16), in pipeline interior air-flow The lower dust remover 17 of impact can make random swing, play from deashing effect.Surveyed according to inventor, by setting dust remover 17, even if coal powder density reaches 50% in pipeline, longtime running does not result in device or pipeline blockage yet.
In embodiments, multiple impulse conduits 13 can be connected with malleation efferent duct 3, and multiple impulse conduits 14 can be connected with negative pressure efferent duct 4, equivalent to pressure of the output from whole impulse conduits 13 at malleation efferent duct 3, and The pressure from whole impulse conduits 14 is exported at negative pressure efferent duct 4, pipeline section product is eliminated by UNICOM's impulse conduit On the uneven material slow-witted to measurement in flow field influence.
In embodiments, the part contacted in the flow measurement device that embodiment of the present invention is provided with fluid can be adopted Manufactured with high-abrasive material.For example, measurement rectifying tube 11 and throttling element 12 can be corundum material.
In embodiments, flow sensor array can be set according to the shape or size of pipeline.In the reality of citing Apply in mode, array can be a row.In interchangeable embodiment, array is at least two row.For example, for large scale pipe Road can be laid out using the gridding method of many column arrays, and flow sensor is carried out according to uiform section array arrangement to survey with section multiple spot Amount, can accurately measure gas flow rate flow.It should be noted that for the connected mode of impulse conduit, can using welding or Person's threaded connection etc. ensures the connected mode of air-tightness.
In embodiments, flow measurement device is preferably disposed at the straight length of pipe under test, the flow development length More than or equal to the diameter of 1.5 times of pipelines.For the position in pipeline, it is preferable that flow measurement device can be set Five before the flow development length flowed on the straight length of pipe under test along fluid /everywhere.
In embodiments, flow measurement device can include base 2.The base 2 can treat test tube by being pre-welded to On road 7.Flow measurement device can be arranged in pipeline 7 by base 2, for example, pass through the fixing device 5 of such as bolt and nut. In order to ensure excellent sealing, sealing device 6 can be set at fixing device 5.
Surveyed according to inventor, be arranged on an air channel and survey in the flow measurement device for providing embodiment of the present invention In the case of measuring First air, compared with such as wing type, average rate pipe type flowmeter, the dynamic pressure more than one times can be produced.
Because the airduct air channel straight length of electricity generation boiler is typically shorter, the flow field in pipeline section product is very uneven, has Position even have backflow produce.When the sectional area in air channel is larger, the air quantity in spot measurement air channel be it is inaccurate, even The data that it is measured are without in all senses.The flow measurement device provided by embodiment of the present invention, using uiform section array cloth The method for putting multiple measuring points, can measure the average speed in same section.The reconnaissance method used can be ISO3966《Sealed tube The velocity-area method of the measurement of fluid flow-use Pitot static tube in road》Or ISO 7145:1982《Circular cross-section sealed tube The measure of fluid flow in road-section a little on measuring speed method》Equal-area method specified in international standard.Pass through The flow measurement device that embodiment of the present invention is provided, for variously-shaped air channel, can determine institute according to on-site actual situations Need the quantity of measuring point, the quantity of measurement apparatus and arrangement etc..In addition, it be also equipped with insertion, it is easy for installation;Resistance is small, section Energy property is good;Reaction speed is fast;The features such as multimetering wind trunk mean flow rate.
The optional embodiment of example of the present invention is described in detail above in association with accompanying drawing, still, the embodiment of the present invention is not limited Detail in above-mentioned embodiment, can be to the embodiment of the present invention in the range of the technology design of the embodiment of the present invention Technical scheme carry out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair Various possible combinations no longer separately illustrate.
In addition, can also be combined between a variety of embodiments of the embodiment of the present invention, as long as it is not The thought of the embodiment of the present invention is run counter to, it should equally be considered as disclosure of that of the embodiment of the present invention.

Claims (10)

1. a kind of flow measurement device, it is characterised in that the flow measurement device includes:
Multiple flow sensors, are set in the duct with array, are configured to detect rate of flow of fluid, wherein, each flow velocity Sensor includes:Measurement rectifying tube, the throttling element and pressure tappings that are co-axially located in the measurement rectifying tube, the pressure tappings quilt Configure so that the flow measurement device can obtain fluid and flow through pressure difference before and after the throttling element.
2. flow measurement device according to claim 1, it is characterised in that each flow sensor has two and taken Mouth is pressed, wherein the first pressure tappings are arranged on the front portion of the throttling element, and the second pressure tappings are arranged on the throttling element upstream Body passes through the Peak Flow Rate portion during throttling element;And
Each flow sensor also includes the first impulse conduit and second of connection corresponding with described two pressure tappings respectively Impulse conduit, wherein the first impulse conduit and first pressure tappings junction and the second impulse conduit with it is described The junction of second pressure tappings respectively sets a dust remover, and the dust remover is configured to vibrate in the case where fluid impact is acted on.
3. flow measurement device according to claim 2, it is characterised in that the dust remover is T-shaped pendulum dust remover.
4. flow measurement device according to claim 2, it is characterised in that the flow measurement device includes being adapted to pressure The malleation efferent duct and negative pressure efferent duct of poor transmitter, the plurality of first impulse conduit connect with the malleation efferent duct Connect, and the multiple second impulse conduit is connected with the negative pressure efferent duct.
5. flow measurement device according to claim 1, it is characterised in that the measurement rectifying tube and/or the throttling Part is corundum material.
6. flow measurement device according to claim 1, it is characterised in that the array is at least one row.
7. flow measurement device according to claim 1, it is characterised in that the flow measurement device is arranged on described The straight length of pipeline, the flow development length is more than or equal to the diameter of 1.5 times of pipelines.
8. flow measurement device according to claim 1, it is characterised in that the flow measurement device is arranged on described Five before the flow development length flowed on the straight length of pipeline along fluid /everywhere.
9. flow measurement device according to claim 1, it is characterised in that the flow measurement device is configured to pass through Base is arranged in the pipeline, wherein, the base is pre-welded on the pipeline.
10. flow measurement device according to claim 1, it is characterised in that the multiple flow sensor is cut according to grade Face array arrangement.
CN201710412959.XA 2017-06-05 2017-06-05 Flow measurement device Pending CN107179105A (en)

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Application Number Priority Date Filing Date Title
CN201710412959.XA CN107179105A (en) 2017-06-05 2017-06-05 Flow measurement device

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Application Number Priority Date Filing Date Title
CN201710412959.XA CN107179105A (en) 2017-06-05 2017-06-05 Flow measurement device

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CN107179105A true CN107179105A (en) 2017-09-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110979773A (en) * 2019-12-24 2020-04-10 安徽沛愉包装科技有限公司 High-efficient filling device of non-contact liquid
CN111003230A (en) * 2019-12-24 2020-04-14 安徽沛愉包装科技有限公司 Liquid level control method by negative pressure non-contact liquid filling
CN111003229A (en) * 2019-12-24 2020-04-14 安徽沛愉包装科技有限公司 Liquid level control method for non-contact liquid filling by positive pressure method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204228210U (en) * 2014-12-11 2015-03-25 田必勇 A kind of wear-resisting type self-cleaning flow measurement device
CN105115549A (en) * 2015-08-12 2015-12-02 银川融神威自动化仪表厂(有限公司) Large-diameter multi-throat flow meter
CN204944561U (en) * 2015-08-12 2016-01-06 银川融神威自动化仪表厂(有限公司) A kind of low pressure loss surpasses accelerometer measuring device
CN205664883U (en) * 2016-05-26 2016-10-26 北京中控环宇电力科技有限公司 Matrix flue gas flux measuring device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204228210U (en) * 2014-12-11 2015-03-25 田必勇 A kind of wear-resisting type self-cleaning flow measurement device
CN105115549A (en) * 2015-08-12 2015-12-02 银川融神威自动化仪表厂(有限公司) Large-diameter multi-throat flow meter
CN204944561U (en) * 2015-08-12 2016-01-06 银川融神威自动化仪表厂(有限公司) A kind of low pressure loss surpasses accelerometer measuring device
CN205664883U (en) * 2016-05-26 2016-10-26 北京中控环宇电力科技有限公司 Matrix flue gas flux measuring device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110979773A (en) * 2019-12-24 2020-04-10 安徽沛愉包装科技有限公司 High-efficient filling device of non-contact liquid
CN111003230A (en) * 2019-12-24 2020-04-14 安徽沛愉包装科技有限公司 Liquid level control method by negative pressure non-contact liquid filling
CN111003229A (en) * 2019-12-24 2020-04-14 安徽沛愉包装科技有限公司 Liquid level control method for non-contact liquid filling by positive pressure method

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Application publication date: 20170919

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