CN107167194B - A kind of gas pipeline rectifier - Google Patents
A kind of gas pipeline rectifier Download PDFInfo
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- CN107167194B CN107167194B CN201710300030.8A CN201710300030A CN107167194B CN 107167194 B CN107167194 B CN 107167194B CN 201710300030 A CN201710300030 A CN 201710300030A CN 107167194 B CN107167194 B CN 107167194B
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- cowling panel
- rectification
- rectifier
- length
- hole
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- 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
- G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of gas pipeline rectifiers, including shell, the first cowling panel, the second cowling panel and third cowling panel；Reserved section before being between first cowling panel and housing forward end, is the first breeze way between the first cowling panel and the second cowling panel；It is the second breeze way between second cowling panel and third cowling panel；Section is reserved after being between third cowling panel and shell tail end；There is cellular first rectification hole on first cowling panel, there is cellular second rectification hole on the second cowling panel, there is cellular third rectification hole on third cowling panel.Multiple cowling panels are equipped in rectifier shell of the invention, pass through the spacing and pore size between optimization cowling panel, so that the rectification effect of rectifier significantly increases, more stable air-flow can be generated in gas pipeline, and the air flow method in same section is uniform, can be improved the detection accuracy of flowmeter.
Description
Technical field
The present invention relates to rectifier technical fields, and in particular to arrives a kind of gas pipeline rectifier.
Background technique
With the fast development of digital instrument especially ultrasonic flowmeter technology, a large amount of ultrasonic flowmeter is had been widely used
In the measurement of the gases such as natural gas, oil gas and coal gas.In practical applications, gas ultrasonic flowmeter installs and uses condition ratio
Relatively severe, the straight pipe of upstream and downstream is shorter, and the gas flow rate being evenly distributed can not be formed in ultrasonic flowmeter, influences to surpass
The measuring accuracy of sonic flowmeter.Therefore it usually requires to arrange longer straight pipe and gasotron in the front end of flowmeter.
Currently, non-uniform gas is usually passed through porous plate prior art discloses a variety of multiaperture-type rectifiers
Rearrangement is carried out, to form equally distributed gas flow rate.These gasotrons since the length dimension of component is larger,
Can be to improve the distribution of gas flow rate under certain effect, but all can not accomplish front and back flow development length not and influence ultrasonic flowmeter meter
The requirement of accuracy of measurement.
Traditional gasotron is divided into plate and two kinds of sheet, both rectifiers are widely used in the water conservancy diversion of gas, disappear
Except vortex and distribution of regulating the speed；But current gasotron is the axial direction being designed for round or square pipe mostly
Rectifier determines that the gas into cavity exists for the radial air inlet mode of this one or more of ring cavity or square lumen road
It is non-uniform from the beginning in circumferential direction, if each air inlet aerodynamic parameter has difference, air-flow even has larger in the circumferential
Distortion.If therefore in radial directions without gasotron, and when pipeline axial length is shorter, it is difficult to ensure that cavity is worked off one's feeling vent one's spleen
Body aerodynamic parameter it is uniform.
Summary of the invention
The object of the present invention is to provide a kind of gas pipeline rectifiers.
In order to achieve the above object, provided in one embodiment of the present of invention a kind of gas pipeline rectifier, including shell with
And it is successively set on intracorporal first cowling panel of shell, the second cowling panel and third cowling panel；
Reserved section, slow for first between the first cowling panel and the second cowling panel before being between first cowling panel and housing forward end
Rush section；It is the second breeze way between second cowling panel and third cowling panel；It is reserved after being between third cowling panel and shell tail end
Section；
There is cellular first rectification hole on first cowling panel, there is cellular second rectification on the second cowling panel
Hole has cellular third rectification hole on third cowling panel；
The length of preceding reserved section is S1, and the length of the first breeze way is S2, and the length of the second breeze way is S3, reserves section afterwards
Length be S4；The aperture of first rectification hole is R1, length d1, and the aperture of the second rectification hole is R2, length d2, and third is whole
The aperture of discharge orifice is R3, length d3；
K=1.3~3.
Preferably, the wall thickness of the first rectification hole, the second rectification hole and third rectification hole is 0.1mm.
Preferably, the first rectification hole, the second rectification hole and third rectification hole are hexagonal hole.
Preferably, the length of preceding reserved section S1 is 2mm.
Preferably, the length of reserved section S4 is 2mm afterwards.
Preferably, S2 7mm, R1 4.8mm, D 50mm, d1 9.5mm, k value are 1.3125.
Preferably, S3 10mm, R2 3.2mm, D 50mm, d3 12.5mm, k value are 2.7188.
In conclusion the invention has the following advantages that
Multiple cowling panels are equipped in rectifier shell of the invention, it is big by spacing between optimization cowling panel and aperture
It is small, so that the rectification effect of rectifier significantly increases, more stable air-flow, and same section can be generated in gas pipeline
The air flow method in face is uniform, can be improved the detection accuracy of flowmeter.
Detailed description of the invention
Fig. 1 is the front section view of one embodiment of the invention；
Fig. 2 is experimental result in one embodiment of the invention；
Fig. 3 is experimental result in one embodiment of the invention.
Wherein, 1, shell；2, the first cowling panel；3, the second cowling panel；4, third cowling panel；5, the first rectification hole；6,
Two rectification holes；7, third rectification hole.
Specific embodiment
With reference to Fig. 1, the invention discloses a kind of gas pipeline rectifier, including shell and to be successively set on shell intracorporal
First cowling panel, the second cowling panel and third cowling panel.Three cowling panels can be immobilized in the shell portion by inlaid type, can also
Fixation is positioned to configure pin or bolt.Reserved section before being between first cowling panel and housing forward end, the first cowling panel with
It is the first breeze way between second cowling panel；It is the second breeze way between second cowling panel and third cowling panel；Third cowling panel
Section is reserved after being between shell tail end.
There is cellular first rectification hole on first cowling panel, there is cellular second rectification on the second cowling panel
Hole has cellular third rectification hole on third cowling panel, and preferably the first rectification hole, the second rectification hole and third rectification hole are
Hexagonal hole；The wall thickness of first rectification hole, the second rectification hole and third rectification hole is 0.1mm.
The length of preceding reserved section is S1, and the length of the first breeze way is S2, and the length of the second breeze way is S3, reserves section afterwards
Length be S4；The aperture of first rectification hole is R1, length d1, and the aperture of the second rectification hole is R2, length d2, and third is whole
The aperture of discharge orifice is R3, length d3；Rectifier of the invention meets following parameter request:
K=1.3~3.
As one of optimal enforcement example of the invention, the length of preceding reserved section S1 is 2mm, and the length of rear reserved section S4 is
2mm。
As one of optimal enforcement example of the invention, S2 7mm, R1 4.8mm, D 50mm, d1 9.5mm, k value is
1.3125；Due to that may not be rounded completely in calculating process, k value of the invention takes at most five significant figures after computation
Word.
As one of optimal enforcement example of the invention, S3 10mm, R2 3.2mm, D 50mm, d3 12.5mm, k value
It is 2.7188.
Experimental example 1
Experimental method: arrangement two systems are wherein sequentially arranged one containing there are three the whole of cowling panel on the pipeline of system 1
Device and a ultrasonic flowmeter are flowed, can choose the device of the invention；System 2 is disposed with one containing there are two the whole of cowling panel
Stream device and a ultrasonic flowmeter, system 3 are disposed with a fairing and a ultrasonic flow rate containing a cowling panel
Meter.Select air as experiment gas source, the diameter of gas pipeline is 50mm, nominal flow rate 3m/s；It measures and is used in three systems
The flow velocity that same ultrasonic flowmeter measures；Wherein the detection flow velocity of system 1 and nominal flow rate error are 0.2%, the detection of system 2
Flow velocity and nominal flow rate error are 0.7%；The detection flow velocity and nominal flow rate error of system 3 are 1.2%；It can be seen that by
After multistage rectification, the flow velocity of detection is more accurate；Illustrate that the admittance area fluidised form of cowling panel is more stable, rectification effect is got over
Good, air flow method is more balanced, so that detection effect is more preferable.
It is learnt by other experiments of above-mentioned experiment and inventor, the aperture of the rectification effect of rectifier and cowling panel,
Spacing and housing inner diameter D are related.Under normal circumstances, the airflow shape before rectifier rectification has an impact to rectification effect, such as
Gas velocity before rectification, which is evenly distributed, can obtain better rectification effect compared to gas velocity gas unevenly distributed, whole
The gas flow rate gap of same sectional position is smaller after stream, is conducive to obtain higher accuracy when flowmeter detection in this way.When
When the cowling panel of rectifier reaches 3 or more, good rectification effect can be obtained, thus be not necessarily to increase by 3 with
On cowling panel.
Rectifier is internally provided with multiple cowling panels, and the cowling panel in front end will enter after arranging to air-flow
Next cowling panel carries out secondary rectification, and good rectification effect can be obtained in this way after repeatedly rectifying.Rectifier is general
It is shorter, quite either its 1~2 times or so of most of and flowtube.Air flow path inside rectifier is shorter, invention human hair
Now there is certain rule in the fluidised form that cowling panel is formed behind by the gas of each cowling panel, i.e., in the portion close to cowling panel
Divide gas flow pattern disorder, the fluidised form after certain distance at its same section tends towards stability, using interfering with each other for certain length
The fluidised form in same section tends to disorder again afterwards, and stable state in the middle part of the disorder of both ends is presented.If certain rectifier shell itself foot
It is enough long, then it will form secondary state to tend towards stability, however this distance is probably 10 times~20 times or so of caliber, with
Consistent using the principle of straight pipe in the prior art, i.e. gas tends towards stability fluidised form after longer straight pipe.However it rectifies
The length limited of device is not easy to using longer size, therefore utilizes the first stabilization of fluidized area of the state that tends towards stability for the first time
Domain is suitable.
Experimental example 2
Experimental method: set of system is arranged, the fairing of one cowling panel containing there are three of arrangement, whole on the pipeline of system
Flowing R in device is 4.8mm, and D 50mm, d 9.5mm, wherein the rear end of the last one cowling panel is provided with multiple flowmeters, each
Flowmeter intervalSelect air as experiment gas source, the diameter of gas pipeline is 50mm, nominal flow rate 3m/
s。
Velocity flow profile of the rectifier rear end different location on same section is detected, detection zone is 5 on each section,
The flow rate detection position of flowmeter on each section is as shown in Figure 1, five points of a~e are test point in Fig. 1, and wherein c is in axis
On line.Flowmeter can be used to complete in the flow rate detection of a~e5 point, ultrasonic wave analogous diagram can be used also to be joined
Number is more accurate in this way.Five test points are on same section, and the current differences of five points illustrates that its fluidised form is more steady away from smaller
It is fixed；When the current difference between five test points away from it is bigger when, illustrate its fluidised form also not up to stablize.In order to convenient for characterization gas
The stable state of body characterizes stable state with P value.P value is by the squared difference in five points between spaced points and in terms of carrying out
It calculates, i.e. P=(Va-Vc)2+(Vb-Vd)2+(Vc-Ve)2+(Vb-Vd)2Value；Wherein a-c is the stream of test point a and test point c
Speed difference；Remaining is similar.When P value is bigger, illustrate that fluidised form is more unstable, P value is got over hour, and gas is more stable.
Fig. 2 and Fig. 3 is the experimental result of experimental example 2；It is 0.8, i.e. distance that curve 1, which is k, in Fig. 2 When should
The current curve of section difference test point；Curve 2 is that k is 2.2, i.e. distanceWhen the section difference test point
Current curve；Curve 3 is that k is 4.5, i.e. distanceWhen the section difference test point current curve.From above-mentioned
As can be seen that the current difference of each test point of curve 2 is away from relatively small in Fig. 2, curve 1 and 3 middle position of curve and tube wall are attached
The current difference of part position is away from larger；The flow speed stability of 2 region of illustrative graph, gas flow pattern are relatively stable.
K is represented at a distance from third cowling panel rear end in Fig. 3, indicates distance as K=1And so on.
From in Fig. 3 it can also be seen that illustrating that the fluidised form in this section is relatively stable when K value is that P value is relatively small between 1.3~3.
Therefore, it can be seen that by above-mentioned experiment when being tested using air, the air after flowing through cowling panel is best
Fluidised form has certain relationship at a distance from two cowling panels.When replacing the cowling panel of different length or installation number, flow velocity is flat
There is direct relation in steady region and aperture, spacing and housing inner diameter D.Such as replace different size of detection caliber D i.e. shell
When internal diameter, remaining parameter constant；After D value increase, steady fluidised form section increases at a distance from cowling panel, and specific experiment result is such as
Shown in Fig. 3.By existing in the multiple authentication and combination Fig. 2 of inventor as can be seen that working as distanceK=1.3
When~3 range when the first stabilization of fluidized region, the region of fluid stable, two sides is in unsteady state, when process is longer
When being in the second stabilization of fluidized region after distance, fluidised form also tends towards stability.
Likewise, the fluidised form of gas obtains the equilibrium of first time, by the gas of the first rectification hole after the first rectifier
Stream forms relatively stable form behind rectification hole.But since rectification hole itself has certain thickness, length also compared with
It is short, so that the air-flow of outflow is easy to be formed about disorder in rectification hole, cause VELOCITY DISTRIBUTION unbalanced, air flow press molding is changed
Become, unstable fluidised form occurs in part.Air-flow is during continuing flowing, since space is larger relatively in rectification hole,
Air pressure is opposite will to change and then reduce, after the decrease the air-flow on same level interface and phase under the action of neighbouring interface
There is the first stabilization of fluidized region so that Velocity Profiles are relatively uniform in mutually fusion.After continuing flowing, vortex phenomenon makes
The air-flow at different interfaces interferes with each other and tends to be serious, disorder flow area easy to form, so that gas flow rate distribution opposite the
One stabilization of fluidized region is unbalanced.
From the above, it is seen that if the air inlet of rectification hole everywhere when the pipeline section that air flow press molding is evenly distributed, can obtain
Better rectification effect, when flow area gas flow rate distribution when disorder air-flow pipeline section, after rectification everywhere of rectification gas inlet hole
Not as good as the former equilibrium, there is certain influence to subsequent gas detection metrical instrument.Further, gas after rectifier rectification
When K is between 1.3~3.0, fluidised form is relatively more stable, and second rectifier that rear is arranged in is arranged in this region
Distance in, better rectification effect can be obtained.
It can be seen that fairing of the invention enables to air-flow by the installation site of optimization spacing and cowling panel
VELOCITY DISTRIBUTION is more uniform, so that the precision of flowmeter when detecting is higher.
Although being described in detail in conjunction with attached drawing to a specific embodiment of the invention, should not be construed as special to this
The restriction of the protection scope of benefit.In range described by claims, those skilled in the art are without creative work
The various modifications and deformation that can make still belong to the protection scope of this patent.
Claims (7)
1. a kind of gas pipeline rectifier, it is characterised in that: including shell and be successively set on intracorporal first cowling panel of shell,
Second cowling panel and third cowling panel；
Reserved section before being between first cowling panel and housing forward end is the first buffering between the first cowling panel and the second cowling panel
Section；It is the second breeze way between second cowling panel and third cowling panel；Section is reserved after being between third cowling panel and shell tail end；
There is cellular first rectification hole on first cowling panel, there is cellular second rectification on the second cowling panel
Hole has cellular third rectification hole on third cowling panel；
The length of reserved section is S1 before described, and the length of the first breeze way is S2, and the length of the second breeze way is S3, reserves section afterwards
Length be S4；The aperture of first rectification hole is R1, length d1, and the aperture of the second rectification hole is R2, length d2, and third is whole
The aperture of discharge orifice is R3, length d3；
It is describedIt is describedIt is describedK=1.3~3.
2. rectifier as described in claim 1, it is characterised in that: first rectification hole, the second rectification hole and third rectification
The wall thickness in hole is 0.1mm.
3. rectifier as described in claim 1, it is characterised in that: first rectification hole, the second rectification hole and third rectification
Hole is hexagonal hole.
4. rectifier as described in claim 1, it is characterised in that: the length of reserved section S1 is 2mm before described.
5. rectifier as described in claim 1, it is characterised in that: the length of reserved section S4 is 2mm after described.
6. rectifier as described in claim 1, it is characterised in that: the S2 is 7mm, and R1 4.8mm, D 50mm, d1 are
9.5mm, k value are 1.3125.
7. rectifier as described in claim 1, it is characterised in that: the S3 is 10mm, and R2 3.2mm, D 50mm, d3 are
12.5mm, k value are 2.7188.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300030.8A CN107167194B (en) | 2017-05-02 | 2017-05-02 | A kind of gas pipeline rectifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300030.8A CN107167194B (en) | 2017-05-02 | 2017-05-02 | A kind of gas pipeline rectifier |
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| CN107167194A CN107167194A (en) | 2017-09-15 |
| CN107167194B true CN107167194B (en) | 2019-07-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378707A (en) * | 2018-02-08 | 2018-08-10 | 无锡鼎加弘思饮品科技有限公司 | There is the flowmeter and its current stabilization method of current-stabilizing structure inside capsule coffee machine |
| EP4220097B1 (en) * | 2022-02-01 | 2024-01-03 | SICK Engineering GmbH | Flow measuring system |
| CN114440999B (en) * | 2022-04-11 | 2022-06-21 | 江苏高凯精密流体技术股份有限公司 | Flow-equalizing sleeve and flow meter equipped with same |
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|---|---|---|---|---|
| US4280360A (en) * | 1978-08-25 | 1981-07-28 | Nissan Motor Company, Limited | Fluid measuring device |
| CN2583642Y (en) * | 2002-12-06 | 2003-10-29 | 上海航天动力机械有限公司 | Flow regulating apparatus for gas flow measuring probe unit |
| CN1576802A (en) * | 2003-06-30 | 2005-02-09 | 欧姆龙株式会社 | Rectifier unit and rectifier attaching structure |
| CN1688871A (en) * | 2002-08-29 | 2005-10-26 | 株式会社山武 | Commutating device |
| CN2903927Y (en) * | 2006-04-29 | 2007-05-23 | 浙江麦姆龙仪表有限公司 | Split-combined rectifier |
-
2017
- 2017-05-02 CN CN201710300030.8A patent/CN107167194B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280360A (en) * | 1978-08-25 | 1981-07-28 | Nissan Motor Company, Limited | Fluid measuring device |
| CN1688871A (en) * | 2002-08-29 | 2005-10-26 | 株式会社山武 | Commutating device |
| CN2583642Y (en) * | 2002-12-06 | 2003-10-29 | 上海航天动力机械有限公司 | Flow regulating apparatus for gas flow measuring probe unit |
| CN1576802A (en) * | 2003-06-30 | 2005-02-09 | 欧姆龙株式会社 | Rectifier unit and rectifier attaching structure |
| CN2903927Y (en) * | 2006-04-29 | 2007-05-23 | 浙江麦姆龙仪表有限公司 | Split-combined rectifier |
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| CN107167194A (en) | 2017-09-15 |
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