CN102116649A - Ultrasonic vortex flow meter and installation method thereof - Google Patents
Ultrasonic vortex flow meter and installation method thereof Download PDFInfo
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- CN102116649A CN102116649A CN2011100048276A CN201110004827A CN102116649A CN 102116649 A CN102116649 A CN 102116649A CN 2011100048276 A CN2011100048276 A CN 2011100048276A CN 201110004827 A CN201110004827 A CN 201110004827A CN 102116649 A CN102116649 A CN 102116649A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000009434 installation Methods 0.000 title claims abstract description 8
- 238000002604 ultrasonography Methods 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 23
- 230000005484 gravity Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 18
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 30
- 239000012530 fluid Substances 0.000 description 8
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
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- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The invention discloses an ultrasonic vortex flow meter and an installation method thereof. The ultrasonic vortex flow meter comprises a meter, a connecting rod and a vortex detection part, wherein the meter is connected with the vortex detection part arranged below the meter through the connecting rod; the connecting rod is internally provided with a cable for connecting an internal circuit of the meter with an ultrasonic sensor in the vortex detection part; the vortex detection part further comprises a vortex generation channel and a vortex generator arranged in the vortex generation channel; the vortex generator is a triangular prism body, and two ends of the triangular prism body are fixed on two opposite side walls of the vortex generation channel; the cross section of the triangular prism body is parallel to the air flow direction of a detected pipe; the upper part of the connecting rod is provided with a flange for connecting the detected pipe as well as a double-lock-screw structure; and the flow meter is installed by utilizing the double-lock-screw structure and the flange. The ultrasonic vortex flow meter disclosed by the invention has the advantages of remarkably high sensitivity, ultra-low flow velocity measurement capability, strong anti-jamming capability and high measurement accuracy.
Description
Technical field
The present invention relates to a kind of industrial fluids flow measurement device, relate in particular to the high precision of the ultralow flow rate of gas flow of a kind of energy measurement, highly sensitive ultrasound wave vortex shedding flow meter.
Background technology
For the industrial gasses flow measurement, especially for example flow measurement of hydrogen, acetylene or the like of some explosive, inflammable high energy gas, because safety factor limits these gases and often can not improve flow velocity by supercharging, therefore need accurately to measure the measurement mechanism of the gas flow under the very slow operating mode of this flow velocity.The generation of ultrasonic vortex shedding flow meter flow signal utilizes ultrasound wave to detect the frequency that vortex takes place in fluid based on the principle of Karman vortex street.Ultrasonic vortex shedding flow meter is a kind of of velocity flowmeter, is mainly used in the measurement of ultralow gas flow rate aspect.
Chinese patent ZL02242807.0 discloses the whole plug-in type vortex shedding flow meter of a kind of vortex street sounding body, its structure is to connect the vortex street detection bodies in the supporting linkage lower end, the connecting link upper end passes support from the pipeline that is provided with ball valve and seal assembly and connects the gauge outfit body, wears lead in the supporting linkage and connects gauge outfit body and detection bodies.Its shortcoming is a no affixed point between connecting link lower end and tested pipeline, and therefore, under the percussive action of fluid, connecting link lower end vortex street detection bodies tends to do slight swing.And directly with connecting link lower end and tested pipeline affixed after, cause trouble can for again the maintenance that continues to flow.
Chinese patent ZL20082007128.8 discloses the ultrasonic vortex shedding flow meter of the strong new plug-in of a kind of antijamming capability, to improve measuring accuracy.Its structure is to connect the vortex street detection bodies in the supporting linkage lower end, and the supporting linkage upper end is passed pedestal and connect the indicator gauge body, connects the indicator gauge body on the lead of cross-under in the supporting linkage, connects the vortex street detection bodies down.The vortex street detection bodies is made up of stream tube entire body, vortex shedder and ultrasonic transmitter and ultrasonic receiver, vortex shedder is the trapezoidal column structure, radially be welded in the channel flow entire body, ultrasonic transmitter and ultrasonic receiver are installed in the flow body sidewall that the body downstream takes place.The pipe under test center that during use the whole insertion of vortex street detection bodies is complementary.When fluid flows through, the downstream that body takes place in circulation duct produces eddy current, be positioned at ultrasonic transmitter that the fluid sidewall installs, signal that ultrasonic receiver is gathered only limit to take place body ultrasonic whirlpool signal, thereby got rid of that direct current fluid exerts an influence to the whirlpool signal and the measuring error brought, and then improved the accuracy of detection of flowmeter.
Its shortcoming is that sampling is limited in the small range because the vortex street detection bodies is positioned at the center of tested pipeline.Though improved accuracy of detection, reduced the sensitivity that detects, under the low flow velocity operating mode of gas, almost can't detect.Because the molecule of general gas is all very little, the gap is relatively large between the molecule, and the eddy current that produces during by this vortex street detection bodies under low flow velocity, ultralow flow condition is less, though have the gas stream mistake this moment, sonac can't be experienced.
Summary of the invention
The technical problem to be solved in the present invention provides and had a kind ofly not only satisfied high precision, but also has the ultrasound wave vortex shedding flow meter of higher sensitivity.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of ultrasound wave vortex shedding flow meter, comprise gauge outfit, connecting link and vortex street test section, this gauge outfit is connected by this connecting link this vortex street test section with its below, is connected with cable in this connecting link and connects the internal circuit of this gauge outfit and the ultrasonic sensor in this vortex street test section.This vortex street test section also comprises vortex street generation passage and is located at the interior vortex street generator of this vortex street generation passage.This vortex street generator is that triangulo column and cylinder two ends are fixed on two opposing sidewalls of this vortex street generation passage, and the transverse cross-section parallel of this triangulo column is in the airflow direction of tested pipeline.This connecting link top is provided with flange and the tight screw structural of twin-lock that is used for connecting this tested pipeline.
For above-mentioned vortex shedding flow meter, this vortex street test section also is included in the gas extractor that this vortex street generation passage front end fuses with it.
For above-mentioned vortex shedding flow meter, this gas extractor is the bucket shape passage.
For above-mentioned vortex shedding flow meter, this gas extractor inlet and this vortex street generation channel cross-section are rectangle, circle or oval, and this gas extractor inlet area is greater than the area of this vortex street generation channel cross-section.
For above-mentioned vortex shedding flow meter, the xsect of this vortex street generator is an isosceles oxygon.
For above-mentioned vortex shedding flow meter, the plane that the summit of this isosceles oxygon is parallel to the inlet place of this vortex street generation passage towards the inlet and the base of this vortex street generation passage.
For above-mentioned vortex shedding flow meter, the center of gravity of the xsect of this vortex street generator equates to the distance of two opposing sidewalls of this vortex street generation passage.
For above-mentioned vortex shedding flow meter, between the center of gravity of this vortex street generator is to the distance on the plane at the inlet place of this vortex street generation passage 1 times to 10 times to the distance on the plane at the outlet place of this vortex street generation passage.
For above-mentioned vortex shedding flow meter, this ultrasonic sensor is installed on two opposing sidewalls of this vortex street generation passage in two symmetrical holes and periphery is coated with airtight cable box.
The installation method of above-mentioned ultrasound wave vortex shedding flow meter comprises the steps:
By the tight screw structural of this twin-lock loosening or that lock on this connecting link this vortex street test section integral body is inserted tested pipeline and adjusted its position in tested pipeline;
This ultrasound wave vortex shedding flow meter is connected with tested pipeline by this flange.
For the installation method of above-mentioned ultrasound wave vortex shedding flow meter, this vortex street test section is adjusted to the center of tested pipeline.
Advantage and characteristics that technical solution of the present invention is main are:
(1) ultrasound examination vortex frequency: unique Ultrasonic Detection body, detection signal is collected in the fluid state in tested pipeline centre, and the tube wall vibration is minimum to its influence;
(2) the outstanding ultralow fluid-velocity survey ability of high sensitivity, and have very strong antijamming capability and measuring accuracy.
Description of drawings
Fig. 1 is the whole sectional view of the described ultrasound wave vortex shedding flow meter of one embodiment of the invention;
Fig. 2 is that view is in the past seen along gas flow in the vortex street test section of ultrasound wave vortex shedding flow meter shown in Figure 1;
Fig. 3 is that the vortex street test section of ultrasound wave vortex shedding flow meter shown in Figure 1 is from seeing view in the past perpendicular to the direction of gas flow.
Embodiment
Below, describe the described ultrasound wave vortex shedding flow meter of one embodiment of the invention with reference to the accompanying drawings.
As shown in Figure 1, ultrasound wave vortex shedding flow meter of the present invention comprises gauge outfit 1, connecting link 6 and vortex street test section.Gauge outfit 1 is connected by the vortex street test section of connecting link 6 with its below, is connected with cable in the connecting link 6 and connects the internal circuit of gauge outfit 1 and the ultrasonic sensor 8 in the vortex street test section.
Connecting link 6 tops are provided with flange 5 and the tight screw structural of twin-lock.Ultrasound wave vortex shedding flow meter of the present invention is connected with tested pipeline by flange 5, and can regulate the insertion position of vortex street test section in tested pipeline by the screw 3 and 4 on the loosening locking connecting link 6, make vortex street generation passage 11 and vortex street generator 12 can be positioned at the center of detected gas circulation duct and can satisfy the online needs that continue to flow and detect.The tight screw structural of twin-lock has guaranteed the leakproofness of instrument, better security.
Between tight screw structural of twin-lock and gauge outfit 1, be provided with gas flow indicating device 2, be carved with arrow points above, the flow direction of expression gas.
As shown in Figures 2 and 3, the vortex street test section comprises connecting link lower end colligator 7, ultrasonic sensor 8, airtight cable box 9, gas extractor 10, vortex street generation passage 11 and vortex street generator 12.
Preferably, vortex street generation passage 11 places the center of tested pipeline, and is concentric with gas pipeline.The xsect of vortex street generation passage 11 is rectangle, ellipse or circular.The front end of vortex street generation passage 11 is gas extractors 10, and the two is by casting or be welded into one, and gas flows into vortex street generation passage 11 again through gas extractor 10.Gas extractor 10 is the bucket shape passage, consistent with the shape of cross section of vortex street generation passage 11, the inlet of gas extractor 10 becomes rectangle, ellipse or circular, the area on plane, air intake opening place is greater than the cross-sectional area of vortex street generation passage 11, the front end inlet of the end port of gas extractor 10 vortex street generation just passage 11.
Be provided with vortex street generator 12 in the vortex street generation passage 11.Vortex street generator 12 is preferably by casting or being weldingly fixed in the vortex street generation passage 11.Vortex street generator 12 is for triangulo column and cylinder two ends are fixed on two opposing sidewalls of vortex street generation passage 11, and the xsect of triangulo column is parallel to airflow direction all the time.Preferably, the xsect of vortex street generator 12 is an isosceles oxygon, the summit of oxygon is near the front end inlet of vortex street generation passage 11, and the base of oxygon is parallel to the plane at front end inlet place of vortex street generation passage 11 and the plane at back outlet place.The center of gravity of the xsect of vortex street generator 12 equates to the distance of 11 two opposing sidewalls of vortex street generation passage.Between the center of gravity of vortex street generator 12 is to the distance on the plane at the front end inlet place of vortex street generation passage 11 1 times to 10 times to the distance on the plane at the back outlet place of vortex street generation passage 11.
Below, based on the composition structure of above-mentioned ultrasound wave vortex shedding flow meter its installation and measuring process are described.
When measuring flow with above-mentioned ultrasound wave vortex shedding flow meter, the tested pipeline center that is complementary is inserted and adjusted to vortex street test section integral body, whole flowmeter is connected with tested pipeline by flange 5.When tested low speed, Ultra-Low Speed gas stream during, quicken, flow to vortex street generator 12 after the rectification through gas extractor 10 multiplications through the test section of flowmeter.At this moment, the vortex break-off that vortex street generator 12 front and rear part branch cause is realized the vibration of fluid being strengthened the best of breed that same-phase superposes at vortex street generator 12 rear portions on every side, has reduced the lower limit of metering, has improved the sensitivity that detects.Utilize the mobile vibration of vortex street generator 12 both sides to have the characteristics of 180 ° of phase differential simultaneously, the method that suppresses common mode interference signal with differential generator improves signal to noise ratio (S/N ratio), has further improved the interference free performance of flowmeter.
Ultrasound wave vortex shedding flow meter of the present invention adopts the tight screw of twin-lock to add the structure that flange connects, and has made things convenient for dismounting when continuing to flow maintenance, has also improved the anti-explosion safety grade of instrument.Novel vortex street detection bodies had both satisfied highly sensitive requirement, had also further improved the precision of metering.This ultrasound wave vortex shedding flow meter is fit to the measurement to gas flow very much, the measurement of particularly ultralow flow velocity, low flow rate of gas.Certainly the measurement that more can satisfy the heavy caliber gas flow waits other various occasions.
Ultrasound wave vortex shedding flow meter of the present invention has very wide range ratio and very little insertion loss.Use suits large area to popularize.
Claims (11)
1. ultrasound wave vortex shedding flow meter, comprise gauge outfit, connecting link and vortex street test section, described gauge outfit is connected by the described vortex street test section of described connecting link with its below, be connected with cable in the described connecting link and connect the internal circuit of described gauge outfit and the ultrasonic sensor in the described vortex street test section, described vortex street test section also comprises vortex street generation passage and is located at the interior vortex street generator of described vortex street generation passage, it is characterized in that, described vortex street generator is that triangulo column and cylinder two ends are fixed on two opposing sidewalls of described vortex street generation passage, the transverse cross-section parallel of described triangulo column is in the airflow direction of tested pipeline, and described connecting link top is provided with flange and the tight screw structural of twin-lock that is used for connecting described tested pipeline.
2. vortex shedding flow meter as claimed in claim 1 is characterized in that, described vortex street test section also is included in the gas extractor that described vortex street generation passage front end fuses with it.
3. vortex shedding flow meter as claimed in claim 2 is characterized in that, described gas extractor is the bucket shape passage.
4. vortex shedding flow meter as claimed in claim 3, it is characterized in that, described gas extractor inlet and described vortex street generation channel cross-section are rectangle, circle or oval, and described gas extractor inlet area is greater than the area of described vortex street generation channel cross-section.
5. vortex shedding flow meter as claimed in claim 1 is characterized in that, the xsect of described vortex street generator is an isosceles oxygon.
6. vortex shedding flow meter as claimed in claim 5 is characterized in that, the plane that the summit of described isosceles oxygon is parallel to the inlet place of described vortex street generation passage towards the inlet and the base of described vortex street generation passage.
7. as claim 5 or 6 described vortex shedding flow meters, it is characterized in that the center of gravity of the xsect of described vortex street generator equates to the distance of two opposing sidewalls of described vortex street generation passage.
8. as claim 1,5 or 6 described vortex shedding flow meters, it is characterized in that, between the center of gravity of described vortex street generator is to the distance on the plane at the inlet place of described vortex street generation passage 1 times to 10 times to the distance on the plane at the outlet place of described vortex street generation passage.
9. vortex shedding flow meter as claimed in claim 1 is characterized in that, described ultrasonic sensor is installed on two opposing sidewalls of described vortex street generation passage in two symmetrical holes and periphery is coated with airtight cable box.
10. the installation method of the described ultrasound wave vortex shedding flow meter of above-mentioned arbitrary claim is characterized in that, comprises the steps:
By the tight screw structural of described twin-lock loosening or that lock on the described connecting link described vortex street test section integral body is inserted tested pipeline and adjusted its position in tested pipeline;
Described ultrasound wave vortex shedding flow meter is connected with tested pipeline by described flange.
11. the installation method of ultrasound wave vortex shedding flow meter as claimed in claim 10 is characterized in that, described vortex street test section is adjusted to the center of tested pipeline.
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| CN2011100048276A CN102116649A (en) | 2011-01-11 | 2011-01-11 | Ultrasonic vortex flow meter and installation method thereof |
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| CN2011100048276A CN102116649A (en) | 2011-01-11 | 2011-01-11 | Ultrasonic vortex flow meter and installation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818596A (en) * | 2012-08-23 | 2012-12-12 | 郑州光力科技股份有限公司 | Vortex shedding flowmeter and acoustic sensor thereof |
| CN105737919A (en) * | 2016-02-02 | 2016-07-06 | 贺成 | Insertion type ultrasonic flowmeter with washing sprayer |
| CN105737920A (en) * | 2016-02-02 | 2016-07-06 | 贺成 | Insertion type ultrasonic flowmeter |
| CN105758476A (en) * | 2016-02-02 | 2016-07-13 | 贺成 | Insertion type ultrasonic flowmeter with flushing spray-head and submerged camera |
| CN107014448A (en) * | 2017-04-06 | 2017-08-04 | 上海新拿电子科技有限公司 | Probe of ultrasonic flowmeter and probe rod type ultrasonic flowmeter |
| CN107490406A (en) * | 2017-08-22 | 2017-12-19 | 上海诺仪表有限公司 | A kind of ultrasonic vortex street effusion meter |
| CN107740752A (en) * | 2017-11-21 | 2018-02-27 | 北京金风科创风电设备有限公司 | Surround apparatus and method for suppressing vibration of building envelope |
| CN108020284A (en) * | 2017-12-15 | 2018-05-11 | 哈尔滨派立仪器仪表有限公司 | Vibration Resistant Insertion Thermal Gas Mass Flow Meter |
| WO2018214839A1 (en) * | 2017-05-21 | 2018-11-29 | 苏健隆 | Flow rate flowmeter, and method for measuring flow rate and flow amount |
| US10801872B1 (en) | 2019-08-06 | 2020-10-13 | Surface Solutions Inc. | Methane monitoring and conversion apparatus and methods |
| CN114791408A (en) * | 2021-01-25 | 2022-07-26 | 西南科技大学 | Ultrahigh-speed powder pipeline detection device based on vortex street excitation shaping |
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| CN201945333U (en) * | 2011-01-11 | 2011-08-24 | 上海科洋科技发展有限公司 | Ultrasonic vortex flowmeter |
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2011
- 2011-01-11 CN CN2011100048276A patent/CN102116649A/en active Pending
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| JPH0295213A (en) * | 1988-09-30 | 1990-04-06 | Oval Eng Co Ltd | Vortex flowmeter |
| CN2585189Y (en) * | 2002-12-05 | 2003-11-05 | 房继春 | Supersonic Doppler vortex street flowmeter |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818596A (en) * | 2012-08-23 | 2012-12-12 | 郑州光力科技股份有限公司 | Vortex shedding flowmeter and acoustic sensor thereof |
| CN105737919A (en) * | 2016-02-02 | 2016-07-06 | 贺成 | Insertion type ultrasonic flowmeter with washing sprayer |
| CN105737920A (en) * | 2016-02-02 | 2016-07-06 | 贺成 | Insertion type ultrasonic flowmeter |
| CN105758476A (en) * | 2016-02-02 | 2016-07-13 | 贺成 | Insertion type ultrasonic flowmeter with flushing spray-head and submerged camera |
| CN107014448A (en) * | 2017-04-06 | 2017-08-04 | 上海新拿电子科技有限公司 | Probe of ultrasonic flowmeter and probe rod type ultrasonic flowmeter |
| WO2018214839A1 (en) * | 2017-05-21 | 2018-11-29 | 苏健隆 | Flow rate flowmeter, and method for measuring flow rate and flow amount |
| CN107490406A (en) * | 2017-08-22 | 2017-12-19 | 上海诺仪表有限公司 | A kind of ultrasonic vortex street effusion meter |
| CN107740752A (en) * | 2017-11-21 | 2018-02-27 | 北京金风科创风电设备有限公司 | Surround apparatus and method for suppressing vibration of building envelope |
| CN108020284A (en) * | 2017-12-15 | 2018-05-11 | 哈尔滨派立仪器仪表有限公司 | Vibration Resistant Insertion Thermal Gas Mass Flow Meter |
| US10801872B1 (en) | 2019-08-06 | 2020-10-13 | Surface Solutions Inc. | Methane monitoring and conversion apparatus and methods |
| CN114791408A (en) * | 2021-01-25 | 2022-07-26 | 西南科技大学 | Ultrahigh-speed powder pipeline detection device based on vortex street excitation shaping |
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Application publication date: 20110706 |