CN101349580A - Large caliber vortex shedding flowmeter - Google Patents
Large caliber vortex shedding flowmeter Download PDFInfo
- Publication number
- CN101349580A CN101349580A CNA2007100440092A CN200710044009A CN101349580A CN 101349580 A CN101349580 A CN 101349580A CN A2007100440092 A CNA2007100440092 A CN A2007100440092A CN 200710044009 A CN200710044009 A CN 200710044009A CN 101349580 A CN101349580 A CN 101349580A
- Authority
- CN
- China
- Prior art keywords
- caliber
- small
- measuring tube
- vortex
- vortex shedding
- 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.)
- Granted
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
A large-caliber vortex follow meter comprises a large-caliber measuring tube and a small-caliber magneto-electric vortex follow meter, which is characterized in that the small-caliber magneto-electric vortex follow meter is inserted in the large-caliber measuring tube, wherein the caliber of the large-caliber measuring tube can be up to DN600, even be much larger. Compared with an original vortex follow meter under the same caliber and the same flow velocity, the invention can release higher frequency and stronger signals, namely that the novel flow meter has the advantages of high measuring precision, low measuring lower limit and short length of straight tube sections installed back and forth. And the core portion of a small-caliber sensor can return the factory or the monitoring management office at the premise that measuring tubes with the same specification are ensured to exchange (the measuring tube for the detection is consistent with user measuring pipes) under the condition of guaranteeing the installation direction of the small-caliber sensor consistent, and the problem that the magneto-electric vortex follow meter is difficult to deliver to be detected is solved, and the installation and detachment costs in detection is greatly reduced.
Description
Technical field
The present invention relates to a kind of vortex shedding flow meter, particularly a kind of utilization " toll bar " vortex principle design is used for measuring the heavy caliber novel vortex street flowmeter of the mass rate and the volumetric flow rate of closed conduct steam, gas and liquid medium.
Background technology
The vortex shedding flow meter principle of work is when medium in closed conduct flows through triangulo column 5 with certain speed, produce a vortex band of alternately arranging in back, triangulo column 5 both sides, be referred to as " toll bar vortex ", because of the alternately effect of vortex, thereby make detection probe 4 produce alterante stress, be encapsulated in the detection probe 4 piezoelectric element alterante stress effect under, produce alternation charge signal with the vortex same frequency, after delivering to that converter 1 is intelligent and handle by cable 2, realize steam, gas and liquid medium instantaneous delivery, communication between the demonstration of integrated flux and data on flows and the microsystem and control (schematic diagram is seen Fig. 1).
Large caliber vortex shedding flowmeter is big because of triangular prism width d at present, the position is relative nearer between detection probe and the triangulo column, release frequency with respect to small-bore flowmeter under same flow condition is less, the flow that discharges each frequency representative when promptly detecting is big, so exist signal difference, shortcoming such as accuracy of detection is low.Existing in addition large caliber vortex shedding flowmeter is all existing many weak points aspect the critical natures such as its flow detection scope, measuring accuracy, measurement lower limit.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of large caliber vortex shedding flowmeter, and is low to solve existing large caliber vortex shedding flowmeter accuracy of detection, shortcomings such as signal difference.
Technical matters to be solved by this invention can be achieved through the following technical solutions:
Large caliber vortex shedding flowmeter comprises footpath at a gulp measuring tube and small-bore vortex shedding flow meter, it is characterized in that, small-bore vortex shedding flow meter is inserted in the heavy caliber measuring tube.
In order to make the medium in the small flowmeter of flowing through not produce fluctuation, in the present invention, install a mozzle additional at the front end of the little measuring tube of described small-bore vortex shedding flow meter.
Described mozzle is straight pipe or is reducer pipe.When mozzle adopts reducer pipe, when detecting, can reduce flux lower limit, improve the measuring accuracy of flowmeter.
The little measuring tube of described small-bore vortex shedding flow meter is provided with a last arm that is connected as a single entity with it and a lower branch line mounting pipe, by gland nut detection probe is installed in the arm on described, the described arm of going up is connected with the joint flange of heavy caliber measuring tube by small-bore vortex shedding flow meter; Be provided with the lower branch line that is connected as a single entity with it in described heavy caliber measuring tube, be rotary with a set nut on the described lower branch line, this lower branch line is connected with the lower branch line mounting pipe by a direction fixed pin.
Because of necessarily needing promise to count the release frequency f of vortex in the scope and head-on concerning between the width d of flow rate of fluid V and vortex generation body, available following formula is expressed:
f＝Sr·V/d
Q＝3600×f/K
The release frequency V-flow velocity of f-toll bar vortex
D-triangulo column width S r-coefficient (being called Strouhal number)
Q-measuring tube inner fluid flow K-instrument coefficient
So, from above-mentioned expression formula, can know, in same pipeline during identical flow velocity (flow), as triangular prism fluoran stream surface width d value is diminished, the f value is corresponding can to become big, the distance between the detection probe that furthered simultaneously and the triangulo column, the signal amplitude value of the frequency f that is produced is big, and promptly signal is strengthened.
From structure of the present invention, can know, the manufacturer that originally can produce the above vortex shedding flow meter of bore DN200 is considerably less, it is also few to produce bore DN300 producer, adopts the vortex shedding flow meter bore of structure of the present invention to reach as high as DN600 now, even can do more; Because flowmeter of the present invention is under the same flow rate conditions of same bore, to compare with original vortex shedding flow meter, releasable frequency height, signal are strong, and promptly this new flowmeter has that measuring accuracy height, measurement lower limit are low, front and back install flow development length and advantage such as lack; Guaranteeing (guaranteeing to detect gets consistent with measuring tube with user's measuring channel) under the interchangeable prerequisite of same specification measuring tube, and keep installing under the situation of its small-bore sensor position direction unanimity, its small-bore Sensor core partly can be returned former factory or monitoring management department, can solve vortex shedding flow meter and inspect difficult problem by ready samples, and greatly reduce in the censorship and must mount and dismount expense.
Description of drawings
Fig. 1 is the vortex shedding flow meter schematic diagram.
Fig. 2 is the general structural representation of existing vortex shedding flow meter.
Fig. 3-1 is the structural representation of vortex shedding flow meter of the present invention.
Fig. 3-2 is the A place enlarged diagram of Fig. 3-1.
Be labeled as among the figure: 1 is signal processing converter, and 2 is signal wire, and 3 is little measuring tube, 4 is detection probe, and 5 is triangulo column, and 6 is gland nut, 7 is last arm, and 8 is the direction fixed pin, and 9 is set nut, 10 is lower branch line, and 11 is mozzle, and 12 is the joint flange of small-bore vortex shedding flow meter, 13 is last arm pressing plate, 14 is the joint flange of heavy caliber measuring tube, and 15 is the heavy caliber measuring tube, and 16 is the lower branch line mounting pipe.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Fig. 2 is the general structural representation of existing vortex shedding flow meter, mainly contains the compositions such as signal wire 2 of little measuring tube 3, triangulo column 5, detection probe 4, signal processing converter 1, access signal processing converter 1.
Referring to the vortex shedding flow meter of Fig. 3-1 and Fig. 3-2, comprise footpath at a gulp measuring tube 15 and small-bore vortex shedding flow meter, small-bore vortex shedding flow meter is inserted in the heavy caliber measuring tube 15.Concrete mounting means is that the joint flange 14 with the joint flange 12 of small-bore vortex shedding flow meter and heavy caliber measuring tube is connected by screw bolt and nut and gets final product.
In order to make the medium in the small-bore vortex shedding flow meter of flowing through not produce fluctuation, install a mozzle 11 additional at the front end of the little measuring tube 3 of small-bore vortex shedding flow meter.Mozzle 11 is straight pipe or is reducer pipe.The mozzle 11 of present embodiment adopts reducer pipe, can reduce flux lower limit when detecting, and improves the measuring accuracy of flowmeter.
In little measuring tube 3, triangulo column 5 is installed, and this little measuring tube 3 be provided with one be connected as a single entity with it on arm 7, the top of last arm 7 is installed on the joint flange 12 of small-bore vortex shedding flow meter by last arm pressing plate 13 and securing member.Compress detection probe 4 by gland nut 6 in last arm 7, the measuring head of detection probe 4 is inserted in the little measuring tube 3.
Lower branch line mounting pipe 16 is connected as a single entity with little measuring tube 3, and lower branch line 10 is connected as a single entity with big measuring tube 15, and its top has external thread, is rotary with set nut 9 on this external thread, and the upper end direction of passage fixed pin 8 of lower branch line 10 is connected with lower branch line mounting pipe 16.After set nut 9 is upwards locked and adjusted, can keep the pipeline center of small flowmeter consistent, can prevent the small flowmeter shake simultaneously with pipeline center's direction of big measuring tube 14.
Adopt the vortex shedding flow meter of Fig. 3-1, the core component of its detection (sensor) is smaller, can easily its extraction be returned the censorship of former factory or detection department, the present invention is guaranteeing on big measuring tube 15 of user and the consistent basis of detection with little measuring tube 3, made a large amount of commutativitys, comparative tests, its accuracy of detection unitarity reaches more than 98%, realize a heavy caliber censorship difficult problem very easily, this invention is compared with former vortex shedding flow meter, has the frequency of detection height, characteristics such as signal is strong, promptly has the measuring accuracy height simultaneously, measurement lower limit is low, characteristics such as flow development length weak point are installed in front and back, be particularly suitable for the metering of large diameter pipeline flow, can realize expanding to more bigbore vortex shedding flow meter.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (4)
1, large caliber vortex shedding flowmeter comprises footpath at a gulp measuring tube and small-bore electromagnetic vortex sjeddomg flowmeter, it is characterized in that, small-bore vortex shedding flow meter is inserted in the heavy caliber measuring tube.
2, large caliber vortex shedding flowmeter according to claim 1 is characterized in that, installs a mozzle additional at the front end of the little measuring tube of described small-bore vortex shedding flow meter.
3, large caliber vortex shedding flowmeter according to claim 2 is characterized in that, described mozzle is a straight pipe.
4, large caliber vortex shedding flowmeter according to claim 2 is characterized in that, described mozzle is a reducer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100440092A CN101349580B (en) | 2007-07-19 | 2007-07-19 | Large caliber vortex shedding flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100440092A CN101349580B (en) | 2007-07-19 | 2007-07-19 | Large caliber vortex shedding flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101349580A true CN101349580A (en) | 2009-01-21 |
| CN101349580B CN101349580B (en) | 2011-03-02 |
Family
ID=40268454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100440092A Active CN101349580B (en) | 2007-07-19 | 2007-07-19 | Large caliber vortex shedding flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101349580B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424104A (en) * | 2015-12-25 | 2016-03-23 | 燕山大学 | Double-way self-correcting vortex street effect flow sensor |
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
| CN112833969A (en) * | 2021-01-29 | 2021-05-25 | 江苏华尔威科技集团有限公司 | High-precision vortex shedding flowmeter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2112804U (en) * | 1991-07-15 | 1992-08-12 | 天津市自动化仪表三厂 | Plug-in type electromagnetic flow sensor |
| CN2239014Y (en) * | 1995-03-06 | 1996-10-30 | 上海弗洛米特技术开发部 | Large calibre inserted wortex street flowmeter |
| US6752027B1 (en) * | 1999-04-06 | 2004-06-22 | The Foxboro Company | Vortex flowmeter including removeable and replaceable flow-obstruction element |
| CN2569105Y (en) * | 2002-07-23 | 2003-08-27 | 李吉男 | Vortex street generating body integrated inserting vortes street flowmeter |
| CN2602349Y (en) * | 2003-02-28 | 2004-02-04 | 詹益鸿 | Plug-in type electromagnetic swirl flowmeater |
| US7073394B2 (en) * | 2004-04-05 | 2006-07-11 | Rosemount Inc. | Scalable averaging insertion vortex flow meter |
-
2007
- 2007-07-19 CN CN2007100440092A patent/CN101349580B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424104A (en) * | 2015-12-25 | 2016-03-23 | 燕山大学 | Double-way self-correcting vortex street effect flow sensor |
| CN105424104B (en) * | 2015-12-25 | 2018-07-06 | 燕山大学 | A kind of two-way self-correcting vortex street effect flow sensor |
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
| CN112833969A (en) * | 2021-01-29 | 2021-05-25 | 江苏华尔威科技集团有限公司 | High-precision vortex shedding flowmeter |
| CN112833969B (en) * | 2021-01-29 | 2024-04-02 | 江苏华尔威科技集团有限公司 | High-precision vortex shedding flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101349580B (en) | 2011-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100538307C (en) | A kind of wind tunnel calibration method for large flow gas pipeline averaging velocity tube flowmeter | |
| CN102077061B (en) | Velocity-enhanced flow measurement | |
| CN101178347B (en) | Narrow slit Venturi throttling set and gas-liquid two-phase flow measuring system | |
| CN101382445B (en) | Double differential pressure throttle moisture measuring device | |
| RU2451911C2 (en) | Measuring system for medium flowing in process line | |
| CN109141562B (en) | Natural gas moisture measurement device and method based on in-pipe phase separation and phase separation | |
| CN202483554U (en) | Oil well produced-fluid optical fiber measuring system | |
| CN101349580B (en) | Large caliber vortex shedding flowmeter | |
| US20160071639A1 (en) | Magnet keeper assembly and related method | |
| CN1989394A (en) | Multi-vortex flow meter | |
| CN204514402U (en) | A kind of differential pressure mass flowmeter for vortex street | |
| CN1936506A (en) | Small section branch-flow measuring method for large-diameter gas flow and apparatus thereof | |
| CN201081746Y (en) | Magnetoelectric vortex shedding flow meter | |
| CN201081738Y (en) | Vortex shedding flow meter | |
| CN101334302B (en) | Heavy caliber electromagnetic vortex sjeddomg flowmeter | |
| CN101349581B (en) | Insert type flow measuring device based on MEMS sensor | |
| CN201740553U (en) | Double-parameter mass flow meter | |
| CN209043381U (en) | The replaceable vortex-shedding meter of eddy generator | |
| CN103278204A (en) | Micro mass flow sensor with fusion of Coriolis effect and differential pressure effect | |
| CN209280059U (en) | A kind of ultrasonic type gas-liquid two-phase measuring device | |
| CN204649252U (en) | A kind of taper mass flowmeter for vortex street | |
| CN201413164Y (en) | Ball valve insertion type cone shaped flow meter | |
| CN1247984C (en) | Liquid-liquid two-phase flow measuring method and device | |
| CN106197596A (en) | A kind of reinforcing oil well mud flow meter and mounting bracket and mounting bracket using method | |
| CN104280076A (en) | High-precision large-diameter vortex flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |