CN1834591A - Built-in conical throttling gear - Google Patents
Built-in conical throttling gear Download PDFInfo
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- CN1834591A CN1834591A CN 200610042694 CN200610042694A CN1834591A CN 1834591 A CN1834591 A CN 1834591A CN 200610042694 CN200610042694 CN 200610042694 CN 200610042694 A CN200610042694 A CN 200610042694A CN 1834591 A CN1834591 A CN 1834591A
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Abstract
The invention relates to a flux meter, especially a inner concealing cone throttling set that includes a sensor device, and flow guiding cone, front pressure collecting pipe, front pressure measuring pipe, front pressure measuring head. It has low request to the straight pipe section and could measure wide dynamic range high accuracy flow and is suitable to kinds of liquid.
Description
Technical field
The present invention relates to a kind of flow instrument, particularly a kind of built-in conical throttling gear that can measure various liquids and gases flows.
Background technology
Domestic and international existing differential pressure flowmeter comprises that the traditional orifice plate of GB/T2624-93, nozzle, Venturi tube and import plug-in type Verabar are surpassing more than the DN1200 without experimental data and relevant computing formula, have following several problem:
1) old of ISO 5167 test datas: the data that adopt among the ISO 5167 are the result of the test of the thirties mostly, today is the throttling arrangement manufacturing technology no matter, flow test equipment and experimental technique have huge progress, re-start to test systematically to obtain more that pinpoint accuracy and more reliable data are necessary. Enter eighties US and European and all test on a large scale, ISO 5167 lays the first stone for revision.
2) problem of stipulating about flow development length among the ISO 5167: when ISO votes ISO 5167 through, negative vote has been thrown by the U.S., its main cause is that the regulation to flow development length has different opinions, and this problem should be one of subject matter of ISO 5167 revisions.
3) scientific problem of every regulation among the ISO 5167: the factor that affects the throttling arrangement efflux coefficient is many especially, mainly contain ratio beta, pressure obtaning device, Reynolds number, throttling element setting-up eccentricity degree, front and back choked flow piece type and flow development length, orifice plate ingress edge sharpness, tube wall roughness, Fluid Flow in A turbulivity of aperture and caliber etc., the many factors impact is intricate, the difficult parameters that has is with direct measurement, therefore some regulation is not scientifically to determine in the standard, but in order to agree, have to determine artificially. Famous flow expert spencer (E.A.Spencer) proposes a series of problems that should again examine, distributes and the effect of flow conditioner etc. such as orifice plate glacing flatness, concentricity, square edge sharpness, pipe roughness, upstream flow rate.
4) problem that improves about the throttle differential flowmeter measuring accuracy: in view of the throttle type throttle differential flowmeter occupies critical role in flowmeter, it is significant to improve its measuring accuracy. U.S. McCROMETER, the V-type cone flow meter of Japanese TOKYO KEISO development all exists certain problem and limitation on the structure He on the experimental data on measuring point. All previous International Academic Conference think flow measurement worker, hydrodynamics and computer technology worker close cooperation are tackled key problems jointly could head it off. Creation has the reliable of independent intellectual property rights, large-caliber flow instrument.
In addition, domestic and international existing differential pressure flowmeter comprises the traditional orifice plate of GB/T2624-93, nozzle, Venturi tube and import plug-in type Verabar because range of dynamic measurement is little, when high velocity fluid flow, the problem that has the poor stability of measuring flow has directly affected service precision. In addition, existing flow easily stops up when measuring dirty medium because straight length requires will reach more than the front 2.5D at least, and the pressure loss is large, makes repair density increasing etc., therefore need to measuring to some extent requirement of fluid, limit the scope of application of its flow measurement.
Summary of the invention
The object of the invention provides a kind of built-in conical throttling gear, and its straight length requires low, can measure the flowmeter that dynamic range is large, precision is high and adapt to various fluid measurements.
The object of the present invention is achieved like this, built-in conical throttling gear, it comprises the sensing device for measuring flow, with the measurement mechanism that is electrically connected with sensing device, it is characterized in that: sensing device 2 comprises body 1, guiding cone in the body 1, wherein guiding cone is divided into precentrum, straight tube, posterior pyramids and empennage and is integrally formed; Guiding cone is connected with body by empennage; Described body 1 skin has front remittance pressure pipe 5, and converges pressure pipe 5 in the past and extend the front pressure-measuring pipe 6 of precentrum to sensing device body 1 interior edge, and front pressure-tapping nozzle 7 is arranged on the front remittance pressure pipe 5, and front pressure-tapping nozzle 7 is connected with the high-pressure side of measurement mechanism 3; At front pressure-measuring pipe 6 the front pressure-measuring head 8 parallel with fluid arranged; There is perforate 12 front pressure-measuring head 8 ends; Comprise the rear remittance pressure pipe 9 around 1 an outer week of body, and 1 interior edge extends the rear pressure-measuring pipe 10 of straight tube from rear remittance pressure pipe 9 to body; Have on the rear pressure-measuring pipe 10 and become vertical perforate 12 with flow direction; Rear pressure-tapping nozzle 11 is arranged on the rear remittance pressure pipe 9, and rear pressure-tapping nozzle 11 is connected with measurement mechanism 3 low-pressure ends; Front pressure-measuring head 8 and rear pressure-measuring pipe 10 mutual dislocation in the body 1.
Described edge reaches front pressure-measuring pipe 6 in the sensing device body 1 between the 2-8 root, evenly distributes at angle each other.
Described front pressure-measuring pipe has front pressure-measuring head 8, and front pressure-measuring head 8 is arranged parallel to each other between 2-6.
Perforate 12 axis of described rear pressure-measuring pipe 10 are vertical with flow direction.
Perforate 12 apertures on described rear pressure-measuring pipe 10 calibers are between Φ 3mm～Φ 8mm, and the number of openings is between 3-5.
Pressure-measuring head perforate 12 10mm before the corner after the described bent-tube boiler.
There are flange 4 joints on described body 1 both sides.
Table 1 has provided the flow instrument contrast of the present invention and other model. Can find out that therefrom main feature of the present invention is:
1. its fluid resistance is very little under the same conditions, makes system's operation below the about 100Pa of crushing
Business efficiency greatly improve, more energy-conservation more than 30% than traditional flowmeter.
| The flowmeter title | Multi-point flow counter of trapezoid | The import Verabar | Orifice plate, Venturi tube |
| Model | BWY-FJ-T | BWY-series | |
| Reference to standard | Enterprise's mark | GB/T2624-93 | |
| The scope of application | DN100～6000mm | DN100～4000mm | DN50～1200mm |
| The diameter ratio | No requirement (NR) | No requirement (NR) | 0.3≤β≤0.75 |
| The pressure loss | 100Pa | ≤100Pa | 25%～50% of Δ P |
| Ways of measure pressure | Outer circular chamber | Without ring casing | Corner connection, flange, span D and D/2 |
| | 15∶1 | 10∶1 | 5∶1 |
| Precision | 0.2 | 1 | 1 grade |
| Flowmeter length form | 500(mm) | Plug-in type | Two flange thicknesses (orifice plate) |
| About caliber 5D (Venturi tube) | |||
| The straight length requirement | 0.5D behind the front 1.5D | 2.5D behind the front 4D | 5D behind the front 10D |
| Advantage | Precision is high, and the front and back straight length requires low, can measure than visceral-qi body or various liquid. (blast furnace gas, flue gas, water, oil) has outer blow device. | The pressure loss is little easy for installation | Cost is low |
| Shortcoming | Cost is high | Can not measure than visceral-qi body and liquid (as: blast furnace gas, coke-stove gas, flue gas etc.) | The permanent pressure loss is large, and range ratio is little, precision is low, easy obstruction |
| Main application | The measurement of various liquid and gas | High flow rate, Large Diameter Pipeline, clean medium | Various liquid or clean gas |
| The flow velocity requirement | 10-100m/s | 10-30m/s | 15-50m/s |
| Measuring principle | Differential pressure type, fluid all pass through measurement mechanism | Segment fluid flow passes through measurement mechanism | Fluid all passes through measurement mechanism |
| Pressure port | More than 16 | 4 | 1～4 point |
2. the wide resolution ratio of range ability is high, applicable to various liquid or gas.
3. certainty of measurement is high, stable performance, and stagnation pressure, hydrostatic measuring point all are higher than the flowmeter of other form far away more than 16 points, and outer circular chamber further improves pressure stability.
4. the front and back straight length requires the short straight length that almost need not, so because multimetering requires relative reduce to straight length.
5. can pass through blow valve port H, L end field calibration (with the bernoulli equation basic principle according to take experimental data as the basis).
6. flowmeter length weak point≤500mm (no matter duct size).
7. pressure pipe of the present invention adopts all steel structure and surface to be coated with non-sticking lining product is improved service life greatly.
Description of drawings
The present invention will be further described below in conjunction with the embodiment accompanying drawing.
Fig. 1 is embodiment 1 structural representation.
Among the figure: 1, body; 2, sensing device; 3, measurement mechanism; 4, flange; 5, front remittance pressure pipe; 6, front pressure-measuring pipe; 7, front pressure-tapping nozzle; 8, front pressure-measuring head; 9, rear remittance pressure pipe; 10, rear pressure-measuring pipe; 11, rear pressure-tapping nozzle; 12, perforate; 13, axis; 14, flow direction; 15, blow valve port; 16, precentrum; 17, straight tube; 18, posterior pyramids; 19, empennage.
The specific embodiment
As shown in Figure 1, provided a kind of structure of sensing device 2, sensing device 2 comprises body 1, the guiding cone in the body 1, and wherein guiding cone is divided into precentrum 16, straight tube 17, posterior pyramids 18 and empennage 19 and is integrally formed; Guiding cone is connected with body 1 by empennage 19; Body 1 is round tubular body, and front and back are connected with fluid line by flange 4. Body 1 converges pressure pipe 5 before there is hollow in an outer week, and converges pressure pipe 5 in the past and extend the front pressure-measuring pipe 6 of precentrum 16 to body 1 interior edge, and front pressure-measuring pipe 6 evenly distributes between the 2-8 root each other at angle. The front pressure-measuring head 8 of 1-4 root is arranged on the every front pressure-measuring pipe 6, and front pressure-measuring head 8 is arranged in parallel each other and flow direction 14 flows in the other direction, and there is perforate 12 front pressure-measuring head 8 ends, and the axis 13 of perforate 12 is parallel with flow direction 14. Front pressure-tapping nozzle 7 is arranged on the front remittance pressure pipe 5, and the high-pressure side of the measurement mechanism 3 among front pressure-tapping nozzle 7 and the figure is connected. With the front remittance pressure pipe 5 parallel rear remittance pressure pipes 9 that are fixed with separated by a distance, to extend straight tube 17 are rear pressure-measuring pipes 10 on 1 interior edge from rear remittance pressure pipe 9 to body; Rear pressure-measuring pipe 10 has perforate 12, and the axis 13 of perforate 12 is vertical with flow direction 14. Perforate 12 apertures are between Φ 3mm～Φ 8mm, and the number of openings is between 5 of 3-. Rear pressure-tapping nozzle 11 is also arranged on the rear remittance pressure pipe 9, and rear pressure-tapping nozzle 11 is connected with measurement mechanism 3 low-pressure ends among Fig. 1; Front pressure-measuring head 8 and rear pressure-measuring head 10 mutual dislocation in the body 1. Measurement mechanism among the present invention adopts differential pressure transmitter, such as 1151. The pressure-tapping nozzle that is connected with front and back remittance pressure pipe has same structure that one blow valve port 15 is arranged, and it communicates with the hair-dryer interface by airduct can remove the interior foreign material of pipe, makes things convenient for the maintenance of sensing device 2.
The present invention adopts in a plurality of perforates of front pressure pipe design as pressure port, measures respectively the stagnation pressure of difference on the same cross section, at rear pressure pipe perforate is arranged, and measures the static pressure on the same cross section of fluid. When different flow velocitys passes through flowmeter bodies, produce corresponding differential pressure value between stagnation pressure and the static pressure, use the experimental data of the continuous bernoulli equation basic principle of fluid and wind tunnel laboratory, calculate by the flow of pipeline and the corresponding relation between the differential pressure, correction finally draws corresponding Mathematical Modeling through temperature and pressure. Because there are corresponding pressure ring casing and multiple spot pressure method in the outside, make institute's force value of getting more stable, accurate. Reliability and the precision of metering have greatly been improved than traditional flow instrument. The length of sensing device body of the present invention is the 0.5D of caliber.
The present invention is provided with guiding cone in process pipe 1, place, guiding cone maximum cross section forms throat. When air-flow through herein, speed is maximum, static pressure is minimum, stagnation pressure on fluid measured cross section, cone front support place, Δ P is the poor of the interior average static pressure of average stagnation pressure and throat of pipeline, and its value changes with throat's size, in design can be according to the concrete size of determining throat of flow velocity size. Its main feature is to be used for measuring various messy gas flows. In addition, the flow resistance of this throttling arrangement is little, so the flow losses that produce are little, and conserve energy. And can be according to actual conditions, change diameter is than (D2/D
1) improve differential pressure value (Δ P=P0-P
2), to guarantee the precision of flow measurement. Because this throttling arrangement is to adopt fairshaped rotary body (bullet) in pipeline central authorities, so not only its resistance is little, and also little to the mobile interference through throttling arrangement, so it is more stable to flow, so the pulsation during measuring pressure is also smaller, conical section can be coated with and not put coating simultaneously, has closely improved certainty of measurement and anti-blocking performance. High in the pipeline, low side is provided with pressure tappings more than 4, can directly purge at pipeline external as occurring stopping up.
This flowmeter, is determined and the check flow formula, so just guaranteed reliability and the credibility of this throttling arrangement through wind tunnel experiment take hydromechanical theory as the basis.
Claims (7)
1, built-in conical throttling gear, it comprises the sensing device for measuring flow, with the measurement mechanism that is electrically connected with sensing device, it is characterized in that: sensing device (2) comprises body (1), guiding cone in the body (1), wherein guiding cone is divided into precentrum, straight tube, posterior pyramids and empennage and is integrally formed; Guiding cone is connected with body by empennage; Described body (1) skin has front remittance pressure pipe (5), converge pressure pipe (5) to the interior front pressure-measuring pipe (6) along extending precentrum of sensing device body (1) with the past, front pressure-tapping nozzle (7) is arranged on the front remittance pressure pipe (5), and front pressure-tapping nozzle (7) is connected with the high-pressure side of measurement mechanism (3); At front pressure-measuring pipe (6) the front pressure-measuring head (8) parallel with fluid arranged; There is perforate (12) front pressure-measuring head (8) end; Comprise the rear remittance pressure pipe (9) around an outer week of body (1), and in from rear remittance pressure pipe (9) to body (1) along extending the rear pressure-measuring pipe (10) of straight tube; Have on the rear pressure-measuring pipe (10) and become vertical perforate (12) with flow direction; Rear pressure-tapping nozzle (11) is arranged on the rear remittance pressure pipe (9), and rear pressure-tapping nozzle (11) is connected with measurement mechanism (3) low-pressure end; Front pressure-measuring head (8) and rear pressure-measuring pipe (10) mutual dislocation in the body (1).
2, built-in conical throttling gear according to claim 1 is characterized in that: described edge reaches the interior front pressure-measuring pipe (6) of sensing device body (1) between the 2-8 root, evenly distributes at angle each other.
3, built-in conical throttling gear according to claim 1 is characterized in that: described front pressure-measuring pipe has front pressure-measuring head (8), and front pressure-measuring head (8) is arranged parallel to each other between 2-6.
4, built-in conical throttling gear according to claim 1 is characterized in that: perforate (12) axis of described rear pressure-measuring pipe (10) is vertical with flow direction.
5, built-in conical throttling gear according to claim 1 is characterized in that: perforate (12) aperture on described rear pressure-measuring pipe (10) caliber is between Φ 3mm～Φ 8mm, and the number of openings is between 3-5.
6, built-in conical throttling gear according to claim 1 is characterized in that: pressure-measuring head perforate (12) 10mm before the corner after the described bent-tube boiler.
7, built-in conical throttling gear according to claim 1 is characterized in that: there is flange (4) joint on described body (1) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100426940A CN100359292C (en) | 2006-04-18 | 2006-04-18 | Built-in conical throttling gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100426940A CN100359292C (en) | 2006-04-18 | 2006-04-18 | Built-in conical throttling gear |
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| Publication Number | Publication Date |
|---|---|
| CN1834591A true CN1834591A (en) | 2006-09-20 |
| CN100359292C CN100359292C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100426940A Expired - Fee Related CN100359292C (en) | 2006-04-18 | 2006-04-18 | Built-in conical throttling gear |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949748A (en) * | 2010-08-27 | 2011-01-19 | 哈尔滨华惠电气有限公司 | Stream guider and heat meter calibrating installation using same |
| CN103105207A (en) * | 2012-12-31 | 2013-05-15 | 中国人民解放军国防科学技术大学 | Inner cone flow meter |
| CN105181038A (en) * | 2015-04-24 | 2015-12-23 | 武金玉 | Throttling device and throttling flowmeter |
| CN105466502A (en) * | 2014-12-22 | 2016-04-06 | 王子平 | Suspension dike flowmeter |
| CN106546374A (en) * | 2016-11-24 | 2017-03-29 | 中国核动力研究设计院 | Static pressure measurement device and flow velocity measuring method in a kind of complex flowfield |
| CN106768108A (en) * | 2017-02-01 | 2017-05-31 | 贺成 | A kind of plug-in type ultrasonic flowmeter |
| CN108896438A (en) * | 2018-07-25 | 2018-11-27 | 重庆大学 | Bottom hole gas bearing capacity measuring device and measurement method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236286C (en) * | 2002-11-06 | 2006-01-11 | 株式会社岛津制作所 | Differential pressure flowmeter |
| CN2689181Y (en) * | 2003-08-25 | 2005-03-30 | 刘建华 | Internal gyroscopic flow measuring shutoff apparatus |
| CN2669142Y (en) * | 2004-06-18 | 2005-01-05 | 西安中望流量仪表有限公司 | Built-in cone flowmeter |
| CN2735311Y (en) * | 2004-09-01 | 2005-10-19 | 毛新业 | Shuttle type flowmeter |
-
2006
- 2006-04-18 CN CNB2006100426940A patent/CN100359292C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949748A (en) * | 2010-08-27 | 2011-01-19 | 哈尔滨华惠电气有限公司 | Stream guider and heat meter calibrating installation using same |
| CN101949748B (en) * | 2010-08-27 | 2013-02-06 | 哈尔滨华惠电气有限公司 | Stream guider and heat meter calibrating installation using same |
| CN103105207A (en) * | 2012-12-31 | 2013-05-15 | 中国人民解放军国防科学技术大学 | Inner cone flow meter |
| CN105466502A (en) * | 2014-12-22 | 2016-04-06 | 王子平 | Suspension dike flowmeter |
| CN105181038A (en) * | 2015-04-24 | 2015-12-23 | 武金玉 | Throttling device and throttling flowmeter |
| CN106546374A (en) * | 2016-11-24 | 2017-03-29 | 中国核动力研究设计院 | Static pressure measurement device and flow velocity measuring method in a kind of complex flowfield |
| CN106546374B (en) * | 2016-11-24 | 2019-01-22 | 中国核动力研究设计院 | Static pressure measurement device and flow velocity measuring method in a kind of complex flowfield |
| CN106768108A (en) * | 2017-02-01 | 2017-05-31 | 贺成 | A kind of plug-in type ultrasonic flowmeter |
| CN108896438A (en) * | 2018-07-25 | 2018-11-27 | 重庆大学 | Bottom hole gas bearing capacity measuring device and measurement method |
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| Publication number | Publication date |
|---|---|
| CN100359292C (en) | 2008-01-02 |
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Granted publication date: 20080102 Termination date: 20170418 |