CN201819708U - Uniform-speed tube flow sensor with flow distributing wings - Google Patents
Uniform-speed tube flow sensor with flow distributing wings Download PDFInfo
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- CN201819708U CN201819708U CN201020217017XU CN201020217017U CN201819708U CN 201819708 U CN201819708 U CN 201819708U CN 201020217017X U CN201020217017X U CN 201020217017XU CN 201020217017 U CN201020217017 U CN 201020217017U CN 201819708 U CN201819708 U CN 201819708U
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- flow sensor
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Abstract
The utility model relates to a uniform-speed tube flow sensor with flow distributing wings, which comprises a detecting rod (1), a mounting seat (2), a positioning sleeve (3), a positioning pin (4), a lock nut (5), a pressure-leading joint (6) and a gasket (7). The uniform-speed tube flow sensor is characterized in that sharp-corner-shaped flow distributing wings (8) are arranged on two sides of the cross section of the detecting rod (1). When flowing through the uniform-speed tube flow sensor, fluid is divided towards two sides along a counter-flow surface (9) of each flow distributing wing and separated at the positions of sharp corners of the flow distributing wing (8). Separation points of the fluid on the side surface of a uniform-speed tube is fixed relatively, and is not changed along with flow speed, thereby increasing linearity of meter factor curve of the uniform-speed tube flow sensor, reducing measurement errors and increasing measurement precision. Flow surfaces (10) of the flow distributing wings stops reflowed fluid at the rear of the uniform-speed tube detecting rod, and the fluid forms more stable vortex at the rear of the detecting rod, thereby increasing stability of pressure of a static pressure extracting hole (11) of the uniform-speed flow sensor, improving stability of differential pressure signal output of the sensor, and enhancing repeatability of measured results of the sensor. Under the condition that the a measuring straight tube section is not long enough and flow fields are disordered, the flow distributing wings with flow distributing effect improves performances of the uniform-speed tube flow sensor more obviously. Due to the flow distributing effect of the flow distributing wings, outputted differential pressure signal values of the sensor are large, differential pressure detection is convenient, and flow measurement precision is increased.
Description
Technical field
The utility model relates to flow sensor, is specifically related to a kind of rectifying wings even speed tube flow sensor.
Background technology
The even speed tube flow sensor is based on pitot tube measuring principle and approximate integration theory, describe pipeline with more point and fully develop turbulent flow velocity flow profile equation, measure on the cross section flow axis to mean flow rate by the flow velocity of some on the straight line of measuring channel cross section, thereby calculate volumetric flow rate.The even speed tube flow sensor has that the pressure loss is little, easy accessibility, simple in structure, distinct advantages such as cost is low.The straight tube that to insert ducted even speed tube test rod be a hollow, straight tube inside separate and are stagnation pressure chamber and static pressure chamber; On the fluoran stream surface of bar, arrange total pressure tapping, communicate, on the lee side of bar, arrange static pressure tapping, communicate with the static pressure chamber with the stagnation pressure chamber; Pressure differential according to stagnation pressure chamber and static pressure chamber can be calculated ducted flow.
Existing even speed tube test rod xsect is shapes such as Delta crust shape, bullet-shaped, rhombus, its performance is subjected to cross-section of pipeline fluid velocity distribution influence bigger, and needing has long straight length before and after the even speed tube, or rectifier is installed, to guarantee measuring accuracy, this has reduced the suitable ability of even speed tube.The existing even speed tube of different cross section shape, under the situation that guarantees bigger output differential pressure, the less stable of signal, measurement result repeatability is bad; Under the situation that guarantees signal stabilization, the output differential pressure is less, the measuring accuracy under the low flow condition of influence.
Existing even speed tube is installed on the pipeline by flange, be threaded etc., and the installation site precision is relatively poor, and the small-bore flow measurement precision of centering causes certain influence.
Summary of the invention
The purpose of this utility model provides a kind of rectifying wings even speed tube flow sensor, comprise test rod, mount pad, locating sleeve, register pin, locknut, impulse joint, pad, it is characterized in that: test rod xsect both sides have the rectifying wings of outstanding angular shape; The cooperation of locating sleeve, mount pad and register pin has guaranteed the circumferential locations precision when test rod is installed; Locating sleeve and mount pad cooperate, guaranteed when test rod is installed about, the front and back position precision.
When fluid flows through the even speed tube sensor, separate to both sides along the rectifying wings fluoran stream surface, separate at the sharp corner of rectifying wings.Fluid is more fixing at the burble point of even speed tube side, and the variation with flow velocity does not change.Compare with existing other cross sectional shape, the rectifying wings lee side refluxes to the fluid at even speed tube test rod rear and has barrier effect, fluid the test rod rear formed bigger, the more stable whirlpool of yardstick.The linearity that these have improved even speed tube flow sensor instrument coefficient curve has reduced measuring error, has improved measuring accuracy.Improve the stability of static pressure tapping pressure on the even speed tube test rod lee side, strengthened the stability of sensor output differential pressure signal, improved flow measurement result's repeatability.
Measuring the flow development length deficiency, velocity distribution is bigger with desirable fully development turbulent velocity distributional difference on the cross-section of pipeline, or under the unsettled situation of velocity flow profile, the rectified action of rectifying wings is to improving the performance of even speed tube flow sensor, act on more obvious, under the short condition of straight length, can guarantee measuring accuracy.This has just enlarged the scope of application of sensor.
Because the rectified action of rectifying wings, sensor output differential pressure signal numerical value is big, is convenient to differential pressure and detects, and has improved the flow measurement precision.Rectifying wings even speed tube flow sensor not only has measuring repeatability preferably like this, also has bigger output differential pressure value, therefore has better comprehensive performance.
What the test rod of rectifying wings even speed tube and locating sleeve were firm is bound up, and the cylindrical outer surface of locating sleeve the latter half cooperates with mount pad inner cylinder hole surface.In the time of can limiting the installation of even speed tube sensor bar like this, because the position deviation that the swing on the direction of all around causes improves the positional precision of installing.
On the step and mount pad upper surface that give prominence at the locating sleeve middle part, pilot hole is arranged, locate by register pin, in the time of can limiting the installation of even speed tube sensor bar, because the position deviation that the rotation on the circumferencial direction causes improves the positional precision of installing, and guarantees that total pressure tapping is over against incoming flow.
The raising of installation site precision can improve the even speed tube flow sensor and use on-the-spot flow measurement performance; Can improve the repeatedly flow measurement repdocutbility after the demolition, installation of sensor.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the A-A cut-open view of Fig. 1.
Fig. 3 is the cross-sectional views of the utility model embodiment 2 test rods in the pressure port position.
Fig. 4 is the cross-sectional views of the utility model embodiment 3 test rods in the pressure port position.
Fig. 5 is the cross-sectional views of the utility model embodiment 4 test rods in the pressure port position.
Fig. 6 is the cross-sectional views of the utility model embodiment 5 test rods in the pressure port position.
Embodiment
The utility model embodiment 1 as shown in Figure 1 and Figure 2, test rod (1) xsect both sides have the rectifying wings (2) of outstanding angular shape, the cooperation of locating sleeve (3), mount pad (2) and register pin (4), guaranteed the circumferential locations when test rod (1) is installed, locating sleeve (3) and mount pad (2) cooperate, guaranteed when test rod (1) is installed about, front and back position.
Fig. 3 is the cross-sectional views of the utility model embodiment 2 test rods in the pressure port position.
Fig. 4 is the cross-sectional views of the utility model embodiment 3 test rods in the pressure port position.
Fig. 5 is the cross-sectional views of the utility model embodiment 4 test rods in the pressure port position.
Fig. 6 is the cross-sectional views of the utility model embodiment 5 test rods in the pressure port position.
Fig. 7 is the cross-sectional views of the utility model embodiment 6 test rods in the pressure port position.
Claims (4)
1. rectifying wings even speed tube flow sensor comprises test rod (1), mount pad (2), locating sleeve (3), register pin (4), locknut (5), impulse joint (6), pad (7), it is characterized in that: even speed tube test rod (1) xsect middle part has rectifying wings; The cooperation of locating sleeve (3), mount pad (2) and register pin (4) has guaranteed test rod (1) installation site precision.
2. rectifying wings even speed tube flow sensor according to claim 1 is characterized in that: even speed tube test rod (1) xsect both sides have the rectifying wings (8) of angular shape.
3. rectifying wings even speed tube flow sensor according to claim 1 is characterized in that: the cooperation of locating sleeve (3), mount pad (2) and register pin (4) has guaranteed the circumferential locations precision when test rod (1) is installed.
4. rectifying wings even speed tube flow sensor according to claim 1 is characterized in that: locating sleeve (3) and mount pad (2) cooperate, guaranteed when test rod (1) is installed about, the front and back position precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020217017XU CN201819708U (en) | 2010-06-07 | 2010-06-07 | Uniform-speed tube flow sensor with flow distributing wings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020217017XU CN201819708U (en) | 2010-06-07 | 2010-06-07 | Uniform-speed tube flow sensor with flow distributing wings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201819708U true CN201819708U (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020217017XU Expired - Fee Related CN201819708U (en) | 2010-06-07 | 2010-06-07 | Uniform-speed tube flow sensor with flow distributing wings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201819708U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384771A (en) * | 2011-11-24 | 2012-03-21 | 王忠辉 | Pressure sampling head of Pitotbar flow sensor |
| CN102901538A (en) * | 2011-07-25 | 2013-01-30 | 明笛 | Double-wing type flow sensor |
| CN103010482A (en) * | 2012-11-28 | 2013-04-03 | 中国商用飞机有限责任公司 | Pressure guiding module mounted in flute-shaped pipe |
| CN105716670A (en) * | 2016-04-21 | 2016-06-29 | 承德菲时博特自动化设备有限公司 | Multichannel rectangular needle tube flow measurement device |
| CN106940211A (en) * | 2017-03-06 | 2017-07-11 | 江阴市节流装置厂有限公司 | A kind of wing mean velocity tube flowmeter |
| CN108871470A (en) * | 2018-06-14 | 2018-11-23 | 东莞理工学院 | A kind of new plug-in differential pressure flowmeter |
| CN109443458A (en) * | 2018-11-08 | 2019-03-08 | 天津市天大泰和自控仪表技术有限公司 | A kind of concave arc shape double fluid is to mean velocity tube flowmeter |
| CN109443459A (en) * | 2018-12-05 | 2019-03-08 | 福建上润精密仪器有限公司 | The throttling set of built-in high-precision sensor |
| CN112964323A (en) * | 2021-02-10 | 2021-06-15 | 河北大学 | Saturated wet steam mass flow and dryness measuring device and measuring method |
| DE202020102087U1 (en) | 2020-04-15 | 2021-07-16 | Postberg + Co. GmbH | Measuring probe |
-
2010
- 2010-06-07 CN CN201020217017XU patent/CN201819708U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901538A (en) * | 2011-07-25 | 2013-01-30 | 明笛 | Double-wing type flow sensor |
| CN102901538B (en) * | 2011-07-25 | 2015-03-25 | 明笛 | Double-wing type flow sensor |
| CN102384771A (en) * | 2011-11-24 | 2012-03-21 | 王忠辉 | Pressure sampling head of Pitotbar flow sensor |
| CN103010482A (en) * | 2012-11-28 | 2013-04-03 | 中国商用飞机有限责任公司 | Pressure guiding module mounted in flute-shaped pipe |
| CN103010482B (en) * | 2012-11-28 | 2015-05-13 | 中国商用飞机有限责任公司 | Pressure guiding module mounted in flute-shaped pipe |
| CN105716670A (en) * | 2016-04-21 | 2016-06-29 | 承德菲时博特自动化设备有限公司 | Multichannel rectangular needle tube flow measurement device |
| CN106940211A (en) * | 2017-03-06 | 2017-07-11 | 江阴市节流装置厂有限公司 | A kind of wing mean velocity tube flowmeter |
| CN108871470A (en) * | 2018-06-14 | 2018-11-23 | 东莞理工学院 | A kind of new plug-in differential pressure flowmeter |
| CN109443458A (en) * | 2018-11-08 | 2019-03-08 | 天津市天大泰和自控仪表技术有限公司 | A kind of concave arc shape double fluid is to mean velocity tube flowmeter |
| CN109443459A (en) * | 2018-12-05 | 2019-03-08 | 福建上润精密仪器有限公司 | The throttling set of built-in high-precision sensor |
| CN109443459B (en) * | 2018-12-05 | 2024-01-16 | 福建上润精密仪器有限公司 | Throttle device with built-in high-precision sensor |
| DE202020102087U1 (en) | 2020-04-15 | 2021-07-16 | Postberg + Co. GmbH | Measuring probe |
| CN112964323A (en) * | 2021-02-10 | 2021-06-15 | 河北大学 | Saturated wet steam mass flow and dryness measuring device and measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20180607 |