CN2884151Y - Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor - Google Patents
Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor Download PDFInfo
- Publication number
- CN2884151Y CN2884151Y CN 200620110116 CN200620110116U CN2884151Y CN 2884151 Y CN2884151 Y CN 2884151Y CN 200620110116 CN200620110116 CN 200620110116 CN 200620110116 U CN200620110116 U CN 200620110116U CN 2884151 Y CN2884151 Y CN 2884151Y
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- speed tube
- static pressure
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- total head
- even speed
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Abstract
The utility model relates to multi-test rod twice pressure equalizing type averaging pitot tube flow sensor, which is characterized in that: the utility model comprises at least two averaging pitot tube test rods 1; the pitot pressure balance cavity and the static pressure balance cavity of all the averaging pitot tube test rods are communicated through a pipeline and a cavity respectively, then connected with the positive pressure side and the negative pressure side of difference pressure transmitter 6 through an input connecting pipe. The utility model can greatly increase measurement precision; precision of the system can reach Class 1.0 to 2.0, maximum Class 0.5. The utility model is applicable to flow measurement of the pipeline in various geometric shapes, has significant economic value, more particularly in situations where the length of a straight tube part is extremely short, while the pipe caliber is large.
Description
Technical field
The utility model relates to the even speed tube flow sensor, specifically be can be on fluid-transporting tubing flow measurement points xsect, insert many (more than two or two) even speed tube test rods according to equal-area method or Chebyshev's method, accurately obtain a kind of even speed tube flow sensor of total head and static pressure mean value.
Technical background
In the existing even speed tube Flow Measuring System, sensor is the even speed tube test rod that longshore current body conveyance conduit flow measurement points cross-section center line inserts, and total head detects the hole and static pressure detection hole concentrates on the center line of measurement point xsect.For accurate measurement, also need before and after flow measurement points, install tens times even several straight length that decuples pipe diameter additional, so that the fluid of the flow measurement points xsect of flowing through forms abundant development pipe stream.
Because of the upstream line of measurement point xsect exists bend pipe, valve, caliber to shrink or various choked flow pieces such as expansion, most of fluid-transporting tubings can not provide necessary flow development length again.Therefore, the fluid of the flow measurement points of flowing through xsect is not that fully the development pipe flows usually, and it has a strong impact on the degree of accuracy and the range of application of even speed tube flow measurement.Therefore, there is following deficiency in existing even speed tube flow measurement technology:
1, a test rod is asked for total head and static pressure mean value, and requiring has long straight length.But most fluid-transporting tubings of measure field are the heavy caliber fluid-transporting tubing especially, can not satisfy this requirement at all.
2, because the fluid of flow measurement points xsect of flowing through is not abundant development pipe stream, poor with total head and static pressure mean value representativeness that a test rod obtains, cause ± 3%～± 20% measurement additive error, in addition more.
Summary of the invention
At the prior art above shortcomings, technical problem to be solved in the utility model is: the equal die mould even speed tube of a kind of many test rods secondary flow sensor is provided, it is with some even speed tube test rods, be set in parallel on the fluid-transporting tubing flow measurement points xsect, some total heads of each test rod detect the hole and static pressure detection hole covers the zone that whole measurement point xsect need detect, and the secondary that total head that each test rod obtains and static pressure mean value are imported total head and static pressure respectively all presses the chamber all to press.Such total head and static pressure mean value even the fluid of the flow measurement points xsect of flowing through is not that fully the development pipe flows, also can accurately measure the true value of flow.
The technical solution of the utility model is such, the equal die mould even speed tube of described many test rods secondary flow sensor comprises at least two even speed tube test rods, the total head chamber of all even speed tube test rods and static pressure chamber are communicated with by pipeline or cavity respectively, are connected with the input connecting pipe of differential pressure transmitter respectively again.
The utility model has following characteristic because its described structure has changed an original even speed tube test rod and measured " fluid of the flow measurement points of need flowing through xsect forms abundant development pipe stream " this condition:
1, the equal die mould even speed tube of many test rods secondary flow sensor no longer relies on flow development length to the measurement of flow.Even in 1～2 times of D straight length scope, also can accurately measure.It has enlarged the application scenario greatly.
2, the degree of accuracy of Ce Lianging improves greatly, and system accuracy can reach 1.0～2.0 grades, reaches as high as 0.5 grade.
3, be applicable to various geometric configuration pipeline flows measurements.Particularly in the large diameter pipeline flow measurement, there is great economy to be worth.
Description of drawings
Said structure of the present utility model can further specify by the embodiment that accompanying drawing provides.
The utility model has following accompanying drawing:
Accompanying drawing 1 is the structural representation of the utility model embodiment 1;
Accompanying drawing 2 is the structural representation of the utility model embodiment 2.
Referring to accompanying drawing: 1-even speed tube test rod, 2-detect the hole among the figure, 3-total head secondary all presses chamber, 4-static pressure secondary to press chamber, 5-card extender, 6-differential pressure transmitter, 7-connecting pipe, the detected fluid-transporting tubing tube wall of 8-.
Embodiment
Referring to accompanying drawing, in two embodiment that accompanying drawing provides, the equal die mould even speed tube of many test rods secondary flow sensor comprises 3 even speed tube test rods 1, the total head of all even speed tube test rods all presses chamber and static pressure all to press the chamber to be connected the total head passage and the static pressure passage of card extender 5 separately respectively, total head passage on each card extender and static pressure passage all press chamber 3 and static pressure all to press chamber 4 to be communicated with the total head secondary respectively by pipeline, and the total head secondary all presses chamber 3 and static pressure secondary all to press chamber 4 to be connected differential pressure transmitter 6 by connecting pipe respectively.This device can not comprise differential pressure transmitter 6.
Above-mentioned each even speed tube test rod 1 is installed in parallel on the interior same cross section of pipeline, and the cross section of described pipeline can be circle, rectangle or other geometric configuration.The quantity of the even speed tube test rod of installing 1 is decided with the size in the cross section of detected fluid-transporting tubing.Described each even speed tube test rod 1 is installed in parallel on the same cross section of a segment pipe identical with the tested pipeline cross section, and the two ends of this segment pipe can be connected with tested pipeline by flange.What described even speed tube test rod and total head thereof detected that hole and static pressure detect the hole is provided with quantity and position, determines according to geometric configuration, measurement point cross-sectional area and the velocity flow profile of detected fluid-transporting tubing; On fluid-transporting tubing flow measurement points xsect.Each test rod records total head and static pressure mean value separately, sends into the secondary of total head and static pressure more respectively and all presses the chamber all to press, and imports differential pressure transmitter through total head and static pressure mean value that secondary is all pressed.
Claims (2)
1, the equal die mould even speed tube of a kind of many test rods secondary flow sensor, it is characterized in that: comprise at least two even speed tube test rods (1), the total head chamber of all even speed tube test rods and static pressure chamber are communicated with by pipeline or cavity respectively, are connected by the positive and negative pressure side of connecting pipe with differential pressure transmitter (6) respectively again.
2, the equal die mould even speed tube of many test rods secondary according to claim 1 flow sensor, it is characterized in that: the total head of all even speed tube test rods all presses chamber and static pressure all to press the chamber to be connected the total head passage and the static pressure passage of card extender (5) separately respectively, total head passage on each card extender and static pressure passage all press chamber (3) and static pressure secondary all to press chamber (4) to be communicated with the total head secondary respectively by pipeline, and the total head secondary all presses chamber (3) and static pressure secondary all to press chamber (4) to be connected by the positive and negative pressure side of connecting pipe with differential pressure transmitter (6) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620110116 CN2884151Y (en) | 2006-03-15 | 2006-03-15 | Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620110116 CN2884151Y (en) | 2006-03-15 | 2006-03-15 | Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884151Y true CN2884151Y (en) | 2007-03-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620110116 Expired - Fee Related CN2884151Y (en) | 2006-03-15 | 2006-03-15 | Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2884151Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507078A (en) * | 2011-11-14 | 2012-06-20 | 北京宇航系统工程研究所 | Precision measuring system and method for conveying pipe flow resistance |
| 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 |
| CN110617857A (en) * | 2019-11-14 | 2019-12-27 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
| CN110686735A (en) * | 2019-11-14 | 2020-01-14 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
-
2006
- 2006-03-15 CN CN 200620110116 patent/CN2884151Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507078A (en) * | 2011-11-14 | 2012-06-20 | 北京宇航系统工程研究所 | Precision measuring system and method for conveying pipe flow resistance |
| 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 |
| CN110617857A (en) * | 2019-11-14 | 2019-12-27 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
| CN110686735A (en) * | 2019-11-14 | 2020-01-14 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration and self-correction Pitotbar intelligent flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: CHONGQING TUOZHAN AUTOMATION INSTRUMENT CO., LTD. Assignor: Xiang Jiacong Contract record no.: 2011500000058 Denomination of utility model: Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor Granted publication date: 20070328 License type: Exclusive License Record date: 20110914 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 Termination date: 20110315 |