CN203908603U - Annubar flowmeter - Google Patents
Annubar flowmeter Download PDFInfo
- Publication number
- CN203908603U CN203908603U CN201420346587.7U CN201420346587U CN203908603U CN 203908603 U CN203908603 U CN 203908603U CN 201420346587 U CN201420346587 U CN 201420346587U CN 203908603 U CN203908603 U CN 203908603U
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- China
- Prior art keywords
- tube
- flowmeter
- impact tube
- hand shaft
- hole
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- 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.)
- Expired - Lifetime
Links
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract description 15
- FWQHNLCNFPYBCA-UHFFFAOYSA-N fluoran Chemical compound C12=CC=CC=C2OC2=CC=CC=C2C11OC(=O)C2=CC=CC=C21 FWQHNLCNFPYBCA-UHFFFAOYSA-N 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 4
- 238000012935 Averaging Methods 0.000 abstract 4
- 238000009530 blood pressure measurement Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The utility model relates to the technical field of measurement of fluid flow, in particular to an Annubar flowmeter. The Annubar flowmeter comprises an Annubar flowmeter body which comprises a main sensor measuring body, wherein the main sensor measuring body comprises an outer-layer impact tube, and an inner-layer averaging tube and a static tube are arranged in the top end of the outer-layer impact tube is connected with an Annubar pressure taking head; the outer-layer impact tube is fixed on the pipe wall of a to-be-detected pipeline through an Annubar mounting piece; pairs of total pressure holes are arranged from the middle point to two ends on the incident flow surface of the outer-layer impact tube according to Chebyshev logarithm law, and axes of the total pressure holes are parallel to the central line of the to-be-detected pipeline; and pairs of secondary averaging holes are formed in the wall of the inner-layer averaging tube, and the axes of the secondary averaging holes are parallel to the axes of the total pressure holes. According to the Annubar flowmeter, the problem that differential pressure is difficult to measure precisely is solved, the measured precision of the differential pressure is increased due to the sensor in a novel shape, and the accuracy of the flowmeter is higher.
Description
Technical field
The utility model relates to the field of measuring technique of fluid flow, particularly a kind of holder hand shaft flowmeter for measuring channel gas flow.
Background technology
Traditional differential pressure flowmeter is substantially all to consist of ram-air pipe and static tube, has total head measured hole to measure fluid total head on ram-air pipe, has static pressure measurement hole measurement hydrostatic pressure on static tube.During use, flowmeter is inserted in tested pipeline, the placement parallel with grain direction of measured hole axis, differential pressure transmitter obtains differential pressure and is sent in integrating instrument, carrying out flow rate calculation according to recording pressure.Very ripe for the flow measurement technology of gas both at home and abroad at present, the precision of the instrument and meters such as transmitter and integrating instrument and sensitivity have all reached very high level.The problem of its existence is: be the impact of the precision of differential pressure measurement on flow.While measuring total head, because fluid is not completely static near pitot hole, therefore can produce an error, the small vibrations of gas in pipeline simultaneously also can exert an influence to the measurement of stagnation pressure; When gas flow rate is excessive or when too small, static bole place is difficult to form enough large voltage stabilizing district, it is inaccurate that the measurement of static pressure also can become, so the difficulty of flow measurement is mainly the restriction that is subject to differential pressure measurement now.Such as, the flowmeter of the brands such as Annubar, Verabar is all in sensor profile, to have done various research and innovation, is the measuring accuracy that pressure survey provides better environment to guarantee pressure, improves the measuring accuracy of flow.
Utility model content
The purpose of this utility model is for the defect of prior art and deficiency, provide a kind of simple in structure, holder hand shaft flowmeter reasonable in design, easy to use, it solves differential pressure and is difficult to the problem of accurately measuring, sensor by new shape improves the differential pressure precision recording, and flowmeter accuracy is higher.
For achieving the above object, the technical solution adopted in the utility model is:
Holder hand shaft flowmeter described in the utility model, it comprises holder hand shaft flowmeter bodies, described holder hand shaft flowmeter bodies comprises a sensor measurement main body, and described sensor measurement main body comprises an outer impact tube, in this skin impact tube, is provided with internal layer average tube and static tube; On described outer impact tube fluoran stream surface, measure portion is provided with paired pitot hole by Chebyshev's logarithm rule from mid point to two ends, and this pitot hole axis is parallel with tested pipeline center line; On the tube wall of described internal layer average tube, be provided with some paired quadratic average holes, this internal layer average tube communicates by quadratic average hole with outer impact tube; Described outer impact tube top connects a holder hand shaft pressure head; Described outer impact tube is by asking hand shaft fabricated section to be fixed on tube wall; On described outer impact tube, a baroport is set, this baroport is arranged on sensor measurement main body and goes to flow path direction center; The shape of cross section of this baroport place survey sensor is hexagon.
Further, the axis in described quadratic average hole is parallel with the axis of pitot hole, and the axis in quadratic average hole all passes through the mid point of every a pair of adjacent pitot hole line of centres.
Further, described outer impact tube is cylindrical shape.
Adopt after said structure, the utility model beneficial effect is: holder hand shaft flowmeter described in the utility model, and its solves differential pressure and is difficult to the problem of accurately measuring, and the sensor by new shape improves the differential pressure precision recording, and flowmeter accuracy is higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is baroport place sensor cross-section schematic diagram;
Fig. 3 is holder hand shaft sensor measurement partial cross section figure;
Fig. 4 is holder hand shaft fluoran stream surface front elevation.
Description of reference numerals:
1: pitot hole, 2: quadratic average hole, 3: baroport, 4: outer impact tube, 5: internal layer average tube, 6: static tube, 7: holder hand shaft fabricated section, 8: holder hand shaft pressure head, 9: tested pipeline.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, holder hand shaft flowmeter described in the utility model, it comprises holder hand shaft flowmeter bodies, described holder hand shaft flowmeter bodies comprises a sensor measurement main body, described sensor measurement main body comprises an outer impact tube 4, is provided with internal layer average tube 5 and static tube 6 in this skin impact tube 4; On described outer impact tube 4 fluoran stream surfaces, measure portion is provided with paired pitot hole 1 by Chebyshev's logarithm rule from mid point to two ends, and this pitot hole 1 axis is parallel with tested pipeline center line; On the tube wall of described internal layer average tube 5, be provided with some paired quadratic average holes 2, this internal layer average tube 5 communicates by quadratic average hole 2 with outer impact tube 4; Described outer impact tube 4 tops connect holder hand shaft pressures 8; Outer impact tube 4 is fixed on tested pipeline 9 tube walls by holder hand shaft fabricated section 7; One baroport 3 is set on described outer impact tube 4, and this baroport 3 is arranged on sensor measurement main center and goes to flow path direction place, and the shape of cross section of these baroport 3 place's survey sensors is hexagon.
The axis in described quadratic average hole 2 is parallel with the axis of pitot hole 1, and the axis in quadratic average hole 2 all passes through the mid point of every a pair of adjacent pitot hole 1 line of centres.
Described outer impact tube 4 is cylindrical shape.
In the utility model, holding in the palm hand shaft flowmeter survey is partly right cylinder, and total head pressure part is comprised of outer impact tube and internal layer average tube two parts.On outer impact tube fluoran stream surface, from mid point to two ends, by Chebyshev's logarithm rule, be provided with paired pitot hole, outer impact tube is communicated by quadratic average hole with internal layer average tube, the axis in quadratic average hole is parallel with the axis of pitot hole, and the axis in quadratic average hole all passes through the mid point of every a pair of adjacent pitot hole line of centres.Total head is carried out average for the first time in outer impact tube, through carrying out average for the second time in internal layer average tube in quadratic average hole.Static pressure goes the single baroport on flow path direction to record by being located at sensor measurement part center.Baroport present position sensor profile is through special processing, and its xsect is hexagon.
Each several part assembly explanation in the utility model:
(1), the position of pitot hole: pitot hole is paired, is generally 2-4 couple, on sensor fluoran stream surface.From sensor mid point, start to sensor measurement two ends end points, according to Chebyshev's logarithm rule, select the position of pitot hole perforate.Pitot hole axis is parallel with tested pipeline center line.
(2), sensor internal has 3 passages, wherein static tube is independently, for connecting baroport and differential pressure transmitter, internal layer average tube is connected to differential pressure transmitter, is communicated with through quadratic average hole with outer impact tube.
(3), quadratic average hole is used for connecting outer impact tube and internal layer average tube, the mid point of its axis by every a pair of adjacent pitot hole line of centres and parallel with the axis of pitot hole, quadratic average hole is also paired.
(4), baroport is in sensor measurement part midpoint, be positioned at sensor and go on flow path direction.The sensor cross-section profile of baroport present position is hexagon.
The utility model is compared with traditional flowmeter, has following effect:
First: the total head that pitot hole records is carried out average for the first time in outer impact tube, behind quadratic average hole, in internal layer average tube, carry out on average for the second time, therefore the gas in internal layer average tube can be thought static in constant flow field.Unique quadratic average structure has also reduced the impact that the mobile vibrations that produce of gas self are measured total head when having guaranteed measuring accuracy.
Second: the xsect of baroport present position sensor is hexagon, this profile can make gas streamline change in the sensor of flowing through, form unique flow field, thereby near baroport, produce Yi Ge voltage stabilizing district, and this voltage stabilizing district can keep stable in larger flow rates.
The the 3rd: hexagonal external feature improves the precision of static pressure measurement greatly, has improved range ratio simultaneously, has reduced Pressure Loss Ratio, make to hold in the palm hand shaft flowmeter when gas flow rate is lower, still to have very high degree of accuracy.
Holder hand shaft flowmeter described in the utility model, its solves differential pressure and is difficult to the problem of accurately measuring, and the sensor by new shape improves the differential pressure precision recording, and flowmeter accuracy is higher.
The above is only better embodiment of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (3)
1. hold in the palm hand shaft flowmeter, it comprises holder hand shaft flowmeter bodies, described holder hand shaft flowmeter bodies comprises a sensor measurement main body, it is characterized in that: described sensor measurement main body comprises an outer impact tube (4), in this skin impact tube (4), be provided with internal layer average tube (5) and static tube (6); On described outer impact tube (4) fluoran stream surface, measure portion is provided with paired pitot hole (1) by Chebyshev's logarithm rule from mid point to two ends, and this pitot hole (1) axis is parallel with tested pipeline (9) center line; On the tube wall of described internal layer average tube (5), be provided with some paired quadratic average holes (2), this internal layer average tube (5) communicates by quadratic average hole (2) with outer impact tube (4); Described outer impact tube (4) top connects a holder hand shaft pressure head (8); Described outer impact tube (4) is fixed on the outer wall of tested pipeline (9) by holder hand shaft fabricated section (7); One baroport (3) is set on described outer impact tube (4), and this baroport (3) is arranged on sensor measurement main body and goes flow path direction midpoint, and the shape of cross section that this baroport (3) is located sensor is hexagon.
2. holder hand shaft flowmeter according to claim 1, it is characterized in that: the axis in described quadratic average hole (2) is parallel with the axis of pitot hole (1), the axis of quadratic average hole (2) all passes through the mid point of every a pair of adjacent pitot hole (1) line of centres.
3. holder hand shaft flowmeter according to claim 1, is characterized in that: described outer impact tube (4) is cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420346587.7U CN203908603U (en) | 2014-06-27 | 2014-06-27 | Annubar flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420346587.7U CN203908603U (en) | 2014-06-27 | 2014-06-27 | Annubar flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203908603U true CN203908603U (en) | 2014-10-29 |
Family
ID=51782866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420346587.7U Expired - Lifetime CN203908603U (en) | 2014-06-27 | 2014-06-27 | Annubar flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203908603U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387894A (en) * | 2015-10-16 | 2016-03-09 | 辽宁毕托巴科技有限公司 | Bitobar flowmeter |
| CN110068371A (en) * | 2019-04-11 | 2019-07-30 | 银川融神威自动化仪表厂(有限公司) | A kind of flowmeter of geometric progression anchor ring distribution |
| CN110672165A (en) * | 2019-11-14 | 2020-01-10 | 上海权宥环保科技有限公司 | Multi-point measurement Pitotbar flow sensor |
| CN110686735A (en) * | 2019-11-14 | 2020-01-14 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration, self-correction Bitoba smart flowmeter |
| DE202020102087U1 (en) | 2020-04-15 | 2021-07-16 | Postberg + Co. GmbH | Measuring probe |
-
2014
- 2014-06-27 CN CN201420346587.7U patent/CN203908603U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387894A (en) * | 2015-10-16 | 2016-03-09 | 辽宁毕托巴科技有限公司 | Bitobar flowmeter |
| CN110068371A (en) * | 2019-04-11 | 2019-07-30 | 银川融神威自动化仪表厂(有限公司) | A kind of flowmeter of geometric progression anchor ring distribution |
| CN110672165A (en) * | 2019-11-14 | 2020-01-10 | 上海权宥环保科技有限公司 | Multi-point measurement Pitotbar flow sensor |
| CN110686735A (en) * | 2019-11-14 | 2020-01-14 | 上海权宥环保科技有限公司 | Self-diagnosis, self-calibration, self-correction Bitoba smart flowmeter |
| DE202020102087U1 (en) | 2020-04-15 | 2021-07-16 | Postberg + Co. GmbH | Measuring probe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180606 Address after: 102209 2307B 2, torch street 10, Changping District science and Technology Park, Beijing (Changping demonstration area) Patentee after: PITOBAR (BEIJING) INSTRUMENT Co.,Ltd. Address before: 102200 Changping District torch street, Changping District, Beijing, 2 2307B Patentee before: Jiang Huagen |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 102209 2307B 2, torch street 10, Changping District science and Technology Park, Beijing (Changping demonstration area) Patentee after: Beijing Pitor Technology Co.,Ltd. Address before: 102209 2307B 2, torch street 10, Changping District science and Technology Park, Beijing (Changping demonstration area) Patentee before: PITOBAR (BEIJING) INSTRUMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |