CN207850445U - One kind measuring rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity - Google Patents
One kind measuring rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity Download PDFInfo
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- CN207850445U CN207850445U CN201721885383.0U CN201721885383U CN207850445U CN 207850445 U CN207850445 U CN 207850445U CN 201721885383 U CN201721885383 U CN 201721885383U CN 207850445 U CN207850445 U CN 207850445U
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Abstract
The utility model discloses a kind of for subregion velocity field flow velocity measurement rectangular surfaces pressure tapping flowmeter, including at least two groups double square venturi, it is connected between adjacent double square venturi by supporting, every group of double square venturi includes level-one rectangle venturi and the two level rectangle venturi in level-one rectangle venturi, and level-one rectangle venturi, two level rectangle venturi are connected by connecting pipe with pressure interface respectively.The utility model takes rectangular surfaces ways of measure pressure, has and is carried out from the function of deashing using fluid dynamic energy, thoroughly solves and measures dust-contained airflow and hold susceptible to plugging problem, while also reservation measurement accuracy and the advantages of almost without restriction loss.
Description
Technical field
The utility model is related to be used to subregion velocity field flow velocity measure rectangular surfaces pressure tapping flowmeter, belong to gas flowmeter skill
Art field.
Background technology
In electric power, chemical industry, steel, the industries such as cement are required for meter gaseous flow velocity to carry out flow field analysis, traditional flow
Meter is suitable for horizontal pipe more, the phenomenon that in vertical pipeline using will appear frequent jams, needs frequent blowback to sweep, maintenance
Greatly, measurement data is unstable.
Invention content
Goal of the invention：The utility model aim is in view of the deficiencies of the prior art, to provide a kind of for subregion velocity field
Flow velocity measures rectangular surfaces pressure tapping flowmeter, thoroughly solves and measures the susceptible to plugging problem of dust-contained airflow appearance, while also retaining and measuring
Precision and the advantages of almost without restriction loss.
Technical solution：It is described in the utility model to measure rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity, including extremely
Lack two groups of double square venturi, connected between adjacent double square venturi by supporting, every group of double square venturi includes one
Grade rectangle venturi and the two level rectangle venturi in level-one rectangle venturi, level-one rectangle venturi, second moments
Shape venturi is connected by connecting pipe with pressure interface respectively.Using double square venturi composite structure, since self structure is cut
Face shrink, by wind speed have a more substantial increase compared with actual wind speed, differential pressure amplification factor is big, and the differential pressure of generation is in this barrel
The 2 of air-flow dynamic pressure~3 times, high certainty of measurement.Double square venturi composite structure is designed using penetration, and dust-contained airflow can be smooth
Pass through, without any dust stratification point between the combination of double square venturi, operation stability is high.
Above-mentioned technical proposal is further improved, is all provided in the level-one rectangle venturi, two level rectangle venturi pressure point
Have from deashing device.It is hung with automatic ash removing device in each rectangle venturi pressure point, the automatic ash removing device is in pipe
Make random swing under the impact of air-flow, using fluid dynamic energy from the anticlogging function of deashing, play the role of from deashing, certainly
The dead weight of dynamic deashing device and size are determined by the experiment before manufacture, are suitable for dust-contained airflow and are measured, effectively prevent
It blocks.
Further, the positive pressure side of the level-one rectangle venturi of two adjacent groups double square venturi, two level rectangle venturi
It is interconnected, the level-one rectangle venturi of two adjacent groups double square venturi, the suction side of two level rectangle venturi are interconnected.
Rectangle venturi can be according to the of different sizes of actual condition and line size, and by connecting pipe, homalographic is organically assembled in one
It rises, positive pressure side is connected with positive pressure side, and suction side is connected with suction side, is combined into multiple spot matrix form rectangular surfaces pressure tapping flowmeter, surveys
Amount range can cover whole cross section.
Further, the level-one rectangle venturi, two level rectangle venturi single pressure point minimum dimension be 100mm
×50mm.The design of double square venturi uses face pressure, and the region of single pressure point covering is wide, and single pressure spot size minimum is set
It is calculated as：100 × 50mm can design different size pressure point according to live actual condition, measure representative higher.
Further, the pipeline gas flow rate monitoring system formed using above-mentioned rectangular surfaces pressure tapping flowmeter, according to pipeline
Size is different, pipeline vertical section is divided into multiple subregions, each subregion arranges two groups of double square text mounds, independent to measure each subregion
Flow velocity, reflect each region Flow Field Distribution situation in real time.
Advantageous effect：The utility model is put in conjunction with traditional airfoil type measuring device and venturi measuring device with differential pressure
The advantages of big multiple is big, high certainty of measurement, changes and is easy to block and lead to not when previous flowmeter measures dust-contained airflow
Measurement problem.Rectangular surfaces pressure tapping flowmeter is to fully absorb traditional airfoil type measuring device and venturi measuring device is excellent
The measuring device of new generation developed on the basis of point, the device use novel structure design, take face ways of measure pressure, have
The function from deashing is carried out using fluid dynamic energy, thoroughly solves and measures the susceptible to plugging problem of dust-contained airflow appearance, while also retaining
Measurement accuracy and the advantages of almost without restriction loss, is easily installed on the pipeline of capwise, is suitable in vertical segment pipe
The size for measuring air differential pressure value is related to gas flow rate and Flow Field Distribution on-line analysis monitoring systems technology field, can be used for electricity
Power, chemical industry, steel, the industries such as cement.
Description of the drawings
Fig. 1 is the front view of the utility model；
Fig. 2 be along Fig. 1 A-A to structural schematic diagram；
Fig. 3 is the structural schematic diagram of the B-B direction along Fig. 2；
Fig. 4 is the vertical view of Fig. 1；
Fig. 5 is sectional view of the utility model in vertical segment pipe；
In figure：1, double square venturi, 11, level-one rectangle venturi, 12, two level rectangle venturi, 13, fill from deashing
It sets, 4, connecting pipe, 5, support, 6, pressure interface, 7, vertical segment pipe.
Specific implementation mode
Technical solutions of the utility model are described in detail below by attached drawing, but the scope of protection of the utility model
It is not limited to the embodiment.
Embodiment 1：As shown in Figures 1 to 4 measures rectangular surfaces pressure tapping flowmeter, including two for subregion velocity field flow velocity
Double square venturi 1 is organized, is connected by support 5 between two groups of double square venturi 1, every group of double square venturi 1 includes one
Grade rectangle venturi 11 and the two level rectangle venturi 12 in level-one rectangle venturi 11, level-one rectangle venturi
11, be equipped in the pressure point of two level rectangle venturi 12 from deashing device 13, single pressure point minimum dimension be 100mm ×
50mm。
Level-one rectangle venturi 11, two level rectangle venturi 12 are connected separately with connecting pipe 4, and two level rectangle venturi 12
It is formed and is fixed by coupled connecting pipe 4 and level-one rectangle venturi 11；The level-one rectangle text of two groups of double square venturi 1
11 in mound, two level rectangle venturi 12 organically fitted together by 4 homalographic of connecting pipe, positive pressure side is connected with positive pressure side,
Suction side is connected with suction side, is combined into multiple spot matrix form rectangular surfaces pressure tapping flowmeter, and the end of connecting pipe 4 is equipped with pressure interface
6, measurement range can cover whole cross section.
As shown in figure 5, when actual installation, according to line size difference, divide for multiple subregions along pipeline vertical section 7, each
Subregion arranges that two groups of double square venturi 1, the independent flow velocity for measuring each subregion reflect each region Flow Field Distribution situation in real time.
Operation principle：When level-one rectangle venturi 11, two level rectangle text of the dust-contained airflow in pipeline by rectangular surfaces pressure tapping flowmeter
When 12 in mound, windward side is converted into pressure energy by gas shock, the here kinetic energy of air-flow, because of level-one rectangle venturi 11, two
Grade rectangle 12 passage sections of venturi are of different sizes, by flow velocity it is different, can form pressure difference between two-stage rectangle venturi,
Size is related with wind speed (amount) in pipe, and wind speed (amount) is bigger, and differential pressure is bigger；Wind speed (amount) is small, and differential pressure is also small, therefore, measures
The size of differential pressure, then the correspondence of differential pressure and wind speed (amount) is found out, it can correctly measure wind in pipe（Amount）.
As described above, although the utility model has been indicated and described with reference to specific preferred embodiment, it must not
It is construed to the limitation to the utility model itself.In the spirit and scope for not departing from the utility model that appended claims define
Under the premise of, it can various changes can be made in the form and details to it.
Claims (5)
1. one kind measuring rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity, it is characterised in that：Including the double squares of at least two groups
Shape venturi is connected by supporting between adjacent double square venturi, and every group of double square venturi includes level-one rectangle text mound
In and the two level rectangle venturi in level-one rectangle venturi, level-one rectangle venturi, two level rectangle venturi point
It is not connected with pressure interface by connecting pipe.
2. being used for subregion velocity field flow velocity according to claim 1 measures rectangular surfaces pressure tapping flowmeter, it is characterised in that：It is described
It is equipped with from deashing device in level-one rectangle venturi, two level rectangle venturi pressure point.
3. being used for subregion velocity field flow velocity according to claim 1 measures rectangular surfaces pressure tapping flowmeter, it is characterised in that：It is adjacent
The level-one rectangle venturi of two groups of double square venturi, the positive pressure side of two level rectangle venturi are interconnected, the double squares of two adjacent groups
The level-one rectangle venturi of shape venturi, the suction side of two level rectangle venturi are interconnected.
4. being used for subregion velocity field flow velocity according to claim 1 measures rectangular surfaces pressure tapping flowmeter, it is characterised in that：It is described
Level-one rectangle venturi, two level rectangle venturi single pressure point minimum dimension be 100mm × 50mm.
5. using the pipeline gas flow rate monitoring system of any rectangular surfaces pressure tapping flowmeter composition of Claims 1-4,
It is characterized in that：Subregion is carried out along pipeline vertical section, each subregion arranges two groups of double square venturi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721885383.0U CN207850445U (en) | 2017-12-28 | 2017-12-28 | One kind measuring rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721885383.0U CN207850445U (en) | 2017-12-28 | 2017-12-28 | One kind measuring rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207850445U true CN207850445U (en) | 2018-09-11 |
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ID=63419696
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721885383.0U Active CN207850445U (en) | 2017-12-28 | 2017-12-28 | One kind measuring rectangular surfaces pressure tapping flowmeter for subregion velocity field flow velocity |
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| CN (1) | CN207850445U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113687098A (en) * | 2021-07-19 | 2021-11-23 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Differential pressure type powder pipe wind speed measuring device and method for coal electric unit |
-
2017
- 2017-12-28 CN CN201721885383.0U patent/CN207850445U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113687098A (en) * | 2021-07-19 | 2021-11-23 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Differential pressure type powder pipe wind speed measuring device and method for coal electric unit |
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