CN108444555A - A kind of novel Venturi tube-type spreader flowmeter - Google Patents
A kind of novel Venturi tube-type spreader flowmeter Download PDFInfo
- Publication number
- CN108444555A CN108444555A CN201810319168.7A CN201810319168A CN108444555A CN 108444555 A CN108444555 A CN 108444555A CN 201810319168 A CN201810319168 A CN 201810319168A CN 108444555 A CN108444555 A CN 108444555A
- Authority
- CN
- China
- Prior art keywords
- venturi tube
- section
- venturi
- pressure passage
- measuring pressure
- Prior art date
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
Abstract
The invention discloses a kind of novel Venturi tube-type spreader flowmeters, its composition includes Venturi tube ontology and venturi throat, Venturi tube ontology includes entrance rectangle duct section, decompression section, interlude, boost section and outlet rectangle duct section, entrance rectangle duct section is equipped with the first pressure tap, interlude is equipped with the first measuring pressure passage, the interlude of venturi throat and above-mentioned Venturi tube ontology is installed together using interference fit, venturi throat is equipped with the second measuring pressure passage, and overlapped vertically with the first measuring pressure passage, to form the second pressure tap.Venturi tube-type spreader flowmeter disclosed by the invention is compared with general traditional Venturi tube-type spreader flowmeter, and applicability is stronger, not only can accurately be measured different flow, and reduce manufacturing cost and use cost, economic benefit is very considerable.
Description
Technical field
The invention belongs to field of flow measurement, are related to a kind of flow measurement device, and in particular to a kind of novel venturi
Cast flowmeter.
Background technology
Differential pressure flowmeter has the developing history of last 100 years as traditional measurement means, and today, it was still application
Most online flow measurement instruments of industry.
Venturi tube (Venturi tube) is divided into concealed Venturi pipe and plug-in type Venturi tube by structure.In steel
Combustion air, cold wind, the gas measurement of ironworks hot-blast stove（Blast furnace gas, coke-stove gas, coal gas of converter）And the boiler one of steam power plant
Secondary wind, Secondary Air Large Diameter Pipeline, low flow velocity pipeline meter have received good effect in measuring.Solution applicable industry enterprise mesolow,
Large Diameter Pipeline, all kinds of gas flows of low flow velocity accurately measure.Wide, the easy for installation fluid measurement instrument of measurement range.Unique knot
Structure designs and data processing method has stringent hydrodynamics foundation, and carries out real stream in national large-scale emphasis wind tunnel laboratory
Calibration.
Fluid full of Venturi meter pipeline, when it flows through the throttling element in Venturi meter pipeline, flow velocity
Local contraction will be formed at Venturi meter throttling element, thus flow velocity increases, static pressure reduces, then in venturi flow
Pressure difference is just produced before and after meter throttling element.Fluid flow is bigger, and the pressure difference of generation is bigger, can weigh flow according to pressure difference in this way
Size.This measurement method is to flow continuity equation (mass conservation law) and Bernoulli equation (law of conservation of energy)
Based on.
Invention content
The purpose of the present invention is to provide a kind of improved differential pressure type Venturi tube flow measuring meter, it and common venturi
Pipe flow measuring meter is compared, and versatility is stronger, by only change venturi throat design size realize to different flow into
The accurate measurement of gas range and improve economic effect without replacing entire Venturi tube to reduce manufacture and maintenance cost
Benefit.
The technical scheme is that：
A kind of novel Venturi tube-type spreader flowmeter, composition includes Venturi tube ontology and venturi throat, and feature exists
The second pressure tap is positioned by rectangle with venturi throat in the interlude of the Venturi tube ontology, and is interference fitted.
Further, the Venturi tube ontology is the Venturi tube-type spreader rectangle opened up in an axial direction in cylindrical solid one end
Duct includes entrance rectangle duct section, decompression section, interlude, boost section and outlet rectangle duct section successively, in entrance rectangular opening
It is the first pressure tap to be equipped with, at it on interlude at the one third of entire entrance rectangular opening Taoist priest away from entrance face in road section
Intermediate position is equipped with the first measuring pressure passage.
Further, the venturi throat is equipped with positioning section, the second measuring pressure passage and end gradient section, positioning section
Section is depressurized with Venturi tube ontology and interlude junction card slot is located by connecting, among the second measuring pressure passage and Venturi tube ontology
The first measuring pressure passage that section is equipped with is concentric and identical as the first measuring pressure passage diameter, the first measuring pressure passage and the second measuring pressure passage
Combination forms the second pressure tap, and end gradient section coordinates with Venturi tube ontology boost section with the gradient.
The beneficial effects of the invention are as follows：
1. being compared with common Venturi tube-type spreader flowmeter, the novel maximum difference of Venturi tube-type spreader flowmeter of the present invention
It is exactly to use split-type design, can be realized to different flow air inlet model by only changing the design size of venturi throat
The accurate measurement enclosed and without replacing entire Venturi tube, greatly save manufacturing cost and use cost；
2. the present invention uses rectangular duct concealed Venturi pipe, compared to circular pipe concealed Venturi pipe, differential pressure
Greatly, precision is high, measurement range is wide, and because of its unique structure, and long-time service is not susceptible to clogging.
Description of the drawings
Attached drawing 1, the structural schematic diagram of novel Venturi tube-type spreader flowmeter of the invention.
Attached drawing 2, the cross-sectional view of Venturi tube ontology in the novel Venturi tube-type spreader flowmeter of the present invention.
Attached drawing 3, the structural schematic diagram of venturi throat in the novel Venturi tube-type spreader flowmeter of the present invention.
Attached drawing 4, the cross-sectional view of venturi throat in the novel Venturi tube-type spreader flowmeter of the present invention.
In figure：1, entrance rectangle duct section, the 2, first pressure tap, 3, decompression section, the 4, second pressure tap, 5, Venturi tube
Ontology interlude, 6, venturi throat, 7, Venturi tube ontology, 8, boost section, 9, outlet rectangle duct section, 10, first surveys
Pressure passageway, the 11, second measuring pressure passage, 12, throat's entrance positioning section, 13, throat's end gradient section.
Specific implementation mode
The concrete structure and embodiment further illustrated the present invention below in conjunction with attached drawing.
In conjunction with Fig. 1 to 4, rectangular duct of the present invention is built-in and is the structure group of split type Venturi tube flow measuring meter
At including Venturi tube ontology（7）And venturi throat（6）.The Venturi tube ontology interlude（5）With Venturi tube
Throat（6）The second pressure tap is positioned by rectangle（4）, and be interference fitted.
The Venturi tube ontology（7）It is the Venturi tube-type spreader rectangle duct opened up in an axial direction in cylindrical solid one end,
Including entrance rectangle duct section（1）, the first pressure tap（2）, decompression section（3）, Venturi tube ontology interlude（5）, boost section
（8）, outlet rectangle duct section（9）, the first measuring pressure passage（10）；In entrance rectangle duct section（1）On, it is entire away from entrance face
At the one third in entrance rectangle duct, it is equipped with the first pressure tap（2）；Interlude（5）On, position is equipped with first and surveys therebetween
Pressure passageway（10）.
The venturi throat（6）Equipped with throat's entrance positioning section（12）, the second measuring pressure passage（11）With throat end
Hipped end degree section（13）, throat's entrance positioning section（12）Section is depressurized with Venturi tube ontology（3）And interlude（5）Junction card slot is fixed
Position connection, the second measuring pressure passage（11）With Venturi tube ontology interlude（5）The first measuring pressure passage being equipped with（10）With one heart, and
With the first measuring pressure passage（10）Diameter is identical, the first measuring pressure passage（10）With the second measuring pressure passage（11）Combination forms the second pressure measurement
Hole（4）, throat's end gradient section（13）With Venturi tube ontology boost section（8）Coordinate with the gradient.
The course of work of the present invention is as follows：
The novel Venturi tube-type spreader flowmeter of the present invention can be met by changing throat's design size to various inlet flow
The requirement that range accurately measures, the flow of required measurement is from the entrance rectangle duct of Venturi tube（1）It flows into, when it flows into Wen Qiu
In flowmeter pipeline throttling element i.e. depressurize section（3）When, due to local contraction, thus flow velocity increases, and static pressure reduces, and then exists
The front and back i.e. entrance rectangle duct of the throttling element of Venturi meter（1）With decompression section（3）Between just produce pressure difference;Because first
Pressure tap（2）With the second pressure tap（4）Respectively with entrance rectangle duct（1）And venturi throat（6）Be connected, still can
With by the first pressure tap（2）With the second pressure tap（4）Place measures respective specific pressure value respectively, to obtain entrance square
Shape duct（1）With decompression section（3）Between pressure difference.Fluid flow is bigger, and the pressure difference of generation is bigger, can come in this way according to pressure difference
Weigh the size of flow.Again because of venturi throat（6）Size determine measure flow accuracy and range, so working as
When preceding differential pressure type flowmeter has been unable to meet the accurate measurement to current variable flow, we can be by selecting to replace not
With the venturi throat of size（6）It meets the requirements, and without replacing entire Venturi tube, to reduce production cost, improve
Economic benefit.
The basic principles and main features of the present invention have been shown and described above.The present invention is not limited by above-described embodiment
System, the principle of the only invention of above embodiments and description description, under the premise without departing from the spirit and scope of the present invention,
Various changes and improvements may be made to the invention, these inventions and improvement belong in scope of the claimed invention.
Claims (3)
1. a kind of novel Venturi tube-type spreader flowmeter, composition includes Venturi tube ontology and venturi throat, feature
It is：The interlude of the Venturi tube ontology positions the second pressure tap with venturi throat by rectangle, and interference is matched
It closes.
2. a kind of novel Venturi tube-type spreader flowmeter according to claim 1, it is characterised in that：Venturi tube ontology is
In the Venturi tube-type spreader rectangle duct that cylindrical solid one end opens up in an axial direction, successively include entrance rectangle duct section, decompression section, in
Between section, boost section and outlet rectangle duct section be entire entrance rectangle duct away from entrance face in the section of entrance rectangle duct
At one third, equipped with the first pressure tap, position is equipped with the first measuring pressure passage therebetween on interlude.
3. a kind of novel Venturi tube-type spreader flowmeter according to claim 1, it is characterised in that：The Venturi tube
Throat is equipped with positioning section, the second measuring pressure passage and end gradient section, and positioning section connects with Venturi tube ontology decompression section and interlude
The place's of connecing card slot is located by connecting, and the second measuring pressure passage and the first measuring pressure passage that Venturi tube ontology interlude is equipped with are concentric, and
Identical as the first measuring pressure passage diameter, the first measuring pressure passage and the second measuring pressure passage combine to form the second pressure tap, the end gradient
Section coordinates with Venturi tube ontology boost section with the gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319168.7A CN108444555A (en) | 2018-04-11 | 2018-04-11 | A kind of novel Venturi tube-type spreader flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319168.7A CN108444555A (en) | 2018-04-11 | 2018-04-11 | A kind of novel Venturi tube-type spreader flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108444555A true CN108444555A (en) | 2018-08-24 |
Family
ID=63199115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810319168.7A Pending CN108444555A (en) | 2018-04-11 | 2018-04-11 | A kind of novel Venturi tube-type spreader flowmeter |
Country Status (1)
| Country | Link |
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| CN (1) | CN108444555A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499231A (en) * | 2019-01-14 | 2019-03-22 | 西安交通大学 | A kind of Venturi scrubber of changeable structure |
| CN110841497A (en) * | 2019-10-30 | 2020-02-28 | 西安交通大学 | Venturi mixer with adjustable solution mixing proportion in pharmaceutical industry |
| CN117444551A (en) * | 2023-12-25 | 2024-01-26 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998023926A1 (en) * | 1996-11-23 | 1998-06-04 | Tavira Holdings Limited | Active pressure gage for a flowmeter |
| CN2420621Y (en) * | 2000-05-10 | 2001-02-21 | 温汉璋 | Inserting three throat venturi flow meter |
| CN2480813Y (en) * | 2001-02-26 | 2002-03-06 | 西安中望流量仪表有限公司 | Built-in double-venturi fluid measurer |
| CN2919197Y (en) * | 2006-05-30 | 2007-07-04 | 杨世杰 | Plug-in-type multi-throat flow measuring device equipped with accelerating installation |
| CN201229189Y (en) * | 2008-06-06 | 2009-04-29 | 王卫军 | Inserted ASME nozzle flow meter |
| CN207395817U (en) * | 2017-10-18 | 2018-05-22 | 哈尔滨理工大学 | A kind of split type Venturi tube-type spreader flowmeter |
-
2018
- 2018-04-11 CN CN201810319168.7A patent/CN108444555A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998023926A1 (en) * | 1996-11-23 | 1998-06-04 | Tavira Holdings Limited | Active pressure gage for a flowmeter |
| CN2420621Y (en) * | 2000-05-10 | 2001-02-21 | 温汉璋 | Inserting three throat venturi flow meter |
| CN2480813Y (en) * | 2001-02-26 | 2002-03-06 | 西安中望流量仪表有限公司 | Built-in double-venturi fluid measurer |
| CN2919197Y (en) * | 2006-05-30 | 2007-07-04 | 杨世杰 | Plug-in-type multi-throat flow measuring device equipped with accelerating installation |
| CN201229189Y (en) * | 2008-06-06 | 2009-04-29 | 王卫军 | Inserted ASME nozzle flow meter |
| CN207395817U (en) * | 2017-10-18 | 2018-05-22 | 哈尔滨理工大学 | A kind of split type Venturi tube-type spreader flowmeter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499231A (en) * | 2019-01-14 | 2019-03-22 | 西安交通大学 | A kind of Venturi scrubber of changeable structure |
| CN109499231B (en) * | 2019-01-14 | 2023-12-01 | 询莱流体设备(太仓)有限公司 | Venturi scrubber with changeable structure |
| CN110841497A (en) * | 2019-10-30 | 2020-02-28 | 西安交通大学 | Venturi mixer with adjustable solution mixing proportion in pharmaceutical industry |
| CN110841497B (en) * | 2019-10-30 | 2024-02-02 | 西安交通大学 | Venturi mixer with adjustable solution mixing proportion in pharmaceutical industry |
| CN117444551A (en) * | 2023-12-25 | 2024-01-26 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
| CN117444551B (en) * | 2023-12-25 | 2024-03-12 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
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Application publication date: 20180824 |
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| WD01 | Invention patent application deemed withdrawn after publication |