CN207395817U - A kind of split type Venturi tube-type spreader flowmeter - Google Patents
A kind of split type Venturi tube-type spreader flowmeter Download PDFInfo
- Publication number
- CN207395817U CN207395817U CN201721343261.9U CN201721343261U CN207395817U CN 207395817 U CN207395817 U CN 207395817U CN 201721343261 U CN201721343261 U CN 201721343261U CN 207395817 U CN207395817 U CN 207395817U
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- venturi tube
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- venturi
- pressure passage
- tube body
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Abstract
The utility model discloses a kind of split type Venturi tube-type spreader flowmeters, it includes Venturi tube body and venturi throat, Venturi tube body 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, and interlude is equipped with the first measuring pressure passage；The interlude of venturi throat and above-mentioned Venturi tube body is installed together using interference fit, and venturi throat is equipped with the second measuring pressure passage, and is overlapped vertically so as to forming the second pressure tap with the first measuring pressure passage.The relatively general traditional Venturi tube applicability of Venturi tube disclosed in the utility model is stronger, and not only different flow accurately can be measured, and reduces manufacturing cost and use cost, and economic benefit is very considerable.
Description
Technical field
The utility model belongs to field of flow measurement, is related to a kind of flow measurement device, and in particular to a kind of split type text
Venturi type 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
Good effect is had received in secondary wind, Secondary Air Large Diameter Pipeline, the measurement of low flow velocity pipeline meter.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 generated before and after meter throttling element.Fluid flow is bigger, and the pressure difference of generation is bigger, so can weigh flow according to pressure difference
Size.This measuring method is to flow continuity equation (mass conservation law) and Bernoulli equation (law of conservation of energy)
Based on.
The content of the invention
The purpose of this utility model is to provide a kind of improved differential pressure type Venturi tube flow measuring meter, it and common text
Venturi flow measuring meter is compared, and versatility is stronger, is realized by the design size for only changing venturi throat to not cocurrent flow
Measure the accurate measurement of air inlet scope and without replacing entire Venturi tube, so as to reduce manufacture and maintenance cost, improve through
Ji benefit.
The technical solution of the utility model is：
A kind of split type Venturi tube-type spreader flowmeter, composition include Venturi tube body and venturi throat, special
Sign is that the interlude of the Venturi tube body positions the second pressure tap with venturi throat by rectangle, and interference is matched somebody with somebody
It closes.
Further, the Venturi tube body is the Venturi tube-type spreader rectangle opened up vertically in cylindrical solid one end
Duct, successively including entrance rectangle duct section, decompression section, interlude, boost section and outlet rectangle duct section, in entrance rectangular opening
In road section, it is about away from entrance face at 1/3rd of entire entrance rectangle duct length, equipped with the first pressure tap, on interlude
About position is equipped with the first measuring pressure passage therebetween.
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 body and interlude junction card slot is located by connecting, among the second measuring pressure passage and Venturi tube body
The first measuring pressure passage that section is equipped with is concentric and identical with 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 body boost section with the gradient.
The beneficial effects of the utility model are：
1. being compared with common Venturi tube, the difference of the utility model Venturi tube maximum is exactly to be set using split type
Meter, can by only change the design size of venturi throat realize the accurate measurement to different flow air inlet scope without
With entire Venturi tube is replaced, manufacturing cost and use cost is greatly saved；
2. the utility model uses rectangular duct concealed Venturi pipe, compared to circular pipe concealed Venturi pipe,
Its differential pressure is big, precision is high, measurement range is wide, and because of its unique structure, long-time service is not susceptible to clogging.
Description of the drawings
Attached drawing 1, the structure diagram of the split type Venturi tube-type spreader flowmeter of the utility model；
Attached drawing 2, the cross-sectional view of the utility model Venturi tube body；
Attached drawing 3, the structure diagram of the utility model venturi throat；
Attached drawing 4, the cross-sectional view of the utility model venturi throat；
In figure：1st, entrance rectangle duct section, the 2, first pressure tap, 3, decompression section, the 4, second pressure tap, 5, Venturi tube
Body interlude, 6, venturi throat, 7, Venturi tube body, 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 embodiment
The concrete structure and embodiment of the utility model are further illustrated below in conjunction with attached drawing.
With reference to Fig. 1 to 4, the utility model rectangular duct is built-in and is the knot of split type Venturi tube flow measuring meter
Structure composition includes Venturi tube body（7）And venturi throat（6）.The Venturi tube body interlude（5）With literary mound
Li Guan throats（6）Second pressure tap is positioned by rectangle（4）, and be interference fitted.
The Venturi tube body（7）It is the Venturi tube-type spreader rectangle duct opened up vertically in cylindrical solid one end,
Including entrance rectangle duct section（1）, the first pressure tap（2）, decompression section（3）, Venturi tube body 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 about away from entrance face
At 1/3rd of entire entrance rectangle duct, equipped with the first pressure tap（2）；Interlude（5）On, about position is set therebetween
There is the first measuring pressure passage（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 body（3）And interlude（5）Junction card slot is determined
Position connection, the second measuring pressure passage（11）With Venturi tube body 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 body boost section（8）Coordinate with the gradient.
The course of work of the utility model is as follows：
The split type Venturi tube-type spreader flowmeter of the utility model can be met by changing throat's design size to difference
The requirement that charge flow rate scope accurately measures, the flow of required measurement is from the entrance rectangle duct of Venturi tube（1）It flows into, when it
The throttling element for flowing into Venturi meter pipeline depressurizes section（3）When, due to local contraction, thus flow velocity increases, static pressure drop
It is low, it is then entrance rectangle duct before and after the throttling element of Venturi meter（1）With decompression section（3）Between just generate pressure
Difference;Because the first pressure tap（2）With the second pressure tap（4）Respectively with entrance rectangle duct（1）And venturi throat（6）It is connected
It is logical, still can be by the first pressure tap（2）With the second pressure tap（4）Place measures respective specific pressure value respectively, from
And obtain entrance rectangular opening road（1）With decompression section（3）Between pressure difference.Fluid flow is bigger, and the pressure difference of generation is bigger, so
The size of flow can be weighed according to pressure difference.Again because venturi throat（6）Size determine measurement flow accuracy with
Scope, so when current differential pressure type flowmeter has been unable to meet the accurate measurement to current variable flow, we
By selecting to replace various sizes of venturi throat（6）It meets the requirements, and without replacing entire Venturi tube, to reduce
Production cost is increased economic efficiency.
The basic principle and main feature of the utility model has been shown and described above.The utility model is from above-mentioned implementation
The limitation of example, the principle of the simply invention of above embodiments and description description, is not departing from the spirit and model of the utility model
On the premise of enclosing, the utility model also has various changes and modifications, these inventions and improvement belong to this claimed reality
With in new scope.
Claims (3)
1. a kind of split type Venturi tube-type spreader flowmeter, composition includes Venturi tube body and venturi throat, feature
It is that the interlude of the Venturi tube body positions the second pressure tap with venturi throat by rectangle, and interference is matched somebody with somebody
It closes.
2. a kind of split type Venturi tube-type spreader flowmeter according to claim 1, it is characterised in that：Venturi tube body is
The Venturi tube-type spreader rectangle duct opened up vertically in cylindrical solid one end, successively including 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 1/3rd, equipped with the first pressure tap, position is equipped with the first measuring pressure passage therebetween on interlude.
3. a kind of split type 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 body 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 body interlude is equipped with are concentric, and
Identical with 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 body boost section with the gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343261.9U CN207395817U (en) | 2017-10-18 | 2017-10-18 | A kind of split type Venturi tube-type spreader flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343261.9U CN207395817U (en) | 2017-10-18 | 2017-10-18 | A kind of split type Venturi tube-type spreader flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207395817U true CN207395817U (en) | 2018-05-22 |
Family
ID=62328633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721343261.9U Expired - Fee Related CN207395817U (en) | 2017-10-18 | 2017-10-18 | A kind of split type Venturi tube-type spreader flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207395817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444555A (en) * | 2018-04-11 | 2018-08-24 | 哈尔滨理工大学 | A kind of novel Venturi tube-type spreader flowmeter |
| CN114005556A (en) * | 2021-10-25 | 2022-02-01 | 山东核电设备制造有限公司 | Combined type current-limiting Venturi tube suitable for CVS and machining method thereof |
-
2017
- 2017-10-18 CN CN201721343261.9U patent/CN207395817U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444555A (en) * | 2018-04-11 | 2018-08-24 | 哈尔滨理工大学 | A kind of novel Venturi tube-type spreader flowmeter |
| CN114005556A (en) * | 2021-10-25 | 2022-02-01 | 山东核电设备制造有限公司 | Combined type current-limiting Venturi tube suitable for CVS and machining method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180522 Termination date: 20181018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |