CN108593020A - A kind of Venturi tube flow rate-measuring device and installation method - Google Patents
A kind of Venturi tube flow rate-measuring device and installation method Download PDFInfo
- Publication number
- CN108593020A CN108593020A CN201810307602.XA CN201810307602A CN108593020A CN 108593020 A CN108593020 A CN 108593020A CN 201810307602 A CN201810307602 A CN 201810307602A CN 108593020 A CN108593020 A CN 108593020A
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- Prior art keywords
- venturi tube
- circular cone
- section
- flow rate
- measuring device
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Classifications
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- 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
Abstract
The invention discloses a kind of Venturi tube flow rate-measuring device and installation methods, the flow rate-measuring device includes the inlet cylinders section being arranged in order, circular cone contraction section, cylinder trunnion section and circular cone diffuser, it is radially provided with positive pressure port in the inlet cylinders section upper edge, it is radially equipped with negative pressure tappings in the cylinder trunnion section, be integrally formed casting, the Venturi tube circular cone contraction section and circular cone diffuser two-port outer tube diameter of the Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser is adapted with caliber in entrance pipe section；The section of the Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser is hyperbola, and the Venturi tube circular cone contraction section and circular cone diffuser both ends are respectively equipped with locating piece.The Venturi tube measurement device processing is simple, and easy for installation, processing and fabricating cost is low, can meet engineering survey needs.
Description
Technical field
The present invention relates to throttling set fields, and in particular to a kind of Venturi tube flow rate-measuring device and fills Venturi tube
Enter the method in measurement pipe.
Background technology
The principle of Venturi tube flow rate-measuring device is that one circulation area of fixed placement is small in the pipeline full of fluid
In the throttling element of pipeline section product, local contraction can be caused when by the throttling element by managing interior a fluid stream, and in contraction place, flow velocity increases
Add, static pressure reduces, and will produce that certain pressure is poor before and after throttling element, exists between the differential pressure and flow before and after throttling element certain
Functional relation can measure flow by the differential pressure before and after measurement throttling element.Common throttling element has standard orifice plate, calibrating nozzle
With Venturi tube etc..
Fluid formed before and after throttling element vortex and fluid along journey friction, make one of the total mechanical energy that fluid has
It is point irreversible to become thermal energy, it is dissipated in fluid and causes fluid pressure loss, it is therefore desirable to optimize venturi tube structure and disappear
Except vortex of the fluid before and after throttling element, the pressure loss of fluid is reduced.
In addition, standard Venturi tube contraction section and throat it is general it is machined be welded, weld seam in use
Place be easy to cause the leakage of fluid, is easily damaged.Numerically-controlled machine tool is generally used for the higher Venturi tube of requirement on machining accuracy
It is process, complex process, manufacturing cost is high, the larger Venturi tube flow rate-measuring device of usage amount is needed to find a kind of
Simply, inexpensive processing method, and install and use simplicity.
Invention content
It is an object of the present invention to overcome defect existing in the prior art, it is simple to provide a kind of processing, easy for installation,
It is at low cost, the Venturi tube flow rate-measuring device of engineering survey needs can be met.
To achieve the above object, the technical scheme is to design a kind of Venturi tube flow rate-measuring device, the streams
Amount determining device includes the inlet cylinders section being arranged in order, circular cone contraction section, cylinder trunnion section and circular cone diffuser, it is described enter
Mouth cylindrical section upper edge is radially provided with positive pressure port, and negative pressure tappings, the Venturi tube are radially equipped in the cylinder trunnion section
Circular cone contraction section, cylinder trunnion section and circular cone diffuser are integrally formed casting, the Venturi tube circular cone contraction section and circular cone
Diffuser two-port outer tube diameter is adapted with caliber in entrance pipe section；The Venturi tube circular cone contraction section, cylinder trunnion section
Section with circular cone diffuser is hyperbola, and the Venturi tube circular cone contraction section and circular cone diffuser both ends are respectively equipped with positioning
Part.Pressure tappings corresponding position is born in the measurement pipe with cylinder trunnion end to be open equipped with pressure.
The Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser are one as a preferred technical solution,
Body formed moulding.Venturi tube is made of one the processing cost that injection molding part significantly reduces Venturi tube, literary mound
In manage and pass through the abrasion of fluid in use measurement accuracy is caused to decline, Venturi tube flow measurement using the present invention dress
It sets and is conveniently replaceable.It avoids using welding procedure during the installation process simultaneously, effectively avoids the leakage problem of commissure.
The locating piece is positioning pin as a preferred technical solution,.It is equipped with positioning pin at Venturi tube both ends, on the one hand
Play the role of positioning in the replacement process of Venturi tube；Another aspect positioning pin can be clamped Venturi tube and be integrally formed casting
Part prevents Venturi tube being axially moveable in measurement pipe under action of a fluid.
The positioning pin is along Venturi tube tube wall setting 3 in one week or more positioning pin as a preferred technical solution,.Pass through
Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser are fixed on inside measurement pipe by 3 or more positioning pins, are avoided
With fluid change in location occurs for Venturi tube.
The locating piece is fastening bolt as a preferred technical solution,.Venturi tube circular cone is received using fastening bolt
Contracting section, cylinder trunnion section and circular cone diffuser are fixed, and are convenient for the replacement of Venturi tube.It will fastening when replacing Venturi tube
Bolt is removed, and Venturi tube can be axially moved along measurement pipe, complete the replacement of Venturi tube.
As a preferred technical solution, the Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser one
Body formed moulding is with entrance pipe section by heating glue connection.Hot-melt is put on the outer wall of Venturi tube, it will be literary
Venturi is put into measurement pipe, is measured site when Venturi tube reaches, is measured tube wall by heating, make the heat of Venturi tube outer wall
Melten gel melts, and completes the connection between Venturi tube and measurement pipe.
The circular cone diffuser inner surface is carved with spiral of Archimedes as a preferred technical solution,.By in circular cone
Diffuser inner surface etching spiral of Archimedes can effectively prevent fluid in diffuser eddy generation, reduce the pressure loss.
The circular cone diffuser inner surface is carved with honeycomb structure as a preferred technical solution, and the width of nick is
0.01~1mm.By etching the degree of roughness that honeycomb structure increases circular cone diffuser inner surface in circular cone diffuser inner surface,
Impurity in convection current body has absorption and collecting action.
The venturi tube inlet cylindrical section and circular cone contraction section intersection are equipped with blowdown as a preferred technical solution,
Valve.Fluid carries out erosion generation dirt per se with dirt or to pipeline in flow process, and the presence of dirt can influence to measure
Precision, therefore blowdown valve is installed on Venturi tube Flow Measurement Apparatus.
Venturi tube integrated molding casting is put into measurement pipe port as a preferred technical solution, in the text
Air bag is set inside venturi, and the inside air bag is equipped with hollow stent, and gas is by hollow stent to airbag aeration, the gas
Capsule penetrates through Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser, and air bag is clamped Venturi tube and is integrally formed casting
Axially movable by hollow stent；After Venturi tube integrated molding casting is moved to measurement position, discharged by hollow stent
Gas in air bag takes out holder and air bag, completes Venturi tube and is integrally formed placement of the casting in measurement pipe.Replace venturi
The method of cell measurement apparatus is to remove locating piece, and being put into method with reference to Venturi tube integrated molding casting takes out Venturi tube.
The advantages of the present invention are：The present invention is by expanding circular cone contraction section, cylinder throat section and circular cone
Section Section Design is dissipated into hyperbolic configuration, is alleviated the vortex phenomenon of fluid stream flow through venturi section, is alleviated the pressure of fluid
Loss；Production cost is reduced using injection molding technology processing Venturi tube, reduces difficulty of processing；Using positioning device, make text
Venturi installation and removal are more convenient, and meet engineering survey needs, have practicability.Venturi tube flow of the present invention
The measurement accuracy of measurement device is ± 1%.
Description of the drawings
Fig. 1 is venturi tube structure schematic diagram of the present invention；
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is further described.Following embodiment is only
For clearly illustrating technical scheme of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1
A kind of Venturi tube flow rate-measuring device, the flow rate-measuring device include the inlet cylinders section 1 being arranged in order, circle
Contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4 are bored, positive pressure port 5 is radially provided in 1 upper edge of inlet cylinders section,
The cylinder trunnion section 3 is radially equipped with negative pressure tappings 6, the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone
Diffuser 4 is integrally formed casting, the Venturi tube circular cone contraction section 2 and 4 two-port outer tube diameter of circular cone diffuser and entrance
Caliber is adapted in pipe section 1；The section of the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4 is
Hyperbola, the Venturi tube circular cone contraction section 2 and 4 both ends of circular cone diffuser are respectively equipped with locating piece 8.The locating piece
Positioning pin 8.For the positioning pin 8 along measuring the setting 3 of tube wall one week or more positioning pins 8, the positioning pin is equal along tube wall one week
Point.The circular cone diffuser inner surface is carved with spiral of Archimedes.4 inner surface of circular cone diffuser is carved with cellular knot
Structure, width of nick are 0.01~1mm.The Venturi tube circular cone diffuser is equipped with Blowoff ball valve 7 with measurement pipe intersection.
Venturi tube integrated molding casting is put into measurement pipe port, air bag is set inside the Venturi tube,
The inside air bag is equipped with hollow stent, and for gas by hollow stent to airbag aeration, the air bag penetrates through Venturi tube circular cone
Contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4, air bag are clamped Venturi tube and are integrally formed casting by hollow stent along axis
To movement；After Venturi tube integrated molding casting is moved to measurement position, passes through hollow stent and discharge gas in air bag, take out branch
Frame and air bag complete Venturi tube and are integrally formed placement of the casting in measurement pipe.
Embodiment 2
A kind of Venturi tube flow rate-measuring device, the flow rate-measuring device include the inlet cylinders section 1 being arranged in order, circle
Contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4 are bored, positive pressure port 5 is radially provided in 1 upper edge of inlet cylinders section,
The cylinder trunnion section 3 is radially equipped with negative pressure tappings 6, the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone
Diffuser 4 be integrally formed moulding, the Venturi tube circular cone contraction section 2 and 4 two-port outer tube diameter of circular cone diffuser with enter
Caliber is adapted in mouth pipe section 1；The section of the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4
For hyperbola, the Venturi tube circular cone contraction section 2 and 4 both ends of circular cone diffuser are respectively equipped with locating piece 8.The locating piece is
Fastening bolt.
Venturi tube integrated molding casting is put into measurement pipe port, air bag is set inside the Venturi tube,
The inside air bag is equipped with hollow stent, and for gas by hollow stent to airbag aeration, the air bag penetrates through Venturi tube circular cone
Contraction section, cylinder trunnion section and circular cone diffuser, air bag be clamped Venturi tube be integrally formed casting by hollow stent in an axial direction
Movement；After Venturi tube integrated molding casting is moved to measurement position, passes through hollow stent and discharge gas in air bag, take out holder
And air bag, it completes Venturi tube and is integrally formed placement of the casting in measurement pipe.
Embodiment 3
A kind of Venturi tube flow rate-measuring device, the flow rate-measuring device include the inlet cylinders section 1 being arranged in order, circle
Contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4 are bored, positive pressure port 5 is radially provided in 1 upper edge of inlet cylinders section,
The cylinder trunnion section 3 is radially equipped with negative pressure tappings 6, the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone
Diffuser 4 be integrally formed moulding, the Venturi tube circular cone contraction section 2 and 4 two-port outer tube diameter of circular cone diffuser with enter
Caliber is adapted in mouth pipe section 1；The section of the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4
For hyperbola, integrated molding casting and the measurement of the Venturi tube circular cone contraction section 2, cylinder trunnion section 3 and circular cone diffuser 4
Pipe is by heating glue connection.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of Venturi tube flow rate-measuring device, the flow rate-measuring device includes the inlet cylinders section being arranged in order, circular cone
Contraction section, cylinder trunnion section and circular cone diffuser are radially provided with positive pressure port, in the cylinder in the inlet cylinders section upper edge
Trunnion section is radially equipped with negative pressure tappings, which is characterized in that the Venturi tube circular cone contraction section, cylinder trunnion section and circular cone expand
Scattered section is integrally formed casting, the Venturi tube circular cone contraction section and circular cone diffuser two-port outer tube diameter and entrance pipe section
Interior caliber is adapted；The section of the Venturi tube circular cone contraction section, cylinder trunnion section and circular cone diffuser is hyperbola, described
Venturi tube circular cone contraction section and circular cone diffuser both ends are respectively equipped with locating piece.
2. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the Venturi tube circular cone is shunk
The moulding that section, cylinder trunnion section and circular cone diffuser are integrally formed.
3. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the positioning pin that the locating piece is.
4. Venturi tube flow rate-measuring device as claimed in claim 3, which is characterized in that the positioning pin is along measurement tube wall
Setting 3 in one week or more positioning pin, the positioning pin are distributed along tube wall even circumferential.
5. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the locating piece is fastening bolt.
6. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the Venturi tube circular cone is shunk
Section, the integrated molding casting of cylinder trunnion section and circular cone diffuser and measurement pipe are by heating glue connection.
7. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the circular cone diffuser inner surface is carved
There is spiral of Archimedes.
8. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the circular cone diffuser inner surface is carved
It is 0.01~1mm to have honeycomb structure, width of nick.
9. Venturi tube flow rate-measuring device as described in claim 1, which is characterized in that the Venturi tube circular cone diffuser
It is equipped with Blowoff ball valve with measurement pipe intersection.
10. a kind of method that Venturi tube flow rate-measuring device as described in claim 1 is put into measurement pipe, which is characterized in that
Venturi tube integrated molding casting is put into measurement pipe port, air bag, the air bag are set inside the Venturi tube
It is internally provided with hollow stent, gas is by hollow stent to airbag aeration, the air bag perforation Venturi tube circular cone contraction section, circle
Cylinder trunnion section and circular cone diffuser, air bag clamping Venturi tube are integrally formed casting and push casting in an axial direction by hollow stent；
After Venturi tube integrated molding casting is moved to measurement position, gas in air bag is discharged by hollow stent, it is gentle to take out holder
Capsule completes Venturi tube and is integrally formed placement of the casting in measurement pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810307602.XA CN108593020B (en) | 2018-04-08 | 2018-04-08 | Venturi tube flow measuring device and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810307602.XA CN108593020B (en) | 2018-04-08 | 2018-04-08 | Venturi tube flow measuring device and mounting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108593020A true CN108593020A (en) | 2018-09-28 |
| CN108593020B CN108593020B (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810307602.XA Active CN108593020B (en) | 2018-04-08 | 2018-04-08 | Venturi tube flow measuring device and mounting method |
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| Country | Link |
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| CN (1) | CN108593020B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109549527A (en) * | 2018-12-26 | 2019-04-02 | 黄道泓 | A kind of domestic purification multi-function robot |
| CN109738032A (en) * | 2019-03-14 | 2019-05-10 | 湖南大麓科技有限公司 | A kind of pipeline flow measurement device and method |
| CN113375741A (en) * | 2021-04-29 | 2021-09-10 | 安徽中控仪表有限公司 | Moisture two-phase flow metering device and method based on three-differential-pressure data fitting model |
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| CN106969199A (en) * | 2017-06-05 | 2017-07-21 | 恒润集团有限公司 | The installation method of submarine pipeline airbag apparatus and submarine pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113375741A (en) * | 2021-04-29 | 2021-09-10 | 安徽中控仪表有限公司 | Moisture two-phase flow metering device and method based on three-differential-pressure data fitting model |
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| Publication number | Publication date |
|---|---|
| CN108593020B (en) | 2021-01-26 |
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Denomination of invention: Venturi tube flow measuring device and installation method Effective date of registration: 20230130 Granted publication date: 20210126 Pledgee: Jiangyin branch of Bank of China Ltd. Pledgor: JIANGYIN THROTTLING DEVICE MANUFACTURER Co.,Ltd. Registration number: Y2023980031790 |