CN108020278A - It can accurately measure the wide range orifice flowmeter of tiny flow quantity - Google Patents
It can accurately measure the wide range orifice flowmeter of tiny flow quantity Download PDFInfo
- Publication number
- CN108020278A CN108020278A CN201711482552.0A CN201711482552A CN108020278A CN 108020278 A CN108020278 A CN 108020278A CN 201711482552 A CN201711482552 A CN 201711482552A CN 108020278 A CN108020278 A CN 108020278A
- Authority
- CN
- China
- Prior art keywords
- orifice
- cone governor
- cone
- flowmeter
- governor
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention relates to a kind of wide range orifice flowmeter that can accurately measure tiny flow quantity, the flowmeter includes testing agency, pressure pipe and measuring mechanism, measuring mechanism includes housing and orifice plate, housing is straight round tube, pressure pipe both ends are connected with testing agency and measuring mechanism respectively, throttle orifice is equipped with the middle part of orifice plate, further include cone governor and two limiting devices, the diameter of cone governor is slightly larger than the diameter of throttle orifice, cone governor is located above orifice plate, one end of cone governor is tapered, and the tapering point of cone governor is downwardly against on throttle orifice, two limiting devices are respectively below the top of cone governor and orifice plate, limiting device edge and inner walls are affixed.The present invention is positioned by cone governor self gravitation, and cone governor can close orifice throttle hole especially when flow is minimum, improve the precision of orifice flowmeter.
Description
Technical field
The present invention relates to a kind of measuring device for measuring fluid flow in pipeline, the orifice plate of ultra-wide range of flow is applicable to
Flowmeter, belongs to the technical field of metering.
Background technology
Orifice flowmeter is the flow measurement available for steam, gas and water at present using the most wide flowmeter of application surface.
Traditional orifice flowmeter includes testing agency, pressure pipe and measuring mechanism, and measuring mechanism includes shell and orifice plate, and pressure pipe is located at
Orifice plate both sides, pressure pipe are connected by signal transmssion line with testing agency, and throttle orifice is equipped with the middle part of orifice plate.By measuring machine during use
Structure is connected by flange with tested pipeline.
Numerous known, due to the limitation of orifice flowmeter inherent structure, its most important shortcoming is that measurement range is narrow；Work as peace
When flow in the tube body of dress flowmeter is too small, orifice flowmeter cannot measure concrete numerical value.Therefore, how orifice plate is improved
The precision of flowmeter becomes the problem of urgent need to resolve.
The content of the invention
The present invention provides a kind of wide range orifice flowmeter that can accurately measure tiny flow quantity, it can be by the amount of flowmeter
Minimum value in journey reduces, and when the flow very little in the tube body for installing flowmeter, orifice flowmeter can also measure specific number
Value.
Technical problem of the present invention solves by the following technical programs：
A kind of wide range orifice flowmeter that can accurately measure tiny flow quantity, including testing agency and pressure acquiring mechanism, pressure
Mechanism includes pressure pipe, housing and orifice plate, and housing is straight round tube, and one end of pressure pipe is connected with testing agency, in the middle part of orifice plate
Equipped with throttle orifice, the cone governor for flow-rate adjustment, upper and lower two limiting devices and connecting rod, the maximum gauge of cone governor are further included
Slightly larger than the diameter of throttle orifice, cone governor is located in the throttle orifice of orifice plate, and the shape of the cone governor is reverse taper, cone governor
Larger diameter end is located on throttle orifice, and two limiting devices are respectively positioned at the top of cone governor and the lower section of orifice plate, limiting device
Edge is affixed with inner walls by connecting rod.
The above-mentioned wide range orifice flowmeter that can accurately measure tiny flow quantity, the both ends of cone governor are equipped with guide rod, limit
Pilot hole is equipped with the middle part of the device of position, guide rod matches with pilot hole, and guide rod is located in pilot hole.
The above-mentioned wide range orifice flowmeter that can accurately measure tiny flow quantity, the limiting device are rod-shaped spacing to be rod-shaped
The both ends of device are fixed in inner walls.
The above-mentioned wide range orifice flowmeter that can accurately measure tiny flow quantity, the cone governor functional expression are：
Wherein, SZ：The real-time sectional area of cone governor；L：Cone height；S:The area of throttle orifice；K:Coefficient, passes through real stream
Calibration is drawn.
Compared with prior art, beneficial effects of the present invention are：The present invention adjusts flow by cone governor self gravitation, when
When flow is minimum, cone governor can completely enclose orifice throttle hole, so as to close fluid passage, prevent fluid by abnormally
Leakage.In addition, when flow very little, the measurement accuracy of orifice flowmeter by the automatic adjustment of cone governor, can also be improved.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the top view of the present invention；
Fig. 3 is the bottom view of the present invention.
Each label is expressed as in figure:1. testing agency；2. pressure pipe；3. measuring mechanism；31. housing；32. orifice plate；
33. throttle orifice；34. cone governor；341. guide rod；35. connecting rod；351. limiting device.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in Figure 1 to Figure 2, the present invention is used for the flow for measuring the fluid in vertical pipeline, and the present invention includes detection machine
Structure 1, pressure pipe 2 and measuring mechanism 3, measuring mechanism include housing 31 and orifice plate 32, and housing is straight round tube, and pressure pipe is located at hole
Plate both sides, pressure pipe are connected by signal transmssion line with testing agency, are equipped with throttle orifice 33 in the middle part of orifice plate, are further included cone governor 34
With two limiting devices 351, the diameter of cone governor is more than the diameter of throttle orifice, and cone governor is located above orifice plate, and the one of cone governor
Hold tapered, and the tapering point of cone governor is downwardly against on throttle orifice, two limiting devices respectively positioned at the top of cone governor and
Below orifice plate, limiting device edge and inner walls are affixed.Limiting device is preferably rod-shaped, and the both ends of rod-shaped limiting device are affixed
In inner walls.
During installation, the tapering point of cone governor is downward, and housing 31 is vertical with horizontal plane holding.Flowmeter is vertically installed at
In pipeline.The power that fluid is moved upwards by throttle orifice, fluid to the side wall of the tapering point of cone governor from bottom to top, so that adjusting
Pitch cone and throttling bore edges are formed separately passage.With of different sizes, cone governor and the separated degree of bore edges that throttles of flow
It can change.The curve equation of curved surface sidewall for forming cone governor is：
Wherein, SZ：The real-time sectional area of cone governor；L：Cone height；S:The area of throttle orifice；K:Coefficient, passes through real stream
Calibration is drawn.
When cone governor moves up and down, the center line of cone governor once deviates the influence that can cause fluid flow state,
So as to cause the error of pressure pipe pressure.For the disalignment of cone governor, the top and bottom of cone governor are equipped with guiding
Bar 341, is equipped with pilot hole in the middle part of the limiting device above and below cone governor, guide rod matches with pilot hole, and guiding
Boom end is located in pilot hole.
The calculation formula of existing flowmeter is：
qm:Flow；C：Discharge coefficient；β：Equivalent circulation diameter and caliber ratio；S：Circulation area；Δp:Orifice plate pre-post difference
Pressure；ρ：Density；
Using the equipment of the present invention, the formula after pushing over is
In practical applications, then by simplified formula it is：
qm:Flow；C：Discharge coefficient；β：Equivalent circulation diameter and caliber ratio；S0：Circulation area；Δp:Orifice plate pre-post difference
Pressure；ρ：Density, K：Discharge coefficient, is a nonlinear factor changed with differential pressure, is determined by failing to be sold at auction surely in fact.
Claims (4)
1. a kind of wide range orifice flowmeter that can accurately measure tiny flow quantity, including testing agency (1) and pressure acquiring mechanism (3),
Pressure acquiring mechanism (3) includes pressure pipe (2), housing (31) and orifice plate (32), and housing (31) is straight round tube, and the one of pressure pipe (2)
End is connected with testing agency (1), is equipped with throttle orifice (33) in the middle part of orifice plate (32), it is characterised in that further include for flow-rate adjustment
Cone governor (34), upper and lower two limiting devices (351) and connecting rod (35), the maximum gauge of cone governor (34) is slightly larger than throttle orifice
(33) diameter, cone governor (34) are located in the throttle orifice (33) of orifice plate, and the shape of the cone governor (34) is reverse taper, adjust
The larger diameter end of cone (34) is located on throttle orifice (33), and two limiting devices (351) are located at the top of cone governor (34) respectively
It is affixed by connecting rod and housing (31) inner wall with the lower section of orifice plate (32), limiting device (351) edge.
2. the wide range orifice flowmeter as claimed in claim 1 that can accurately measure tiny flow quantity, it is characterised in that cone governor
(34) both ends are equipped with guide rod (341), and pilot hole, guide rod (341) and pilot hole phase are equipped with the middle part of limiting device (351)
Matching, and guide rod (341) is located in pilot hole.
3. the wide range orifice flowmeter as claimed in claim 2 that can accurately measure tiny flow quantity, it is characterised in that the limit
Position device (351) is rod-shaped, and the both ends of rod-shaped limiting device (351) are fixed on housing (31) inner wall.
4. the wide range orifice flowmeter as claimed in claim 3 that can accurately measure tiny flow quantity, it is characterised in that the tune
Pitch cone (34)
Functional expression is：
<mrow>
<mi>S</mi>
<mi>z</mi>
<mo>=</mo>
<mi>S</mi>
<mo>-</mo>
<mfrac>
<mi>S</mi>
<msqrt>
<mi>K</mi>
</msqrt>
</mfrac>
<mo>&times;</mo>
<msqrt>
<mi>L</mi>
</msqrt>
</mrow>
Wherein, SZ：The real-time sectional area of cone governor；L：Cone height；S:The area of throttle orifice；K:Coefficient, is determined by real fail to be sold at auction
Go out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482552.0A CN108020278A (en) | 2017-12-29 | 2017-12-29 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482552.0A CN108020278A (en) | 2017-12-29 | 2017-12-29 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108020278A true CN108020278A (en) | 2018-05-11 |
Family
ID=62071043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711482552.0A Pending CN108020278A (en) | 2017-12-29 | 2017-12-29 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108020278A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282864A (en) * | 2018-08-19 | 2019-01-29 | 中国海洋石油总公司 | A kind of underground V cone gas flow testing device |
| CN111693099A (en) * | 2020-06-24 | 2020-09-22 | 江苏杰创流量仪表有限公司 | Anticorrosive type orifice flowmeter |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237836Y (en) * | 1996-02-15 | 1996-10-16 | 承德北光·友升仪表有限公司 | Short-travel linearing graduation float flowmeter |
| CN2593160Y (en) * | 2002-12-25 | 2003-12-17 | 上海华辰科技发展有限公司 | Float flowmeter sensor |
| CN2593159Y (en) * | 2002-12-25 | 2003-12-17 | 上海华辰科技发展有限公司 | Wide-range float flow sensor |
| CN1512145A (en) * | 2002-12-27 | 2004-07-14 | 上海华辰科技发展有限公司 | Inductive float flow transmitter |
| CN102121837A (en) * | 2011-01-10 | 2011-07-13 | 天津大学 | Biconical orifice plate float flow sensor |
| KR20130058356A (en) * | 2011-11-25 | 2013-06-04 | 주식회사 하이트롤 | Cone type differential pressure flow measuring apparatus |
| CN203414141U (en) * | 2013-08-20 | 2014-01-29 | 丹东通博电器(集团)有限公司 | Metal pipe horizontal-type float flowmeter |
| CN207816367U (en) * | 2017-12-29 | 2018-09-04 | 邯郸市邯钢集团信达科技有限公司 | Wide range orifice flowmeter |
-
2017
- 2017-12-29 CN CN201711482552.0A patent/CN108020278A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237836Y (en) * | 1996-02-15 | 1996-10-16 | 承德北光·友升仪表有限公司 | Short-travel linearing graduation float flowmeter |
| CN2593160Y (en) * | 2002-12-25 | 2003-12-17 | 上海华辰科技发展有限公司 | Float flowmeter sensor |
| CN2593159Y (en) * | 2002-12-25 | 2003-12-17 | 上海华辰科技发展有限公司 | Wide-range float flow sensor |
| CN1512145A (en) * | 2002-12-27 | 2004-07-14 | 上海华辰科技发展有限公司 | Inductive float flow transmitter |
| CN102121837A (en) * | 2011-01-10 | 2011-07-13 | 天津大学 | Biconical orifice plate float flow sensor |
| KR20130058356A (en) * | 2011-11-25 | 2013-06-04 | 주식회사 하이트롤 | Cone type differential pressure flow measuring apparatus |
| CN203414141U (en) * | 2013-08-20 | 2014-01-29 | 丹东通博电器(集团)有限公司 | Metal pipe horizontal-type float flowmeter |
| CN207816367U (en) * | 2017-12-29 | 2018-09-04 | 邯郸市邯钢集团信达科技有限公司 | Wide range orifice flowmeter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282864A (en) * | 2018-08-19 | 2019-01-29 | 中国海洋石油总公司 | A kind of underground V cone gas flow testing device |
| CN109282864B (en) * | 2018-08-19 | 2020-03-20 | 中国海洋石油总公司 | Downhole V-cone gas flow testing device |
| CN111693099A (en) * | 2020-06-24 | 2020-09-22 | 江苏杰创流量仪表有限公司 | Anticorrosive type orifice flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2061852A (en) | Flow bean valve | |
| CN207298000U (en) | Balanced valve | |
| CN102183284B (en) | Liquid flow standard calibration device | |
| CN105651351B (en) | A kind of burette type gas flow surveying instrument and method based on weighing principle | |
| CN202584505U (en) | Test instrument for venturi and orifice plate flowmeters | |
| CN108020278A (en) | It can accurately measure the wide range orifice flowmeter of tiny flow quantity | |
| CN103868560B (en) | Measuring method of three-phase mixed-transportation constant volume pipe piston type oil-gas-water three-phase flow meter | |
| CN104406646A (en) | Measurement device of pulverized coal mass flow meter | |
| CN101699264B (en) | Testing device and testing method for emission reduction of maintenance liquid in pipeline | |
| CN203551033U (en) | Blowing type level gauge | |
| CN207816367U (en) | Wide range orifice flowmeter | |
| CN202057396U (en) | Standard liquid flow calibration device | |
| CN202976607U (en) | Orifice/mouthpiece experimental apparatus | |
| US3141331A (en) | Fluid flow meters of the variable orifice type | |
| CN205607482U (en) | Liquid automatic measurement device is joined in marriage to chemical industry | |
| CN209783694U (en) | Differential pressure type liquid level transmitter | |
| US7703338B2 (en) | Steam meter | |
| US3024654A (en) | High-capacity rotameter | |
| CN204177443U (en) | A kind of pressure-stabilizing constant flow system of bowl mill differential pressure bin material level measurement system | |
| CN203688180U (en) | Automatic blowby and leakage measuring apparatus for valve | |
| CN206772386U (en) | A kind of pressure differential method liquid level measuring system | |
| CN208091504U (en) | Vertical venturi moisture measuring device based on porous ring casing pressure vessel | |
| CN220625448U (en) | Double-float flowmeter | |
| CN208398948U (en) | It is a kind of for measuring the throttling set pressure vessel of flux of moisture | |
| CN204202667U (en) | Pulverized coal mass flow measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |