CN103048022A - Balance type flow meter throttling element - Google Patents
Balance type flow meter throttling element Download PDFInfo
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- CN103048022A CN103048022A CN2012105595620A CN201210559562A CN103048022A CN 103048022 A CN103048022 A CN 103048022A CN 2012105595620 A CN2012105595620 A CN 2012105595620A CN 201210559562 A CN201210559562 A CN 201210559562A CN 103048022 A CN103048022 A CN 103048022A
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- throttling element
- hole
- flow meter
- circumference
- balance type
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Abstract
The invention relates to a balance type flow meter throttling element. A through hole is arranged at a center shaft of the throttling element, the throttling element is in the shape of a circular ring, four to eight pores are evenly arranged between the through hole and the peripheral edge of the throttling element, the axes of the pores are respectively parallel to the axis of the through hole, and two round faces of the throttling element are respectively sunk towards the center of the throttling element from the peripheral edge of the throttling element to form two inclined planes. The balance type flow meter throttling element has the advantages that turbulent flow and eddy are decreased, kinetic energy loss is reduced, operating cost is saved, and the balance type flow meter throttling element is specially used for measuring laminar flow.
Description
Technical field
The present invention relates to a kind of balance flow meter throttling element, can measure the full packages fluid of the media such as various gases (air, coal gas, rock gas etc.), steam (saturated vapour, superheated vapor), liquid (chemical liquid such as water-soluble solution).
Background technology
The measuring principle of standard orifice flow meter, differential pressure type flow instrument is take flow continuity equation (law of conservation of mass) and Bernoulli equation (law of conservation of energy) as the basis.When the throttling element of the flow that is full of pipeline in pipeline, flow velocity will form at the throttling element place local contraction, thereby flow velocity increases, and static pressure reduces, so just produced pressure reduction before and after throttling element.Fluid flow is larger, and the pressure reduction of generation is larger, and being directly proportional with the square root of differential pressure according to fluid flow obtains flow value.
But there are many problems in standard orifice flow meter in the process of using.The first, the crushing that standard orifice plate causes is large, and it is slow that pressure recovers.The second, straight length requires high, is not less than generally that 5D(D is the internal diameter of tested pipeline behind the front 10D, and 10D represents: 10 times of sizes of tested pipeline internal diameter), on-the-spot mounting condition is required harsh.The 3rd, when measuring laminar flow, precision is low.
Summary of the invention
The object of the invention is to overcome problems of the prior art, a kind of formation that reduces turbulent flow and eddy current is provided, reduce kinetic energy rejection and save operating cost, be exclusively used in the balance flow meter throttling element of measuring laminar flow.
The present invention is achieved in that a kind of balance flow meter throttling element, the axis position of described throttling element is provided with a through hole, form circular, 4 ~ 8 apertures have been evenly arranged between described through hole and the described throttling element neighboring, the axis of individual aperture is parallel with the axis of described through hole respectively, it is characterized in that: the central concave to throttling element forms 2 inclined-planes to two discs of described throttling element from the neighboring of throttling element genesis respectively.
The distance of the point o'clock to the aperture circumference on the described through hole circumference or the point on the described aperture circumference point to another aperture circumference, more than or equal to 3 mm, and less than 0.45 times of throttling element diameter.
The wall thickness at the circumference place of described through hole is more than or equal to 0mm, and less than the wall thickness at place, throttling element neighboring.
Described throttling element is centrosymmetric.
The invention has the beneficial effects as follows: reduce the formation of turbulent flow and eddy current, reduce kinetic energy rejection and save operating cost.Throttling element can be measured bidirectional flow about Central Symmetry; According to the design of velocity flow profile feature employing porous, utilize barrier bodies to separate runner, adjust the velocity flow profile in the runner, therefore also have the effect of rectification, to the requirement reduction of straight length.In laminar motion, viscous force plays a leading role, and the liquid particle does not interfere with each other, and does not mix mutually, and fluid layering flows.Throttling element forms the inclined-plane from the circumference of central through hole to the throttling element neighboring, so throttling element and fluid contact level are the inclined-plane, there is the masterpiece perpendicular to surface of contact to be used for fluid, add the porous rectification effect, can change pipeline fluid velocity flow profile state, improve the characteristic of laminar flow, be particularly suitable for measuring the laminar flow medium.
Description of drawings
Fig. 1 is the structural representation of throttling element of the present invention
Fig. 2 is that the A-A of Fig. 1 is to cut-open view.
Fig. 3 is the structural representation of inventive embodiments one.
Fig. 4 is that the B-B of Fig. 3 is to cut-open view.
Wherein: 1, throttling element; 2, through hole; 3, inclined-plane; 4, aperture; 5, circumference; 6, periphery.
Embodiment
According to Fig. 1, Fig. 2, the axis position of described throttling element 1 is provided with a through hole 2 so that described throttling element 1 is circular, and former and later two discs of described throttling element 1 form inclined-plane 3 to the central concave of throttling element 1 respectively from periphery 6 edges of throttling element 1.4 ~ 8 apertures 4 have been evenly arranged between the neighboring of described through hole 2 and described throttling element 1, the axis of described aperture 4 is parallel with the axis of described through hole 2 respectively, the distance of the point o'clock to an aperture 4 circumference on described through hole 2 circumference or the point on described aperture 4 circumference point to another aperture circumference, more than or equal to 3 mm, and less than 0.45 times of throttling element diameter.The wall thickness at circumference 5 places of described through hole 2 is more than or equal to 0mm, and less than the wall thickness at place, throttling element neighboring 6, among Fig. 1, Fig. 2, the wall thickness at circumference 5 places of described through hole 2 is 0mm.Described throttling element 1 is centrosymmetric.
Embodiment one: according to Fig. 3, Fig. 4, be evenly arranged 4 apertures 4 between periphery 6 edges of described through hole 2 and described throttling element 1, the wall thickness at circumference 5 places of described through hole 2 is 5mm less than the wall thickness of throttling element periphery 6, the wall thickness at 6 places, neighboring is 15mm, all the other structures such as above-mentioned.
Claims (4)
1. balance flow meter throttling element, the axis position of described throttling element is provided with a through hole, form circular, 4 ~ 8 apertures have been evenly arranged between described through hole and the described throttling element neighboring, the axis of described aperture is parallel with the axis of described through hole respectively, it is characterized in that: the central concave to throttling element forms 2 inclined-planes to two discs of described throttling element from the neighboring of throttling element genesis respectively.
2. described a kind of balance flow meter throttling element according to claim 1, it is characterized in that: the distance of the point o'clock to the aperture circumference on the described through hole circumference or the point on the described aperture circumference point to another aperture circumference, more than or equal to 3 mm, and less than 0.45 times of throttling element diameter.
3. described a kind of balance flow meter throttling element according to claim 1 is characterized in that: the wall thickness at the circumference place of described through hole is more than or equal to 0mm, and less than the wall thickness at place, throttling element neighboring.
4. described a kind of balance flow meter throttling element according to claim 1, it is characterized in that: described throttling element is centrosymmetric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105595620A CN103048022A (en) | 2012-12-21 | 2012-12-21 | Balance type flow meter throttling element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105595620A CN103048022A (en) | 2012-12-21 | 2012-12-21 | Balance type flow meter throttling element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103048022A true CN103048022A (en) | 2013-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105595620A Pending CN103048022A (en) | 2012-12-21 | 2012-12-21 | Balance type flow meter throttling element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103048022A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096501Y (en) * | 2007-08-29 | 2008-08-06 | 西安众望测控仪表有限责任公司 | Insertion type rectifying type flow meter |
| CN101311683A (en) * | 2007-12-29 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | Breathing machine and its low differential pressure type flow quantity detection mechanism |
| WO2011144641A1 (en) * | 2010-05-17 | 2011-11-24 | Mindray Medical Sweden Ab | Coaxial means for measuring a flow and a method of measuring a flow |
| CN202255485U (en) * | 2011-08-26 | 2012-05-30 | 中国石油天然气股份有限公司 | High-pressure and pressure-difference flow measurement hole plate |
| CN202403742U (en) * | 2011-11-24 | 2012-08-29 | 承德菲时博特自动化设备有限公司 | Porous balanced throttling meter |
| CN202494478U (en) * | 2012-01-19 | 2012-10-17 | 上海华强浮罗仪表有限公司 | Plug-in balance flow meter |
| CN202994219U (en) * | 2012-12-21 | 2013-06-12 | 上海华强浮罗仪表有限公司 | Balance flowmeter throttling element |
-
2012
- 2012-12-21 CN CN2012105595620A patent/CN103048022A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096501Y (en) * | 2007-08-29 | 2008-08-06 | 西安众望测控仪表有限责任公司 | Insertion type rectifying type flow meter |
| CN101311683A (en) * | 2007-12-29 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | Breathing machine and its low differential pressure type flow quantity detection mechanism |
| WO2011144641A1 (en) * | 2010-05-17 | 2011-11-24 | Mindray Medical Sweden Ab | Coaxial means for measuring a flow and a method of measuring a flow |
| CN202255485U (en) * | 2011-08-26 | 2012-05-30 | 中国石油天然气股份有限公司 | High-pressure and pressure-difference flow measurement hole plate |
| CN202403742U (en) * | 2011-11-24 | 2012-08-29 | 承德菲时博特自动化设备有限公司 | Porous balanced throttling meter |
| CN202494478U (en) * | 2012-01-19 | 2012-10-17 | 上海华强浮罗仪表有限公司 | Plug-in balance flow meter |
| CN202994219U (en) * | 2012-12-21 | 2013-06-12 | 上海华强浮罗仪表有限公司 | Balance flowmeter throttling element |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |