CN201488758U - Balance segmental orifice plate differential pressure type flowmeter - Google Patents
Balance segmental orifice plate differential pressure type flowmeter Download PDFInfo
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- CN201488758U CN201488758U CN2009200138177U CN200920013817U CN201488758U CN 201488758 U CN201488758 U CN 201488758U CN 2009200138177 U CN2009200138177 U CN 2009200138177U CN 200920013817 U CN200920013817 U CN 200920013817U CN 201488758 U CN201488758 U CN 201488758U
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- orifice plate
- differential pressure
- balance
- segmental
- measured hole
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Abstract
The utility model relates to a balance segmental orifice plate differential pressure type flowmeter which comprises a similar segmental orifice plate throttle device, wherein the two sides of the throttle device are provided with pressure tapping holes, the pressure tapping mode is flange tapping pressure, and an orifice plate of the throttle device is provided with a circular arc shaped measuring hole. The balance segmental orifice plate differential pressure type flowmeter is characterized in that one side of the circular arc shaped measuring hole on the orifice plate of the throttle device is further provided with a measuring hole whose aperture is smaller than the circular arc shaped measuring hole, and besides adding the measuring hole whose aperture is smaller than the circular arc shaped measuring hole, the orifice plate of the throttle device is further winded with a measuring hole whose aperture is smaller. The balance segmental orifice plate differential pressure type flowmeter besides is suitable to measure the flow rate of wet steam, generator gas and gas containing water, oil and solid particles and the like, has the same excellent effects to low pressure multi-phase smudgy mediums containing bubbles and particles and the like, enlarges the application scope of the segmental orifice plate, increases the instrument precision, and has the characteristics of low pressure loss, abrasion resistance, smudgy resistance, high differential pressure value, energy conservation and low maintenance.
Description
Technical field
The utility model relates to a kind of differential pressure flowmeter; particularly relate to a kind of have degree of precision, energy-conservation, the low balance segmental orifice plate differential pressure flowmeter of safeguarding; it is improvement to existing segmental orifice plate differential pressure flowmeter structure; belong to the novel differential pressure type flow measurement technology; be applicable to the liquid measure that contains solid particle or entrapped air in the detected fluid, be specially adapted to the flow measurement of dirty medium.
Background technology
The segmental orifice plate differential pressure flowmeter can only be installed on level or the tilted tube; be used for the liquid measure that detected fluid contains solid particle or entrapped air; for example be used for measuring wet steam, producer gas, coke-oven gas, blast furnace gas, mixed gas, flue coal gas, moisture oil drop liquid etc.; when being used for the flow measurement of dirty medium; can make the medium that contains precipitated impurities or suspended impurity easier, can not form and pile up and the influence measurement at the orifice plate front end by orifice plate.
When measured medium is humid gas and pipe level layout, might there be the liquid of micro-laminar flow in duct bottom, select for use the segmental orifice plate differential pressure flowmeter can make liquid pass through throttling element smoothly from the round segmental part branch of Lower Half, and can the accurate orifice plate of image scale like that with liquid obscures before throttling element, so that hydrops influences measuring accuracy.As a same reason, when containing dust in the tested gas, because dust density is more much bigger than gas, wherein some particle is pressed close to duct bottom easily and is taken away by air-flow, select the segmental orifice plate differential pressure flowmeter for use, particle also can pass through throttling element smoothly, and can not cause particle to pile up before throttling element like that by the accurate orifice plate of image scale.
Segmental orifice plate in the segmental orifice plate differential pressure flowmeter belongs to non-standard throttling element, carries out the used throttling bodies of on-the-spot flow measurement at present and mostly is the standard throttling element.Standard orifice plate is because orifice plate is concentric with tubular axis, to flowing identical restriction effect is arranged, this has no problem to measuring uniform fluid, but to the liquid of wet steam, producer gas, moisture oils, the gas that contains solid particle and entrapped air etc., produce during through throttling element and separate, be deposited in upstream side, thereby changed pipeline section, influenced measuring accuracy, serious also can stop up orifice plate, makes surveying work can't carry out at all.
Segmental orifice plate design studies in order to prevent above-mentioned situation, many researchs and experiment have all shown near the characteristic that all helps alleviating and avoiding gathering impurity when inclined to one side segmental orifice plate is used for horizontal pipe orifice plate, therefore are specially adapted to measure the gas of wet steam, producer gas, moisture, oily, solid particle etc.
The shortcoming of existing segmental orifice plate flowmeter is:
(1) measuring accuracy is generally on the low side;
(2) measurement range is narrow, generally only 3: 1～4: 1;
(3) on-the-spot mounting condition is required height;
(4) crushing is bigger.
Differential pressure flowmeter is generally by restriction device, differential pressure transmitter and integrating instrument three parts are formed. and existing segmental orifice plate flowmeter is owing to have only an opening, lack the both sides, top at circle and produce a large amount of eddy current, consumed pressure potential wherein, can cause very big permanent compression loss; And at random and mix the formed noise of eddy current, cause measure linear degree and repeatability to reduce; When containing gas and granular pattern impurity in the tested dirty medium, though granular pattern impurity more easily passes through from the segmental orifice plate bottom, gas can rise and accumulate in the top of segmental orifice plate, causes the unstable distortion of pressure reduction.Segmental orifice plate can cause the bigger variation of medium fluidised form, forms very big disturbance, and it is very slow that pressure medium recovers, and causing need very long straight length.
The utility model content
The purpose of this utility model is to overcome the prior art above shortcomings, provide a kind of crushing little, can measure low pressure and dirty and contain the balance segmental orifice plate differential pressure flowmeter of gas medium.This differential pressure flowmeter has that crushing is little, wear-resistant, the dirt that bears dirty, differential pressure value height, energy-conservation, the low characteristics of safeguarding, it is wide to measure range ratio, can measure polyphasic flows such as gas-liquid, and throttle resistance is little, processing and fabricating precision height.
The technical scheme that the utility model provides is: this balance segmental orifice plate differential pressure flowmeter, include balance segmental orifice plate restriction device, be provided with pressure port in these restriction device both sides, ways of measure pressure is the flange pressure, wherein this restriction device orifice plate is provided with the measured hole of a circular shape, is characterized in that a side of the circular shape measured hole on the described restriction device orifice plate also has additional the measured hole of an aperture less than the circular shape measured hole.
For better finishing the purpose of this utility model, the aperture of setting up on the described restriction device orifice plate also is surrounded with the littler measured hole in aperture outward less than the measured hole of circular shape measured hole.
Size and branch Bouyei actual needs at the measured hole of setting up described in the technique scheme are designed, and the pressure port and the flange ways of measure pressure that are provided with in these restriction device both sides are fully identical with existing segmental orifice plate, meet country or international relevant criterion.The shape of described balance segmental orifice plate also can be other satisfactory shape except circle.
For better finishing the purpose of this utility model, described restriction device is the left-right symmetric structure.
For better finishing the purpose of this utility model, described material of setting up the restriction device of measured hole can be stainless, or other material of choosing by on-the-spot technological requirement.
For better finishing the purpose of this utility model, set up on the described restriction device between the aperture of measured hole and can be communicated with.
For better finishing the purpose of this utility model, the shape of setting up the aperture of measured hole on the described restriction device can be circle, grooved, rectangle etc.
For better finishing the purpose of this utility model, the aperture of setting up measured hole on the described restriction device can multilayer distribute, and also can arrange distribution more, maybe can become radial distribution etc.,
In technique scheme, pressure port setting subsidiary on the described restriction device meets the regulation of GB/T2624-2006, or meets the regulation relevant with differential-pressure instrumentation that country formulates.
Principle of work of the present utility model is: when fluid flows through ducted balance segmental orifice plate, fluid will being balanced throttling, eddy current is minimized, form the approximate ideal fluid, wherein contained gas, moisture content and granular pattern impurity all than being easier to by this pressure obtaning device, can not be formed on the delay that the balance restriction device is signed.Because the variation of area of passage before and after restriction device, has produced certain pressure reduction, can obtain stable differential pressure signal, read differential pressure information, flow velocity is directly proportional with the square root of the differential pressure that produces by change pipeline circulation area, calculates volumetric flow rate, mass rate according to Bernoulli equation.
Compared with prior art, the beneficial effects of the utility model are: except that being applicable to the flow measurements such as gas of measuring wet steam, producer gas, moisture, oily, solid particle, to low pressure and contain bubble and heterogeneous dirty medium such as particle has good result equally, enlarged the scope of application of segmental orifice plate, improved accuracy of instrument, had that crushing is little, wear-resistant, a dirt that bears dirty, differential pressure value height, energy-conservation, the low characteristics of safeguarding.
Description of drawings
Fig. 1 is existing segmental orifice plate structural representation;
Fig. 2 is the side view of Fig. 1;
Fig. 3 provides the structural representation of embodiment for the utility model;
Fig. 4 is the side view of Fig. 3.
Embodiment
As Fig. 1～shown in Figure 2, existing segmental orifice plate structure is the measured hole 6 that only is provided with a circular shape on segmental orifice plate 5, the diameter of segmental orifice plate 5 is 98% of pipe diameters, the center of circle of the circular arc portion of perforate should accurately be fixed, make it concentric, can guarantee that like this perforate can not hide by the pad at pipeline and two ends or owing to pipeline is eccentric with pipeline.
As Fig. 3～shown in Figure 4, this balance segmental orifice plate differential pressure flowmeter, include balance segmental orifice plate restriction device 1, be provided with pressure port in these restriction device 1 both sides, ways of measure pressure is the flange pressure, wherein this restriction device 1 orifice plate is provided with the measured hole 2 of a circular shape, and a side of the circular shape measured hole 2 on restriction device 1 orifice plate also has additional the different measurement in a plurality of apertures 3 and 4.
The aperture of its measured hole 2, measured hole 3 and measured hole 4 is precision machined according to the strict process standard, and the size in hole and distribution draw according to actual needs is designed.
During use, balance segmental orifice plate restriction device 1 of the present utility model is installed in the pipeline, installation requirement is with common segmental orifice plate, when fluid flows through ducted balance segmental orifice plate restriction device 1, because variation has taken place in flow section, measured hole 2, measured hole 3 and measured hole 4 make fluid shrink by the distribution of throttling element open-cellular form, play the effect of rectifier simultaneously, balance segmental orifice plate restriction device 1 can be by the measured hole arrangement flow field of setting up, the kinetic energy and the potential energy of symmetry are provided, flowing field stability improves greatly, and the linearity is promoted than conventional throttle device, reduces turbulent shear power significantly, fluid rheology stress forms with relevant eddy current.Even small differential pressure is also very stable, because balance segmental orifice plate restriction device 1 front and back have produced certain pressure reduction, read differential pressure information, the funtcional relationship of root a tree name differential pressure and flow, thus draw pipeline flow.
Can be according to the needs of measured flux range in the practical application, the demand of the throttling element pressure loss, adjust the utility model version, such as the form of measured hole, quantity, distribution etc.The same with throttling devices such as other orifice plates, working temperature, pressure depend on the material and the grade of pipeline and flange;
Because measured hole 3 and measured hole 4, disperse stressedly, be not afraid of wearing and tearing, there is not acute angle, no acute angle wearing and tearing, its β value can remain unchanged for a long time, and whole instrument does not have movable member, so need not to repeat demarcation, and long-time stability are good, long service life.The measured hole stream field carries out the balance rectification, has reduced eddy current, vibration and signal noise, and flowing field stability improves greatly, and the impurity in the measured medium is easier of this restriction device simultaneously.
This balance segmental orifice plate differential pressure flowmeter has identical using method and profile with the segmental orifice plate differential pressure flowmeter, therefore can directly replace the segmental orifice plate differential pressure flowmeter, without any need for the variation of pipe arrangement and the change of correlate meter, and for measured hole 3 and measured hole 4, can be according to the situation setting of measured medium, thus can significantly reduce the chance that allows dirty medium stop up.
Claims (6)
1. balance segmental orifice plate differential pressure flowmeter, include balance segmental orifice plate restriction device, be provided with pressure port in these restriction device both sides, ways of measure pressure is the flange pressure, wherein this restriction device orifice plate is provided with the measured hole of a circular shape, it is characterized in that a side of the circular shape measured hole on the described restriction device orifice plate also has additional the measured hole of an aperture less than the circular shape measured hole.
2. balance segmental orifice plate differential pressure flowmeter according to claim 1 is characterized in that the aperture set up on the described restriction device orifice plate also is surrounded with the littler measured hole in aperture outward less than the measured hole of circular shape measured hole.
3. balance segmental orifice plate differential pressure flowmeter according to claim 1 is characterized in that described restriction device is the left-right symmetric structure.
4. balance segmental orifice plate differential pressure flowmeter according to claim 1 is characterized in that setting up on the described restriction device between the aperture of measured hole and is communicated with.
5. balance segmental orifice plate differential pressure flowmeter according to claim 1, it is characterized in that setting up on the described restriction device measured hole the aperture be shaped as a kind of in circle, grooved, the rectangle.
6. balance segmental orifice plate differential pressure flowmeter according to claim 1 is characterized in that the aperture of setting up measured hole on the described restriction device is multilayer distribution or many row's distributions or radially distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200138177U CN201488758U (en) | 2009-05-19 | 2009-05-19 | Balance segmental orifice plate differential pressure type flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200138177U CN201488758U (en) | 2009-05-19 | 2009-05-19 | Balance segmental orifice plate differential pressure type flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN201488758U true CN201488758U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200138177U Expired - Fee Related CN201488758U (en) | 2009-05-19 | 2009-05-19 | Balance segmental orifice plate differential pressure type flowmeter |
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| CN (1) | CN201488758U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687876A (en) * | 2016-08-06 | 2018-02-13 | 赵乐 | A kind of measurement apparatus and measuring method for measuring fluid flow |
| CN109723702A (en) * | 2019-01-22 | 2019-05-07 | 浙江理工大学 | A kind of novel rectifying method |
| CN109870199A (en) * | 2019-03-22 | 2019-06-11 | 深圳市富罗瑞达仪器仪表有限公司 | A kind of tilting sand prevention shunting flowmeter |
-
2009
- 2009-05-19 CN CN2009200138177U patent/CN201488758U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687876A (en) * | 2016-08-06 | 2018-02-13 | 赵乐 | A kind of measurement apparatus and measuring method for measuring fluid flow |
| CN109723702A (en) * | 2019-01-22 | 2019-05-07 | 浙江理工大学 | A kind of novel rectifying method |
| CN109723702B (en) * | 2019-01-22 | 2024-03-12 | 浙江理工大学 | Novel rectifying method |
| CN109870199A (en) * | 2019-03-22 | 2019-06-11 | 深圳市富罗瑞达仪器仪表有限公司 | A kind of tilting sand prevention shunting flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIAONING FOCUS TECHNOLOGY CO. LTD. Free format text: FORMER NAME: SHENYANG FOCUS TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 110034 No. 19 Ling Bei street, Huanggu District, Liaoning, Shenyang Patentee after: Liaoning Focus Technology Co.,Ltd. Address before: 110021, No. 5-2, four East North Road, Tiexi District, Liaoning, Shenyang 411 Patentee before: Liaoyang Focus Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20140519 |