CN105004392A - Flowmeter throttling part beneficial for measurement accuracy - Google Patents
Flowmeter throttling part beneficial for measurement accuracy Download PDFInfo
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- CN105004392A CN105004392A CN201510500045.XA CN201510500045A CN105004392A CN 105004392 A CN105004392 A CN 105004392A CN 201510500045 A CN201510500045 A CN 201510500045A CN 105004392 A CN105004392 A CN 105004392A
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- plate body
- orifice plate
- flowmeter
- beneficial
- pore plate
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Abstract
The invention discloses a flowmeter throttling part beneficial for measurement accuracy. The flowmeter throttling part comprises two pieces of oppositely arranged connecting flanges, an annular pore plate body arranged between the connecting flanges, and water penetrating holes formed between the outer edge of the pore plate body and a center hole, wherein the circular center hole is formed in the center of the pore plate body; the water penetrating holes penetrate through the two sides of the pore plate body; a locating hole is formed in the side face of the pore plate body; a positioning dowel matched with the locating hole is arranged on at least one of the connecting flanges. The flowmeter throttling part is used in the process of measuring the differential pressure flow of gaseous fluid from which liquid is easy to separate out, and the invention purposes that the enrichment of precipitated liquid at the front end of the pore plate body of the pipeline is avoided and the pore plate type flowmeter measurement accuracy is improved are achieved; and besides, the demand of mounting the center hole axis on a corresponding pipe section axis is easy to meet.
Description
Technical field
The present invention relates to fluid-transferring pipe piece apparatus field, particularly relate to a kind of flowmeter restriction being beneficial to measuring accuracy.
Background technology
Orifice flowmeter is the flow measurement device without scale, it and pneumatic, electric differential pressure transmitter or bi-bellow differential pressure transmitter support the use, usually by transmitter, this pressure reduction signal is converted to the output signal of ratio, again by secondary instrument or regulator, record is carried out to measured flow, instruction or adjustment.The principle of orifice flowmeter is for load onto the throttling element such as orifice plate or nozzle at pipe interior, and because the aperture of throttling element is less than internal diameter of the pipeline, when fluid flows through throttling element, the sudden contraction of flow velocity cross section, flow velocity is accelerated.The static pressure of throttling element rear end fluid reduces, so produce static pressure difference before and after throttling element, has the numerical relation determined between the fluid flow that this static pressure is crossed.Measure the differential pressure before and after throttling element with differential pressure transmitter, realize the measurement to flow.
The measuring accuracy of orifice flowmeter affects comparatively large by flow development length before mounting points position and afterwards, namely the length of above straight length directly affects homogeneity when fluid flows through throttling element on pipeline section.Because the center pit of throttling element is generally arranged on the central authorities of throttling element in prior art, like this, such as easily separating out in the use procedure of fluid line of liquid, lye is easily accumulated in the front end of throttling element, this there occurs change with regard to making the free air space passed through for medium in pipeline, so not only easily produce " breaking pipe " phenomenon (in pipeline, violent liquid knockout occurring when velocity of medium is larger), also make the measuring accuracy of orifice flowmeter greatly reduce simultaneously.
Summary of the invention
For above-mentioned by prior art because the center pit of throttling element is generally arranged on the central authorities of throttling element, like this, such as easily separating out in the use procedure of fluid line of liquid, lye is easily accumulated in the front end of throttling element, this there occurs change with regard to making the free air space passed through for medium in pipeline, so not only easily produce " breaking pipe " phenomenon, the problem simultaneously also making the measuring accuracy of orifice flowmeter greatly reduce, the invention provides a kind of flowmeter restriction being beneficial to measuring accuracy.
For the problems referred to above, a kind of flowmeter restriction being beneficial to measuring accuracy provided by the invention reaches goal of the invention by following technical essential: a kind of flowmeter restriction being beneficial to measuring accuracy, comprise two panels in the joint flange be oppositely arranged with to be arranged between joint flange and orifice plate body in the form of a ring, the central authorities of described orifice plate body are also provided with circular center pit, also comprise the permeable hole be arranged between this outer rim of orifice plate and center pit, the both sides of the through orifice plate body of described permeable hole, the side of described orifice plate body is also provided with pilot hole, has a tommy joint flange being provided with and coordinating with described pilot hole at least.
Concrete, this orifice plate body is connected to pipeline for clip type, namely be clamped between two panels joint flange, joint flange and orifice plate body arrange the configuration settings of tommy and pilot hole respectively, be convenient to draw over to one's side in the process of the joint flange be oppositely arranged at employing bolt, by coordinating of pilot hole and tommy, realize the determination of orifice plate body and joint flange relative position, be beneficial to the concentricity ensureing orifice plate body and joint flange, the center pit of setting is the free air space that medium passes this orifice plate body.Orifice plate body arranges the vibrational power flow of permeable hole, the present invention can be realized for easily separating out in the gaseous fluid differential pressure flow metering process of liquid, the precipitation liquid being enriched in orifice plate body front end can be flow to the rear end of orifice plate body under differential pressure by permeable hole, like this, enrichment can be effectively avoided to separate out the cross sectional shape of liquid and alter flow line or reduce this variable of above cross sectional shape, before being beneficial to orifice plate body, rear fluid in flow process each point flow velocity relative to the symmetry of aperture plate center line, reach the goal of the invention of orifice plate body front position enrichment lye and the raising orifice-plate flowmeter measuring accuracy avoided at pipeline.Concrete, after preferably above-mentioned permeable hole being arranged on the installation of orifice plate body, permeable hole is tangent or crossing with the internal face bottom of pipeline.
Further technical scheme is:
For the benefit of gaseous fluid on pipeline section each point flow velocity relative to the symmetry of orifice plate body central line, be beneficial to the accuracy of orifice flowmeter metering, more than one of described permeable hole, and permeable hole is uniform in the form of a ring relative to the center line of orifice plate body on orifice plate body.
Static seal effect for the benefit of between orifice plate body and corresponding joint flange, the both sides of described orifice plate body are provided with annular tongue-and-groove.
For weakening when containing impurity in gaseous fluid, the impact of impurity and orifice plate body phase mutual friction centering central hole and permeable hole shape, be beneficial to the measuring accuracy of orifice flowmeter, described center pit and permeable hole are circular isometrical hole.
As for weakening when containing impurity in gaseous fluid, another scheme of the impact of impurity and orifice plate body phase mutual friction centering central hole and permeable hole shape, the initiating terminal of described center pit and permeable hole and end are provided with circular arc chamfering.
For ease of coordinating of pilot hole in orifice plate body installation process and tommy, the free end of described tommy is also provided with tapered guiding top, simultaneously, as a kind of version that there are two reference point and accurately locate to realize orifice plate body and joint flange, tommy and pilot hole are two, and arrange in groups one by one.Wherein, finger tommy is set one by one in groups and a pilot hole forms an anchor point.
The present invention has following beneficial effect:
1, structure of the present invention is simple, orifice plate body arranges the vibrational power flow of permeable hole, the present invention can be realized for easily separating out in the gaseous fluid differential pressure flow metering process of liquid, the precipitation liquid being enriched in orifice plate body front end can be flow to the rear end of orifice plate body under differential pressure by permeable hole, like this, enrichment can be effectively avoided to separate out the cross sectional shape of liquid and alter flow line or reduce this variable of above cross sectional shape, before being beneficial to orifice plate body, rear fluid in flow process each point flow velocity relative to the symmetry of aperture plate center line, reach the goal of the invention of orifice plate body front position enrichment lye and the raising orifice-plate flowmeter measuring accuracy avoided at pipeline.
2, the pilot hole arranged and tommy, for realizing when orifice plate body is installed between joint flange orifice plate body relative to the uniqueness of joint flange position, to reach the object ensureing center pit present position in the duct, be also conducive to the measuring accuracy of orifice-plate flowmeter.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation being beneficial to a flowmeter restriction specific embodiment of measuring accuracy of the present invention.
Label shown in accompanying drawing is respectively: 1, orifice plate body, and 2, center pit, 3, annular tongue-and-groove, 4, permeable hole, 5, tommy, 6, pilot hole, 7, joint flange.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
As shown in Figure 1, a kind of flowmeter restriction being beneficial to measuring accuracy, comprise two panels in the joint flange 7 be oppositely arranged with to be arranged between joint flange 7 and orifice plate body 1 in the form of a ring, the central authorities of described orifice plate body 1 are also provided with circular center pit 2, also comprise the permeable hole 4 be arranged between orifice plate body 1 outward flange and center pit 2, the both sides of the through orifice plate body 1 of described permeable hole 4, the side of described orifice plate body 1 is also provided with pilot hole 6, has the tommy 5 joint flange 7 being provided with and coordinating with described pilot hole 6 at least.
In the present embodiment, this orifice plate body 1 is connected to pipeline for clip type, namely be clamped between two panels joint flange 7, joint flange 7 with orifice plate body 1 arrange the configuration settings of tommy 5 and pilot hole 6 respectively, be convenient to draw over to one's side in the process of the joint flange 7 be oppositely arranged at employing bolt, by coordinating of pilot hole 6 and tommy 5, realize the determination of orifice plate body 1 and joint flange 7 relative position, be beneficial to the concentricity ensureing orifice plate body 1 and joint flange 7, the center pit 2 of setting is for medium is through the free air space of this orifice plate body 1.Orifice plate body 1 arranges the vibrational power flow of permeable hole 4, the present invention can be realized for easily separating out in the gaseous fluid differential pressure flow metering process of liquid, the precipitation liquid being enriched in orifice plate body 1 front end can be flow to the rear end of orifice plate body 1 under differential pressure by permeable hole 4, like this, enrichment can be effectively avoided to separate out the cross sectional shape of liquid and alter flow line or reduce this variable of above cross sectional shape, before being beneficial to orifice plate body 1, rear fluid in flow process each point flow velocity relative to the symmetry of aperture plate center line, reach the goal of the invention of orifice plate body 1 front position enrichment lye and the raising orifice-plate flowmeter measuring accuracy avoided at pipeline.In the present embodiment, be preferably arranged on by above-mentioned permeable hole 4 after orifice plate body 1 installs, permeable hole 4 is tangent or crossing with the internal face bottom of pipeline.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, as shown in Figure 1, for the benefit of gaseous fluid on pipeline section each point flow velocity relative to the symmetry of orifice plate body 1 center line, be beneficial to the accuracy of orifice flowmeter metering, more than one of described permeable hole 4, and permeable hole 4 is uniform in the form of a ring relative to the center line of orifice plate body 1 on orifice plate body 1.
Static seal effect for the benefit of between orifice plate body 1 and corresponding joint flange, the both sides of described orifice plate body 1 are provided with annular tongue-and-groove 3.
For weakening when containing impurity in gaseous fluid, the impact of impurity and orifice plate body 1 phase mutual friction centering central hole 2 and permeable hole 4 shape, be beneficial to the measuring accuracy of orifice flowmeter, described center pit 2 and permeable hole 4 are circular isometrical hole.
As for weakening when containing impurity in gaseous fluid, another scheme of the impact of impurity and orifice plate body 1 phase mutual friction centering central hole 2 and permeable hole 4 shape, initiating terminal and the end of described center pit 2 and permeable hole 4 are provided with circular arc chamfering.
Embodiment 3:
The present embodiment is further qualified on the basis of any one technical scheme disclosed in any one embodiment above, as shown in Figure 1, for ease of coordinating of pilot hole 6 in orifice plate body 1 installation process and tommy 5, the free end of described tommy 5 is also provided with tapered guiding top, simultaneously, as a kind of version having two reference point and accurately locate with joint flange 7 to realize orifice plate body 1, tommy 5 and pilot hole 6 are two, and arrange in groups one by one.Wherein, finger tommy 5 is set one by one in groups and a pilot hole 6 forms an anchor point.
Above content is the further description done the present invention in conjunction with concrete preferred implementation, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments drawn under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (6)
1. one kind is beneficial to the flowmeter restriction of measuring accuracy, comprise two panels in the joint flange be oppositely arranged (7) with to be arranged between joint flange (7) and orifice plate body (1) in the form of a ring, the central authorities of described orifice plate body (1) are also provided with circular center pit (2), it is characterized in that, also comprise the permeable hole (4) be arranged between orifice plate body (1) outward flange and center pit (2), the both sides of the through orifice plate body (1) of described permeable hole (4), the side of described orifice plate body (1) is also provided with pilot hole (6), has the tommy (5) joint flange (7) being provided with and coordinating with described pilot hole (6) at least.
2. a kind of flowmeter restriction being beneficial to measuring accuracy according to claim 1, is characterized in that, more than one of described permeable hole (4), and permeable hole (4) is uniform in the form of a ring relative to the center line of orifice plate body (1) on orifice plate body (1).
3. a kind of flowmeter restriction being beneficial to measuring accuracy according to claim 1, is characterized in that, the both sides of described orifice plate body (1) are provided with annular tongue-and-groove (3).
4. a kind of flowmeter restriction being beneficial to measuring accuracy according to claim 1, is characterized in that, described center pit (2) and permeable hole (4) are circular isometrical hole.
5. a kind of flowmeter restriction being beneficial to measuring accuracy according to claim 1, is characterized in that, initiating terminal and the end of described center pit (2) and permeable hole (4) are provided with circular arc chamfering.
6. a kind of flowmeter restriction being beneficial to measuring accuracy as claimed in any of claims 1 to 5, it is characterized in that, the free end of described tommy (5) is also provided with tapered guiding top, and tommy (5) and pilot hole (6) are two, and arrange in groups one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500045.XA CN105004392A (en) | 2015-08-17 | 2015-08-17 | Flowmeter throttling part beneficial for measurement accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500045.XA CN105004392A (en) | 2015-08-17 | 2015-08-17 | Flowmeter throttling part beneficial for measurement accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105004392A true CN105004392A (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510500045.XA Pending CN105004392A (en) | 2015-08-17 | 2015-08-17 | Flowmeter throttling part beneficial for measurement accuracy |
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| CN (1) | CN105004392A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7051765B1 (en) * | 2003-12-19 | 2006-05-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Balanced orifice plate |
| CN201034649Y (en) * | 2007-04-20 | 2008-03-12 | 项家从 | Semi-ring voltage equalizing type flange pressure sampling stephanoporate hole plate flow rate sensor |
| CN201707077U (en) * | 2010-05-21 | 2011-01-12 | 上海华强浮罗仪表有限公司 | Balance flow meter |
| CN102435236A (en) * | 2011-11-04 | 2012-05-02 | 南通醋酸纤维有限公司 | Flow meter of perforated plate |
| CN103033222A (en) * | 2011-09-30 | 2013-04-10 | 上海安锐自动化仪表有限公司 | Super-minor-caliber three-diamond-type flowmeter |
-
2015
- 2015-08-17 CN CN201510500045.XA patent/CN105004392A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7051765B1 (en) * | 2003-12-19 | 2006-05-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Balanced orifice plate |
| CN201034649Y (en) * | 2007-04-20 | 2008-03-12 | 项家从 | Semi-ring voltage equalizing type flange pressure sampling stephanoporate hole plate flow rate sensor |
| CN201707077U (en) * | 2010-05-21 | 2011-01-12 | 上海华强浮罗仪表有限公司 | Balance flow meter |
| CN103033222A (en) * | 2011-09-30 | 2013-04-10 | 上海安锐自动化仪表有限公司 | Super-minor-caliber three-diamond-type flowmeter |
| CN102435236A (en) * | 2011-11-04 | 2012-05-02 | 南通醋酸纤维有限公司 | Flow meter of perforated plate |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20151028 |