CN208872361U - A kind of flow passage structure improving Electromagnetic Flow performance - Google Patents
A kind of flow passage structure improving Electromagnetic Flow performance Download PDFInfo
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- CN208872361U CN208872361U CN201820853321.XU CN201820853321U CN208872361U CN 208872361 U CN208872361 U CN 208872361U CN 201820853321 U CN201820853321 U CN 201820853321U CN 208872361 U CN208872361 U CN 208872361U
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- retraction
- retraction section
- circular port
- rectangular opening
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Abstract
The utility model provides a kind of flow passage structure for improving Electromagnetic Flow performance, it include: the first retraction section, measuring section and the second retraction section, first retraction section and the second retraction one end of section far from measuring section are circular port, first retraction section and the second retraction section close to one end of measuring section are rectangular opening, direction where defining the both sides straight line of the rectangular opening is respectively first direction and second direction, the rectilinear direction of plane is third direction where the vertical rectangular opening of definition, it is being parallel to third direction and is passing through in the plane of two opposite side midpoint lines of rectangular opening, the shape of first retraction section and the second retraction section is Wei Xinsi base curves, by carrying out retraction design to runner both ends (the first retraction section and the second retraction section), measuring section uses rectangular-section pipeline, the stable flow field of high speed and more reasonable magnetic can be obtained Field distribution can effectively improve the measurement sensitivity of electromagnetic flowmeter, and then improve the range ratio and measurement accuracy of electromagnetic flowmeter.
Description
Technical field
The utility model relates to automation instrumentations, more particularly to a kind of runner knot for improving Electromagnetic Flow performance
Structure.
Background technique
With the high speed development of science and technology and being constantly progressive for measurement technology, electromagnetism water meter obtains in urban water supply metering
To being more and more widely used.Compared with tradition machinery water meter, electromagnetism water meter has broader measurement range, does not move or convex
Part is played, parasitic pressure drop will not be generated, and is had the advantages that stable without abrasion, corrosion-resistant, accurate measurement and performance while electric
Magnetic water meter can in-line power, avoid accidental power failure from causing measurement error.
The sensor of electromagnetism water meter directly affects its measurement performance, and the collected induced electromotive force of the electrode of sensor is got over
By force, the sensitivity of electromagnetism water meter is higher.At present in most of electromagnetism water meter product, the runner of sensor is common round tube, is surveyed
The sensitivity and common round tube for measuring water flow do not have positive connection, in order to improve the measurement sensitivity of sensor, need to sensor
Structure improve to improve the collected Electromagnetic Flow of electrode.
Utility model content
In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide a kind of raising Electromagnetic Flows
The flow passage structure of energy, for solving, round tube runner Electromagnetic Flow signal in the prior art is weaker and signal stabilization is poor is asked
Topic, improves the Electromagnetic Flow performance of runner.
In order to achieve the above objects and other related objects, the utility model provides a kind of runner for improving Electromagnetic Flow performance
Structure, comprising: for increasing the first retraction section, measuring section for acquiring signal of flow velocity and for reducing the pressure loss
Second retraction section, the first retraction section and the second retraction one end of section far from measuring section are circular port, the first retraction section and second
It is rectangular opening that section, which is retracted, close to one end of measuring section, and the direction where defining the both sides straight line of the rectangular opening is respectively first
Direction and second direction, the rectilinear direction of plane is third direction where the vertical rectangular opening of definition, is being parallel to third party
To and by two opposite side midpoint lines of rectangular opening plane on, first retraction section and second retraction section shape be tie up it is pungent
This base curves.
Optionally, in the first retraction section and the second retraction section, the plane where circular port is bent along the Wei Xinsiji
Plane where line setting-out to rectangular opening, and form retraction curved surface.
Optionally, it is being parallel to third direction and is passing through in the plane of two opposite side midpoint lines of rectangular opening, first
The shape for being retracted section and the second retraction section is Yi Wei Xinsi base curves:
Wherein, the radius of the circular port is Hi, the half of distance is H between described two opposite side0, first retraction section or
It is L that person second, which is retracted length of the section on third direction, plane where the point and the circular port on Yi Wei Xinsi base curves
Distance be x, the point on Yi Wei Xinsi base curves is H at a distance from the axis of circular port.
Optionally, it is being parallel to third direction and is passing through in the plane of two opposite side midpoint lines of rectangular opening, first
The shape for being retracted section and the second retraction section is secondary Wei Xinsi base curves:
Wherein, the radius of the circular port is Hi, the half of distance is H between described two opposite side0, first retraction section or
It is L that person second, which is retracted length of the section on third direction, plane where the point and the circular port on secondary Wei Xinsi base curves
Distance be x, the point on secondary Wei Xinsi base curves is H at a distance from the axis of circular port.
Optionally, the area ratio of the area of the circular port and the rectangular opening is 1.5 to 6.
Optionally, the rectangular opening has rounded structure.
Optionally, the first retraction section includes the first retraction section lining, and the measuring section includes measuring section lining, described
Second retraction section includes the second retraction section lining, and the first retraction section lining, measuring section lining and the second retraction section lining are by rubber
Glue is made.
Optionally, the first retraction section lining and second is retracted section lining at circular port along the side far from circular port circumference
To extension.
Optionally, the measuring section is equipped with the electrode for measuring flow.
As described above, the flow passage structure of the raising Electromagnetic Flow performance of the utility model, has the advantages that
1, by carrying out retraction design to runner both ends (the first retraction section and the second retraction section), measuring section is cut using rectangle
Facial canal road can obtain the stable flow field of high speed and more reasonable Distribution of Magnetic Field, can effectively improve the survey of electromagnetic flowmeter
Sensitivity is measured, and then improves the range ratio and measurement accuracy of electromagnetic flowmeter；
2, due to improving Electromagnetic Flow performance, electrode and biosensor power consumption are reduced, and extend electromagnetic flowmeter
Maintenance period and reduce battery consumption.
Detailed description of the invention
Fig. 1 is shown as the flow passage structure schematic diagram of the raising Electromagnetic Flow performance of the utility model embodiment.
Fig. 2 is shown as the flow passage structure sectional structure of the raising Electromagnetic Flow performance of the utility model embodiment.
Fig. 3 is shown as circular port and rectangular opening schematic diagram in the first retraction section.
Fig. 4 is shown as the first retraction section lining, measuring section lining and the second retraction section lining structure schematic diagram.
Piece mark explanation
1 first retraction section
11 circular ports
12 rectangular openings
13 first retraction section linings
2 measuring sections
21 measuring section linings
3 second retraction sections
31 second retraction section linings
4 retraction curved surfaces
5 electrodes
61 first directions
62 second directions
63 third directions
Specific embodiment
Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition
Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer
With carrying out various modifications or alterations under the spirit without departing from the utility model.
It please refers to Fig.1 to Fig.4.It should be noted that diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of utility model is only shown with related component in the utility model rather than when according to actual implementation in schema then
Component count, shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind
Become, and its assembly layout kenel may also be increasingly complex.This specification structure depicted in this specification institute accompanying drawings, ratio, size etc.,
Only to cooperate the revealed content of specification, so that those skilled in the art understands and reads, it is not limited to this reality
With novel enforceable qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or
The adjustment of size should all still fall in this reality in the case where not influencing the effect of the utility model can be generated and the purpose that can reach
It is obtained with novel revealed technology contents in the range of capable of covering.Meanwhile in this specification it is cited as "upper", "lower",
The term of "left", "right", " centre " and " one " etc. is merely convenient to being illustrated for narration, rather than can to limit the utility model
The range of implementation, relativeness are altered or modified, under the content of no substantial changes in technology, can when being also considered as the utility model
The scope of implementation.
Inventor has found that the runner of existing electromagnetic flowmeter generally uses round tube to design, due to circular pipe type electromagnetic flowmeter
Performance depend primarily on the performance of coil, measure the sensitivity of water flow and the shape of round tube and size without direct relation, make
It is not strong at measuring signal and signal stabilization is poor, and then the raising of Electromagnetic Flow performance is constrained, it inventors herein proposes thus
It is designed in the input terminal and output end of electromagnetic flowmeter runner using the structure of retraction, had both improved water flow in the stream of input terminal
Speed increases the induced electromotive force of electromagnetic flowmeter electrode, improves measurement sensitivity, and the pressure loss；In electromagnetic flowmeter
Measuring section is designed using rectangular configuration, and more conducively the reasonable layout of the installation of coil and magnetic field, the magnetic field for enhancing measuring section are strong
In the case that degree, improves sensor of water meter sensitivity, and measuring signal sensitivity is certain, the function of electromagnetic flowmeter is reduced
Consumption.
The utility model provides a kind of flow passage structure for improving Electromagnetic Flow performance referring to FIG. 1 to FIG. 4, comprising: is used for
Increase the first retraction section 1, the measuring section 2 for acquiring signal and the second retraction section 3 for reducing the pressure loss of flow velocity,
First retraction section 1 and the second retraction one end of section 3 far from measuring section 2 are circular port 11, the first retraction section 1 and the second retraction section
3 close to one end of measuring section 2 be rectangular opening 12, and the direction where defining the both sides straight line of the rectangular opening 12 is respectively first
Direction 61 and second direction 62, the rectilinear direction for defining the vertical 12 place plane of rectangular opening is third direction 63, parallel
In third direction 63 and pass through in the plane of 12 two opposite side midpoint lines of rectangular opening, the first retraction section 1 and the second retraction
The shape of section 3 is Wei Xinsi base curves.
For the design requirement of water meter retraction section, retraction is structurally reasonable, and it is excessive so that water meter entirety crushing mistake to be unable to crushing
Greatly, to make magnetic field part concentrate on measuring section as far as possible, retraction segment length is unsuitable too long, when meeting crushing, designs larger
Retraction ratio, to increase the flow velocity of measuring section；It is uniform, straight and stable that the outlet of retraction section should meet flow rate of water flow.
The performance of water meter retraction section depends mainly on two factors.One is retraction ratio, i.e., the area of the described circular port 11
With the area ratio of the rectangular opening 12；Second is retraction curve.
The retraction of section is retracted than size, main and water flow uniformity, turbulivity and runner crushing for water meter runner
Size is related.The retraction ratio for improving runner retraction section, uniformity and reduction water flow turbulivity to water flow are good, former
Because being, during retraction, water flow time averaged velocity increases with area ratio, and fluctuation velocity is basically unchanged, therefore water
The turbulivity of stream just reduces, and signal is more reliable when water meter measures, and water flow time averaged velocity increases, the induction of sensor electrode
Electromotive force is bigger, and water meter sensitivity is higher, measures more accurate；But excessive retraction ratio can be such that water meter crushing increases, so right
The retraction of runner retraction section than be it is conditional, according to the area of the area and the rectangular opening 12 of testing the circular port 11 it
It is ideal than being 1.5 to 6.
Retraction curve shape be affected to the uniformity of measuring section water flow, if retraction Curve Design is improper must not
To uniform water flow, for being retracted curve, inlet curve should keep continuous with external pipe, and exit curve should gently tend to
In measuring section size, while water flow is continuously increased monotonically along retraction curve speed.
In order to meet magnetic field maximum, in the case where water meter loop construction designs reasonable situation, from magnetic circuit second equation:
NiIiFor the magnetomotive force that coil current generates, HiLiFor the magnetic potential difference of magnetic circuit.
In the case where from magnetic circuit second equation it was determined that ignoring leakage field, the distance between coil is smaller, and magnetic field is stronger,
It and is approximately linear relationship.
Therefore distance is the smaller the better between coil, due to the installation to meet coil, the distance between electrode cannot be too small, right
For round tube, the distance between the distance between coil and electrode are equal to radius, it is clear that in order to increase the magnetic field of measuring section
Intensity, the runner design of circular tube structure are not suitable for measuring section, still choose the shape tube runner design of rectangular section,
Further, rectangular opening 12 has rounded structure, prevents turbulent flow.
Specifically, the plane where circular port 11 is along the Wei Xinsi in the first retraction section 1 and the second retraction section 3
Plane where base curves setting-out to rectangular opening 12, and retraction curved surface 4 is formed, practical function can be used three-dimensional software and be built
The step of mould, modeling is as follows: modeling forms rectangular opening 12 in present three-dimensional software, is being parallel to described in third direction 63 and process
Extend Wei Xinsi base curves in the plane of 12 two opposite side midpoint lines of rectangular opening, then modeling forms circular port 11, passes through
The Wei Xinsi base curves guidance carries out setting-out and forms retraction curved surface 4, and the curved surface of formation is carried out mold processing and injection molding,
And in post-production at required runner.
Further, in the plane for being parallel to third direction 63 and process 12 two opposite side midpoint lines of rectangular opening
On, the shape of the first retraction section 1 and the second retraction section 3 is Yi Wei Xinsi base curves:
Wherein, the radius of the circular port 11 is Hi, the half of distance is H between described two opposite side0, the first retraction section 1
Or second length of the retraction section 3 on third direction 63 be L, point and the circular port 11 on Yi Wei Xinsi base curves
The distance of place plane is x, and the point on Yi Wei Xinsi base curves is H at a distance from the axis of circular port 11.
Further, in the plane for being parallel to third direction 63 and process 12 two opposite side midpoint lines of rectangular opening
On, the shape of the first retraction section 1 and the second retraction section 3 is secondary Wei Xinsi base curves:
Wherein, the radius of the circular port 11 is Hi, the half of distance is H between described two opposite side0, the first retraction section 1
Or second length of the retraction section 3 on third direction 63 be L, point and the circular port 11 on secondary Wei Xinsi base curves
The distance of place plane is x, and the point on secondary Wei Xinsi base curves is H at a distance from the axis of circular port 11.
Specifically, being parallel to third direction 63 and passing through in the plane of 12 two opposite side midpoint lines of rectangular opening,
The shape of first retraction section 1 and/or the second retraction section 3 is Yi Wei Xinsi base curves and/or secondary Wei Xinsi base curves；It can root
According to actual demand, when needing to be made bi-directional electromagnetic flowmeter, i.e., the first retraction section 1 and the second retraction section 3 can do flow
Input terminal and flow output end, the first retraction section 1 and the second retraction section 3 use identical Curve Design, and then can be used primary
Wei Xinsi base curves or secondary Wei Xinsi base curves；When needing that unidirectional electromagnetic flowmeter is made, i.e., the first retraction section 1 does flow
When input terminal, the first retraction section 1 uses secondary Wei Xinsi base curves, and the second retraction section 3 uses Yi Wei Xinsi base curves or two
Secondary Wei Xinsi base curves can change the size of the first retraction section 1 and the second retraction section 3 according to actual flow pressure demand.
Preferably, the first retraction section 1 includes the first retraction section lining 13, and the measuring section 2 includes measuring section lining
21, the second retraction section 3 includes the second retraction section lining 31, the first retraction section lining 13, measuring section lining 21 and the second contracting
It is made of rubber into section lining 31, is specifically PU, prevents the erosion of fluid；First retraction section lining 13 and the second retraction section
Lining 31 extends at circular port 11 along the direction far from 11 circumference of circular port, convenient for being assemblied in electromagnetic flowmeter；It is described
Measuring section 2 is equipped with the electrode 5 for measuring flow, and electrode 5 is through measuring section lining 21 and is exposed inside measuring section 2, can
Collect stronger induced electromotive force.
The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.
Claims (9)
1. a kind of flow passage structure for improving Electromagnetic Flow performance characterized by comprising for increasing the first retraction of flow velocity
Section, the measuring section for acquiring signal and the second retraction section for reducing the pressure loss, the first retraction section and the second retraction
The one end of section far from measuring section is circular port, and it is rectangle that the first retraction section and second, which are retracted section close to one end of measuring section,
Mouthful, the direction where defining the both sides straight line of the rectangular opening is respectively first direction and second direction, defines the vertical square
The rectilinear direction of plane where shape mouth is third direction, is being parallel to third direction and is passing through described two opposite side midpoints of rectangular opening
In the plane of line, the shape of the first retraction section and the second retraction section is Wei Xinsi base curves.
2. it is according to claim 1 improve Electromagnetic Flow performance flow passage structure, it is characterised in that: first retraction section and
In second retraction section, plane where circular port is along the plane where the Wei Xinsi base curves setting-out to rectangular opening, and shape
At retraction curved surface.
3. the flow passage structure according to claim 1 for improving Electromagnetic Flow performance, it is characterised in that: be parallel to third party
To and by two opposite side midpoint lines of rectangular opening plane on, first retraction section and second retraction section shape be primary
Wei Xinsi base curves:
Wherein, the radius of the circular port is Hi, the half of distance is H between described two opposite side0, the first retraction section or the
Two length of the retraction sections on third direction are L, plane where the point and the circular port on Yi Wei Xinsi base curves away from
From for x, the point on Yi Wei Xinsi base curves is H at a distance from the axis of circular port.
4. the flow passage structure according to claim 1 for improving Electromagnetic Flow performance, it is characterised in that: be parallel to third party
To and by two opposite side midpoint lines of rectangular opening plane on, first retraction section and second retraction section shape be it is secondary
Wei Xinsi base curves:
Wherein, the radius of the circular port is Hi, the half of distance is H between described two opposite side0, the first retraction section or the
Two length of the retraction sections on third direction are L, plane where the point and the circular port on secondary Wei Xinsi base curves away from
From for x, the point on secondary Wei Xinsi base curves is H at a distance from the axis of circular port.
5. the flow passage structure according to claim 1 for improving Electromagnetic Flow performance, it is characterised in that: the face of the circular port
The long-pending area ratio with the rectangular opening is 1.5 to 6.
6. the flow passage structure according to claim 1 for improving Electromagnetic Flow performance, it is characterised in that: the rectangular opening has
Rounded structure.
7. the flow passage structure according to claim 1 for improving Electromagnetic Flow performance, it is characterised in that: the first retraction section
Including the first retraction section lining, the measuring section includes measuring section lining, and the second retraction section includes the second retraction section lining,
First retraction section lining, measuring section lining and the second retraction section lining are made of rubber.
8. the flow passage structure according to claim 7 for improving Electromagnetic Flow performance, it is characterised in that: the first retraction section lining
Extend at circular port along the direction far from circular port circumference with the second retraction section lining.
9. the flow passage structure according to claim 1 for improving Electromagnetic Flow performance, it is characterised in that: the measuring section is equipped with
Electrode for measuring flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820853321.XU CN208872361U (en) | 2018-06-01 | 2018-06-01 | A kind of flow passage structure improving Electromagnetic Flow performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820853321.XU CN208872361U (en) | 2018-06-01 | 2018-06-01 | A kind of flow passage structure improving Electromagnetic Flow performance |
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| Publication Number | Publication Date |
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| CN208872361U true CN208872361U (en) | 2019-05-17 |
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| CN201820853321.XU Active CN208872361U (en) | 2018-06-01 | 2018-06-01 | A kind of flow passage structure improving Electromagnetic Flow performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801374A (en) * | 2018-06-01 | 2018-11-13 | 重庆川仪自动化股份有限公司 | A kind of flow passage structure improving Electromagnetic Flow performance |
| CN112504365A (en) * | 2020-11-25 | 2021-03-16 | 合肥工业大学 | Magnetic circuit structure optimization design method of electromagnetic flow sensor |
-
2018
- 2018-06-01 CN CN201820853321.XU patent/CN208872361U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801374A (en) * | 2018-06-01 | 2018-11-13 | 重庆川仪自动化股份有限公司 | A kind of flow passage structure improving Electromagnetic Flow performance |
| CN112504365A (en) * | 2020-11-25 | 2021-03-16 | 合肥工业大学 | Magnetic circuit structure optimization design method of electromagnetic flow sensor |
| CN112504365B (en) * | 2020-11-25 | 2022-05-20 | 合肥工业大学 | Magnetic circuit structure optimization design method of electromagnetic flow sensor |
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