CN117889942A - Flowmeter calibrating device - Google Patents
Flowmeter calibrating device Download PDFInfo
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- CN117889942A CN117889942A CN202410078538.8A CN202410078538A CN117889942A CN 117889942 A CN117889942 A CN 117889942A CN 202410078538 A CN202410078538 A CN 202410078538A CN 117889942 A CN117889942 A CN 117889942A
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- pipe body
- detection
- flow meter
- calibration set
- circulation channel
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- 238000001514 detection method Methods 0.000 claims abstract description 51
- 230000000712 assembly Effects 0.000 claims abstract description 25
- 238000000429 assembly Methods 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The invention provides a flowmeter calibrating device, and belongs to the technical field of calibrating equipment. Comprises a pipe body, wherein a hollow circulation channel extending along the length direction of the pipe body is arranged in the pipe body; the turbulent flow generating body is arranged in the pipe body and partially blocks the flow passage; the detection assembly is two, and the two detection assemblies are arranged at intervals along the extending direction of the fluid channel. In the invention, a vortex is generated after a medium in the tube body flows through the turbulence generating body, and after the vortex passes through the attachment point, magnetic force lines of the detection assembly are cut when the vortex sequentially passes through the two detection assemblies, and an alternating current fluctuation signal is generated between the two electrodes of the detection assemblies. The time interval between the wave signals of the two detection assemblies is the transmission time of the vortex in the pipe body. Under the condition that the geometric position between the two detection assemblies is fixed, the transmission time is obtained through measurement, and the average flow velocity and the volume flow in the pipe body can be calculated, so that the electromagnetic flowmeter arranged on the pipe body is calibrated.
Description
Technical Field
The invention relates to the field of calibration equipment, in particular to a flowmeter calibration device.
Background
An electromagnetic flowmeter is a meter for measuring the volume flow of a conductive liquid based on the law of electromagnetic induction. The ratio of maximum flow to minimum flow can typically be up to 20:1, the applicable pipe diameter can reach 3m, has the advantages of large applicable pipe diameter range, linear output signal and measured flow, high accuracy and the like, and can be used for measuring the flow of fluid with the conductivity of more than or equal to 5 mu s/cm, such as acid solution, alkali solution, salt solution, sewage, slurry, ore pulp, paper pulp and the like. The flow rate measured by the electromagnetic flowmeter is related to the electromotive force generated by the flow of the liquid, and the electromotive force is determined by factors such as the magnetic field intensity, the flow rate of the liquid, the flow area and the like. Because the magnetic field intensity is generally changed greatly and is difficult to measure, the electromagnetic flowmeter is required to be calibrated in order to improve the precision of the electromagnetic flowmeter.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a flowmeter calibration device for solving the problem that the electromagnetic flowmeter in the prior art is difficult to calibrate.
To achieve the above and other related objects, the present invention provides a flow meter calibration device comprising:
The pipe body is internally provided with a hollow circulation channel extending along the length direction of the pipe body;
The turbulence generating body is arranged in the pipe body and partially blocks the circulation channel;
The two detection assemblies are arranged at intervals along the extending direction of the fluid channel;
The detection assembly comprises two magnets and two electrodes, wherein the two magnets are oppositely arranged on two sides of the circulation channel, the two magnets are mutually close to each other and are different in name between magnetic poles, the electrodes extend into the circulation channel, the two electrodes of the detection assembly are sequentially arranged along the extending direction of the fluid channel and are respectively positioned on two sides of a connecting line between the two magnets of the detection assembly, and the two electrodes are symmetrical about the connecting line between the two magnets.
Optionally, the turbulence generating body protrudes in the circulation channel along the radial direction of the pipe body, the protruding height of the turbulence generating body is h, and the inner diameter dimension of the circulation channel is D, wherein h is more than or equal to 0.3D and less than or equal to 0.4D.
Alternatively, h=d/3.
Optionally, the turbulence generating body is semicircular, and the arc surface of the turbulence generating body is attached to the inner wall of the pipe body.
Optionally, a device mounting position to be calibrated is arranged between the two detection assemblies.
Optionally, the distance between the two detection components is L, and the inner diameter dimension of the flow channel is D, wherein L is more than or equal to 1.5D and less than or equal to 6D.
Alternatively, l=5d.
Optionally, the turbulence generating body is made of stainless steel.
Optionally, the turbulence generating body has a thickness of 4mm.
Optionally, the mounting distance between the electrode of the detection assembly and the magnet in the detection assembly in the extending direction of the fluid channel is W, w=7.5 mm.
Optionally, a line between two magnets of the detection assembly is perpendicular to an extending direction of the fluid channel.
As described above, the flowmeter calibration device of the present invention has the following beneficial effects: the medium in the tube body flows through the turbulence generating body to generate a vortex, and after the vortex passes through the attachment point, the vortex sequentially passes through the two detection components to cut magnetic force lines of the detection components, so that an alternating current fluctuation signal is generated between the two electrodes of the detection components. The time interval between the wave signals of the two detection assemblies is the transmission time of the vortex in the pipe body. Under the condition that the geometric position between the two detection assemblies is fixed, the transmission time is obtained through measurement, and the average flow velocity and the volume flow in the pipe body can be calculated, so that the electromagnetic flowmeter arranged on the pipe body is calibrated.
Drawings
FIG. 1 is a schematic cross-sectional view of a flowmeter calibration device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a layout structure of a magnet according to an embodiment of the invention;
FIG. 3 is a schematic diagram showing a layout structure of a magnet according to an embodiment of the invention;
FIG. 4 is a schematic perspective view of a flowmeter calibration device according to an embodiment of the invention;
Fig. 5 is an enlarged view showing a partial structure of an electrode and a magnet mounting portion in an embodiment of the present invention.
Reference numerals illustrate: the device comprises a pipe body 1, a turbulence generating body 2, a magnet 3, an electrode 4, a device mounting position 5 to be calibrated, a detection assembly 10 and a flowmeter 20 to be calibrated.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Referring to fig. 1 to 5, the present embodiment provides a flow meter calibration device, which includes a tube 1, a turbulence generating body 2 and a detecting component 10. The pipe body 1 is internally provided with a hollow circulation channel extending along the length direction of the pipe body 1. The turbulence generating body 2 is arranged in the pipe body 1 and partially blocks the circulation channel. The number of the detection assemblies 10 is two, and the two detection assemblies 10 are arranged at intervals along the extending direction of the fluid channel.
The detecting assembly 10 includes two magnets 3 and two electrodes 4, the two magnets 3 are oppositely disposed at two sides of the circulation channel, and the two magnets 3 are mutually close to each other, the electrodes 4 extend into the circulation channel, the two electrodes 4 of the detecting assembly 10 are sequentially disposed along the extending direction of the fluid channel and are respectively disposed at two sides of a connecting line between the two magnets 3 of the detecting assembly 10, and the two electrodes 4 are symmetrical with respect to the connecting line between the two magnets 3. The magnet 3 may be a permanent magnet 3 or an electromagnet 3.
The medium in the pipe body 1 flows through the turbulence generating body 2 to generate a vortex, and after the vortex passes through the attachment point, the vortex cuts magnetic force lines of the detection assembly 10 when sequentially passing through the two detection assemblies 10, so that an alternating current fluctuation signal is generated between the two electrodes 4 of the detection assembly 10. The time interval between the wave signals of the two detection assemblies 10 is the transit time of the vortex in the pipe body 1. Under the condition that the geometric position between the two detection assemblies 10 is fixed, the transmission time is obtained through measurement, and the average flow velocity and the volume flow in the pipe body 1 can be calculated, so that the electromagnetic flowmeter arranged on the pipe body 1 is calibrated.
As shown in fig. 2, the connection line between the two electrodes 4 in the detection assembly 10 may be parallel to the horizontal direction, as shown in fig. 3, the connection line between the two electrodes 4 in the detection assembly 10 may also be perpendicular to the horizontal direction, and the direction of the connection line between the two electrodes 4 in the detection assembly 10 may be reasonably distributed according to the specific structures of the tube body 1 and the detection assembly 10.
In this embodiment, the turbulence generating body 2 is made of stainless steel, so as to increase the corrosion resistance of the turbulence generating body 2 and prolong the overall service life of the device. The thickness of the turbulence generating body 2 is 4mm, and the structural strength, reliability and other factors of the turbulence generating body 2 are ensured.
The pipe body 1 is cylindrical, the turbulence generating body 2 is semicircular, and the arc surface of the turbulence generating body 2 is attached to the inner wall of the pipe body 1. The turbulent flow generator 2 protrudes into the circulation channel along the radial direction of the pipe body 1, the protruding height of the turbulent flow generator 2 is h, and the inner diameter dimension of the circulation channel is D, wherein h is more than or equal to 0.3D and less than or equal to 0.4D. Specifically, in this embodiment, h=d/3, when the liquid medium flows through the turbulence generating body 2, a significant vortex can be generated so as to obtain a fluctuation signal.
As shown in fig. 4 and 5, a device mounting position 5 to be calibrated is arranged between the two detection assemblies 10. The flowmeter to be calibrated is arranged between two of said sensing assemblies 10. And comparing the detection value obtained by the flowmeter to be calibrated with the calculated value, and thus, calibrating the flowmeter to be calibrated.
In this embodiment, the distance between the two detecting assemblies 10 is L, and the value of L is increased, so that the flow rate measurement error caused by the uncertainty of L can be reduced. Meanwhile, under the condition that the flow rate of the fluid to be measured is constant, the value of L increases, that is, the distance between the two detecting assemblies 10 increases, and when the vortex in the fluid to be measured flows through the detecting assembly 10 at the downstream position, the diffusion degree of the vortex also increases correspondingly, so that the vortex cannot be effectively detected. Therefore, L needs to be properly valued, and specifically, L is more than or equal to 1.5D and less than or equal to 6D. D is the inner diameter dimension of the flow channel. In this example, D is 65mm and l=5d. The mounting distance between the electrode 4 of the detection assembly 10 and the magnet 3 in the detection assembly 10 in the extending direction of the fluid passage is W, w=7.5 mm, so as to leave a sufficient mounting gap.
Meanwhile, in the flowing direction of the medium in the pipe body 1, the distance between the detecting component 10 close to the turbulence generating body 2 and the turbulence generating body 2 can be selected according to the actual situation of the flowmeter calibrating device, if the distance between the detecting component 10 close to the turbulence generating body 2 and the turbulence generating body 2 is too small, the vortex does not cross the attachment point or form a vortex, so that the measured signals are disordered and cannot be identified. If the distance between the detecting element 10 and the turbulence generating body 2, which is close to the turbulence generating body 2, is too large, the vortex is severely attenuated and difficult to detect. The distance between the two detection assemblies 10 and the turbulence generating body 2 can thus be selected according to the actual situation of the flow meter calibration device.
In summary, according to the flowmeter calibration device of the present embodiment, when the medium in the tube flows through the turbulence generating body, a vortex is generated, and after the vortex passes through the attachment point, the magnetic force lines of the detection assembly are cut when the vortex sequentially passes through the two detection assemblies, and an ac fluctuation signal is generated between the two electrodes of the detection assemblies. The time interval between the wave signals of the two detection assemblies is the transmission time of the vortex in the pipe body. Under the condition that the geometric position between the two detection assemblies is fixed, the transmission time is obtained through measurement, and the average flow velocity and the volume flow in the pipe body can be calculated, so that the electromagnetic flowmeter arranged on the pipe body is calibrated.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A flowmeter calibration device, comprising:
The pipe body is internally provided with a hollow circulation channel extending along the length direction of the pipe body;
The turbulence generating body is arranged in the pipe body and partially blocks the circulation channel;
The two detection assemblies are arranged at intervals along the extending direction of the fluid channel;
The detection assembly comprises two magnets and two electrodes, wherein the two magnets are oppositely arranged on two sides of the circulation channel, the two magnets are mutually close to each other and are different in name between magnetic poles, the electrodes extend into the circulation channel, the two electrodes of the detection assembly are sequentially arranged along the extending direction of the fluid channel and are respectively positioned on two sides of a connecting line between the two magnets in the detection assembly, and the two electrodes are symmetrical about the connecting line between the two magnets.
2. The flow meter calibration set of claim 1 wherein: the turbulent flow generating body protrudes into the circulation channel along the radial direction of the pipe body, the protruding height of the turbulent flow generating body is h, the inner diameter size of the circulation channel is D, and h is more than or equal to 0.3D and less than or equal to 0.4D.
3. The flow meter calibration set of claim 2 wherein: h=d/3.
4. The flow meter calibration set of claim 1 wherein: the vortex generator is semicircular, and the arc surface of the vortex generator is attached to the inner wall of the pipe body.
5. The flow meter calibration set of claim 1 wherein: and a device installation position to be calibrated is arranged between the two detection assemblies.
6. The flow meter calibration set of claim 1 wherein: the distance between the two detection components is L, and the inner diameter size of the circulation channel is D, wherein L is more than or equal to 1.5D and less than or equal to 6D.
7. The flow meter calibration set of claim 6 wherein: l=5d.
8. The flow meter calibration set of claim 1 wherein: the turbulence generator is made of stainless steel.
9. The flow meter calibration set of claim 1 wherein: the thickness of the turbulence generating body is 4mm.
10. The flow meter calibration set of claim 1 wherein: the mounting distance between the electrode of the detection assembly and the magnet in the detection assembly in the extending direction of the fluid channel is W, w=7.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410078538.8A CN117889942A (en) | 2024-01-18 | 2024-01-18 | Flowmeter calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410078538.8A CN117889942A (en) | 2024-01-18 | 2024-01-18 | Flowmeter calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117889942A true CN117889942A (en) | 2024-04-16 |
Family
ID=90650442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410078538.8A Pending CN117889942A (en) | 2024-01-18 | 2024-01-18 | Flowmeter calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117889942A (en) |
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2024
- 2024-01-18 CN CN202410078538.8A patent/CN117889942A/en active Pending
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