CN116499537A - Lining-free electromagnetic flowmeter - Google Patents
Lining-free electromagnetic flowmeter Download PDFInfo
- Publication number
- CN116499537A CN116499537A CN202310552042.5A CN202310552042A CN116499537A CN 116499537 A CN116499537 A CN 116499537A CN 202310552042 A CN202310552042 A CN 202310552042A CN 116499537 A CN116499537 A CN 116499537A
- Authority
- CN
- China
- Prior art keywords
- groups
- magnetic
- linerless
- electrode
- magnetic field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000005284 excitation Effects 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- 230000006698 induction Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- -1 Polytetrafluoroethylene Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000004323 axial length 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
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to the technical field of electromagnetic flow meters, in particular to a lining-free electromagnetic flow meter, which is characterized in that a circulation mechanism is arranged on a fluid conveying pipeline to enable fluid to flow through the circulation mechanism, a magnetic field is generated by an exciting coil mechanism, the fluid cuts magnetic force lines in the magnetic field, induced electromotive force is generated by detecting the magnetic force lines in the fluid cutting magnetic field through an externally inserted electrode, and then the detection result is calculated through a converter to obtain the fluid flow, so that the practicability of equipment is improved; comprises a circulation mechanism and a converter; the device also comprises an external electrode and an excitation coil mechanism, wherein the external electrode and the excitation coil mechanism are both arranged in the circulation mechanism, and the converter is arranged on the circulation mechanism; the circulation mechanism conveys fluid, the exciting coil mechanism generates a magnetic field, the external electrode detects the magnetic force lines in the fluid cutting magnetic field to generate induced electromotive force, and the converter calculates the detection result of the external electrode.
Description
Technical Field
The invention relates to the technical field of electromagnetic flowmeters, in particular to a lining-free electromagnetic flowmeter.
Background
In the liquid energy trade process, various fluid measuring devices are widely used according to different working conditions on site, most of the fluid measuring devices have application defects in the use process, a flowmeter with very low cost performance is wasted for users, and meanwhile, the metering or trade accounting requirements cannot be met, but in the field of measuring process media such as corrosive liquid, fuel oil, heavy oil, slurry fluid, especially sewage and residual oil containing granular impurities (the conductivity is more than or equal to 5 mu s/cm), most of the flow measuring devices have application defects in the use process.
If the metal tube float flowmeter can measure gas and liquid, but the influence of the viscosity of the medium is large, the viscosity compensation is difficult to be completely eliminated, and the float is easy to be blocked by granular process medium;
the vortex shedding flowmeter and the precession vortex flowmeter can measure gas, superheated steam, saturated steam and liquid, but the vortex shedding flowmeter and the precession vortex flowmeter are also greatly influenced by the viscosity of a medium and have certain pressure loss, and the vortex shedding flowmeter and the precession vortex flowmeter cannot be used when the pressure loss is not allowed;
the signal collection of the vortex shedding flowmeter and the precession vortex flowmeter is a piezoelectric sensor, the sensor is of a sheet structure, and a process medium contains particles, so that the piezoelectric sensor is easy to damage and deform, and the service life of the flowmeter is influenced;
a flange type electromagnetic flowmeter, such as an electromagnetic flowmeter disclosed in the patent publication No. CN213956480U, is known in the prior art, although the accuracy is high, the differential pressure value is theoretically: "0", it not only has higher price/performance ratio, and the degree of accuracy also can fully satisfy the requirement of measurement trade, obtains wide application in each trade, but pipeline formula electromagnetic flowmeter has a natural defect, namely: the flange type electromagnetic flowmeter with Polytetrafluoroethylene (PTFE) lining has a certain cost performance, and when the process medium is slurry fluid, especially sewage and residual oil containing granular impurities, the polytetrafluoroethylene lining has lower wear resistance, thus the service life of the electromagnetic flowmeter is easy to be reduced. However, although ceramic lining electromagnetic flowmeter has high hardness and good wear resistance, and is suitable for wide variety of process media, the bonding process between ceramic lining and electromagnetic flowmeter measuring tube (material: austenitic stainless steel) is very complex, and the high hardness property of ceramic lining and electromagnetic flowmeter measuring tube causes brittleness, brittleness and difficult processing of ceramic lining, thus greatly improving manufacturing cost and resulting in poor practicability, so there is a need for a lining-free electromagnetic flowmeter.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a linerless electromagnetic flowmeter in which a circulation mechanism is mounted on a fluid delivery pipeline, so that fluid flows through the circulation mechanism, a magnetic field is generated by an exciting coil mechanism, magnetic lines of force in the magnetic field are cut by the fluid, induced electromotive force is detected by an externally inserted electrode on the magnetic lines of force in the magnetic field, and then a fluid flow is obtained by calculating a detection result through a converter, thereby improving the practicability of the equipment.
The invention relates to a lining-free electromagnetic flowmeter, which comprises a circulation mechanism and a converter; the device also comprises an external electrode and an excitation coil mechanism, wherein the external electrode and the excitation coil mechanism are both arranged in the circulation mechanism, and the converter is arranged on the circulation mechanism;
the fluid is conveyed by the circulation mechanism, a magnetic field is generated by the excitation coil mechanism, induced electromotive force is generated by the externally inserted electrode for detecting magnetic force lines in the fluid cutting magnetic field, and the detection result of the externally inserted electrode is calculated by the converter;
the circulation mechanism is arranged on a fluid conveying pipeline, so that fluid flows through the circulation mechanism, meanwhile, the exciting coil mechanism generates a magnetic field, magnetic lines of force in the fluid cutting magnetic field are cut, induced electromotive force generated by the magnetic lines of force in the fluid cutting magnetic field is detected through the externally inserted electrode, and then the detection result is calculated through the converter to obtain fluid flow, so that the practicability of the device is improved.
Preferably, the exciting coil mechanism comprises a magnetic field shielding cover, two groups of magnetic coil frameworks, two groups of magnetic coils, two groups of white strips and two groups of magnetic conductive plates, the magnetic field shielding cover is sleeved on the circulation mechanism, the two groups of magnetic coil frameworks are all installed between the magnetic field shielding cover and the circulation mechanism, the two groups of top magnetic coil frameworks are positioned at the top of the circulation mechanism, magnetic cores are arranged in the two groups of magnetic coil frameworks, the bottom magnetic coil frameworks are positioned at the bottom of the circulation mechanism, the two groups of magnetic coils are respectively wound on the two groups of magnetic coil frameworks, the two groups of white strips are respectively wound on the two groups of magnetic force lines, one ends of the two groups of magnetic conductive plates are all installed on the top magnetic coil frameworks, and the other ends of the two groups of magnetic conductive plates are all installed on the bottom magnetic coil frameworks; through being connected excitation coil mechanism and converter electricity, afterwards form the magnetic field through two sets of magnetic force coil skeletons, two sets of magnetic force coils, two sets of white strip area and two sets of magnetic conduction board cooperation, carry out the cage to two sets of magnetic force coil skeletons, two sets of magnetic force coils, two sets of white strip area and two sets of magnetic conduction board through the magnetic field shield simultaneously, seal the magnetic field, afterwards fluid passes through between two sets of magnetic force coil skeletons, makes the magnetic force line in the fluid cutting magnetic field to improve the practicality of equipment.
Preferably, the circulation mechanism comprises a measuring tube, a converter connecting disc supporting tube, a converter connecting disc and two groups of flanges, the magnetic field shielding cover is sleeved on the measuring tube, the two groups of magnetic coil frameworks, the two groups of magnetic coils, the two groups of white strips and the two groups of magnetic conduction plates are all arranged between the magnetic field shielding cover and the measuring tube, the bottom end of the converter connecting disc supporting tube is connected with the top end of the magnetic field shielding cover, the bottom end of the converter connecting disc is connected with the top end of the converter connecting disc supporting tube, and the two groups of flanges are respectively arranged at the left end and the right end of the measuring tube; the measuring tube is arranged on the conveying pipeline through the two groups of flanges, so that the circulation flows through the measuring tube, and the practicability of the equipment is improved.
Preferably, the externally inserted electrode comprises a plurality of groups of bolts, two groups of lining-free electrode pressing plates, two groups of insulating gaskets, two groups of lining-free electrodes, two groups of lining-free electrode upper insulating sleeves, two groups of lining-free electrode lower insulating sleeves, a plurality of groups of graphite gaskets and two groups of lining-free electrode fixing seats, the two groups of lining-free electrodes are respectively and fixedly arranged on the two groups of lining-free electrode pressing plates, the two groups of lining-free electrodes are respectively and fixedly arranged on the two groups of lining-free electrode fixing seats through the plurality of groups of bolts, the two groups of lining-free electrode fixing seats are respectively and fixedly arranged on the measuring tube, the two groups of lining-free electrode upper insulating sleeves and the two groups of lining-free electrode lower insulating sleeves are respectively sleeved on the two groups of lining-free electrodes, one ends of the two groups of lining-free electrodes extend into the measuring tube, the axes of the two groups of lining-free electrodes are perpendicular to the axes of the measuring tube and magnetic force lines in a magnetic field, and the plurality of groups of graphite gaskets are respectively arranged on the two groups of lining-free electrode lower insulating sleeves; the two groups of unlined electrodes are electrically connected with the converter, so that the two groups of unlined electrodes detect the magnetic force lines of fluid cutting to generate induced electromotive force, and the detection result is transmitted to the converter, thereby improving the practicability of the device.
Preferably, the two groups of lining-free electrodes are made of YG3 alloy; thereby improving the Rockwell hardness and the flexural strength of the two groups of unlined electrodes.
Preferably, instrument support legs are arranged at the bottom ends of the two groups of flanges; the equipment is convenient to support.
Preferably, the two groups of lining-free electrodes detect the magnetic force lines cut by the fluid to generate induced electromotive force, the magnitude of the induced electromotive force is in direct proportion to the flow velocity of the process medium, and the magnitude of the induced electromotive force is as follows: ex=k×b×v×d.
Preferably, the exciting coil has moderate resistance, and the excessive resistance can increase power consumption, and the too small resistance can cause the exciting coil to have too low power, so that the corresponding inductive reactance is realized when the inductance is reasonably selected, and the mutual relations between the inductive reactance are as follows: xl=2pi fL.
Compared with the prior art, the invention has the beneficial effects that:
1. the lining in the electromagnetic flowmeter is omitted, so that the processing technology of the electromagnetic flowmeter is simplified, and the production cost of the electromagnetic flowmeter is reduced;
2. the detection of the induced electromotive force generated by the magnetic force lines in the fluid cutting magnetic field is facilitated;
3. the abrasion resistance and corrosion resistance of the electrode and the measuring tube are improved, and the corrosive fluid of acid, alkali and salt is conveniently detected.
Drawings
FIG. 1 is a schematic elevational view of the present invention;
FIG. 2 is a right side view of the present invention;
FIG. 3 is a schematic view of a left-hand cross-sectional structure of the present invention;
FIG. 4 is an enlarged schematic cross-sectional elevation view of the field case and the measuring tube of the present invention;
FIG. 5 is a schematic diagram of the field coil structure of the present invention;
FIG. 6 is a schematic view of the structure of the magnetic bobbin, magnetic coil and white tape of the present invention;
FIG. 7 is a schematic view of an enlarged left-hand view of the measuring tube and the extrapolated electrode of the present invention;
FIG. 8 is a schematic view of the right-side view of the unlined electrode, the unlined electrode upper insulating sleeve and the unlined electrode lower insulating sleeve of the present invention;
FIG. 9 is a schematic diagram of the left-hand enlarged structure of the field case, transducer connection pad support tube and transducer connection pad of the present invention;
the reference numerals in the drawings: 1. a converter; 2. a magnetic field shield; 3. a magnetic coil former; 4. a magnetic coil; 5. white strip; 6. a magnetic conductive plate; 7. a bolt; 8. a linerless electrode platen; 9. an insulating spacer; 10. a linerless electrode; 11. an insulating sleeve is arranged on the unlined electrode; 12. a liner-free electrode lower insulating sleeve; 13. a graphite gasket; 14. a measuring tube; 15. a transducer connection pad support tube; 16. a transducer land; 17. a flange; 18. a linerless electrode holder; 19. gauge stand bars.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. This invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Examples
As shown in fig. 1 to 9, comprises a flow-through mechanism and a transducer 1;
the device also comprises an external electrode and an excitation coil mechanism, wherein the external electrode and the excitation coil mechanism are both arranged in the circulation mechanism, and the converter 1 is arranged on the circulation mechanism;
the circulation mechanism conveys fluid, the exciting coil mechanism generates a magnetic field, the external electrode detects the magnetic force lines in the fluid cutting magnetic field to generate induced electromotive force, and the converter 1 calculates the detection result of the external electrode;
the exciting coil mechanism comprises a magnetic field shielding cover 2, two groups of magnetic coil frameworks 3, two groups of magnetic coils 4, two groups of white strips 5 and two groups of magnetic conduction plates 6, wherein the magnetic field shielding cover 2 is sleeved on the circulating mechanism, the two groups of magnetic coil frameworks 3 are all installed between the magnetic field shielding cover 2 and the circulating mechanism, the two groups of top magnetic coil frameworks 3 are positioned at the top of the circulating mechanism, the bottom magnetic coil frameworks 3 are positioned at the bottom of the circulating mechanism, the two groups of magnetic coils 4 are respectively wound on the two groups of magnetic coil frameworks 3, the two groups of white strips 5 are respectively wound on the two groups of magnetic coils 4, one ends of the two groups of magnetic conduction plates 6 are all installed on the top magnetic coil frameworks 3, and the other ends of the two groups of magnetic conduction plates 6 are all installed on the bottom magnetic coil frameworks 3;
the circulation mechanism comprises a measuring tube 14, a converter connecting disc supporting tube 15, a converter connecting disc 16 and two groups of flanges 17, the magnetic field shielding cover 2 is sleeved on the measuring tube 14, the two groups of magnetic coil frameworks 3, the two groups of magnetic coils 4, the two groups of white strips 5 and the two groups of magnetic guide plates 6 are all arranged between the magnetic field shielding cover 2 and the measuring tube 14, the bottom end of the converter connecting disc supporting tube 15 is connected with the top end of the magnetic field shielding cover 2, the bottom end of the converter connecting disc 16 is connected with the top end of the converter connecting disc supporting tube 15, and the two groups of flanges 17 are respectively arranged at the left end and the right end of the measuring tube 14;
the externally inserted electrode comprises a plurality of groups of bolts 7, two groups of lining-free electrode pressing plates 8, two groups of insulating gaskets 9, two groups of lining-free electrodes 10, two groups of lining-free electrode upper insulating sleeves 11, two groups of lining-free electrode lower insulating sleeves 12, a plurality of groups of graphite gaskets 13 and two groups of lining-free electrode fixing seats 18, wherein the two groups of lining-free electrodes 10 are respectively and fixedly arranged on the two groups of lining-free electrode pressing plates 8, the insulating gaskets 9 are respectively arranged between the two groups of lining-free electrodes 10 and the two groups of lining-free electrode pressing plates 8, the two groups of lining-free electrode pressing plates 8 are respectively and fixedly arranged on the two groups of lining-free electrode fixing seats 18 through the plurality of groups of bolts 7, the two groups of lining-free electrode fixing seats 18 are respectively and fixedly arranged on the measuring tube 14, the two groups of lining-free electrode upper insulating sleeves 11 and the two groups of lining-free electrode lower insulating sleeves 12 are respectively sleeved on the two groups of lining-free electrodes 10, one ends of the two groups of lining-free electrodes 10 extend into the measuring tube 14, and the axes of the two groups of lining-free electrodes 10 are perpendicular to the axes of the measuring tube 14 and magnetic lines in a magnetic field;
the two groups of lining-free electrodes 10 are made of YG3 alloy;
the bottom ends of the two groups of flanges 17 are provided with instrument support legs 19;
the two groups of lining-free electrodes 10 detect the induced electromotive force generated by the cutting of magnetic force lines by the fluid, the numerical value of the induced electromotive force is in direct proportion to the flow velocity of the process medium, and the numerical value is as follows: ex=k×b×v×d;
the exciting coil has moderate resistance, the power consumption can be increased due to the overlarge resistance, the exciting coil is too low in power due to the overlarge resistance, the inductance is reasonably selected, and meanwhile, the corresponding inductance is related to the relationship: xl=2pi fL;
the measuring tube 14 is firstly arranged on a circulating conveying pipeline through two groups of flanges 17, so that circulation flows through the measuring tube 14, an excitation coil mechanism is electrically connected with the converter 1, then a magnetic field is formed through the cooperation of the two groups of magnetic coil frameworks 3, the two groups of magnetic coils 4, the two groups of white strips 5 and the two groups of magnetic conduction plates 6, the two groups of magnetic coil frameworks 3, the two groups of magnetic coils 4, the two groups of white strips 5 and the two groups of magnetic conduction plates 6 are covered by the magnetic field shielding cover 2, the magnetic field is sealed, then fluid passes through the two groups of magnetic coil frameworks 3, so that magnetic lines of force in the fluid cutting magnetic field are enabled to be electrically connected with the converter 1 through the two groups of unlined electrodes 10, the two groups of unlined electrodes 10 detect the fluid cutting magnetic lines of force to generate induced electromotive force, the detection result is transmitted to the converter 1, and then the detection result is calculated through the converter 1, so that the fluid flow is obtained.
The use principle is as follows:
according to Faraday electromagnetic induction principle, two symmetrical detection electrodes with the same axis are assembled on a measuring tube perpendicular to the axis of the measuring tube and magnetic force lines, when conductive liquid with conductivity more than or equal to 5 mu s/cm moves along the axis of the measuring tube, the two electrodes detect that a conductive medium cuts the magnetic force lines to generate induced electromotive force, the value of the induced electromotive force is in direct proportion to the flow velocity of a process medium, and the value is as follows: ex=k×b×v×d;
wherein:
ex- -induced electromotive force- -units of: volts V;
k-coefficient meter coefficient related to magnetic field distribution and axial length;
the magnetic induction density of the magnetic field is equal to the magnetic induction density of the magnetic field, and the magnetic induction density of the magnetic field is equal to the magnetic induction density of the magnetic field: tesla T;
v-average flow rate of conductive liquid-units: m/s;
d- -inter-electrode distance measuring tube inner diameter- -units: m;
in order to enhance the magnetic induction electromotive force, the resistance value of the exciting coil which is matched with the functional circuit board of the converter and is reasonably designed is reasonably selected to increase the winding turns and the winding method of the exciting coil on the premise that the rated power and the service life of the sensor are ensured in a limited space of the sensor. According to the national standard of the people's republic of China, the first part of enamelled round winding wire generally prescribes standard numbers: GB/T6109.1-2008 selects wire diameter and material, and designs the main performance index of the exciting coil, namely the inductance, of the exciting coil in the optimal state, as shown in the structural principle of the exciting coil in FIG. 5, meanwhile, the size and the moderate resistance of the exciting coil are considered, the power consumption can be increased due to the overlarge resistance, and the overlarge resistance causes too low power and high voltage alternating current of the exciting coil: power=31/2×square of current×resistance value; direct current: power = square of current x resistance value. Therefore, when the inductance is reasonably selected, the inductance also has a corresponding inductance, and the mutual relation between the inductance and the inductance is as follows: xl=2pi fL
Wherein:
XL- -inductive reactance- -units of the molecule: ohmic Ω;
f- -alternating current frequency- -units of: hz;
l, inductance, unit: henry H;
the magnetic core is additionally arranged in the framework of the exciting coil, and the exciting coil is closed by the two magnetic conduction plates, so that magnetic force lines form a closed loop, and the strength of the magnetic field is enhanced.
The transducer 1, transducer land support tube 15, transducer land 16, flange 17 and meter feet 19 of the linerless electromagnetic flowmeter of the present invention are commercially available and can be installed and operated by those skilled in the art according to their attendant instructions without the need for creative effort by those skilled in the art.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (6)
1. A linerless electromagnetic flowmeter comprising a flow-through mechanism and a transducer (1); the device is characterized by further comprising an external electrode and an excitation coil mechanism, wherein the external electrode and the excitation coil mechanism are both arranged in the circulation mechanism, and the converter (1) is arranged on the circulation mechanism;
the fluid is conveyed by the circulation mechanism, a magnetic field is generated by the exciting coil mechanism, an external electrode detects the magnetic force lines in the fluid cutting magnetic field to generate induced electromotive force, and a converter (1) calculates the detection result of the external electrode.
2. The lining-free electromagnetic flowmeter of claim 1, wherein the exciting coil mechanism comprises a magnetic field shielding cover (2), two groups of magnetic coil frameworks (3), two groups of magnetic coils (4), two groups of white strips (5) and two groups of magnetic guide plates (6), the magnetic field shielding cover (2) is sleeved on the circulating mechanism, the two groups of magnetic coil frameworks (3) are all installed between the magnetic field shielding cover (2) and the circulating mechanism, the two groups of top magnetic coil frameworks (3) are located at the top of the circulating mechanism, the bottom magnetic coil frameworks (3) are located at the bottom of the circulating mechanism, the two groups of magnetic coils (4) are respectively wound on the two groups of magnetic coil frameworks (3), the two groups of white strips (5) are respectively wound on the two groups of magnetic coils (4), one ends of the two groups of magnetic guide plates (6) are all installed on the top magnetic coil frameworks (3), and the other ends of the two groups of magnetic guide plates (6) are all installed on the bottom magnetic coil frameworks (3).
3. The lining-free electromagnetic flowmeter of claim 2, wherein the circulating mechanism comprises a measuring tube (14), a transducer connection disc supporting tube (15), a transducer connection disc (16) and two groups of flanges (17), the magnetic field shielding cover (2) is sleeved on the measuring tube (14), the two groups of magnetic coil frameworks (3), the two groups of magnetic coils (4), the two groups of white strips (5) and the two groups of magnetic conducting plates (6) are all arranged between the magnetic field shielding cover (2) and the measuring tube (14), the bottom end of the transducer connection disc supporting tube (15) is connected with the top end of the magnetic field shielding cover (2), the bottom end of the transducer connection disc (16) is connected with the top end of the transducer connection disc supporting tube (15), and the two groups of flanges (17) are respectively arranged at the left end and the right end of the measuring tube (14).
4. The electromagnetic flowmeter of claim 3, wherein the externally inserted electrode comprises a plurality of groups of bolts (7), two groups of linerless electrode pressing plates (8), two groups of insulating gaskets (9), two groups of linerless electrodes (10), two groups of linerless electrode upper insulating sleeves (11), two groups of linerless electrode lower insulating sleeves (12), a plurality of groups of graphite gaskets (13) and two groups of linerless electrode fixing seats (18), the two groups of linerless electrodes (10) are respectively and fixedly arranged on the two groups of linerless electrode pressing plates (8), the two groups of linerless electrodes (10) and the two groups of linerless electrode pressing plates (8) are respectively and fixedly arranged on the insulating gaskets (9) through the plurality of groups of bolts (7), the two groups of linerless electrode fixing seats (18) are respectively and fixedly arranged on the measuring tube (14), the two groups of linerless electrode upper insulating sleeves (11) and the two groups of linerless electrode lower insulating sleeves (12) are respectively arranged on the two groups of linerless electrode (10), the two groups of linerless electrode (10) and the two groups of linerless electrode pressing plates (8) are respectively and fixedly arranged on the insulating gaskets (18), the two groups of linerless electrode fixing seats (10) are respectively and the two linerless electrode fixing seats (14) are respectively and the magnetic field lines extend to the axes of the two sets (14) and one end of the two sets are perpendicular to the axes of the two magnetic field lines of the measuring electrode, and a plurality of groups of graphite gaskets (13) are respectively arranged on the two groups of lining-free electrode lower insulating sleeves (12).
5. A linerless electromagnetic flowmeter as recited in claim 4 wherein said linerless electrodes (10) are each formed from YG3 alloy.
6. A linerless electromagnetic flowmeter according to claim 3 wherein said flanges (17) are provided at bottom ends thereof with meter feet (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310552042.5A CN116499537A (en) | 2023-05-17 | 2023-05-17 | Lining-free electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310552042.5A CN116499537A (en) | 2023-05-17 | 2023-05-17 | Lining-free electromagnetic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116499537A true CN116499537A (en) | 2023-07-28 |
Family
ID=87330237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310552042.5A Pending CN116499537A (en) | 2023-05-17 | 2023-05-17 | Lining-free electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116499537A (en) |
-
2023
- 2023-05-17 CN CN202310552042.5A patent/CN116499537A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101929883B (en) | Method for measuring flow of conductive fluid in non-full pipe by using electromagnetic flow meter | |
| CN103140742A (en) | Electromagnetic flow meter | |
| RU2401990C2 (en) | Magnetic-inductive flow metre | |
| CN219757416U (en) | Lining-free electromagnetic flowmeter | |
| CN105509824B (en) | A kind of magneto flow of liquid metal gauge | |
| CN116499537A (en) | Lining-free electromagnetic flowmeter | |
| CN101865712A (en) | Novel electromagnetic flowmeter | |
| CN102445245B (en) | Flow rate measurement device based on bridge-type flow rate measurement and electromagnetic flow rate measurement | |
| CN104019860A (en) | Flowmeter integrating electromagnetism and ultrasonic and use method of flowmeter | |
| CN104458108B (en) | Method for measuring pressure drop of liquid metal pipe flow magnetic fluid under high-intensity magnetic field | |
| CN106950258A (en) | The sender device of measurement residual acidity or basicity in ore pulp is leached for uranium mine | |
| CN207894462U (en) | A kind of wide-range compares electromagnetic flow transducer | |
| CN201653472U (en) | Electromagnetic flowmeter | |
| CN211602045U (en) | Plug-in electromagnetic flowmeter | |
| CN209927194U (en) | High-precision electromagnetic water meter | |
| CN207379558U (en) | Four electrodes substitute ground loop intelligent electromagnetic flowmeter | |
| RU127905U1 (en) | FLUID METER FLOW METER | |
| RU116229U1 (en) | ELECTROMAGNETIC FLOW METER OF LIQUID METAL | |
| CN205879265U (en) | Electromagnetic flowmeter | |
| CN105067055A (en) | Electromagnetic flow transducer with unlined measurement cavity | |
| CN219656940U (en) | Sensor structure of pipeline type electromagnetic flowmeter | |
| CN203657868U (en) | Electromagnetic and ultrasonic integrated-design flow meter | |
| CN213274390U (en) | Electromagnetic flowmeter for measuring non-full pipe of sensor | |
| CN2449199Y (en) | Intelligent electromagnetic flow meter | |
| CN211262342U (en) | Electromagnetic flowmeter with double-group electrodes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |