CN114111926A - Plug-in type electromagnetic flowmeter sensor and preparation method thereof - Google Patents
Plug-in type electromagnetic flowmeter sensor and preparation method thereof Download PDFInfo
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- CN114111926A CN114111926A CN202111482080.5A CN202111482080A CN114111926A CN 114111926 A CN114111926 A CN 114111926A CN 202111482080 A CN202111482080 A CN 202111482080A CN 114111926 A CN114111926 A CN 114111926A
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- 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
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- Physics & Mathematics (AREA)
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Abstract
The invention belongs to the field of flowmeters, and discloses an insertion type electromagnetic flowmeter sensor and a preparation method thereof, wherein the insertion type electromagnetic flowmeter sensor comprises an electrode base, a grounding electrode, a shell and two signal electrodes; the electrode base is connected with the shell, and two signal electrode mounting holes and a grounding electrode mounting hole are formed in the electrode base; one ends of the two signal electrodes respectively penetrate through the two signal electrode mounting holes and are positioned in the shell, and signal wires are arranged at the ends of the two signal electrodes; one end of the grounding electrode penetrates through the mounting hole of the grounding electrode and is positioned in the shell, and the grounding wire is arranged on the end of the grounding electrode; a lead tube is arranged in the shell, and the signal wire and the grounding wire are led out through the lead tube; a coil wheel is sleeved outside the lead tube, a coil is arranged on the coil wheel, and excitation wires are led out from two ends of the coil; and a grounding outlet wire is arranged on the inner wall of the shell and is connected with a grounding wire. The plug-in electromagnetic flowmeter sensor has the advantages of economy, small size, capability of being installed under pressure and being overhauled without stopping water.
Description
Technical Field
The invention belongs to the field of flowmeters, and relates to an insertion type electromagnetic flowmeter sensor and a preparation method thereof.
Background
With the development of information-based construction, flow measurement and control are widely applied to the fields of industrial departments such as chemical industry, metallurgy, water supply and drainage, steel, coal, paper making, food, light textile, environmental protection and the like, municipal administration, water conservancy construction and the like, and the market demand is large. The flowmeter has a plurality of measuring principles for gas and liquid, for example, an electromagnetic flowmeter, a Coriolis force mass flowmeter, a turbine flowmeter, a vortex shedding flowmeter, an ultrasonic flowmeter, an orifice plate flowmeter, a differential pressure flowmeter and the like which are mainstream in the industry have better application effects.
Because of the structural characteristics of pipeline formula measuring instrument for the measuring instrument bore must with the pipeline one-to-one, the product does not possess the expansibility, and product production size is more, and product weight varies from several kilograms to several tons. The cost increase of whole production, purchase, storage and transportation links has also been caused like this to, because its structure causes the installation degree of difficulty big, construction cost is high, shortcoming such as cost of maintenance height, if the installation of tube segment formula electromagnetic flowmeter need cut whole pipe section, weld corresponding material flange, the job site degree of difficulty increases, increases consuming time, and must install the telescopic joint during the installation, with the assurance reasonable installation distance, the job site degree of difficulty increases.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings of the prior art and providing an insertion-type electromagnetic flowmeter sensor and a method for making the same.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the invention, an insertion type electromagnetic flowmeter sensor comprises an electrode base, a grounding electrode, a shell and two signal electrodes; the electrode base is connected with the shell, and two signal electrode mounting holes and a grounding electrode mounting hole are formed in the electrode base; one ends of the two signal electrodes respectively penetrate through the two signal electrode mounting holes and are positioned in the shell, and signal wires are arranged at the ends of the two signal electrodes; one end of the grounding electrode penetrates through the mounting hole of the grounding electrode and is positioned in the shell, and the grounding wire is arranged on the end of the grounding electrode; a lead tube is arranged in the shell, and the signal wire and the grounding wire are led out through the lead tube; a coil wheel is sleeved outside the lead tube, a coil is arranged on the coil wheel, and excitation wires are led out from two ends of the coil; and a grounding outlet wire is arranged on the inner wall of the shell and is connected with a grounding wire.
Optionally, an epoxy resin pouring sealant is filled in a gap between the electrode base and the inside of the housing.
Optionally, the ground electrode is located between the two signal electrodes and has the same distance with the two signal electrodes.
Optionally, a magnetizing pressing block is arranged at one end of the coil wheel far away from the electrode base.
Optionally, the ground electrode and the two signal electrodes both use shuttle mirror electrodes.
Optionally, electrode sealing rings are respectively arranged between the grounding electrode and one end of the electrode base far away from the shell, and between the signal electrode and one end of the electrode base far away from the shell, and a base sealing ring is arranged at the joint of the electrode base and the shell.
Optionally, the device further comprises a bolt and nut washer set; the grounding electrode and the two signal electrodes are connected with the electrode base through bolts and nut gasket groups, and the coil base is in interference connection with the shell; the outer wall of one end of the shell, which is far away from the electrode base, is provided with threads.
Optionally, the ground electrode, the signal electrode and the inner wall of the housing are all provided with OT terminals; the OT terminal arranged on the grounding electrode is used for connecting a grounding wire; the OT terminal arranged on the signal electrode is used for connecting a signal line; the OT terminal arranged on the inner wall of the shell is used for being connected with a grounding outlet, and the grounding seat used for fixing the OT terminal is further arranged on the inner wall of the shell.
Optionally, the ground electrode and the two signal electrodes are both made of 316 stainless steel, and the shell is made of 304 stainless steel; the electrode base is made of PEEK resin and is integrally processed and molded.
In a second aspect of the present invention, a method for manufacturing an insertion-type electromagnetic flowmeter sensor includes the following steps:
carrying out electrode polarization on the grounding electrode and the two signal electrodes; sleeving electrode sealing rings on a grounding electrode and two signal electrodes after electrode polarization, and respectively installing and fastening the grounding electrode and the two signal electrodes in a grounding electrode installation hole and two signal electrode installation holes of an electrode base;
one end of a grounding wire and one end of two signal wires are respectively connected with the grounding electrode and the two signal electrodes, and the other end of the grounding wire and the other end of the two signal wires penetrate through the lead tube;
encapsulating and curing a layer of epoxy resin encapsulating adhesive on the surface of the electrode base; wherein the epoxy resin pouring sealant does not exceed the horizontal plane of the electrode base; installing a coil wheel on a lead tube, installing the coil on the coil wheel, and leading out two excitation wires at two ends of the coil; installing the shell and the electrode base in interference fit; a grounding outlet is arranged on the inner wall of the shell and is connected with a grounding wire;
and straightening the grounding outgoing line, the signal line and the excitation wire, and encapsulating and curing the grounding outgoing line, the signal line and the excitation wire in the shell by adopting epoxy resin encapsulating glue for more than 5cm to obtain the plug-in type electromagnetic flowmeter sensor.
Compared with the prior art, the invention has the following beneficial effects:
the plug-in type electromagnetic flowmeter sensor realizes plug-in type installation of a flowmeter, can be installed under pressure and overhauled without stopping water, effectively solves the problems that the difficulty of a construction site is increased and the time consumption is increased because the existing flowmeter sensor is limited by a pipe section measuring principle and a whole pipe section needs to be cut and welded with a flange made of a corresponding material, and is convenient to install because a telescopic joint does not need to be installed during installation. Simultaneously, flowmeter sensor's bore need not be with the pipeline one-to-one, has measurement bore expansibility, measures to different pipe diameter flow rates, and the product only needs to increase and connects shell length, can be applicable to multiple measurement pipeline bore requirement, possesses the expansibility of height, reduces the cost input of each link such as production, purchase, storage, transportation and maintenance.
Further, the grounding electrode is positioned between the two signal electrodes and has the same distance with the two signal electrodes. By adding the grounding electrode and the two signal electrodes at equal intervals, the reference of zero potential is increased, the positive and negative charges of alternating potential are ensured not to be accumulated at the electrode ends, and the measurement precision is improved.
Furthermore, a magnetizing pressing block is arranged at one end of the coil wheel, which is far away from the electrode base, and the magnetizing pressing block not only has a better magnetizing effect, but also improves the magnetic field intensity and stability and reduces the magnetic leakage phenomenon; and, can play certain guard action to coil wheels.
Furthermore, the grounding electrode and the two signal electrodes adopt shuttle-shaped mirror surface electrodes. By adopting the shuttle-shaped electrode, the flow guide effect is effectively carried out, the disturbance of water flow generated between the electrode tips is reduced, the stability of a flow field is improved, the surface area of the electrode is increased, the acquisition effect of potential signals is improved, the signal stability of each flow velocity section of the product in high, medium and low is improved, and the repeatability and the linearity of the product are improved. And moreover, through mirror surface treatment, the adhesion of dirt and calcifications in the measured liquid is greatly reduced, and the long-term stability and reliability of the product are improved.
Drawings
FIG. 1 is a schematic cross-sectional view of an electromagnetic flow meter sensor of the present invention;
FIG. 2 is a cross-sectional view of another cross-sectional angle of the insertion-type electromagnetic flow meter sensor of the present invention;
FIG. 3 is an exploded view of an inserted electromagnetic flowmeter sensor of the present invention;
FIG. 4 is a schematic diagram of the signal, ground and excitation wire connections of the present invention;
FIG. 5 is a schematic diagram of the measurement principle of the plug-in electromagnetic flowmeter sensor of the invention;
FIG. 6 is a schematic view of a plug-in electromagnetic flow meter sensor of the present invention in use;
fig. 7 is a schematic diagram of a plug-in electromagnetic flowmeter sensor of the present invention in use.
Wherein: 1-a signal electrode; 2-electrode sealing ring; 3-a ground electrode; 4-base seal ring; 5-an electrode base; a 6-OT terminal; 7-bolt and nut washer group; 8-a lead tube; 9-coil wheel; 10-a coil; 11-magnetizing briquetting; 12-a housing; 13-epoxy resin pouring sealant; 14-a ground pad; 15-a ground line; 16-signal lines; 17-excitation wire.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
based on the principle, referring to fig. 1 to 4, in an embodiment of the present invention, an economical, small and exquisite plug-in electromagnetic flowmeter sensor with pressure installation and non-stop water maintenance is provided, so as to provide an economical and high-precision flow measurement and control product for the market.
The plug-in electromagnetic flowmeter sensor comprises an electrode base 5, a grounding electrode 3, a shell 12 and two signal electrodes 1; the electrode base 5 is connected with the shell 12, and two signal electrode mounting holes and a grounding electrode mounting hole are formed in the electrode base 5; one ends of the two signal electrodes 1 respectively penetrate through the two signal electrode mounting holes and are positioned on the electrode base 5, and the ends of the two signal electrodes 1 are provided with signal wires 16; one end of the grounding electrode 3 passes through the mounting hole of the grounding electrode and is positioned on the electrode base 5, and the grounding wire 15 is arranged on the end of the grounding electrode 3; a lead tube 8 is arranged in the shell 12, the electrode base 5 is connected with the lead tube 8, and the signal wire 16 and the grounding wire 15 are led out through the lead tube 8; a coil wheel 9 is sleeved outside the lead tube, a coil 10 is arranged on the coil wheel 9, and excitation wires 17 are led out from two ends of the coil 10; and a grounding outlet is arranged on the inner wall of the shell 12 and is connected with a grounding wire 15.
Referring to fig. 5 to 7, according to the faraday electromagnetic induction principle, a sensor coil generates current by constant current alternation, so that the sensor generates an alternating magnetic field perpendicular to a measuring pipe, when a conductive liquid moves along the axis of the measuring pipe, the conductive liquid performs cutting magnetic induction line motion to generate electric potential, a converter calculates the corresponding flow velocity V by the magnitude of the electric potential, and then calculates the flow by integrating the time, wherein the induced electric potential is detected by two measuring electrodes and amplified by a converter circuit, and the numerical value is expressed as: e ═ K × B × V × D; wherein E is induced electromotive force; k is an instrument constant; b is magnetic induction intensity; v is the average flow velocity in the cross section of the measurement tube; d is the inner diameter of the measuring tube.
The converter circuit can adopt a digital circuit, such as an existing MSP430 series chip for signal and peripheral processing, and has stable flow rate signal and good measurement effect.
In conclusion, the plug-in type electromagnetic flowmeter sensor realizes plug-in type installation of a flowmeter, can be installed under pressure and overhauled without stopping water, effectively solves the problems that the difficulty of a construction site is increased and the time consumption is increased because the existing flowmeter sensor is limited by a pipe section measuring principle and a whole pipe section needs to be cut and a flange made of a corresponding material is welded, and is convenient to install because a telescopic joint does not need to be installed during installation. Simultaneously, flowmeter sensor's bore needn't be with the pipeline one-to-one, has measurement bore expansibility, measures to different pipe diameter velocity of flow, and the product only needs to increase and connects shell length, can be applicable to multiple measurement pipeline bore requirement, possesses the expansibility of height, reduces the cost input of each link such as production, purchase, storage, transportation and maintenance.
Optionally, an epoxy resin potting compound 13 is potted in a gap between the electrode base 5 and the inside of the housing 12. The fixation of the electrode base 5 and each component inside the shell 12 is ensured through the encapsulating epoxy resin encapsulating glue 13, and the measurement precision of the electromagnetic flowmeter is ensured.
Optionally, the ground electrode 3 is located between the two signal electrodes 1, and has the same distance with the two signal electrodes 1. The grounding electrode 3 is added and is equidistant to the two signal electrodes 1, the reference of zero potential is added, the positive and negative charges of alternating potential are prevented from being accumulated at the electrode ends, and the measurement precision is improved.
Optionally, a magnetizing block 11 is arranged on one end of the coil wheel 9 far away from the electrode base 5. The magnetizing block 11 can be made of DT4 pure iron, so that a good magnetizing effect is achieved, the magnetic field intensity and stability are improved, and the magnetic flux leakage phenomenon is reduced; and, can play certain guard action to coil wheels 9.
Optionally, the ground electrode 3 and the two signal electrodes 1 both use shuttle-type mirror electrodes. By adopting the shuttle-shaped electrode, the flow guide effect is effectively carried out, the disturbance of water flow generated between the electrode tips is reduced, the stability of a flow field is improved, the surface area of the electrode is increased, the acquisition effect of potential signals is improved, the signal stability of each flow velocity section of the product in high, medium and low is improved, and the repeatability and the linearity of the product are improved. And moreover, through mirror surface treatment, the adhesion of dirt and calcifications in the measured liquid is greatly reduced, and the long-term stability and reliability of the product are improved.
Optionally, an electrode sealing ring 2 is disposed between the grounding electrode 3 and one end of the electrode base 5 far away from the outer shell 12, and an electrode sealing ring 4 is disposed between the signal electrode 1 and one end of the electrode base 5 far away from the outer shell 12, and a base sealing ring 4 is disposed at a joint of the electrode base 5 and the outer shell 12. Wherein, the electrode sealing ring 2 and the base sealing ring 4 can adopt O-shaped sealing rings, thereby enhancing the waterproof performance of the electromagnetic flowmeter.
Optionally, the bolt and nut washer set 7; the grounding electrode 3 and the two signal electrodes 1 are both in bolted connection with the electrode base 5 through a bolt and nut gasket group 7, and the coil wheel 9 and the shell 12 are fixed in an interference fit manner through a magnetizing pressing block 11; the outer wall of the end of the shell 12 away from the electrode base 5 is threaded. The extension of the connecting rod is convenient, and the operation difficulty of material preparation in production and field installation requirements is reduced.
Optionally, the OT terminal 6 is disposed on the ground electrode 3, the signal electrode 1 and the inner wall of the housing 12; the OT terminal 6 provided on the ground electrode 3 is used for connecting a ground line 15; an OT terminal 6 provided on the signal electrode 1 for connecting a signal line 16; an OT terminal 6 arranged on the inner wall of the shell 12 is used for connecting a grounding outlet, and a grounding seat 14 used for fixing the OT terminal 6 is further arranged on the inner wall of the shell 12. Through the setting of OT terminal 6, guaranteed the stability that signal line 16 and earth connection 15 are connected with signal electrode 1 and telluric electricity field 3, connect and have connect the processing of gluing to the screw thread mouth, guarantee the connection fastening nature of signal line 16 and earth connection 15, improve long-term stability of product and shock resistance.
Optionally, the ground electrode 3 and the two signal electrodes 1 are made of 316 stainless steel, HC, HB, titanium, tantalum, platinum iridium and the like, and the shell 12 is made of 304 stainless steel; the electrode base 5 is made of PEEK resin and is integrally processed and molded. The electrode base 5 is formed by PEEK resin in one step, has the characteristics of high temperature resistance, corrosion resistance, high strength and good stability, and has good insulativity.
The invention also provides a preparation method of the plug-in electromagnetic flowmeter sensor, which comprises the following steps:
electrode polarization is carried out on the grounding electrode 3 and the two signal electrodes 1; sleeving an electrode seal ring 2 on a grounding electrode 3 and two signal electrodes 1 after electrode polarization, and respectively installing and fastening the grounding electrode 3 and the two signal electrodes in a grounding electrode installation hole and two signal electrode installation holes of an electrode base 5; one ends of a grounding wire 15 and two signal wires 16 are respectively connected with the grounding electrode 3 and the two signal electrodes 1, and the other ends of the grounding wire and the two signal wires pass through the lead tube 8; encapsulating and curing a layer of epoxy resin encapsulating glue 13 on the surface of the electrode base 5; wherein the epoxy resin pouring sealant 13 does not exceed the horizontal plane of the electrode base 5; installing a coil wheel 9 on a lead tube 8, installing a coil 10 on the coil wheel 9, and leading out two excitation wires 17 from two ends of the coil 10; installing the shell 12 and the electrode base 5 in an interference fit manner; a grounding outlet is arranged on the inner wall of the shell 12 and is connected with a grounding wire 15; and (3) straightening the grounding outgoing line, the signal line 16 and the excitation line 17, and potting and curing the casing 12 by more than 5cm by using epoxy resin potting adhesive 13 to obtain the plug-in type electromagnetic flowmeter sensor.
The specific process steps are as follows:
1. placing two signal electrodes 1 and a grounding electrode 3 into a conductive medium, carrying out electrode polarization for 1 hour by accessing 9V alternating direct current voltage, sleeving an electrode sealing ring 2 on the polarized signal electrodes 1 and the grounding electrode 3, placing the two signal electrodes 1 into holes at two sides of an electrode base 5, placing the grounding electrode 3 into a middle hole of the electrode base 5, and fastening by using an M2 nut gasket group 7; and sleeving the base sealing ring 4 into the electrode base 5 to form an electrode kit.
2. Both ends of the three-core shielded wire are stripped, and an OT terminal 6 is installed by using a wire crimper. Sleeving three layers of heat shrinkable tubes, respectively performing heat shrinkage fastening, welding the two signal electrodes 1, the two excitation wires 17 and the outgoing wires of the coil 10 by using a constant-temperature welding table, and respectively performing heat melting fastening by using the three layers of heat shrinkable tubes. One ground wire 15 is led out from the ground electrode 3, two signal wires 16 are led out from the two signal electrodes 1, and two excitation wires 17 are led out from both ports of the coil 10.
3. The signal line 16 and the ground line 15 are led out through the line hole of the lead tube 8. The cable shield of the signal line 16 is connected to the ground electrode 3. And then, encapsulating a layer of epoxy resin pouring sealant 13 on the surface of the electrode base 5, wherein the epoxy resin pouring sealant 13 does not exceed the horizontal plane of the electrode base 5, and carrying out the next step after curing for 3 hours.
4. The coil wheel 9 is passed through the feed-through tube 8 in step 3.
5. Coil 10 is mounted on coil wheel 9 of step 4 with the two drive wires 17 exiting coil 10 up to form the sensor assembly.
6. And (3) installing the shell 12 and the sensor assembly in the step (5) together in an interference fit mode through an extrusion tool, enabling the excitation wire 17 to penetrate through the magnetizing block 11, and installing the magnetizing block 11 on the coil 10 by using the extrusion tool.
7. The ground base 14 is welded on the inner wall of the shell 12 in a point mode, the OT terminal 6 is installed on the grounding wire 15, a new grounding outgoing wire with one end being the OT terminal 6 is manufactured, the two OT terminals 6 are fastened on the grounding base 14 through M2 nuts, the threaded opening is sealed through glue after connection is finished, long-term stability and shock resistance of a product are guaranteed, the grounding outgoing wire, the two excitation wires 17 and the two signal wires 16 are sleeved with three layers of heat shrink tubes and are subjected to hot melting and fastening, and an outgoing wire harness is formed.
8. And straightening the outgoing wire harness, encapsulating the outgoing wire harness by more than 5cm in the shell 12 by adopting epoxy resin encapsulating glue 13, and curing for 3 hours to form a standard product of the plug-in electromagnetic flowmeter sensor.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. An insertion type electromagnetic flowmeter sensor is characterized by comprising an electrode base (5), a grounding electrode (3), a shell (12) and two signal electrodes (1);
the electrode base (5) is connected with the shell (12), and two signal electrode mounting holes and a grounding electrode mounting hole are formed in the electrode base (5); one ends of the two signal electrodes (1) respectively penetrate through the two signal electrode mounting holes and are positioned in the shell (12), and signal wires (16) are arranged at the ends of the two signal electrodes (1); one end of the grounding electrode (3) penetrates through the grounding electrode mounting hole and is positioned in the shell (12), and the grounding wire (15) is arranged on the end of the grounding electrode (3);
a lead tube (8) is arranged in the shell (12), and the signal wire (16) and the grounding wire (15) are led out through the lead tube; a coil wheel (9) is sleeved outside the lead tube, a coil (10) is arranged on the coil wheel (9), and excitation wires (17) are led out from both ends of the coil (10); and a grounding outlet is arranged on the inner wall of the shell (12) and is connected with a grounding wire (15).
2. Plug-in electromagnetic flowmeter sensor according to claim 1, characterized in that the gap between the electrode base (5) and the inside of the housing (12) is potted with an epoxy potting compound (13).
3. An insertion-type electromagnetic flowmeter sensor according to claim 1, characterized in that the ground electrode (3) is located between two signal electrodes (1) and is at the same distance from two signal electrodes (1).
4. The plug-in electromagnetic flowmeter sensor of claim 1, characterized in that the coil wheel (9) is provided with a magnetizing block (11) at the end remote from the electrode base (5).
5. Plug-in electromagnetic flowmeter sensor according to claim 1, characterized in that the ground electrode (3) and both signal electrodes (1) use shuttle-type mirror electrodes.
6. An insertion-type electromagnetic flowmeter sensor according to claim 1, characterized in that an electrode sealing ring (2) is arranged between the grounding electrode (3) and one end of the electrode base (5) far away from the shell (12), and an electrode sealing ring (2) is arranged between the signal electrode (1) and one end of the electrode base (5) far away from the shell (12), and a base sealing ring (4) is arranged at the joint of the electrode base (5) and the shell (12).
7. The plug-in electromagnetic flowmeter sensor of claim 1, further comprising a bolt-and-nut shim pack (7); the grounding electrode (3) and the two signal electrodes (1) are in bolted connection with the electrode base (5) through a bolt and nut gasket group (7), and the coil base (5) is in interference connection with the shell (12); the outer wall of one end of the shell (12) far away from the electrode base (5) is provided with threads.
8. An insertion-type electromagnetic flowmeter sensor according to claim 1, characterized in that the ground electrode (3), the signal electrode (1) and the inner wall of the case (12) are provided with OT terminals (6); an OT terminal (6) arranged on the grounding electrode (3) is used for connecting a grounding wire (15); an OT terminal (6) provided on the signal electrode (1) for connecting a signal line (16); an OT terminal (6) arranged on the inner wall of the shell (12) is used for connecting a grounding outlet, and a grounding seat (14) used for fixing the OT terminal (6) is also arranged on the inner wall of the shell (12).
9. An insertion-type electromagnetic flowmeter sensor according to claim 1, characterized in that the ground electrode (3) and both signal electrodes (1) are of 316 stainless steel, and the housing (12) is of 304 stainless steel; the electrode base (5) is made of PEEK resin and is integrally processed and molded.
10. A method of making an insertion-type electromagnetic flow meter sensor of claim 1, comprising the steps of:
electrode polarization is carried out on the grounding electrode (3) and the two signal electrodes (1); after sleeving an electrode sealing ring (2) on a grounding electrode (3) and two signal electrodes (1) after electrode polarization, respectively installing the grounding electrode and the two signal electrodes in a grounding electrode installation hole and two signal electrode installation holes of an electrode base (5) and fastening the grounding electrode and the two signal electrodes;
one ends of a grounding wire (15) and two signal wires (16) are respectively connected with the grounding electrode (3) and the two signal electrodes (1), and the other ends of the grounding wire and the two signal wires penetrate through the lead tube (8);
encapsulating and curing a layer of epoxy resin encapsulating glue (13) on the surface of the electrode base (5); wherein the epoxy resin pouring sealant (13) does not exceed the horizontal plane of the electrode base (5); a coil wheel (9) is arranged on a lead tube (8), a coil (10) is arranged on the coil wheel (9), and two excitation wires (17) are led out from two ends of the coil (10); installing the shell (12) and the electrode base (5) in an interference fit manner; a grounding outlet is arranged on the inner wall of the shell (12) and is connected with a grounding wire (15);
and straightening the grounding outgoing line, the signal line (16) and the excitation line (17), and encapsulating and curing the shell (12) by more than 5cm by adopting epoxy resin encapsulating glue (13) to obtain the plug-in type electromagnetic flowmeter sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482080.5A CN114111926A (en) | 2021-12-06 | 2021-12-06 | Plug-in type electromagnetic flowmeter sensor and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482080.5A CN114111926A (en) | 2021-12-06 | 2021-12-06 | Plug-in type electromagnetic flowmeter sensor and preparation method thereof |
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| CN114111926A true CN114111926A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111482080.5A Pending CN114111926A (en) | 2021-12-06 | 2021-12-06 | Plug-in type electromagnetic flowmeter sensor and preparation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2112804U (en) * | 1991-07-15 | 1992-08-12 | 天津市自动化仪表三厂 | Plug-in type electromagnetic flow sensor |
| JPH06102071A (en) * | 1992-09-18 | 1994-04-12 | Hitachi Ltd | Adhesive partition plate for electromagnetic flowmeter |
| JP2000260748A (en) * | 1999-03-02 | 2000-09-22 | Applied Materials Inc | Semiconductor manufacturing equipment |
| CN203132614U (en) * | 2013-03-19 | 2013-08-14 | 开封开流仪表有限公司 | Integrated plug-in battery powered electromagnetic flowmeter |
| CN111256767A (en) * | 2020-03-17 | 2020-06-09 | 深圳市佳运通电子有限公司 | Precise water injection flow meter for oil field water injection well |
| CN211554050U (en) * | 2020-03-25 | 2020-09-22 | 杭州蚁联传感科技有限公司 | Intelligent electromagnetic flow velocity sensor |
| CN213041293U (en) * | 2020-06-16 | 2021-04-23 | 江苏华海测控技术有限公司 | Plug-in electromagnetic sensor |
-
2021
- 2021-12-06 CN CN202111482080.5A patent/CN114111926A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2112804U (en) * | 1991-07-15 | 1992-08-12 | 天津市自动化仪表三厂 | Plug-in type electromagnetic flow sensor |
| JPH06102071A (en) * | 1992-09-18 | 1994-04-12 | Hitachi Ltd | Adhesive partition plate for electromagnetic flowmeter |
| JP2000260748A (en) * | 1999-03-02 | 2000-09-22 | Applied Materials Inc | Semiconductor manufacturing equipment |
| CN203132614U (en) * | 2013-03-19 | 2013-08-14 | 开封开流仪表有限公司 | Integrated plug-in battery powered electromagnetic flowmeter |
| CN111256767A (en) * | 2020-03-17 | 2020-06-09 | 深圳市佳运通电子有限公司 | Precise water injection flow meter for oil field water injection well |
| CN211554050U (en) * | 2020-03-25 | 2020-09-22 | 杭州蚁联传感科技有限公司 | Intelligent electromagnetic flow velocity sensor |
| CN213041293U (en) * | 2020-06-16 | 2021-04-23 | 江苏华海测控技术有限公司 | Plug-in electromagnetic sensor |
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