Electromagnetic flowmeter

Abstract

The embodiment of the invention relates to the field of flow measurement, and discloses an electromagnetic flow meter which comprises a shell defining a main channel, and the side wall of the shell is provided with two symmetrically-distributed side channels communicating with the main channel; the liner tube is arranged in the main channel of the shell in a penetrating manner, and a through hole corresponding to the side channel is formed in the side wall of the liner tube; the electrode assembly is inserted into the side channel and the through hole; wherein the electrode assembly comprises a liquid receiving electrode and a solid electrode, the first end of the solid electrode is arranged in a way of avoiding the flow channel of the liner tube, and the first end of the liquid receiving electrode is positioned in the flow channel of the liner tube so as to receive and transmit a signal of induced electromotive force generated by the measured liquid flowing in the liner tube to the solid electrode. The liquid receiving electrode collects signals and transmits the signals to the solid electrode, and the liquid receiving electrode and the solid electrode cooperate to ensure the stability in the signal transmission process and reduce signal attenuation and distortion; the problem that when a traditional electromagnetic flowmeter measures liquid containing particles, the particles impact an electrode to generate noise, and consequently measurement is difficult is solved.

Description

Technical Field

[0001] The present application relates to the field of flow measurement technology, and in particular to an electromagnetic flowmeter. Background Art

[0002] Electromagnetic flowmeters typically measure conductive liquids. Electromagnetic flowmeters use an insulated measuring tube with two electrodes on its inner wall to measure the induced potential signal proportional to the average flow velocity. These electrodes are typically made of solid metals such as stainless steel. To ensure optimal contact with the fluid, the electrode end faces are typically designed to be at least 20 degrees below the inner wall of the measuring tube. When particles are present in the fluid, they inevitably collide with the electrode end faces. This creates significant jumps in the electrode interface potential. This noise significantly reduces the signal-to-noise ratio (SNR) of the electromagnetic flowmeter sensor electrode signal. This makes it difficult for conventional electromagnetic flowmeters to measure the flow of slurries containing particles, such as pulp, mud, and mortar. Summary of the Invention

[0003] One object of the present application is to provide an electromagnetic flowmeter that at least solves the problem that particles colliding with solid electrodes will generate noise on the electrode signal.

[0004] To achieve the above objectives, some embodiments of the present application provide an electromagnetic flowmeter, including:

[0005] The shell encloses a main channel, and the side wall is constructed with two symmetrically distributed side channels connected to the main channel;

[0006] A liner is installed in the main channel of the shell, and a through hole corresponding to the side channel is configured on the side wall of the liner;

[0007] an electrode assembly, inserted into the side channel and the through hole;

[0008] Among them, the electrode assembly includes a liquid electrode and a solid electrode, and the first end of the solid electrode is set to avoid the flow channel of the liner tube. The first end of the liquid electrode is located in the flow channel of the liner tube to receive and transmit the signal of the induced electromotive force generated by the measured liquid flowing in the liner tube to the solid electrode.

[0009] In some embodiments, the outer circumferential surface of the liner is configured with external threads, and the inner annular surface of the main channel is configured with internal threads, and the external threads are threadedly connected to the internal threads so that the liner is fixedly connected to the main channel and sealed.

[0010] In some embodiments, the outer peripheral surface of the liner is configured with a plurality of annular grooves for mounting a sealing ring;

[0011] There are at least two annular grooves respectively located at two ends of the external thread.

[0012] In some embodiments, the length of the liner is shorter than the length of the shell, and both ends are fixed and sealed by port clamping rings;

[0013] The outer diameter of the liner is smaller than the outer diameter of the port sealing ring and larger than the inner diameter of the port sealing ring.

[0014] In some embodiments, the electrode assembly further comprises:

[0015] The housing defines a receiving cavity for accommodating the solid electrode and the liquid electrode;

[0016] Injection molding part, which is integrally injection molded with the housing, solid electrode and liquid-contacting electrode;

[0017] The solid electrode and the liquid-contacting electrode are arranged in parallel, the injection molding part wraps the first end of the solid electrode, and the first end of the liquid-contacting electrode is exposed outside the injection molding part.

[0018] In some embodiments, the inner annular surface of the side channel is stepped, including a first channel segment and a second channel segment, and the cross-sectional area of the first channel segment is greater than the cross-sectional area of the second channel segment;

[0019] The through hole of the liner is adapted to the second channel section.

[0020] In some embodiments, the injection-molded portion of the electrode assembly is configured with an annular protrusion protruding radially outward from the outer peripheral surface, and the annular protrusion is located at abutment against the bottom wall of the outer shell and the first channel section.

[0021] In some embodiments, the wall of the housing accommodating cavity is constructed with a plurality of limiting grooves, so that parts of the injection-molded part are embedded in the limiting grooves to prevent them from falling off.

[0022] In some embodiments, the outer peripheral surface of the housing is configured with one or more circumferentially arranged sealing grooves for mounting a sealing ring.

[0023] In some embodiments, further comprising:

[0024] A locking member is provided in the main channel to fix the electrode assembly;

[0025] The locking piece is a hollow structure so that the wires of the electrode assembly can pass through.

[0026] Compared with the related art, in the solution provided by the embodiment of the present application, the fluid first flows in the liner tube inside the shell, thereby generating an induced electromotive force. The signal is collected by the liquid electrode of the electrode assembly and transmitted to the solid electrode for processing, and finally the flow data is obtained. The various parts work together to achieve flow measurement. The first end of the liquid electrode is located in the liner tube flow channel, which can fully contact the measured liquid and can efficiently receive the induced electromotive force signal generated by its flow. The first end of the solid electrode avoids the liner tube flow channel to avoid direct impact of the fluid, reduce the interference of particle noise on the signal, ensure that the signal collected by the liquid electrode is stable and accurate, and thus improve the accuracy of the electromagnetic flowmeter in measuring flow.

[0027] Electromagnetic flowmeters can measure a variety of conductive liquids, such as slurries containing particles. This solves the problem of traditional electromagnetic flowmeters having difficulty measuring such liquids due to noise generated by particles hitting the electrodes, thus broadening the application scope of electromagnetic flowmeters. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 is a schematic cross-sectional structural diagram of an electromagnetic flowmeter provided by an embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of a partial structure of a housing provided in an embodiment of the present disclosure;

[0031] Figure 3 is a schematic cross-sectional structural diagram of an electrode assembly provided in an embodiment of the present disclosure;

[0032] Figure 4 It is a schematic diagram of the half-section structure of the liner provided in an embodiment of the present disclosure.

[0033] Reference numerals:

[0034] 10: housing; 101: main channel; 102: side channel; 1021: first channel section; 1022: second channel section; 103: flange structure;

[0035] 20: liner; 201: flow channel; 202: through hole; 203: external thread; 204: ring groove;

[0036] 30: electrode assembly; 301: liquid electrode; 3011: first end of liquid electrode; 302: solid electrode; 3021: first end of solid electrode; 303: housing; 3031: limiting groove; 3032: sealing groove; 304: injection molding part; 3041: annular protrusion;

[0037] 40: port clamping ring;

[0038] 50: locking piece;

[0039] 60: Integrator. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0044] Unless otherwise stated, the term "plurality" means two or more.

[0045] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0046] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0047] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0048] Combine Figures 1 to 4 As shown, an electromagnetic flowmeter provided by an embodiment of the present disclosure includes: a shell 10, a liner 20 and an electrode assembly 30.

[0049] The shell 10 encloses a main channel 101, and the side wall is constructed with two symmetrically distributed side channels 102 connected to the main channel 101; the liner 20 is installed in the main channel 101 of the shell 10, and the side wall of the liner 20 is constructed with through holes 202 corresponding to the side channels 102; the electrode assembly 30 is inserted into the side channel 102 and the through holes 202; wherein, the electrode assembly 30 includes a liquid-contacting electrode 301 and a solid electrode 302, and the first end 3021 of the solid electrode is arranged to avoid the flow channel 201 of the liner 20, and the first end 3011 of the liquid-contacting electrode is located in the flow channel 201 of the liner 20 to receive and transmit the signal of the induced electromotive force generated by the measured liquid flowing in the liner 20 to the solid electrode 302.

[0050] Using the electromagnetic flowmeter provided by the embodiment of the present disclosure, the fluid first flows in the liner 20 in the shell 10, thereby generating an induced electromotive force. The signal is collected by the liquid electrode 301 of the electrode assembly 30 and transmitted to the solid electrode 302 for processing, and finally the flow data is obtained. The various parts work together to achieve flow measurement. The symmetrically distributed side channels 102 and the corresponding through holes 202 of the liner 20 ensure the accuracy and stability of the installation position of the electrode assembly 30, which is conducive to improving the reliability of signal reception and laying the foundation for accurate flow measurement. Compared with traditional electromagnetic flowmeters, this structure optimizes the signal acquisition method, reduces signal interference caused by unreasonable structural design, and thus improves measurement accuracy; in addition, the first end of the liquid electrode 301 is located in the flow channel 201 of the liner 20, can fully contact the liquid to be measured, and can efficiently receive the induced electromotive force signal generated by its flow. The first end of the solid electrode 302 avoids the flow channel 201 of the liner 20 to avoid direct impact of the fluid, reduce the interference of particle noise on the signal, ensure that the signal collected by the liquid electrode 301 is stable and accurate, thereby improving the accuracy of the electromagnetic flowmeter in measuring flow.

[0051] The electromagnetic flowmeter of this embodiment has been modified from a single electrode on one side to multiple electrodes on one side, including a liquid electrode 301 and a solid electrode 302. The liquid electrode 301 partially contacts the liquid to be measured within the liner 20. The liquid electrode 301 comprises several channels extending from the sidewall of the liner 20 to corresponding solid electrodes 302. These channels are filled with a conductive liquid. The conductive liquid in the liquid electrode 301 can be the liquid formed by the fluid to be measured being injected and retained. This prevents the measured liquid from directly contacting the solid electrode 302 as it flows within the liner 20, making the signal output by the solid electrode 302 virtually free of noise caused by particles. Furthermore, the induced potential generated by the measured liquid within the liner 20 can be transmitted to the solid electrode 302 via the liquid electrode 301. The electromagnetic flowmeter's signal measurement unit is connected to the solid electrode 302 to measure the induced potential signal generated by the flow of the measured liquid. This enables electromagnetic flowmeters to measure a variety of conductive liquids, such as slurries containing particles, solving the problem of traditional electromagnetic flowmeters having difficulty measuring such liquids due to noise generated by particles hitting the electrodes, and broadening the application range of electromagnetic flowmeters.

[0052] The liquid electrode 301 collects the signal and transmits it to the solid electrode 302. The two work together to ensure the stability of the signal transmission process, reduce signal attenuation and distortion, and provide a reliable signal basis for subsequent accurate flow calculation.

[0053] The liquid-contacting electrode 301 and the solid electrode 302 are stacked in series to form the conductive medium being measured. Injection-molded pressure-resistant insulating material is used between the housing 303 and the two electrodes to ensure insulation strength. When the fluid passes through the liner 20, it hardly impacts the solid electrode 302, thus preventing particle noise from being generated on the solid electrode 302 and preventing potential jumps on the electrode surface.

[0054] The electromagnetic flowmeter of this embodiment has a simple structure and reliable operation, can improve the signal-to-noise ratio of the electromagnetic flowmeter at a lower excitation frequency, and can achieve stable flow measurement of various types of liquids with particles at a low excitation frequency.

[0055] It should be noted that the liner 20 in this embodiment is a high-pressure liner 20, which can be used in high-pressure environments.

[0056] The operating principle of an electromagnetic flowmeter is based on the fact that when a conductor cuts through magnetic lines of force in a magnetic field, an induced potential is generated in the conductor. The magnitude of this induced potential is proportional to the effective length of the conductor in the magnetic field and the speed at which the conductor moves perpendicular to the magnetic field. Similarly, when a conductive fluid flows perpendicularly in a magnetic field and cuts through magnetic lines of force, an induced potential is generated on the electrode assemblies 30 on both sides of the main channel 101, generating a pulse signal. This pulse signal is processed by the sensor and converted into an electrical signal. This electrical signal is then processed by the integrator 60 to display the instantaneous and accumulated values of the measured fluid flow rate, thereby obtaining the flow rate value.

[0057] The measured fluid enters the main channel 101 of the electromagnetic flowmeter's housing 10 under the influence of pressure differentials and other factors. Since the main channel 101 runs through the housing 10 and is coaxial with the housing 10, it provides a stable and smooth flow path for the fluid, reducing turbulence and resistance, and ensuring that the fluid passes through at a relatively stable flow rate.

[0058] According to the principle of electromagnetic induction, when a conductive fluid flows perpendicularly in a magnetic field and cuts through the magnetic induction lines of force, an induced electromotive force is generated. During operation of the electromagnetic flowmeter, the conductive fluid flowing within the liner 20 acts as a conductor that cuts through the magnetic induction lines of force. This generates an induced electromotive force on the electrode assemblies 30 on either side of the main channel 101, and the magnitude of this electromotive force is related to factors such as the fluid flow rate.

[0059] The liquid-wetted electrode 301 in the electrode assembly 30 plays a key role. Its first end 3011, located within the liner 20, directly contacts the liquid being measured, effectively receiving the induced electromotive force signal generated by the flow of the measured liquid. The liquid-wetted electrode 301 and the solid electrode 302 are arranged parallel to each other within the housing 303. Signals received by the liquid-wetted electrode 301 are transmitted to the solid electrode 302 via the internal conductive structure, achieving initial signal transmission.

[0060] Solid electrode 302 further transmits the received signal to the electromagnetic flowmeter's signal measurement unit (e.g., integrator 60). Integrator 60 processes these induced electromotive force signals and, based on the relationship between induced electromotive force and fluid flow rate as defined by the law of electromagnetic induction, combines pre-set parameters and algorithms to calculate the instantaneous and cumulative values of the measured liquid flow rate. These flow rate data are then displayed, allowing operators to monitor the fluid flow rate in real time. It should be noted that the signal measurement unit (e.g., integrator 60) herein is conventional technology and can be implemented by those skilled in the art.

[0061] The shell 10 encloses the main channel 101, and its structure affects the flow state of the fluid. The main channel 101 runs through the shell 10 and is coaxially arranged with the shell 10, so that the fluid flows smoothly, turbulence is reduced, and the flow rate is stable, providing a stable fluid environment for the electrode assembly 30 to accurately receive signals. If the structural design of the shell 10 is unreasonable, resulting in turbulent fluid flow, the induced electromotive force signal received by the electrode assembly 30 will be unstable, thereby affecting signal conduction and measurement accuracy. In addition, the flange structure 103 at both ends of the shell 10 is convenient for installation, ensuring that the electromagnetic flowmeter is tightly connected to the pipeline system, preventing fluid leakage, and avoiding interference with signal conduction caused by changes in the measurement environment due to leakage.

[0062] The liner 20 is made of insulating material to avoid current leakage during the measurement process, prevent signal interference caused by leakage, and improve the signal-to-noise ratio of the signal. The wall thickness of the liner 20 is less than the side wall thickness of the main channel 101 of the shell 10. While ensuring the electromagnetic induction sensitivity, it also ensures the strength and rigidity of the shell 10 and avoids the impact of problems with the liner 20 on signal conduction. The structural design of the liner 20, such as the number, position and size of the through holes 202 in the side wall structure, affects the installation position of the electrode assembly 30 and the contact effect with the liquid to be measured. The two symmetrically distributed through holes 202 provide a precise installation position for the electrode assembly 30, so that the liquid-contacting electrode 301 can better receive the induced electromotive force signal.

[0063] Optionally, a side channel 102 is provided in the middle of the main channel 101. Similarly, a through hole 202 is provided in the middle of the liner 20 to communicate with the flow channel 201, as well as sealing threads and high-pressure sealing rings on both sides of the through hole 202. This not only ensures the sealing performance under high-pressure environment and prevents fluid leakage, but also provides a stable installation environment for the electrode assembly 30, reducing the interference of external factors on signal transmission. In addition, the liner 20 is a high-pressure liner 20, which is squeezed by the inner cavity of the shell 10 and can achieve a good overall sealing effect, ensuring the sealing of the high-pressure pressurized fluid to be measured, and avoiding the influence of fluid leakage on the electrode assembly 30 and signal transmission. If the seal of the high-pressure liner 20 fails, fluid leakage may cause the electrode assembly 30 to short-circuit, causing signal confusion and inability to conduct and measure normally.

[0064] Optionally, the main channel 101 passes through the housing 10 and is coaxially arranged with the housing 10 .

[0065] Main channel 101 extends through housing 10 and is coaxial with it, ensuring smoother fluid flow within the housing 10 and reducing resistance and turbulence. This structural design helps maintain a stable fluid flow rate, avoiding flow rate fluctuations caused by channel irregularities, thereby improving the accuracy of the electromagnetic flowmeter's measurements. Furthermore, the coaxial arrangement makes it easier to ensure precision during processing and assembly, reducing manufacturing complexity and costs, and enhancing product consistency and stability.

[0066] Optionally, the axis of the side channel 102 is perpendicular to the axis of the main channel 101. Preferably, the liquid electrode 301 is parallel to the axis of the side channel 102. In this way, the liquid electrode 301 is vertically inserted into the main channel 101.

[0067] The side channel 102 is arranged perpendicular to the main channel 101, and the liquid electrode 301 is inserted vertically into the main channel 101. This layout allows the liquid electrode 301 to maximize contact with the measured liquid, effectively improving the efficiency of receiving the induced electromotive force signal. The vertical insertion method avoids the problem of uneven signal reception caused by electrode tilt, ensuring signal integrity and accuracy. In addition, this structural design is more rational in space utilization, enabling efficient signal acquisition within the limited housing 10, and improving the overall performance of the electromagnetic flowmeter.

[0068] Optionally, flange structures 103 are formed at both ends of the housing 10 for easy assembly. Preferably, the diameter of the flange structure 103 is larger than the outer diameter of the housing 10 .

[0069] The flange structures 103 at each end of the housing 10 greatly facilitate the installation and removal of the electromagnetic flowmeter. In actual use, the flange connection allows for quick and stable integration of the electromagnetic flowmeter into the piping system, improving installation efficiency. Furthermore, the flange connection offers excellent sealing and stability, effectively preventing fluid leakage and ensuring the proper functioning of the electromagnetic flowmeter under various operating conditions. Furthermore, the flange structure 103 is highly versatile and can be connected to a variety of standard pipes, expanding the product's applicability.

[0070] Furthermore, the diameter of flange structure 103 is larger than the outer diameter of housing 10, providing a larger connection area and greater tightening force. When connecting pipes, the larger flange diameter disperses the force acting on the connecting bolts, reducing localized stress concentration and improving connection reliability. Furthermore, this design increases the installation area for the sealing gasket, further enhancing the sealing effect and preventing fluid leakage from the connection, thus ensuring the normal operation of the electromagnetic flowmeter under harsh operating conditions such as high pressure and high corrosion.

[0071] Optionally, the wall thickness of the liner 20 is smaller than the side wall thickness of the main channel 101 of the shell 10 .

[0072] The thinner wall of the liner 20 reduces the overall weight of the electromagnetic flowmeter and lowers material costs. Furthermore, a thinner liner 20 improves the sensitivity of electromagnetic induction, as an excessively thick liner 20 may shield the induced electromotive force signal. The thicker sidewalls of the main channel 101 of the housing 10 ensure the strength and rigidity of the housing 10, making it less susceptible to deformation when subjected to high-pressure fluids and ensuring stable operation of the electromagnetic flowmeter under varying pressure environments.

[0073] Optionally, the liner 20 is made of insulating material.

[0074] The insulating material used in the liner 20 effectively prevents current leakage during measurement, ensuring the accuracy of the electromagnetic flowmeter. The insulating liner 20 isolates the measured liquid from metal components such as the housing 10, preventing signal interference caused by leakage and improving the signal-to-noise ratio. Furthermore, the insulating material exhibits a certain degree of corrosion resistance, protecting the internal structure of the electromagnetic flowmeter from erosion by the measured liquid and extending the product's service life.

[0075] Optionally, the side wall of the liner 20 is configured with two through holes 202 .

[0076] The two through-holes 202 in the sidewall of the liner 20 cooperate with the side channels 102 of the housing 10 to provide precise positioning for the installation of the electrode assemblies 30. The symmetrical distribution of the two through-holes 202 enables the two electrode assemblies 30 to evenly receive the induced electromotive force signal, improving measurement accuracy and stability. This design also facilitates inspection and replacement of the electrode assemblies 30 during installation and maintenance, enhancing the maintainability of the product.

[0077] Optionally, an electrode assembly 30 is inserted into each side channel 102 and through hole 202. That is, the electromagnetic flowmeter includes two electrode assemblies 30, and both electrode assemblies 30 are connected to the integrator 60 through wires for calculation. Figure 1 The curve connecting the middle electrode assembly and the integrator is the wire.

[0078] Using two electrode assemblies 30 for signal acquisition improves measurement accuracy and reliability by comparing and analyzing the signals received by the two electrodes. Simultaneously operating, the two electrode assemblies 30 can mutually verify and complement each other's signals, reducing measurement errors caused by single electrode failure or signal interference. Furthermore, connected to the integrator 60 via wires, the induced electromotive force signal can be quickly and accurately converted into flow data, enabling real-time monitoring and calculation of fluid flow.

[0079] Optionally, the liquid-contacting electrodes 301 in the two electrode assemblies 30 are arranged correspondingly.

[0080] The corresponding arrangement of the liquid electrodes 301 ensures that the two liquid electrodes 301 are in the same measurement environment when receiving the induced electromotive force signal, reducing measurement errors caused by positional differences. This corresponding arrangement ensures that the two liquid electrodes 301 sense the fluid flow rate more consistently, improving the accuracy and repeatability of the measurement results and facilitating more precise measurement of fluid flow.

[0081] Optionally, the liquid-contacting electrodes 301 in the two electrode assemblies 30 are symmetrically arranged.

[0082] The symmetrical arrangement of the liquid-contacting electrodes 301 further optimizes signal acquisition uniformity. This symmetrical structure ensures a more balanced response to the fluid during measurement, avoiding measurement deviations caused by asymmetric electrode placement. This symmetrical design not only improves measurement accuracy but also enhances the electromagnetic flowmeter's adaptability to varying flow rates and flow rates, ensuring accurate flow measurement in a variety of complex situations.

[0083] Optionally, the outer circumferential surface of the liner 20 is configured with an external thread 203, and the inner annular surface of the main channel 101 is configured with an internal thread. The external thread 203 is threadedly connected to the internal thread so that the liner 20 and the main channel 101 are fixedly connected and sealed.

[0084] The liner 20 is threadedly connected to the main channel 101, making installation and removal quick and easy, and facilitating maintenance or replacement of the liner 20. This threaded connection provides a reliable fixation, ensuring a stable position of the liner 20 within the main channel 101 and resisting displacement. Furthermore, with appropriate tightening force, the threaded connection achieves a good seal, preventing fluid leakage and ensuring the tightness and stability of the electromagnetic flowmeter during operation.

[0085] Optionally, the external thread 203 may be located between the end of the liner 20 and the through hole 202 on its side wall. In this way, two sections of external threads 203 are provided on the outer circumference of the liner 20. Preferably, the two sections of external threads 203 are symmetrically arranged so that the liner 20 is evenly stressed.

[0086] The two external threads 203 are symmetrically arranged on the liner 20, ensuring a more even distribution of force when connected to the main channel 101, preventing deformation or damage to the liner 20 due to uneven force distribution. This even distribution of force improves the stability and reliability of the connection between the liner 20 and the main channel 101, enhancing the sealing effect and further reducing the risk of fluid leakage. Furthermore, this design can significantly extend the service life of the liner 20 and reduce maintenance costs.

[0087] Optionally, the outer circumferential surface of the liner 20 is interference fit with the inner annular surface of the main channel 101 .

[0088] The interference fit provides a tight connection, strengthening the bond between the liner 20 and the main channel 101 and preventing the liner 20 from loosening or shifting within the main channel 101. The interference fit offers excellent sealing performance, effectively preventing fluid leakage between the liner 20 and the main channel 101, ensuring the proper functioning of the electromagnetic flowmeter under harsh operating conditions such as high pressure. Furthermore, the interference fit reduces the impact of vibration and other factors on the electromagnetic flowmeter's measurement accuracy, thereby improving measurement stability.

[0089] Optionally, the outer peripheral surface of the liner 20 is configured with a plurality of annular grooves 204 for installing a sealing ring; wherein, at least two annular grooves 204 are respectively located at both ends of the external thread 203 .

[0090] Annular grooves 204 are provided on the outer circumference of the liner 20 to accommodate sealing rings, further enhancing the seal between the liner 20 and the main channel 101. The sealing rings located at both ends of the external threads 203 effectively prevent fluid leakage from the threaded connection, improving the sealing and waterproof performance of the electromagnetic flowmeter. The design of multiple annular grooves 204 allows for the selection of an appropriate number of sealing rings for installation based on different operating conditions and sealing requirements, increasing the product's applicability and flexibility.

[0091] It should be noted that sealing rings are required at both ends of the liner 20. The at least two annular grooves 204 are located at both ends of the external thread 203, indicating that the sealing rings are sleeved on the liner 20 and not at the ends.

[0092] Optionally, the length of the liner 20 is smaller than the length of the shell 10, and both ends are fixed and sealed by port clamping rings 40; wherein, the outer diameter of the liner 20 is smaller than the outer diameter of the port sealing ring and larger than the inner diameter of the port sealing ring.

[0093] The liner 20 is shorter than the housing 10 and is sealed at both ends by port clamps 40. This structural design facilitates installation and removal of the liner 20, improving product maintainability. The port clamps 40 provide uniform compression, ensuring a tight seal between the liner 20 and the housing 10, preventing fluid leakage. The outer diameter of the liner 20 matches the size of the port seal, ensuring a tight fit between the liner 20 and the port seal, further enhancing sealing performance and ensuring the electromagnetic flowmeter operates properly under various operating conditions.

[0094] Optionally, the electrode assembly 30 also includes: a shell 303, which encloses a accommodating cavity; a solid electrode 302, which is arranged parallel to the liquid-contacting electrode 301, and both the solid electrode 302 and the liquid-contacting electrode 301 are inserted into the accommodating cavity of the shell 303; an injection molding part 304, which is integrally injection-molded with the shell 303, the solid electrode 302 and the liquid-contacting electrode 301; wherein the injection molding part 304 wraps the first end 3021 of the solid electrode, and the first end 3011 of the liquid-contacting electrode is exposed to the outside of the injection molding part 304.

[0095] The integral injection-molded structure strengthens the connections between the various components of the electrode assembly 30, enhancing overall stability and reliability. The molded portion 304 wraps around one end of the solid electrode, protecting it from environmental corrosion and extending its service life. The exposed first end 3011 of the liquid-contacting electrode facilitates full contact with the measured liquid, effectively receiving the induced electromotive force signal and improving signal acquisition efficiency and accuracy.

[0096] The injection molded portion 304 is made of insulating and high-voltage-resistant material.

[0097] Optionally, when the housing 303 is provided in the side channel 102 , a seal is provided between the housing 303 and the side channel 102 .

[0098] The sealed arrangement of the housing 303 and the side channel 102 prevents fluid from entering the interior of the electrode assembly 30, avoiding the risk of damage to the electrode assembly 30 due to fluid erosion and ensuring the normal operation of the electrode assembly 30. Good sealing performance also reduces interference from the external environment on the signal acquisition of the electrode assembly 30, improving the accuracy and stability of the electromagnetic flowmeter's measurement.

[0099] Optionally, the inner annular surface of the side channel 102 is stepped, including a first channel section 1021 and a second channel section 1022, and the cross-sectional area of the first channel section 1021 is larger than the cross-sectional area of the second channel section 1022; wherein the through hole 202 of the liner 20 is adapted to the second channel section 1022.

[0100] The stepped design of the side channel 102 ensures a more stable installation of the electrode assembly 30. The larger cross-sectional area of the first channel section 1021 accommodates components such as the housing 303 of the electrode assembly 30. The second channel section 1022 mates with the through-hole 202 of the liner 20, ensuring a tight fit between the electrode assembly 30 and the liner 20, improving installation accuracy and stability. This structural design also helps optimize the flow of fluid within the side channel 102, reducing impact on the electrode assembly 30 and further enhancing measurement accuracy.

[0101] In addition, during the assembly process, the stepped design can be used to improve the positioning of the electrode assembly 30 and ensure the depth of the electrode assembly 30 inserted into the side channel 102, thereby improving the assembly accuracy and efficiency.

[0102] Optionally, the injection molding portion 304 is configured with an annular protrusion 3041 protruding radially outward from the outer peripheral surface, and the annular protrusion 3041 is located so as to abut against the bottom wall of the outer shell 303 and the first channel section 1021 .

[0103] The annular protrusion 3041 of the injection molded portion 304 abuts against the housing 303 and the bottom wall of the first channel section 1021, strengthening the fixation of the electrode assembly 30 within the side channel 102 and preventing displacement of the electrode assembly 30 during operation. The design of the annular protrusion 3041 also provides a certain sealing effect, further preventing fluid from entering the interior of the electrode assembly 30, protecting the electrode assembly 30 from fluid erosion, and improving the reliability and stability of the electromagnetic flowmeter.

[0104] Optionally, the inner wall of the accommodating cavity of the shell 303 is constructed with a plurality of limiting grooves 3031 for partially embedding the injection molded part 304 in the limiting grooves 3031 to prevent it from falling off.

[0105] The provision of the retaining grooves 3031 further secures the connection between the injection molding portion 304 and the housing 303, effectively preventing the injection molding portion 304 from falling out of the housing 303 cavity. The multiple retaining grooves 3031 evenly distribute the forces acting on the injection molding portion 304, enhancing the overall structural strength and stability of the electrode assembly 30. This design ensures that the relative positions of the various components of the electrode assembly 30 remain unchanged when the electromagnetic flowmeter is subjected to vibration or impact, thus ensuring accurate signal acquisition.

[0106] Optionally, the plurality of limiting grooves 3031 may be evenly spaced to improve the force uniformity between the housing 303 and the injection molding portion 304 and ensure the overall structural strength of the housing 303 .

[0107] The evenly distributed limiting grooves 3031 ensure a more balanced force distribution on the injection molded portion 304 within the housing 303, preventing deformation or damage to the injection molded portion 304 due to uneven force distribution. Furthermore, the evenly distributed limiting grooves 3031 enhance the overall structural strength of the housing 303, preventing it from cracking or deforming when subjected to external forces. This ensures the proper functioning of the electrode assembly 30 and increases the reliability and service life of the electromagnetic flowmeter.

[0108] Optionally, the cross section of the limiting groove 3031 may be a rectangular structure, a triangular structure, a circular structure, etc.

[0109] Different shapes of limit slots 3031 can be selected based on actual production and usage requirements. Rectangular limit slots 3031 are easy to process and manufacture, providing a good position-limiting effect; triangular limit slots 3031 ensure position limiting while also enhancing structural stability; and circular limit slots 3031 help reduce stress concentration and increase component fatigue life. The diverse shape designs of limit slots 3031 increase product flexibility and applicability, meeting the requirements of different working conditions.

[0110] Optionally, the outer peripheral surface of the housing 303 is configured with one or more circumferentially arranged sealing grooves 3032 for installing a sealing ring.

[0111] Sealing rings are installed in the sealing grooves 3032 on the outer surface of the housing 303, further strengthening the seal between the housing 303 and the side channel 102, effectively preventing fluid leakage. Multiple sealing grooves 3032 can be installed with different numbers of sealing rings to meet different sealing requirements, improving the product's adaptability to different operating conditions. This excellent sealing performance helps protect the electrode assembly 30 from external environmental influences, ensuring the measurement accuracy and stability of the electromagnetic flowmeter.

[0112] Optionally, the sealing ring protrudes from the opening of the sealing groove 3032 .

[0113] Optionally, the limiting groove 3031 and the sealing groove 3032 are staggered to ensure the structural strength of the housing 303 .

[0114] The staggered positioning of the limiting grooves 3031 and the sealing grooves 3032 avoids the problem of reduced structural strength caused by excessive grooves in the housing 303. This rational layout design ensures the fixing effect of the injection molding portion 304 and the sealing performance between the housing 303 and the side channel 102, while maintaining the overall structural strength of the housing 303. This enables the electromagnetic flowmeter to withstand various external forces during long-term use and is less susceptible to damage, thereby improving the product's reliability and service life.

[0115] Optionally, it further includes: a locking member 50, which is provided in the main channel 101 to fix the electrode assembly 30; wherein the locking member 50 is a hollow structure so that the wire of the electrode assembly 30 can pass through.

[0116] The locking member 50 further secures the electrode assembly 30 within the main channel 101, preventing displacement or loosening during operation. The hollow design facilitates the passage of the wires through the electrode assembly 30, preventing them from being squeezed or damaged during installation and use, and ensuring stable signal transmission. The use of the locking member 50 enhances the reliability of the electromagnetic flowmeter's overall structure and ensures measurement accuracy.

[0117] The electromagnetic flowmeter of this embodiment can avoid the noise generated by fluid particles on the electrode and the high-pressure sealing structure, and prevent the fluid from penetrating along the pressure rings 40 on both sides of the port, or seeping into the gap between the shell 10 and the liner 20, and squeezing and spreading toward the middle electrode assembly 30, and finally overflowing or spraying out at the electrode assembly 30; it fully ensures the insulation problem between the electrode assembly 30 and the shell 10, and the sealing problem of the high-pressure fluid being measured, thereby ensuring the normal operation, accuracy, and safety of the electromagnetic flowmeter.

[0118] Throughout the entire working process, the various structural components of the electromagnetic flowmeter cooperate with each other to ensure stable operation of the equipment. The liner 20 is made of insulating material to prevent current leakage from interfering with the signal; the through hole 202 of the liner 20 corresponds to the side channel 102 of the shell 10, providing a precise installation position for the electrode assembly 30 to ensure the accuracy of signal acquisition. The shell 303 and the side channel 102 are sealed to prevent fluid from entering the interior of the electrode assembly 30 and protect the normal operation of the electrode assembly 30. In addition, the liner 20 and the main channel 101 are sealed by threaded connection, interference fit or the provision of a sealing ring to prevent fluid leakage and ensure a stable measurement environment, thereby ensuring that the electromagnetic flowmeter can continuously and accurately measure fluid flow.

[0119] The electromagnetic flowmeter of this embodiment has the advantages of being able to measure slurry, being resistant to high pressure, and avoiding fluid particle noise.

[0120] The above description and accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims, and the above embodiments should be regarded as exemplary and non-restrictive.

Claims

1. An electromagnetic flowmeter, characterized in that: include: The shell encloses a main channel, and the side wall is constructed with two symmetrically distributed side channels connected to the main channel; A liner is installed in the main channel of the shell, and a through hole corresponding to the side channel is configured on the side wall of the liner; an electrode assembly, inserted into the side channel and the through hole; Among them, the electrode assembly includes a liquid electrode and a solid electrode, and the first end of the solid electrode is set to avoid the flow channel of the liner tube. The first end of the liquid electrode is located in the flow channel of the liner tube to receive and transmit the signal of the induced electromotive force generated by the measured liquid flowing in the liner tube to the solid electrode.

2. The electromagnetic flowmeter according to claim 1, characterized in that The outer peripheral surface of the liner is configured with an external thread, and the inner annular surface of the main channel is configured with an internal thread. The external thread and the internal thread are threadedly connected to ensure that the liner is fixedly connected to the main channel and is sealed.

3. The electromagnetic flowmeter according to claim 1, characterized in that The outer surface of the liner is configured with multiple annular grooves for installing sealing rings; There are at least two annular grooves respectively located at two ends of the external thread.

4. The electromagnetic flowmeter according to claim 1, characterized in that The length of the liner is shorter than that of the shell, and both ends are fixed and sealed by port clamping rings; The outer diameter of the liner is smaller than the outer diameter of the port sealing ring and larger than the inner diameter of the port sealing ring.

5. The electromagnetic flowmeter according to claim 1, characterized in that The electrode assembly also includes: The housing defines a receiving cavity for accommodating the solid electrode and the liquid electrode; Injection molding part, which is integrally injection molded with the housing, solid electrode and liquid-contacting electrode; The solid electrode and the liquid-contacting electrode are arranged in parallel, the injection molding part wraps the first end of the solid electrode, and the first end of the liquid-contacting electrode is exposed outside the injection molding part.

6. The electromagnetic flowmeter according to claim 1, characterized in that The inner annular surface of the side channel is stepped, including a first channel section and a second channel section, and the cross-sectional area of the first channel section is larger than the cross-sectional area of the second channel section; The through hole of the liner is adapted to the second channel section.

7. The electromagnetic flowmeter according to claim 6, characterized in that The injection molded portion of the electrode assembly is radially outwardly protruding from the outer peripheral surface to form a ring bulge, and the ring bulge is located at the bottom wall of the shell and the first channel section of the side channel and abuts against each other.

8. The electromagnetic flowmeter according to claim 5, characterized in that The wall of the housing cavity is constructed with a plurality of limiting grooves, and a part of the injection molded part is embedded in the limiting groove to prevent it from falling off.

9. The electromagnetic flowmeter according to claim 5, characterized in that: The outer peripheral surface of the housing is configured with one or more circumferentially arranged sealing grooves for mounting a sealing ring.

10. The electromagnetic flowmeter according to any one of claims 1 to 9, characterized in that: Also includes: A locking member is provided in the main channel to fix the electrode assembly; The locking piece is a hollow structure so that the wires of the electrode assembly can pass through.

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