Electromagnetic flow sensor and method of use thereof

Abstract

The present invention belongs to the field of liquid flow detection, and discloses an electromagnetic flow sensor and a method for using the same. The electromagnetic flow sensor includes a tube body, an electromagnetic assembly, a shell, and an electrode, wherein the electrode is mounted on the tube body, the electromagnetic assembly includes a coil winding and a coil frame, two relative positioning parts are provided on the tube body, the coil winding is mounted on the coil frame, and each positioning part is fixedly mounted with a coil frame, and the shell covers the tube body, the electromagnetic assembly, and the electrode. The detection accuracy is improved.

Description

Technical Field

[0001] The invention belongs to the field of liquid flow detection, in particular to an electromagnetic flow sensor and a use method thereof. Background Art

[0002] Electromagnetic flow sensors have been widely used. The advantages of electromagnetic flow sensors mainly include the following aspects. The measurement is not affected by the temperature, pressure or viscosity of the measured liquid; there is no pressure loss; it can measure continuously with high measurement accuracy; the caliber range and measurement range are large, and the measurement range is continuously adjustable; it is independent of flow velocity distribution, etc. However, there are also problems. For example, due to the problem of installation accuracy, it is easy to cause large errors in measurement on the same batch and model. Summary of the invention

[0003] The purpose of the present invention is to improve the shortcomings of the prior art, provide an electromagnetic flow sensor and a method of using the same, and improve detection accuracy.

[0004] The technical solution is as follows:

[0005] The electromagnetic flow sensor comprises a tube body, an electromagnetic component, a shell and an electrode, wherein the electrode is mounted on the tube body, the electromagnetic component comprises a coil winding and a coil frame, two mutually symmetrical positioning parts are provided on the tube body, the coil winding is mounted on the coil frame, a coil frame is fixedly mounted on each of the positioning parts, and the shell covers the tube body, the electromagnetic component and the electrode.

[0006] When the electromagnetic flow sensor is assembled, the electromagnetic component is treated as a whole, and the coil winding is fixed by a coil frame, so the specifications of the coil winding are relatively uniform, and the magnetic field generated during use is basically the same. The positioning part provided on the tube body can be used to fix the two coil frames, and the fixed position of the coil frames is also fixed. After the positions of the two coil frames are fixed, the position and intensity of the magnetic field generated by the coil winding when it is energized are stable, so the measurement deviation of each electromagnetic flow sensor manufactured is extremely small, and the detection accuracy is also guaranteed.

[0007] The coil frame includes two parallel plates and a winding shaft clamped in the middle of the plates, and the coil winding is wound on the winding shaft. The coil winding is fixed by limiting between the two parallel plates, so that each group of coil windings is kept on a parallel plane.

[0008] The electromagnetic assembly also includes an iron core with a groove in the middle, a through hole in the middle of the coil frame, the through hole passes through the plate and the winding shaft, and the positioning part includes an iron core positioning column and a coil positioning column; the iron core is inserted into the through hole, and the groove of the iron core is stuck on the iron core positioning column, and the edge of the plate is fixed on the coil positioning column. The iron core is used to enhance the magnetism of the electromagnet. In addition, the position of the iron core is fixed by matching the groove of the iron core with the iron core positioning column. At this time, since the magnetized part is the iron core, the position of the magnetic field can be relatively fixed by positioning the iron core. Then the plate is fixed on the coil positioning column, and at this time, the coil winding is also fixed.

[0009] A holding plate is provided at one end of the iron core, and the holding plate holds the coil frame and is fixed to the coil positioning column by a nail. After the holding plate is fixed, the position of the iron core is also completely fixed. At the same time, the coil frame is fixed by the holding plate, and this arrangement enables the position of the coil frame and the iron core to be directly associated and fixed.

[0010] There are three electrodes, and three mounting holes are arranged on the tube body, one of which is arranged in the middle of the core positioning column, and the other two mounting holes are arranged around the tube body and are located on both sides of the mounting hole arranged in the middle of the core positioning column. The three electrodes are arranged separately, which is convenient for mold processing when injection molding is adopted. One of the electrodes is used for grounding to form a reference point for measurement, so the measurement error will be reduced.

[0011] Specifically, the tube body is made of plastic, and the electrode is integrally formed with the tube body by injection molding. Here, the three electrodes are installed together in a mold, and then the tube body and the electrode are integrally formed by injection molding. At this time, the electrode is embedded in the tube body, and the positioning effect is excellent, and the installation effect is omitted. When processing the tube body, there is no need to consider the installation accuracy of the electrode, and the sealing effect is good, and no water leakage will occur.

[0012] The invention also comprises a shielding cover, which covers the outer sides of the two electromagnetic components. The shielding cover directly covers the two electromagnetic components to prevent electromagnetic additional loss and heat generation.

[0013] It also includes a temperature sensor, which is installed on the pipe body, and one detection end of the temperature sensor extends into the interior of the pipe body. The temperature sensor is used to detect the temperature of the liquid in the pipe body. By identifying the inlet and outlet temperatures and the flow rate, the change in heat can be measured to complete the measurement of fluid heat.

[0014] The display assembly is also included, and the display assembly is installed above the housing, and the display assembly includes an integrator and a display. The display assembly is provided with an integrator, and the flow rate or heat information is finally calculated through the information imported by the electrode and the temperature sensor, and displayed on the display.

[0015] It also includes a rotating connection ring, one end of which is fixedly mounted on the housing, and the other end is sealed and rotatably connected to the display assembly. The housing, the rotating connection ring and the display assembly are all provided with through holes, and the housing, the rotating connection ring and the through holes on the display assembly are in communication. The rotating connection ring and the display assembly are rotatably connected, and a sealing ring is used to achieve sealing therebetween. By rotating the display assembly, readings can be viewed in different scenarios.

[0016] The display component is provided with a protective shell and a display shell on the outside, wherein the protective shell is provided with a cavity inside for accommodating the integrator, and the display shell is used for displaying readings.

[0017] The method for using the electromagnetic flow sensor includes the following steps:

[0018] Connect the electromagnetic flow sensor to the pipeline to be tested;

[0019] The electromagnetic assembly is turned on, and the coil winding is energized to generate a magnetic field;

[0020] The conductive liquid in the tube flows through the cross section of the tube, cutting the magnetic flux lines, and the electrodes sense the electromotive force and output the electromotive force signal;

[0021] The processing center receives the electromotive force signal and calculates it to obtain the liquid flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods, constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0023] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0024] Figure 1 is a schematic diagram of the decomposed structure of an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0026] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0027] Figure 4This is a schematic diagram of the coordination structure of the tube body and the electromagnetic assembly according to an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of the exploded structure of the tube body and the electromagnetic assembly of an embodiment of the present invention;

[0029] Figure 6 is a schematic cross-sectional structural diagram of a tube body and an electromagnetic assembly according to an embodiment of the present invention;

[0030] Figure 7 is a schematic diagram of the three-dimensional structure of a coil frame according to an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the tube body according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 10. Tube body; 11. Positioning part; 111. Iron core positioning column; 112. Coil positioning column; 12. Mounting hole; 20. Electromagnetic assembly; 21. Iron core; 211. Holding plate; 22. Coil frame; 221. Plate material; 222. Winding shaft; 223. Through hole; 30. Shell; 40. Electrode; 50. Shielding cover; 60. Temperature sensor; 70. Display assembly; 71. Protective shell; 72. Display shell; 80. Rotating connecting ring; 90. Integrator. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0035] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In the case of combining the technical solution of the present invention with a realistic scenario, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solution of the present invention.

[0036] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0037] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0039] like Figures 1 to 5 As shown, the electromagnetic flow sensor includes a tube body 10, an electromagnetic component 20, a shell 30 and an electrode 40, wherein the electrode 40 is mounted on the tube body 10, the electromagnetic component 20 includes a coil winding and a coil frame 22, the tube body 10 is provided with two mutually symmetrical positioning parts 11, the coil winding is mounted on the coil frame 22, and a coil frame 22 is fixedly mounted on each of the positioning parts 11, and the shell 30 covers the tube body 10, the electromagnetic component 20 and the electrode 40.

[0040] When the electromagnetic flow sensor is assembled, the electromagnetic component 20 is treated as a whole, and the coil winding is fixed by the coil frame 22, so the specifications of the coil winding are relatively uniform, and the magnetic field generated during use is basically the same. The positioning portion 11 provided on the tube body 10 can be used to fix the two coil frames 22, and the fixed position of the coil frames 22 is also fixed. After the positions of the two coil frames 22 are fixed, the position and intensity of the magnetic field generated by the coil winding when it is energized are stable, so the measurement deviation of each manufactured electromagnetic flow sensor is extremely small, and the detection accuracy is also guaranteed.

[0041] like Figure 5 and Figure 7 As shown, the coil frame 22 includes two parallel plates 221 and a winding shaft 222 clamped in the middle of the plates 221, and the coil winding is wound on the winding shaft 222. The coil winding is fixed by limiting between the two parallel plates 221, so that each group of coil windings is kept on a parallel plane.

[0042] like Figure 5 , Figure 6 and Figure 8As shown, the electromagnetic assembly 20 also includes an iron core 21 with a groove in the middle, a through hole 223 in the middle of the coil frame 22, the through hole 223 passes through the plate 221 and the winding shaft 222, and the positioning part 11 includes an iron core positioning column 111 and a coil positioning column 112; the iron core 21 is inserted into the through hole 223, and the groove of the iron core 21 is stuck on the iron core positioning column 111, and the edge of the plate 221 is fixed on the coil positioning column 112. The iron core 21 is used to enhance the magnetism of the electromagnet. In addition, the position of the iron core 21 is fixed by matching the groove of the iron core 21 with the iron core positioning column 111. At this time, since the magnetized part is the iron core 21, the position of the magnetic field can be relatively fixed by positioning the iron core 21. Then the plate 221 is fixed on the coil positioning column 112, and at this time, the coil winding is also fixed.

[0043] like Figure 5 As shown, a holding plate 211 is provided at one end of the iron core 21, and the holding plate 211 holds the coil frame 22 and is fixed to the coil positioning column 112 through a nail. After the holding plate 211 is fixed, the position of the iron core 21 is also completely fixed. At the same time, the coil frame 22 is fixed by the holding plate 211, and this arrangement enables the positions of the coil frame 22 and the iron core 21 to be directly associated and fixed.

[0044] like Figure 1 and Figure 6 As shown, three electrodes 40 are provided, and three mounting holes 12 are provided on the tube body 10, one of which is provided in the middle of the core positioning column 111, and the other two mounting holes 12 are provided around the tube body 10 and are located on both sides of the mounting hole 12 provided in the middle of the core positioning column 111. The three electrodes 40 are provided separately, which is convenient for mold processing when injection molding is adopted. One of the electrodes 40 is used for grounding to form a reference point for measurement, so the measurement error will be reduced.

[0045] Specifically, the tube body 10 is made of plastic, and the electrode 40 is integrally injection molded with the tube body 10. Here, the three electrodes 40 are installed together in a mold, and then the tube body 10 and the electrode 40 are integrally molded by injection molding. At this time, the electrode 40 is embedded in the tube body 10, and the positioning effect is excellent, and the installation effect is omitted. When processing the tube body 10, there is no need to consider the installation accuracy of the electrode 40, and the sealing effect is good, and no water leakage occurs.

[0046] like Figure 4 and Figure 5 As shown, a shielding cover 50 is also included, and the shielding cover 50 covers the outer sides of the two electromagnetic components 20. The shielding cover 50 directly covers the two electromagnetic components 20 to prevent electromagnetic additional loss and heat generation.

[0047] like Figure 1 As shown, a temperature sensor 60 is also included, and the temperature sensor 60 is installed on the pipe body 10, and one detection end of the temperature sensor 60 extends into the interior of the pipe body 10. The temperature sensor 60 is used to detect the temperature of the liquid in the pipe body 10. By identifying the inlet and outlet temperatures and the flow rate, the change value of the heat can be measured to complete the measurement of the fluid heat.

[0048] like Figure 1 As shown, the display assembly 70 is also included, and the display assembly 70 is installed above the housing 30. The display assembly 70 includes an integrator 90 and a display. The display assembly 70 is provided with an integrator 90, and the flow rate or heat information is finally calculated through the information imported by the electrode 40 and the temperature sensor 60, and displayed on the display.

[0049] like Figures 1 to 3 As shown, it also includes a rotating connection ring 80, one end of which is fixedly mounted on the housing 30, and the other end is sealed and rotatably connected to the display assembly 70. The housing 30, the rotating connection ring 80 and the display assembly 70 are all provided with through holes, and the housing 30, the rotating connection ring 80 and the through holes on the display assembly 70 are in communication. The rotating connection ring 80 is rotatably connected to the display assembly 70, and a seal is achieved between them through a sealing ring. By rotating, the reading can be viewed by rotating the display assembly 70 in different scenes.

[0050] like Figure 1 As shown, the display assembly 70 has a protective shell 71 and a display shell 72 on the outside, wherein the protective shell 71 has a cavity inside for accommodating the integrator 90, and the display shell 72 is used for displaying readings.

[0051] The method for using the electromagnetic flow sensor includes the following steps:

[0052] Connect the electromagnetic flow sensor to the pipeline to be tested;

[0053] The electromagnetic assembly 20 is turned on, and the coil winding is energized to generate a magnetic field;

[0054] The conductive liquid in the tube body 10 flows through the cross section of the tube body 10, cutting the magnetic flux lines, and the electrode 40 senses an electromotive force and outputs an electromotive force signal;

[0055] The processing center receives the electromotive force signal and calculates it to obtain the liquid flow rate.

[0056] The processing center of this embodiment is the integrator.

[0057] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0058] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0059] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. Electromagnetic flow sensor, characterized in that: It comprises a tube body, an electromagnetic assembly, a shell and an electrode, wherein the electrode is mounted on the tube body, the electromagnetic assembly comprises a coil winding and a coil frame, two mutually symmetrical positioning parts are arranged on the tube body, the coil winding is mounted on the coil frame, one coil frame is fixedly mounted on each positioning part, and the shell covers the tube body, the electromagnetic assembly and the electrode; The coil frame includes two parallel plates and a winding shaft clamped in the middle of the plate, and the coil winding is wound on the winding shaft; The electromagnetic assembly also includes an iron core with a groove in the middle, a through hole is opened in the middle of the coil frame, the through hole passes through the plate and the winding shaft, and the positioning part includes an iron core positioning column and a coil positioning column; The iron core is inserted into the through hole, and the groove of the iron core is stuck on the iron core positioning column, and the edge of the plate is fixed on the coil positioning column; A holding plate is provided at one end of the iron core, the holding plate holds the coil frame and is fixed to the coil positioning column through a nail body; The electromagnetic flow sensor also includes a temperature sensor and a display assembly. The temperature sensor is mounted on the tube body, and a detection end thereof extends into the interior of the tube body. The display assembly is installed above the housing, and the display assembly includes an integrator and a display.

2. The electromagnetic flow sensor according to claim 1, characterized in that: There are three electrodes, and three mounting holes are arranged on the tube body, one of which is arranged in the middle of the core positioning column, and the other two mounting holes are arranged around the tube body and are located on both sides of the mounting hole arranged in the middle of the core positioning column.

3. The electromagnetic flow sensor according to any one of claims 1 or 2, characterized in that: The tube body is made of plastic, and the electrode and the tube body are integrally formed by injection molding.

4. The electromagnetic flow sensor according to any one of claims 1 or 2, characterized in that: It also includes a shielding cover, which covers the outer sides of the two electromagnetic components.

5. A method for using an electromagnetic flow sensor, wherein the electromagnetic flow sensor according to any one of claims 1 to 4 is applied to the method for using the electromagnetic flow sensor, characterized in that: The steps include: Connect the electromagnetic flow sensor to the pipeline to be tested; The electromagnetic assembly is turned on, and the coil winding is energized to generate a magnetic field; The conductive liquid in the tube flows through the cross section of the tube, cutting the magnetic flux lines, and the electrodes sense the electromotive force and output the electromotive force signal; The processing center receives the electromotive force signal and calculates it to obtain the liquid flow rate.

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