High-precision electromagnetic flowmeter

Abstract

The utility model discloses a high-precision electromagnetic flowmeter which comprises a valve body and a self-cleaning mechanism. A lining ring is arranged on the inner arc face of the valve body, magnet exciting coils are arranged on the outer arc face of the lining ring, electrodes are installed on the inner arc face of the lining ring, a control shell is installed at the upper end of the valve body, a single-chip microcomputer and a converter are arranged in the control shell, and the input end of the single-chip microcomputer is electrically connected to an external power source. The input end of the magnet exciting coil is electrically connected to the output end of the single-chip microcomputer, the output end of the electrode is electrically connected to the input end of the converter, and the output end of the converter is electrically connected to the input end of the single-chip microcomputer. According to the high-precision electromagnetic flow meter, stains on the surface of the electrode of the electromagnetic flow meter are automatically cleaned, the maintenance frequency of the electromagnetic flow meter is reduced, the electromagnetic flow meter is more convenient to use, the influence of the stains on the detection precision of the electromagnetic flow meter is reduced, and the electromagnetic flow meter can still maintain high-precision detection after being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic flowmeters, in particular to a high-precision electromagnetic flowmeter. Background Art

[0002] The electromagnetic flowmeter is a new type of flow measuring instrument used to measure the volume flow of conductive liquids. It works based on the principle of electromagnetic induction and calculates the fluid flow by measuring the induced electromotive force when the conductive fluid passes through an external magnetic field. This instrument has the advantages of high precision, good stability, and easy maintenance. It is widely used in various industries such as chemical industry, metallurgy, petrochemical industry, pharmaceutical industry, and water treatment. The main components of the electromagnetic flowmeter include electromagnetic fields, conductive pipes, electrodes, and converters. In the prior art, the electrodes of the electromagnetic flowmeter must be in direct contact with the liquid to correctly measure the flow. As the use time increases, stains are easily adsorbed on the surface of the electrode, affecting the detection accuracy of the electromagnetic flowmeter. Even if the detection accuracy of the electromagnetic flowmeter can be restored by manual cleaning, the electromagnetic flowmeter needs to be frequently maintained and cleaned, which is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-precision electromagnetic flowmeter, which can automatically clean the stains on the surface of the electromagnetic flowmeter electrode, reduce the maintenance frequency of the electromagnetic flowmeter, make the use of the electromagnetic flowmeter more convenient, reduce the influence of stains on the detection accuracy of the electromagnetic flowmeter, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision electromagnetic flowmeter, comprising a valve body and a self-cleaning mechanism;

[0005] Valve body: its inner arc surface is provided with an inner lining ring, the outer arc surface of the inner lining ring is respectively provided with an excitation coil, the inner arc surface of the inner lining ring is respectively provided with electrodes, the upper end of the valve body is provided with a control shell, the interior of the control shell is respectively provided with a single-chip microcomputer and a converter, the input end of the single-chip microcomputer is electrically connected to an external power supply, the input end of the excitation coil is electrically connected to the output end of the single-chip microcomputer, the output end of the electrode is electrically connected to the input end of the converter, and the output end of the converter is electrically connected to the input end of the single-chip microcomputer;

[0006] Self-cleaning mechanism: The electrodes are arranged inside the inner lining ring and inside the self-cleaning mechanism, which automatically cleans the stains on the surface of the electromagnetic flowmeter electrode, reduces the maintenance frequency of the electromagnetic flowmeter, makes the use of the electromagnetic flowmeter more convenient, reduces the influence of stains on the detection accuracy of the electromagnetic flowmeter, and enables the electromagnetic flowmeter to maintain high-precision detection after long-term use.

[0007] Furthermore, the self-cleaning mechanism includes a slide groove and a slide column. The slide grooves are respectively arranged on the inner arc surface of the lining ring. The interior of the slide grooves is vertically slidably connected with the slide column. The electrodes are respectively arranged in the mounting holes on the surface of the slide column to provide space for cleaning the electrodes.

[0008] Furthermore, the self-cleaning mechanism also includes a rotating ring and a cleaning plate. The rotating ring is rotatably connected to the rotating grooves at the upper and lower ends of the inner lining ring respectively. The rotating grooves are connected to the sliding grooves. The ends of the rotating rings are provided with cleaning plates. The inclined surfaces of the cleaning plates are installed in cooperation with the sliding columns to clean the electrode surface.

[0009] Furthermore, the self-cleaning mechanism also includes a motor and a half gear. The motor is respectively arranged on the inner arc surface of the valve body. The output shaft end of the motor is provided with a half gear. The half gear is installed in cooperation with the teeth on the outer arc surface of the rotating ring. The input end of the motor is electrically connected to the output end of the single-chip microcomputer to provide power for cleaning the electrode.

[0010] Furthermore, the self-cleaning mechanism also includes an arc-shaped guide column and a spring. The arc-shaped guide columns are respectively arranged on the outer arc surface of the swivel. The arc-shaped guide columns respectively pass through the guide support plates on the inner arc surface of the valve body. A spring is provided between the guide support plates on the inner arc surface of the valve body and the vertical plates at the ends of the arc-shaped guide columns. The spring is movably mounted on the outer arc surface of the arc-shaped guide columns to facilitate the resetting of the swivel.

[0011] Furthermore, the self-cleaning mechanism also includes a second spring, which is respectively arranged between the sealing plate at the end of the sliding column and the inner wall of the sliding groove. The second spring is respectively movably sleeved on the outer arc surface of the sliding column to facilitate the resetting of the sliding column.

[0012] Furthermore, connecting flanges are provided at both left and right ends of the valve body to facilitate the connection between the valve body and the external pipeline.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the high-precision electromagnetic flowmeter has the following advantages:

[0014] When the fluid flows inside the valve body, the excitation coil is energized through the single-chip microcomputer to generate an induced electromotive force inside the fluid. The magnitude of the electromotive force of the fluid is detected through electrode conductivity, converter signal conversion and single-chip microcomputer calculation, and then the flow rate of the fluid is determined. During the detection process, the motor is started regularly to drive the swivel to reciprocate, pushing the cleaning plate to continuously contact the surface of the electrode, automatically cleaning the stains on the surface of the electromagnetic flowmeter electrode, reducing the maintenance frequency of the electromagnetic flowmeter, making the electromagnetic flowmeter more convenient to use, reducing the impact of stains on the detection accuracy of the electromagnetic flowmeter, and enabling the electromagnetic flowmeter to maintain high-precision detection after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic structural diagram of a side cross-section of the overall device of the utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A of the utility model.

[0018] In the figure: 1 valve body, 2 connecting flange, 3 liner ring, 4 electrode, 5 excitation coil, 6 control shell, 7 single chip microcomputer, 8 converter, 9 self-cleaning mechanism, 91 slide groove, 92 slide column, 93 swivel, 94 cleaning plate, 95 motor, 96 half gear, 97 arc guide column, 98 spring one, 99 spring two. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 ,This embodiment provides a technical solution: a high-precision electromagnetic flowmeter, including a valve body 1 and a self-cleaning mechanism 9;

[0021] Valve body 1: Its inner arc surface is provided with an inner liner ring 3 to reduce the corrosion of the detection fluid on the valve body 1, the outer arc surface of the inner liner ring 3 is respectively provided with an excitation coil 5, and the inner arc surface of the inner liner ring 3 is respectively installed with an electrode 4. The upper end of the valve body 1 is installed with a control shell 6, and the interior of the control shell 6 is respectively provided with a single-chip microcomputer 7 and a converter 8. The input end of the single-chip microcomputer 7 is electrically connected to an external power supply, the input end of the excitation coil 5 is electrically connected to the output end of the single-chip microcomputer 7, the output end of the electrode 4 is electrically connected to the input end of the converter 8, and the output end of the converter 8 is electrically connected to the input end of the single-chip microcomputer 7. The excitation coil 5 is energized by the single-chip microcomputer 7 to generate an induced electromotive force inside the fluid. The size of the induced electromotive force is related to the flow rate of the fluid. The size of the electromotive force of the fluid is detected through the conduction of the electrode 4, the signal conversion of the converter 8 and the calculation of the single-chip microcomputer 7, and then the flow rate of the fluid is determined. The left and right ends of the valve body 1 are provided with connecting flanges 2 to facilitate the connection of the valve body 1 with the external pipeline;

[0022] Self-cleaning mechanism 9: respectively arranged inside the inner liner ring 3, the electrode 4 is respectively arranged inside the self-cleaning mechanism 9, the self-cleaning mechanism 9 includes a slide groove 91 and a slide column 92, the slide groove 91 is respectively arranged on the inner arc surface of the inner liner ring 3, the inside of the slide groove 91 is vertically slidably connected with the slide column 92, the electrode 4 is respectively arranged in the mounting hole on the surface of the slide column 92, the self-cleaning mechanism 9 also includes a swivel 93 and a cleaning plate 94, the swivel 93 is rotatably connected to the swivel groove at the upper and lower ends of the inner liner ring 3, the swivel groove is connected to the slide groove 91, the end of the swivel 93 is provided with a cleaning plate 94, the inclined surface of the cleaning plate 94 is installed in conjunction with the slide column 92, and the self-cleaning mechanism 9 also includes a swivel 93 and a cleaning plate 94. The mechanism 9 also includes a motor 95 and a half gear 96. The motor 95 is respectively arranged on the inner arc surface of the valve body 1. The output shaft end of the motor 95 is provided with a half gear 96. The half gear 96 is installed in cooperation with the teeth of the outer arc surface of the rotating ring 93. The input end of the motor 95 is electrically connected to the output end of the single-chip microcomputer 7. The self-cleaning mechanism 9 also includes an arc guide column 97 and a spring 98. The arc guide column 97 is respectively arranged on the outer arc surface of the rotating ring 93. The arc guide column 97 passes through the guide support plate of the inner arc surface of the valve body 1. A spring 98 is provided between the guide support plate of the inner arc surface of the valve body 1 and the vertical plate of the end of the arc guide column 97. The spring 98 is respectively movable. The self-cleaning mechanism 9 is sleeved on the outer arc surface of the arc guide column 97, and the self-cleaning mechanism 9 also includes a spring 2 99. The spring 2 99 is respectively arranged between the sealing plate at the end of the slide column 92 and the inner wall of the slide groove 91. The spring 2 99 is respectively movably sleeved on the outer arc surface of the slide column 92. During the detection process, the motor 95 is started regularly, and the output shaft of the motor 95 drives the half gear 96 to rotate. When the half gear 96 and the teeth are engaged with the teeth on the outer arc surface of the rotating ring 93, the half gear 96 drives the rotating ring 93 and the cleaning plate 94 to rotate counterclockwise, and the inclined surface of the cleaning plate 94 is used to apply a force to the slide column 92 to overcome the elastic force of the spring 2 99, so that the slide column 92 is in the slide groove. 91, so that the cleaning plate 94 contacts the side of the sliding column 92 close to the center of the valve body 1. During the movement of the cleaning plate 94, the surface of the electrode 4 is cleaned to reduce the accumulation of dirt carried in the fluid on the surface of the electrode 4, so that the detection result of the electromagnetic flowmeter is more accurate. When the teeth of the half gear 96 are separated from the teeth of the outer arc surface of the rotating ring 93, the rotating ring 93 rotates clockwise and resets under the elastic force of the spring 1 98. At the same time, the sliding column 92 is reset under the elastic force of the spring 2 99. With the continuous rotation of the half gear 96, the rotating ring 93 rotates back and forth to clean the dirt on the surface of the electrode of the electromagnetic flowmeter.

[0023] The working principle of a high-precision electromagnetic flowmeter provided by the utility model is as follows: when the fluid flows inside the valve body 1, the excitation coil 5 is energized through the single-chip microcomputer 7 to generate an induced electromotive force inside the fluid. The magnitude of the induced electromotive force is related to the flow rate of the fluid. The magnitude of the electromotive force of the fluid is detected through the conduction of the electrode 4, the signal conversion of the converter 8 and the calculation of the single-chip microcomputer 7, and then the flow rate of the fluid is determined. During the detection process, the motor 95 is started regularly, and the output shaft of the motor 95 drives the half gear 96 to rotate. When the half gear 96 and the teeth are meshed with the teeth of the outer arc surface of the rotating ring 93, the half gear 96 drives the rotating ring 93 and the cleaning plate 94 to rotate counterclockwise, and the inclined surface of the cleaning plate 94 is used to move the sliding column 9 2 applies a force to overcome the elastic force of the second spring 99, so that the slide post 92 slides in the slide groove 91, and the cleaning plate 94 contacts the side of the slide post 92 close to the center of the valve body 1. During the movement of the cleaning plate 94, the surface of the electrode 4 is cleaned to reduce the accumulation of dirt carried in the fluid on the surface of the electrode 4, so that the detection result of the electromagnetic flowmeter is more accurate. When the teeth of the half gear 96 are separated from the teeth of the outer arc surface of the rotating ring 93, the rotating ring 93 rotates clockwise to reset under the elastic force of the first spring 98. At the same time, the slide post 92 is reset under the elastic force of the second spring 99. With the continuous rotation of the half gear 96, the rotating ring 93 rotates back and forth to clean the dirt on the surface of the electrode of the electromagnetic flowmeter.

[0024] It is worth noting that the single-chip microcomputer 7 disclosed in the above embodiment can use the AT89C4051 model single-chip microcomputer, and the excitation coil 5, the converter 8 and the motor 95 can be freely configured according to the actual application scenario. The excitation coil 5 can use the DN50 model excitation coil, the converter 8 can use the DZA-01 model electrical signal converter, and the motor 95 can use the 3M57-42A model stepper motor. The single-chip microcomputer 7 controls the excitation coil 5, the converter 8 and the motor 95 using methods commonly used in the prior art.

[0025] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-precision electromagnetic flowmeter, characterized in that: It comprises a valve body (1) and a self-cleaning mechanism (9); A valve body (1): an inner lining ring (3) is provided on its inner arc surface, an excitation coil (5) is provided on the outer arc surface of the inner lining ring (3), and electrodes (4) are installed on the inner arc surface of the inner lining ring (3); a control shell (6) is installed on the upper end of the valve body (1), and a single-chip computer (7) and a converter (8) are provided inside the control shell (6); an input end of the single-chip computer (7) is electrically connected to an external power supply, an input end of the excitation coil (5) is electrically connected to an output end of the single-chip computer (7), an output end of the electrode (4) is electrically connected to an input end of the converter (8), and an output end of the converter (8) is electrically connected to an input end of the single-chip computer (7); Self-cleaning mechanisms (9): respectively arranged inside the inner lining ring (3); and electrodes (4) respectively arranged inside the self-cleaning mechanisms (9).

2. A high-precision electromagnetic flowmeter according to claim 1, characterized in that: The self-cleaning mechanism (9) comprises a slide groove (91) and a slide column (92), wherein the slide grooves (91) are respectively arranged on the inner arc surface of the inner liner ring (3), the interior of the slide grooves (91) is vertically slidably connected to the slide column (92), and the electrodes (4) are respectively arranged in mounting holes on the surface of the slide column (92).

3. A high-precision electromagnetic flowmeter according to claim 2, characterized in that: The self-cleaning mechanism (9) further comprises a rotating ring (93) and a cleaning plate (94); the rotating ring (93) is rotatably connected to the rotating grooves at the upper and lower ends of the inner liner ring (3); the rotating grooves are connected to the slide grooves (91); the ends of the rotating ring (93) are provided with cleaning plates (94); the inclined surfaces of the cleaning plates (94) are mounted in cooperation with the slide column (92).

4. A high-precision electromagnetic flowmeter according to claim 3, characterized in that: The self-cleaning mechanism (9) further comprises a motor (95) and a half gear (96); the motor (95) is respectively arranged on the inner arc surface of the valve body (1); the output shaft end of the motor (95) is provided with a half gear (96); the half gear (96) is mounted in cooperation with the teeth on the outer arc surface of the rotating ring (93); the input end of the motor (95) is electrically connected to the output end of the single chip microcomputer (7).

5. A high-precision electromagnetic flowmeter according to claim 3, characterized in that: The self-cleaning mechanism (9) further comprises an arc-shaped guide column (97) and a spring (98), wherein the arc-shaped guide column (97) is respectively arranged on the outer arc surface of the rotating ring (93), and the arc-shaped guide column (97) passes through the guide support plate on the inner arc surface of the valve body (1), and a spring (98) is arranged between the guide support plate on the inner arc surface of the valve body (1) and the vertical plate at the end of the arc-shaped guide column (97), and the spring (98) is movably sleeved on the outer arc surface of the arc-shaped guide column (97).

6. A high-precision electromagnetic flowmeter according to claim 2, characterized in that: The self-cleaning mechanism (9) further comprises a second spring (99), wherein the second spring (99) is respectively arranged between a sealing plate at an end of the slide column (92) and an inner wall of the slide groove (91), and the second spring (99) is respectively movably sleeved on an outer arc surface of the slide column (92).

7. A high-precision electromagnetic flowmeter according to claim 1, characterized in that: The left and right ends of the valve body (1) are both provided with connecting flanges (2).

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