Electromagnetic flowmeter with water quality monitoring function

Abstract

The invention relates to the technical field of electromagnetic flow meters, in particular to an electromagnetic flow meter with a water quality monitoring function, which comprises a lining pipe, rotating blades are mounted on the front side of the interior of the lining pipe, an ultrasonic assembly is arranged on the lower side of the front end of the lining pipe, fluid acts on the interior of the ultrasonic assembly, and an isolation shell wraps the middle section of the lining pipe. Excitation coils are arranged on the upper portion and the lower portion in the isolation shell, electrodes are installed on the left side and the right side of the middle section of the lining pipe, an oil stain detection mechanism is arranged on one side of the top end of the isolation shell, and a shielding shell arranged on the outer side of the lining pipe in a sleeving mode is arranged on the front side of the isolation shell. Through cooperation of multiple means such as rotational flow, ultrasonic waves, magnetic field shaping and radio frequency detection, effective separation, quantitative detection and accurate recognition of bubbles, oil stains and impurities are achieved, the stability and accuracy of electromagnetic flow measurement are remarkably improved, and online cleaning and anti-interference capacity is achieved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic flowmeter technology, and in particular to an electromagnetic flowmeter with water quality monitoring function. Background Technology

[0002] Electromagnetic flowmeters are a new type of flow measurement instrument that has emerged with the rapid development of electronic technology. They work based on the principle of electromagnetic induction. When a conductive fluid passes through the external magnetic field of the instrument, it will generate a corresponding electromotive force due to cutting the magnetic field lines. By capturing and calculating the relevant data of this electromotive force, the instrument can accurately measure the flow rate of the conductive fluid. Due to its advantages such as no mechanical flow obstruction parts, wide measurement range, and strong corrosion resistance, this type of instrument is widely used in conductive fluid flow monitoring in many fields such as chemical industry, water supply and drainage, and metallurgy.

[0003] Existing electromagnetic flowmeters typically rely on simple filtration or static rectification structures before water enters the detection area, making it difficult to effectively separate air bubbles, oil, and fine impurities from the fluid. These impurities are randomly distributed within the pipe and easily enter the detection area with the fluid. Especially under conditions with high levels of gas, oil, or impurities, air bubbles and oil adhere to or accumulate near the detection components, leading to turbulent flow fields and significant fluctuations in electrode signals. This results in poor stability and repeatability of flow and composition detection results. While some existing technologies attempt to compensate for detection errors by enhancing the magnetic field or improving signal processing capabilities, insufficient fluid pretreatment makes the magnetic field distribution susceptible to interference from impurities and noise, hindering the formation of a uniform and stable detection environment. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by proposing an electromagnetic flowmeter with water quality monitoring function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electromagnetic flowmeter with water quality monitoring function includes an inner liner tube. A rotating blade is installed on the front side of the inner liner tube. An ultrasonic component is located on the lower front end of the inner liner tube, acting on the fluid inside. A middle section of the inner liner tube is enclosed by an insulating shell. Excitation coils are located at the top and bottom of the insulating shell. Electrodes are installed on both sides of the middle section of the inner liner tube. An oil detection mechanism is located on one side of the top of the insulating shell. A shielding shell is located on the front of the insulating shell, fitted over the inner liner tube. A ring-shaped permanent magnet is installed inside the shielding shell. An radio frequency coil is located behind the insulating shell, fitted over the inner liner tube. A data analysis mechanism connected to the radio frequency coil is located at the top of the insulating shell.

[0007] Preferably, flanges are installed at both ends of the inner liner for connecting to external pipelines.

[0008] Preferably, the ultrasonic component includes an ultrasonic device fixedly installed on the lower front end of the inner liner tube, the working end of the ultrasonic device being connected to a transmitter, and the transmitter being installed on the lower front side inside the inner liner tube.

[0009] Preferably, magnetic boots are fixedly installed on both the upper and lower sides at the middle position of the inner liner tube. A resonant cavity is detachably installed on the side of the magnetic boot away from the inner liner tube. Both the resonant cavity and the magnetic boot are located inside the insulating shell. The excitation coil is located inside the resonant cavity and is supplied with alternating current to generate an alternating magnetic field. The resonant cavity has a neck opening on the side near the inner liner tube. The neck opening passes through the magnetic boot and is aligned with the detection area in the inner liner tube.

[0010] Preferably, the magnetic boots are arched and the two magnetic boots are designed in a mirror symmetry.

[0011] Preferably, the oil stain detection mechanism includes an oil stain detector fixedly installed on the top of the insulating shell, a sewage pump installed on the top of the inner liner tube on the front side of the insulating shell, the output end of the sewage pump and the input end of the oil stain detector are connected by a conduit, the input end of the sewage pump is located at the top of the inner liner tube, and a metering valve is installed at the input end of the sewage pump.

[0012] Preferably, the output of the oil stain detector is connected to an external collection device.

[0013] Preferably, the data analysis mechanism includes a fixed shell mounted on the top of the insulating outer shell, a connector mounted on the top of the fixed shell, the connector being connected to the radio frequency coil via a receiving line, a converter mounted on the top of the connector, and data being transmitted between the connector and the converter via wired or wireless means.

[0014] Preferably, the converter is equipped with a control panel for controlling the entire device.

[0015] Preferably, a power supply is provided inside the fixed housing, which is used to power the entire device.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] 1. This invention, through the synergistic effect of rotating blades and ultrasonic devices, creates a stable swirling and cavitation environment before water enters the detection area, effectively concentrating and separating impurities, bubbles, and oil contaminants upwards, preventing their disorderly distribution within the pipeline; the cavitation effect promotes impurity migration while achieving defoaming and oil-water separation, significantly reducing the interference of bubbles and oil contaminants on subsequent flow and component detection, creating purer and more stable fluid conditions for detection.

[0018] 2. This invention uses a quantitative valve in conjunction with a sewage pump to quantitatively extract the mixture of air bubbles and oil from the top and send it to an oil detector for detection. This achieves accurate monitoring of oil content without significantly affecting the overall flow rate of the pipeline. The quantitative extraction method ensures a clear correlation between the detection results, making it easier to set safety thresholds and determine the operating status. At the same time, it enables centralized collection and post-treatment of oily wastewater, improving the reliability and environmental friendliness of the system.

[0019] 3. In this invention, the ultrasonic waves propagate inside the inner liner tube, not only participating in impurity separation but also continuously cleaning the tube wall online, preventing rust, deposits, and other substances from adhering to the tube wall surface during long-term operation. This self-cleaning effect effectively avoids the impact of tube wall scaling on electrode signals and magnetic field distribution, ensuring long-term stability of the detection environment, thereby maintaining the accuracy and repeatability of flow and impurity detection and reducing the frequency of manual maintenance.

[0020] 4. The permanent magnet block, excitation coil, magnetic shoe and resonant cavity of this invention work together to pre-magnetize magnetic impurities in the fluid and shape a uniform and stable detection magnetic field, making the flow velocity distribution more regular and the signal-to-noise ratio higher; the radio frequency coil further resonates to detect polarized impurities, which can identify the type and content of rust and other impurities; at the same time, the resonant cavity has the effect of absorbing noise and vibration, significantly reducing external interference and improving the overall detection accuracy.

[0021] In summary, this invention achieves effective separation, quantitative detection, and accurate identification of bubbles, oil stains, and impurities through the synergistic combination of multiple methods such as swirling flow, ultrasonic waves, magnetic field shaping, and radio frequency detection. It not only significantly improves the stability and accuracy of electromagnetic flow measurement but also has online cleaning and anti-interference capabilities. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0023] Figure 2 This is a schematic diagram of the converter and control panel structure of an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0024] Figure 3 This is a schematic diagram of the inner liner and electrode structure of an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0025] Figure 4 This is a schematic diagram of the excitation coil and shielding shell structure of an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0026] Figure 5 This is a schematic diagram of a sewage pump and conduit structure for an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0027] Figure 6 This is a schematic diagram of the resonant cavity and neck structure of an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0028] Figure 7 This is a schematic diagram of the oil stain detector and metering valve structure of an electromagnetic flowmeter with water quality monitoring function proposed in this invention.

[0029] In the diagram: 1 Converter, 2 Control Panel, 3 Connector, 4 Receiver Line, 5 Power Supply, 6 Flange, 7 Insulation Housing, 8 Inner Liner, 9 Electrode, 10 Magnetic Shoe, 11 Resonant Cavity, 12 Neck, 13 Excitation Coil, 14 Shielding Housing, 15 Permanent Magnet, 16 RF Coil, 17 Sewage Pump, 18 Conduit, 19 Oil Detector, 20 Metering Valve, 21 Ultrasonic Device, 22 Transmitter, 23 Rotating Blade. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Reference Figures 1 to 7 An electromagnetic flowmeter with water quality monitoring function includes an inner liner tube 8. Flanges 6 are installed at both ends of the inner liner tube 8. A rotating blade 23 is rotatably installed on the front side of the inner liner tube 8 via a bearing. An ultrasonic device 21 is fixedly installed on the lower front side of the inner liner tube 8. The ultrasonic device 21 is existing technology, and its specific structural design will not be described in detail here. The working end of the ultrasonic device 21 is connected to a transmitter 22. The transmitter 22 is installed on the lower front side of the inner liner tube 8, so that the ultrasonic device 21 can use the transmitter 22 to act ultrasonic waves on the water to generate a cavitation effect in the water. Under the cooperation of the swirling flow formed by the rotating blade 23, the impurities in the lower and middle parts of the inner liner tube 8 are impacted to the top.

[0032] The middle section of the inner liner tube 8 is wrapped with an insulating shell 7. Magnetic boots 10 are fixedly installed on both the upper and lower sides of the middle position of the outer wall of the inner liner tube 8. The magnetic boots 10 are arched and the two magnetic boots 10 are designed in a mirror symmetry. A resonant cavity 11 is detachably installed on the side of the magnetic boots 10 away from the inner liner tube 8. The resonant cavity 11 and the magnetic boots 10 are both located inside the insulating shell 7. An oil stain detector 19 is installed on one side of the top of the insulating shell 7. A sewage pump 17 is installed on the front side of the insulating shell 7 at the top of the inner liner tube 8. The output end of the sewage pump 17 is connected to the input end of the oil stain detector 19 through a conduit 18. The input end of the sewage pump 17 is located at the top of the inner liner tube 8, and a metering valve 20 is installed at the input end of the sewage pump 17 for metering the mixture of air bubbles and oil stains at the top of the inner liner tube 8. The output end of the oil stain detector 19 is connected to an external collection device.

[0033] A shielding shell 14 is fixedly sleeved on the outside of the inner liner tube 8 between the isolation shell 7 and the sewage pump 17. The side of the shielding shell 14 that contacts the inner liner tube 8 does not have a shielding function. A permanent magnet block 15 arranged in a ring is installed inside the shielding shell 14. The uniform magnetic field generated by the permanent magnet block 15 can polarize magnetic materials such as rust in the fluid flowing inside the inner liner tube 8 to achieve a stable magnetization state. The shielding shell 14 is used to prevent the magnetic field generated by the permanent magnet block 15 from affecting the excitation coil 13.

[0034] An excitation coil 13 is installed inside the resonant cavity 11. An alternating current is passed through the excitation coil 13 to generate an alternating magnetic field. A neck 12 is provided on the side of the resonant cavity 11 near the inner liner tube 8. The neck 12 passes through the magnetic shoe 10 and is aligned with the detection area inside the inner liner tube 8. Electrodes 9 are installed on both sides of the middle section of the inner liner tube 8. One electrode 9 is the negative pole and the other is the positive pole. Both are connected to the working power supply 5, and a potential difference is generated between the two electrodes 9.

[0035] An RF coil 16 is installed behind the insulating shell 7 and sleeved on the outside of the inner liner tube 8. The RF coil 16 is used to emit pulses of a specific frequency to cause the protons of the polarized material to resonate. A fixed shell is installed at the top of the insulating shell 7. The fixed shell contains a working power supply 5, which is used to power the entire device. In addition, the device can also be powered by an external power supply. A connector 3 is installed at the top of the fixed shell. The connector 3 is connected to the RF coil 16 through a receiving line 4. A converter 1 is installed at the top of the connector 3. Data is transmitted between the connector 3 and the converter 1 via wired or wireless means. A control panel 2 is installed on the converter 1 for controlling the entire device.

[0036] In use, the power supply 5 provides alternating current to the excitation coil 13. Water then enters and first contacts the rotating blade 23 to generate a vortex. At the same time, the ultrasonic device 21 is activated and the ultrasonic waves are applied to the water through the transmitter 22 to generate a cavitation effect. The vortex formed by the rotating blade 23 concentrates impurities in the water towards the center. The transmitter 22 is installed at the bottom of the inner liner tube 8, so that the impurities at the bottom and in the middle of the inner liner tube 8 are impacted to the top under the combined action of the vortex and cavitation effect. The cavitation effect can also play a defoaming role and separate oil in the water, thereby avoiding the impact of oil and bubbles on the accuracy of subsequent detection.

[0037] The sewage pump 17 is started, and with the cooperation of the metering valve 20, the mixture of air bubbles and oil stains at the top of the inner liner pipe 8 is quantitatively extracted and enters the oil stain detector 19 through the conduit 18 for oil stain content detection. Since the extraction process is quantitative, it will not have much impact on the flow rate in the pipeline. At the same time, the oil stain content obtained can be determined according to the extraction amount of the metering valve 20 to determine the corresponding safe range. Finally, the sewage containing oil bubbles is collected and discharged after treatment.

[0038] The ultrasonic waves generated inside the inner liner tube 8 can clean the tube wall of the inner liner tube 8, thereby preventing a small amount of impurities from adhering to the tube wall surface during long-term use and avoiding affecting the accuracy of subsequent testing.

[0039] Before entering the detection range, the water flow passes through the uniform magnetic field generated by the permanent magnet block 15 inside the shielding shell 14. When the fluid passes through, magnetic materials such as rust are polarized by this magnetic field, reaching a stable magnetization state. At this time, most of the air bubbles and oil stains in the water flow entering the detection area are removed, and a small portion remains above the pipe, without interfering with the electrode 9. The magnetic impurities such as rust are in a stable magnetization state, and the flow velocity distribution is more regular. Under these optimized conditions, the Faraday induction voltage signal measured by the electromagnetic flowmeter has a high signal-to-noise ratio and good stability. After passing through the detection area, the polarized impurities enter the working range of the radio frequency coil 16. The radio frequency coil 16 emits pulses of a specific frequency, causing the protons of the polarized material to resonate. After the pulse stops, the radio frequency coil 16 receives the relaxation signal of the protons and transmits the data through the receiving line 4 to the connector 3, which then enters the converter 1 to analyze the relaxation spectrum. Finally, the content of internal rust and the types and contents of other impurities can be identified.

[0040] In the detection area, the excitation coil 13 is installed inside the resonant cavity 11, and the neck 12 below the resonant cavity 11 passes through the magnetic boot 10, with the neck 12 aligned with the detection area.

[0041] The magnetic shoe 10 can shape the magnetic field generated by the excitation coil 13 into a magnetic field that is uniformly distributed and has a constant direction in the detection area, thereby obtaining a stable and linear measurement signal. In addition, in conjunction with the resonant cavity 11, it can constrain the magnetic field lines generated by the coil and reduce the leakage of the magnetic field to the outside. This allows the magnetic field generated by the excitation coil 13 to act more concentratedly on the inside of the inner liner tube 8, improving the accuracy of detection and making it easier to capture signals from low-concentration rust and impurities.

[0042] Furthermore, the neck 12, in conjunction with the enveloping magnetic boot 10, can more effectively receive the noise and vibration generated by the water flow. After the noise and vibration enter the resonant cavity 11, they will be absorbed, reducing signal interference to the detection area of ​​the electrode 9.

[0043] Because an alternating current is applied to the excitation coil 13 to generate an alternating magnetic field, positive and negative ions are separated by the Lorentz force when passing through the magnetic field. Therefore, a potential difference is generated between the two electrodes 9, which, together with the known pipe cross-section, allows for the calculation of the flow rate. The alternating magnetic field avoids the formation of a fixed magnetic field due to concentrated dirt, solves the problem of metal fatigue during long-term operation, increases anti-interference capabilities, and improves detection accuracy.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electromagnetic flowmeter with water quality monitoring function, comprising an inner liner (8), characterized in that, A rotating blade (23) is installed on the front side of the inner liner tube (8). An ultrasonic component is provided on the lower front end of the inner liner tube (8) to act on the fluid inside. An insulating shell (7) is wrapped around the middle section of the inner liner tube (8). An excitation coil (13) is provided on the upper and lower sides of the inner liner tube (7). Electrodes (9) are installed on both the left and right sides of the middle section of the inner liner tube (8). An oil stain detection mechanism is provided on one side of the top of the insulating shell (7). A shielding shell (14) is provided on the front side of the insulating shell (7) and fitted on the outside of the inner liner tube (8). A permanent magnet block (15) arranged in a ring is installed inside the shielding shell (14). An radio frequency coil (16) is provided on the rear side of the insulating shell (7) and fitted on the outside of the inner liner tube (8). A data analysis mechanism connected to the radio frequency coil (16) is provided on the top of the insulating shell (7). The ultrasonic component includes an ultrasonic device (21) fixedly installed on the lower front end of the inner liner tube (8), and the working end of the ultrasonic device (21) is connected to a transmitter (22), which is installed on the lower front side inside the inner liner tube (8). Magnetic boots (10) are fixedly installed on both the upper and lower sides of the middle position of the inner liner tube (8). A resonant cavity (11) is detachably installed on the side of the magnetic boot (10) away from the inner liner tube (8). The resonant cavity (11) and the magnetic boot (10) are both located inside the insulating shell (7). The excitation coil (13) is located inside the resonant cavity (11) and an alternating current is passed through it to generate an alternating magnetic field. A neck (12) is provided on the side of the resonant cavity (11) near the inner liner tube (8). The neck (12) passes through the magnetic boot (10) and is aligned with the detection area in the inner liner tube (8).

2. The electromagnetic flowmeter with water quality monitoring function according to claim 1, characterized in that, Both ends of the inner liner (8) are fitted with flanges (6) for connecting to external pipes.

3. The electromagnetic flowmeter with water quality monitoring function according to claim 1, characterized in that, The magnetic boots (10) are arched and the two magnetic boots (10) are mirror symmetrical.

4. The electromagnetic flowmeter with water quality monitoring function according to claim 1, characterized in that, The oil stain detection mechanism includes an oil stain detector (19) fixedly installed on the top of the isolation shell (7). A sewage pump (17) is installed on the front side of the isolation shell (7) at the top of the inner liner pipe (8). The output end of the sewage pump (17) is connected to the input end of the oil stain detector (19) through a conduit (18). The input end of the sewage pump (17) is located at the top inside the inner liner pipe (8), and a metering valve (20) is installed at the input end of the sewage pump (17).

5. The electromagnetic flowmeter with water quality monitoring function according to claim 4, characterized in that, The output of the oil stain detector (19) is connected to an external collection device.

6. The electromagnetic flowmeter with water quality monitoring function according to claim 1, characterized in that, The data analysis unit includes a fixed shell installed on the top of the insulating shell (7), a connector (3) is installed on the top of the fixed shell, the connector (3) is connected to the radio frequency coil (16) through a receiving line (4), a converter (1) is installed on the top of the connector (3), and the connector (3) and the converter (1) transmit data through wired or wireless means.

7. The electromagnetic flowmeter with water quality monitoring function according to claim 6, characterized in that, The converter (1) is equipped with a control panel (2) for controlling the entire device.

8. The electromagnetic flowmeter with water quality monitoring function according to claim 6, characterized in that, The fixed shell is equipped with a working power supply (5), which is used to supply power to the entire device.

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