Electromagnetic water meter for improving low flow measurement performance and method of use

Abstract

The application discloses an electromagnetic water meter capable of improving small-flow measurement performance and an application method, and relates to the technical field of flow measurement. The electromagnetic water meter comprises two connecting plates and a measurement part. The measurement part comprises an outer pipeline fixedly installed between the two connecting plates. The method comprises the following steps: S1, an initial state is that the two connecting plates are screw-installed at a required position, a wire is connected between a storage battery and an electromagnetic coil, one end of the wire away from the storage battery is wound and connected on a threaded rod, and the threaded rod is screw-installed on a connecting frame, so that the wire is in contact with the electromagnetic coil. The electromagnetic water meter can measure various flows of water, effectively improves the measurement range of the electromagnetic water meter, is more widely applicable, improves the measurement accuracy of small-flow water, and can store the electric energy generated by the inductance coil in the storage battery, continuously supplies energy to the storage battery, and releases the surplus energy when needed.

Description

Technical Field

[0001] This invention relates to the technical field of flow metering, and more particularly to an electromagnetic water meter and its application method for improving the performance of low flow measurement. Background Technology

[0002] In industrial production and urban water supply systems, electromagnetic water meters are used to measure water flow to understand residents' water usage and implement corresponding energy-saving measures based on the flow rate, such as adjusting the operating time of water-using equipment and improving water use processes, in order to reduce water consumption and costs. Measuring water flow also allows for the determination of each user's water consumption and the implementation of corresponding billing standards. To improve the accuracy and stability of low-flow water measurement, electromagnetic water meters with enhanced low-flow measurement performance are typically used.

[0003] The electromagnetic water meter currently in use, such as the Chinese invention patent with patent number ZL202211648653.1, discloses an electromagnetic water meter including a housing, an electronic control module, a battery module, and a functional module. The housing includes an outer shell and a functional shell. The electronic control module includes an electronic control box and an electronic control cover. The edge of the electronic control cover is provided with a first waterproof groove, and the first waterproof groove is provided with sealant. The battery module includes a battery box and a battery cover. The edge of the battery cover is provided with a second waterproof groove.

[0004] However, this type of electromagnetic water meter still has the following problems:

[0005] 1. This electromagnetic water meter has the problem of insufficient accuracy in detecting small flow rates of water. When a small flow of water passes through the electromagnetic water meter, the water cannot pass through the magnetic field lines, thus preventing the small flow of water from generating an electromotive force and being detected by the sensor, which affects the accuracy of measuring small flow rates of water.

[0006] 2. This electromagnetic water meter has the problem of poor battery life. When the battery power is low, it affects the strength of the magnetic field lines, causing the electromotive force generated in the water flow to decrease, which affects the accuracy of water flow measurement. At the same time, the battery replacement procedure inside the electromagnetic water meter is cumbersome.

[0007] Therefore, there is an urgent need to design an electromagnetic water meter and its application method to improve the performance of low-flow measurement and solve the above problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an electromagnetic water meter and its application method that improve the performance of low-flow measurement, solving the problems mentioned in the background art of insufficient accuracy in detecting low-flow water data and poor battery life.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetic water meter with improved performance for measuring small flow rates, comprising:

[0010] Two connecting disks;

[0011] The measuring unit includes an outer pipe fixedly installed between two connecting plates, a guide pipe fixedly installed inside the outer pipe with a protruding bottom, multiple soft irons fixedly installed on the guide pipe, an electromagnetic coil wound around the guide pipe with the soft irons located between the guide pipe and the electromagnetic coil, a connecting structure installed on the guide pipe, a support ring fixedly connected to the guide pipe, a function box fixedly installed on the support ring, a cover snapped onto the function box, and an adjustment structure installed on the function box.

[0012] The energy storage unit includes an anti-electromagnetic interference plate fixedly installed in a functional box. A rotating shaft is rotatably installed on the anti-electromagnetic interference plate. A turbine is fixedly installed at the lower end of the rotating shaft and is located inside a guide tube. Multiple support frames are fixedly installed on the anti-electromagnetic interference plate. Two corresponding support frames form a group, and a power generation structure is installed on each group of support frames.

[0013] The dust removal section includes a connecting plate fixedly installed inside the function box. The connecting plate has a groove. Two sets of PLC boards are fixedly installed on the connecting plate. A dust suction structure is installed on the rotating shaft. Two dustproof plates are symmetrically fixedly installed on the connecting plate. Two scraping structures are installed on the connecting plate. A sliding structure is installed between each of the two scraping structures and the connecting plate.

[0014] Preferably, the connection structure includes a fixed frame, a connecting frame, and a threaded rod. The fixed frame is fixedly installed on the guide pipe, and the connecting frame is fixedly installed inside the guide pipe. A threaded groove is opened in the connecting frame, and a threaded rod is threadedly installed in the threaded groove of the connecting frame.

[0015] Preferably, the control structure includes adjustment buttons, a display screen, and a fixing plate. The fixing plate is fixedly installed inside the function box, and the fixing plate is provided with multiple adjustment buttons for adjusting the precision. The display screen is fixedly installed on the fixing plate.

[0016] Preferably, the power generation structure includes a magnet, a battery, a passive helical gear, wires, a rotor, conductive blocks, and an active helical gear. Two magnets are fixedly installed on a set of support frames located on the same side. An active helical gear is fixedly installed on the rotating shaft. A rotor is rotatably installed on the anti-electromagnetic interference plate via two support rods. An inductor coil is wound around the rotor. A passive helical gear that meshes with the active helical gear is fixedly installed at one end of the rotor. Two batteries are fixedly installed on the anti-electromagnetic interference plate. Wires are connected to the positive and negative terminals of the two batteries, respectively. Conductive blocks are fixedly connected to multiple wires, and multiple conductive blocks are in contact with the inductor coils. Wires are fixedly connected between the two batteries and the electromagnetic coil.

[0017] Preferably, the dust-collecting structure includes fan blades, a dust collection box, and a roller. The roller is fixedly installed on the rotating shaft, and multiple fan blades are fixedly installed on the roller. The dust collection box is fixedly installed in the groove on the connecting plate.

[0018] Preferably, the scraping structure includes a gear, a rack, a scraper, and a return spring. A roller is mounted on the rotating shaft via a one-way bearing, and a gear is fixedly mounted on the roller. A return spring is fixedly connected to the dustproof plate, and a scraper is fixedly connected to the return spring. A rack that meshes with the gear is fixedly mounted on the scraper.

[0019] Preferably, the sliding structure includes a fixed block, a slider, and a groove. The fixed block is fixedly installed on the connecting plate, the slider is fixedly installed on the fixed block, and the bottom of the rack has a groove that cooperates with the slider.

[0020] Preferably, the guide tube is made of food-grade plastic, and the two connecting discs have multiple straight grooves.

[0021] Preferably, the ash collection box has a through hole, and a filter screen is fixedly installed in the through hole.

[0022] An application method for improving the performance of electromagnetic water meters for low-flow-rate measurements includes the following steps:

[0023] S1. Initial state: Two connecting discs are threadedly installed in the required position. A wire is connected between the battery and the electromagnetic coil. The end of the wire away from the battery is wound and connected to the threaded rod. The threaded rod is then threadedly installed on the connecting frame so that the wire is in contact with the electromagnetic coil.

[0024] S2. The battery allows current to flow through the electromagnetic coil via wires. When water flows through the electromagnetic coil, the conductive material in the water acts as a conductor. When the water flows through the magnetic field, an induced electromotive force is generated in the electromagnetic coil.

[0025] S3. The induced electromotive force is proportional to the water flow velocity. The PLC board is used to receive, process and analyze the induced electromotive force data. It can process the induced electromotive force and calculate, record or analyze the water flow data. Thus, the water flow rate is measured by detecting the magnitude of the induced electromotive force. The water flow rate is displayed on the screen for easy viewing by the operator.

[0026] S4. When a large flow of water passes through the guide pipe, the flow of water can drive the turbine inside the guide pipe to rotate. The rotation of the turbine drives the rotating shaft to rotate, thereby realizing the rotation of the active helical gear. The rotation of the active helical gear drives the two passive helical gears meshing with it to rotate, thereby realizing the rotor rotating inside the two magnets, thus realizing the rotation of the inductor coil in the magnetic field.

[0027] S5. When the inductor rotates in the magnetic field, the magnetic flux changes. The changing magnetic flux will generate an induced electromotive force in the inductor. The induced electromotive force continuously supplies power to the battery through the conductive block and wires, extending the service life of the electromagnetic water meter.

[0028] S6. When water flows through the guide pipe, the rotating shaft rotates, driving the gear to rotate and simultaneously moving the rack meshing with it, thereby moving the scraper to clean the dust on the connecting plate. When no water flows through the guide pipe, the rotating shaft stops rotating. At this time, due to the elastic deformation characteristics of the return spring, the scraper returns to its original position. At this time, the rack will drive the gear to rotate in the opposite direction. At this time, the one-way bearing can prevent the rotating shaft from rotating.

[0029] S7. When the rotating shaft rotates, it drives the roller to rotate simultaneously, so that multiple fan blades can rotate at the same time. When the fan blades rotate, a negative pressure is generated on one side to achieve the dust suction effect. The dust on the connecting plate is absorbed and collected in the dust box. When the gear stops rotating, the return spring has elastic deformation characteristics, which pulls the scraper back, so that the scraper returns to its original position, which is convenient for the next dust cleaning. At the same time, the two dustproof plates can prevent dust from falling onto the PLC board and protect the PLC board.

[0030] S8. When a small flow of water passes through the guide pipe, the protrusions inside the guide pipe cause the water to flow out from both sides of the protrusions. This causes the magnetic field lines inside the guide pipe to generate an electromotive force in the small flow of water, which is detected by the sensor on the PLC board. The data is then processed and calculated by the PLC board and transmitted to the terminal.

[0031] This invention provides an electromagnetic water meter and its application method for improving the performance of low-flow-rate measurements. It has the following beneficial effects:

[0032] 1. This invention has the advantage of better performance in measuring small flow rates of water. By setting the shape of the guide tube and making the bottom of the guide tube convex, the water flow can still cut the magnetic field lines and generate an induced electromotive force when passing through the guide tube. This allows for more accurate measurement of small flow rates of water, effectively improving the measurement range of the electromagnetic water meter, increasing the accuracy of measuring small flow rates of water, and making it more widely applicable.

[0033] 2. This invention has the advantage of more accurate measurement. By setting the outer pipe as an anti-electromagnetic interference material, its good anti-interference ability can effectively resist external interference signals and reduce the interference of magnets on the magnetic field lines inside the guide pipe, making the electromagnetic water meter measurement results more accurate, the performance more stable, and improving the accuracy of measurement.

[0034] 3. This invention has the advantage of high stability. By using a battery and an inductor coil together, the inductor coil generates an induced electromotive force by changing the magnetic flux when it rotates in a magnetic field, thereby storing electrical energy in the battery and continuously supplying power to the battery. By storing excess energy, it can be released when needed, thereby extending the battery's service life and saving energy.

[0035] 4. This invention has the advantage of automatic dust removal. Through the cooperation of the scraper, rack, and gear, the rotation of the gear drives the rack to move, thereby realizing the movement of the scraper to clean the inside of the electromagnetic water meter, avoiding dust from affecting the use of the electromagnetic water meter, improving the accuracy of measurement, and reducing the possibility of unstable operation of the electromagnetic water meter due to internal problems.

[0036] In summary, this invention can measure water flow rates of various sizes, effectively improving the measurement range of the electromagnetic water meter and making it more widely applicable. It also improves the measurement accuracy for small flow rates and can store the electrical energy generated by the inductor coil in a battery, providing continuous power to the battery. By storing excess energy and releasing it when needed, it extends the service life of the electromagnetic water meter. Furthermore, it allows for internal cleaning of the electromagnetic water meter, preventing dust from affecting its operation and improving measurement accuracy. Attached Figure Description

[0037] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0038] Figure 1 This is a schematic diagram of the structure of an electromagnetic water meter and its application method for improving the performance of low flow rate measurement proposed in this invention;

[0039] Figure 2 for Figure 1 Exploded view of the central positioning disk section;

[0040] Figure 3 for Figure 1 Schematic diagram of the internal structure of the middle functional box;

[0041] Figure 4 for Figure 3 Schematic diagram of the electromagnetic coil section;

[0042] Figure 5 for Figure 4 Schematic diagram of the middle fixed frame structure;

[0043] Figure 6 for Figure 3 Schematic diagram of the middle support frame structure;

[0044] Figure 7 for Figure 6 Exploded view of the central support frame structure;

[0045] Figure 8 for Figure 3 Schematic diagram of the PLC board structure;

[0046] Figure 9 for Figure 8 Exploded view of the middle rack section;

[0047] Figure 10 for Figure 9 Schematic diagram of the middle slider section.

[0048] In the diagram: 1. Connecting plate, 2. Guide pipe, 3. External pipe, 4. Functional box, 5. Cover, 6. Soft iron, 7. Electromagnetic coil, 8. Support ring, 9. Adjustment button, 10. Display screen, 11. Anti-electromagnetic interference board, 12. Dustproof plate, 13. PLC board, 14. Support frame, 15. Magnet, 16. Battery, 17. Fixing frame, 18. Connecting frame, 19. Threaded rod, 20. Turbine, 21. Rotating shaft, 22. Inductor coil, 23. Passive helical gear, 24. Wire, 25. Rotor, 26. Conductive block, 27. Gear, 28. Rack, 29. Scraper, 30. Return spring, 31. Fixing block, 32. Slider, 33. Connecting plate, 34. Fixing plate, 35. Fan blade, 36. Dust collection box, 37. Slide groove, 38. Active helical gear, 39. Roller. Detailed Implementation

[0049] 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.

[0050] Reference Figures 1-2 , Figures 4-5An electromagnetic water meter with improved performance for measuring small flow rates includes two connecting discs 1 and a measuring unit. The measuring unit includes an outer pipe 3 fixedly installed between the two connecting discs 1. A flow guide pipe 2 is fixedly installed inside the outer pipe 3. Multiple soft irons 6 are fixedly installed on the flow guide pipe 2. An electromagnetic coil 7 is wound and connected on the flow guide pipe 2, and the soft irons 6 are located between the flow guide pipe 2 and the electromagnetic coil 7. A connecting structure is installed on the flow guide pipe 2.

[0051] The guide tube 2 is a food-grade plastic tube, and the bottom of the guide tube 2 is convex. Multiple straight grooves are opened on the two connecting discs 1.

[0052] The outer pipe 3 is made of anti-electromagnetic interference material, which has good anti-interference ability and can effectively resist external interference signals, making the electromagnetic water meter measurement results more accurate and improving measurement precision.

[0053] The multiple grooves on the connecting plate 1 facilitate the installation of the electromagnetic water meter in the desired position via a screw, thereby measuring the water flow rate and further improving the practicality of the electromagnetic water meter.

[0054] The guide pipe 2 is made of food-grade plastic to ensure the safety of drinking water and avoid pollution of water bodies. The bottom of the guide pipe 2 is convex, so that the lowest point of the guide pipe 2 is still between the magnetic field lines generated by multiple soft iron 6. This allows small flow rates of water to still cut the magnetic field lines and generate an induced electromotive force when passing through the guide pipe 2, thereby measuring the water flow rate. This effectively improves the measurement range of the electromagnetic water meter, making it more widely applicable and improving its measurement performance for small flow rates of water.

[0055] The connection structure includes a fixed frame 17, a connecting frame 18, and a threaded rod 19. The fixed frame 17 is fixedly installed on the guide pipe 2, and the connecting frame 18 is fixedly installed inside the guide pipe 2. A threaded groove is opened inside the connecting frame 18, and a threaded rod 19 is threadedly installed in the threaded groove of the connecting frame 18.

[0056] In use, the threaded rod 19 is threaded into the connecting bracket 18, thereby connecting the wire 24 to the electromagnetic coil 7, energizing the electromagnetic coil 7, making the electromagnetic coil 7 a closed circuit, and generating a magnetic field.

[0057] Reference Figure 3 A support ring 8 is fixedly connected to the guide pipe 2, a function box 4 is fixedly installed on the support ring 8, a cover 5 is snapped onto the function box 4, and an adjustment structure is installed on the function box 4.

[0058] The control structure includes adjustment buttons 9, display screen 10 and fixing plate 34. Fixing plate 34 is fixedly installed inside function box 4. Multiple adjustment buttons 9 for adjusting precision are provided on fixing plate 34. Display screen 10 is fixedly installed on fixing plate 34.

[0059] The display screen 10 is used to display the current water flow rate, as well as the total cumulative flow rate since the installation of the electromagnetic water meter. It can also display the current operating status of the electromagnetic water meter, such as whether it is working normally or whether there is any abnormality. This is existing technology and will not be described in detail here.

[0060] The adjustment button 9 can be used for zero-point calibration to ensure that the water meter reading is zero when no water is flowing. It can also be used to switch the information on the display screen 10, such as different measurement units or other relevant information. This is existing technology and will not be described in detail here.

[0061] Functional box 4 is a functional name here, used to cooperate with other structures to realize the control function. Other corresponding technical features in the text are also named in this way for easy distinction and understanding.

[0062] Reference Figures 6-7 The energy storage unit includes an anti-electromagnetic interference plate 11 fixedly installed in the functional box 4. A rotating shaft 21 is rotatably installed on the anti-electromagnetic interference plate 11. A turbine 20 is fixedly installed at the lower end of the rotating shaft 21 and the turbine 20 is located in the guide pipe 2. Multiple support frames 14 are fixedly installed on the anti-electromagnetic interference plate 11. Two corresponding support frames 14 form a group, and a power generation structure is installed on each group of support frames 14.

[0063] The power generation structure includes a magnet 15, a battery 16, a passive helical gear 23, a wire 24, a rotor 25, a conductive block 26, and an active helical gear 38. Two magnets 15 are fixedly installed on a set of support frames 14 on the same side. An active helical gear 38 is fixedly installed on a rotating shaft 21. A rotor 25 is rotatably installed on an anti-electromagnetic interference plate 11 via two support rods. An inductor coil 22 is wound around the rotor 25. A passive helical gear 23 that meshes with the active helical gear 38 is fixedly installed at one end of the rotor 25.

[0064] Two support rods are fixedly installed on the anti-electromagnetic interference plate 11. A rotor 25 is rotatably installed on each of the two support rods. A passive helical gear 23 that meshes with the active helical gear 38 is fixedly installed at one end of each rotor 25.

[0065] When the water flow drives the turbine 20 to rotate, the turbine 20 drives the rotating shaft 21 to rotate, thereby realizing the rotation of the active helical gear 38. The rotation of the active helical gear 38 drives the two passive helical gears 23 meshing with it to rotate, thereby realizing the rotation of the rotor 25 within the two magnets 15, thereby realizing the rotation of the inductor coil 22 in the magnetic field, thus causing the magnetic flux to change.

[0066] Two batteries 16 are fixedly installed on the anti-electromagnetic interference board 11. The positive and negative terminals of the two batteries 16 are respectively connected to wires 24. Conductive blocks 26 are fixedly connected to multiple wires 24, and multiple conductive blocks 26 are respectively in contact with inductor coils 22. Wires 24 are fixedly connected between the two batteries 16 and the electromagnetic coil 7.

[0067] The changing magnetic flux will generate an induced electromotive force in the inductor coil 22. The induced electromotive force continuously supplies power to the storage battery 16 through the conductive block 26 and the wire 24. The service life of the electromagnetic water meter is extended by continuously supplying power to the storage battery 16.

[0068] The positive and negative terminals of the storage battery 16 are connected to the electromagnetic coil 7 by a wire 24 through a connection structure, making the electromagnetic coil 7 a closed circuit. At the same time, multiple soft irons 6 generate a magnetic field. The closed electromagnetic coil 7 is affected by the magnetic field and moves to cut magnetic field lines under the action of water flow, thereby generating an induced electromotive force.

[0069] Reference Figures 8-10 The dust removal section includes a connecting plate 33 fixedly installed in the function box 4. The connecting plate 33 has a groove. Two sets of PLC plates 13 are fixedly installed on the connecting plate 33. A dust suction structure is installed on the rotating shaft 21. Two dustproof plates 12 are symmetrically fixedly installed on the connecting plate 33. A scraping structure is installed on the connecting plate 33. A sliding structure is installed between the two scraping structures and the connecting plate 33.

[0070] One set of PLC boards 13 is used to store data from the electromagnetic water meter, and the other set of PLC boards 13 is used to detect data, process the induced electromotive force, and calculate, record or analyze water flow data. The water flow is measured by detecting the magnitude of the induced electromotive force. Finally, the data is transmitted to the background processing system via PLC board 13, and the calculated water flow data is displayed on the display screen 10. The specific internal structure and working principle of the background processing system are existing technologies and will not be described in detail here.

[0071] The dust collection structure includes fan blades 35, dust collection box 36 and roller 39. Roller 39 is fixedly installed on rotating shaft 21, and multiple fan blades 35 are fixedly installed on roller 39. Dust collection box 36 is fixedly installed in the groove on connecting plate 33.

[0072] Multiple fan blades 35 are located in the dust collection box 36. When the rotating shaft 21 rotates, it drives the roller 39 to rotate simultaneously, so that multiple fan blades 35 can rotate at the same time. The rotation of the fan blades 35 realizes the suction function, thereby adsorbing the dust on the connecting plate 33. The dust collection box 36 is used to collect the adsorbed dust.

[0073] The dust collection box 36 has a through hole, and a filter screen is fixedly installed in the through hole. The fan blade 35 draws dust into the dust collection box 36, and finally falls below the filter screen. The filter screen can prevent dust from flowing back and prevent it from falling back onto the connecting plate 33 with the airflow.

[0074] The scraping structure includes a gear 27, a rack 28, a scraper 29, and a return spring 30. A roller 39 is mounted on the rotating shaft 21 via a one-way bearing. A gear 27 is fixedly mounted on the roller 39. A return spring 30 is fixedly connected to the dustproof plate 12. A scraper 29 is fixedly connected to the return spring 30. A rack 28 that meshes with the gear 27 is fixedly mounted on the scraper 29.

[0075] The dustproof plate 12 can prevent dust from falling onto the PLC board 13, avoiding the impact of dust on the normal operation of the PLC board, making the measurement more accurate, and also extending the service life of the PLC board.

[0076] When roller 39 rotates forward, the one-way bearing can rotate freely. When roller 39 rotates backward, the one-way bearing will lock to prevent the rotating shaft 21 from rotating when roller 39 rotates backward.

[0077] Household water flows intermittently. When the faucet is turned on, water flows through the guide pipe 2. When it is turned off, no water flows through the guide pipe 2. When no water flows through, the rotating shaft 21 stops rotating. At this time, due to the elastic deformation characteristics of the return spring 30, the scraper 29 is restored to its original position. At this time, the rack 28 will drive the gear 27 to rotate in the opposite direction. At this time, the one-way bearing can prevent the rotating shaft 21 from rotating.

[0078] When gear 27 rotates, it drives two scrapers 29 to move through two meshing racks 28, thereby scraping off the dust on the connecting plate 33 to prevent the dust from affecting the normal operation of the PLC board. At the same time, with the help of the dust suction structure, the scraped dust is absorbed into the dust collection box 36. When gear 27 stops rotating, due to the elastic deformation characteristics of the return spring 30, the scraper 29 can return to the initial position, which is convenient for the next scraping.

[0079] The sliding structure includes a fixed block 31, a slider 32 and a groove 37. The fixed block 31 is fixedly installed on the connecting plate 33, and the slider 32 is fixedly installed on the fixed block 31. The bottom of the rack 28 is provided with a groove 37 that cooperates with the slider 32.

[0080] The slider 32 is slidably installed in the slide groove 37, which ensures that the rack 28 can move normally while limiting the rack 28, so that the scraper 29 can effectively clean the dust on the connecting plate 33.

[0081] The slider 32 can be set as a trapezoid, and the groove 37 can be set as a trapezoidal groove. The trapezoidal groove has good structural stability and can better play the role of limiting, ensuring that the scraper 29 can move back and forth smoothly on the connecting plate 33.

[0082] An application method for improving the performance of electromagnetic water meters for low-flow-rate measurements includes the following steps:

[0083] S1. Initial state: Two connecting discs 1 are threadedly installed in the required position. A wire 24 is connected between the battery 16 and the electromagnetic coil 7. The end of the wire 24 away from the battery 16 is wound and connected to the threaded rod 19. The threaded rod 19 is then threadedly installed on the connecting bracket 18 so that the wire 24 is in contact with the electromagnetic coil 7.

[0084] S2. The battery 16 allows current to flow through the electromagnetic coil 7 via the wire 24. When water flows through the electromagnetic coil 7, the conductive substances contained in the water act as conductors, such as dissolved substances or impurities in the water. When the water flows through the magnetic field, an induced electromotive force is generated in the electromagnetic coil 7.

[0085] S3. The induced electromotive force is proportional to the water flow velocity. The PLC board 13 is used to receive, process and analyze the induced electromotive force data. It can process the induced electromotive force and calculate, record or analyze the water flow data, so as to measure the water flow by detecting the magnitude of the induced electromotive force. The display screen 10 shows the water flow, which is convenient for operators to view.

[0086] S4. When a large flow of water passes through the guide pipe 2, the flow of water can drive the turbine 20 inside the guide pipe 2 to rotate. The rotation of the turbine 20 drives the rotating shaft 21 to rotate, thereby realizing the rotation of the active helical gear 38. The rotation of the active helical gear 38 drives the two passive helical gears 23 meshing with it to rotate, thereby realizing the rotation of the rotor 25 within the two magnets 15, thereby realizing the rotation of the inductor coil 22 in the magnetic field.

[0087] S5. When the inductor coil 22 rotates in the magnetic field, the magnetic flux changes. The changing magnetic flux will generate an induced electromotive force in the inductor coil 22. The induced electromotive force continuously supplies power to the storage battery 16 through the conductive block 26 and the wire 24, thus extending the service life of the electromagnetic water meter.

[0088] S6. When water flows through the guide pipe 2, the rotating shaft 21 rotates, driving the gear 27 to rotate, and simultaneously driving the rack 28 meshing with it to move, thereby realizing the movement of the scraper 29 to clean the dust on the connecting plate 33. When no water flows through the guide pipe 2, the rotating shaft 21 stops rotating. At this time, due to the elastic deformation characteristics of the return spring 30, the scraper 29 is restored to its original position. At this time, the rack 28 will drive the gear 27 to rotate in the opposite direction. At this time, the one-way bearing can prevent the rotating shaft 21 from rotating.

[0089] S7. When the rotating shaft 21 rotates, it drives the roller 39 to rotate simultaneously, so that multiple fan blades 35 can rotate at the same time. When the fan blades 35 rotate, a negative pressure is generated on one side to achieve the dust suction effect. The dust on the connecting plate 33 is absorbed into the dust collection box 36. When the gear 27 stops rotating, the return spring 30 has elastic deformation characteristics, which pulls the scraper 29 back, so that the scraper 29 returns to its original position, which is convenient for the next dust cleaning. At the same time, the two dustproof plates 12 can prevent dust from falling onto the PLC board 13 and protect the PLC board 13.

[0090] S8. When a small flow of water passes through the guide pipe 2, the protrusions inside the guide pipe 2 cause the water to flow out from both sides of the protrusions. This causes the magnetic field lines inside the guide pipe 2 to generate an electromotive force in the small flow of water, which is detected by the sensor on the PLC board 13. The data is then processed and calculated by the PLC board 13 and transmitted to the terminal.

[0091] 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 water meter with improved performance for measuring small flow rates, characterized in that, include: Two connecting disks (1); The measuring unit includes an outer pipe (3) fixedly installed between two connecting plates (1), a guide pipe (2) fixedly installed inside the outer pipe (3), and the bottom of the guide pipe (2) is convex. Multiple soft irons (6) are fixedly installed on the guide pipe (2), an electromagnetic coil (7) is wound around the guide pipe (2), and the soft irons (6) are located between the guide pipe (2) and the electromagnetic coil (7). A connecting structure is installed on the guide pipe (2), a support ring (8) is fixedly connected to the guide pipe (2), a function box (4) is fixedly installed on the support ring (8), a cover (5) is snapped onto the function box (4), and an adjustment structure is installed on the function box (4). The energy storage unit includes an anti-electromagnetic interference plate (11) fixedly installed in the functional box (4). A rotating shaft (21) is rotatably installed on the anti-electromagnetic interference plate (11). A turbine (20) is fixedly installed at the lower end of the rotating shaft (21), and the turbine (20) is located in the guide pipe (2). Multiple support frames (14) are fixedly installed on the anti-electromagnetic interference plate (11). Two corresponding support frames (14) form a group. A power generation structure is installed on each group of support frames (14). The dust removal section includes a connecting plate (33) fixedly installed in the functional box (4). The connecting plate (33) has a groove. Two sets of PLC plates (13) are fixedly installed on the connecting plate (33). A dust suction structure is installed on the rotating shaft (21). Two dustproof plates (12) are symmetrically fixedly installed on the connecting plate (33). Two scraping structures are installed on the connecting plate (33). A sliding structure is installed between the two scraping structures and the connecting plate (33). The connection structure includes a fixed frame (17), a connecting frame (18), and a threaded rod (19). The fixed frame (17) is fixedly installed on the guide pipe (2), and the connecting frame (18) is fixedly installed inside the guide pipe (2). The connecting frame (18) has a threaded groove, and the threaded rod (19) is threadedly installed in the threaded groove of the connecting frame (18). The control structure includes adjustment buttons (9), a display screen (10) and a fixing plate (34). The fixing plate (34) is fixedly installed inside the function box (4). Multiple adjustment buttons (9) for adjusting precision are provided on the fixing plate (34). The display screen (10) is fixedly installed on the fixing plate (34). The power generation structure includes a magnet (15), a battery (16), a passive helical gear (23), a wire (24), a rotor (25), a conductive block (26), and an active helical gear (38). Two magnets (15) are fixedly installed on a set of support frames (14) on the same side. An active helical gear (38) is fixedly installed on the rotating shaft (21). A rotor (25) is rotatably installed on the anti-electromagnetic interference plate (11) via two support rods. An inductor coil (22) is wound and connected on the rotor (25). One end of the rotor (25) is fixedly installed with a passive helical gear (23) that meshes with the active helical gear (38). Two batteries (16) are fixedly installed on the anti-electromagnetic interference plate (11). The positive and negative terminals of the two batteries (16) are respectively connected to wires (24). Conductive blocks (26) are fixedly connected to multiple wires (24), and multiple conductive blocks (26) are respectively in contact with inductor coils (22). Wires (24) are fixedly connected between the two batteries (16) and the electromagnetic coil (7). The dust collection structure includes fan blades (35), dust collection box (36) and roller (39). The roller (39) is fixedly installed on the rotating shaft (21), and multiple fan blades (35) are fixedly installed on the roller (39). The dust collection box (36) is fixedly installed in the groove on the connecting plate (33). The scraping structure includes a gear (27), a rack (28), a scraper (29), and a return spring (30). A roller (39) is mounted on the rotating shaft (21) via a one-way bearing. A gear (27) is fixedly mounted on the roller (39). A return spring (30) is fixedly connected to the dustproof plate (12). A scraper (29) is fixedly connected to the return spring (30). A rack (28) that meshes with the gear (27) is fixedly mounted on the scraper (29).

2. The electromagnetic water meter for improving low-flow-rate measurement performance according to claim 1, characterized in that, The sliding structure includes a fixed block (31), a slider (32) and a groove (37). The fixed block (31) is fixedly installed on the connecting plate (33), and the slider (32) is fixedly installed on the fixed block (31). The bottom of the rack (28) is provided with a groove (37) that cooperates with the slider (32).

3. The electromagnetic water meter for improving low-flow-rate measurement performance according to claim 1, characterized in that, The guide tube (2) is made of food-grade plastic, and multiple straight grooves are provided on the two connecting discs (1).

4. An electromagnetic water meter for improving low-flow-rate measurement performance according to claim 1, characterized in that, The dust collection box (36) has a through hole, and a filter screen is fixedly installed in the through hole.

5. The application method of an electromagnetic water meter for improving the performance of small flow rate measurement according to any one of claims 1-4, characterized in that, Includes the following steps: S1. The initial state is as follows: two connecting discs (1) are threadedly installed in the required position, and a wire (24) is connected between the battery (16) and the electromagnetic coil (7). The end of the wire (24) away from the battery (16) is wound and connected to the threaded rod (19). The threaded rod (19) is then threadedly installed on the connecting frame (18) so that the wire (24) is in contact with the electromagnetic coil (7). S2. The battery (16) allows current to flow through the electromagnetic coil (7) via the wire (24). When water flows through the electromagnetic coil (7), the conductive material contained in the water acts as a conductor. When the water flows through the magnetic field, an induced electromotive force is generated in the electromagnetic coil (7). S3. The induced electromotive force is proportional to the water flow velocity. The PLC board (13) is used to receive, process and analyze the induced electromotive force data. It can process the induced electromotive force and calculate, record or analyze the water flow data, so as to measure the water flow by detecting the magnitude of the induced electromotive force. The display screen (10) shows the water flow, which is convenient for operators to view. S4. When a large flow of water passes through the guide pipe (2), the flow of water can drive the turbine (20) inside the guide pipe (2) to rotate. The rotation of the turbine (20) drives the rotating shaft (21) to rotate, thereby realizing the rotation of the active helical gear (38). The rotation of the active helical gear (38) drives the two passive helical gears (23) meshing with it to rotate, thereby realizing the rotation of the rotor (25) inside the two magnets (15), thereby realizing the rotation of the inductor coil (22) in the magnetic field. S5. When the inductor coil (22) rotates in the magnetic field, the magnetic flux changes. The changing magnetic flux will generate an induced electromotive force in the inductor coil (22). The induced electromotive force will continuously supply power to the storage battery (16) through the conductive block (26) and the wire (24), thus extending the service life of the electromagnetic water meter. S6. When water flows through the guide pipe (2), the rotating shaft (21) rotates, which drives the gear (27) to rotate and moves the rack (28) meshing with it, thereby moving the scraper (29) to clean the dust on the connecting plate (33). When no water flows through the guide pipe (2), the rotating shaft (21) stops rotating. At this time, due to the elastic deformation characteristics of the return spring (30), the scraper (29) is restored to its original position. At this time, the rack (28) will drive the gear (27) to rotate in the opposite direction. At this time, the one-way bearing can prevent the rotating shaft (21) from rotating. S7. When the rotating shaft (21) rotates, it drives the roller (39) to rotate simultaneously, so that multiple fan blades (35) can rotate at the same time. When the fan blades (35) rotate, a negative pressure is generated on one side to achieve the dust suction effect. The dust on the connecting plate (33) is collected in the dust collection box (36). When the gear (27) stops rotating, the return spring (30) has elastic deformation characteristics and pulls back the scraper (29) so that the scraper (29) returns to its original position, which is convenient for the next dust cleaning. At the same time, the two dustproof plates (12) can prevent dust from falling onto the PLC board (13) and protect the PLC board (13). S8. When a small flow of water passes through the guide pipe (2), the water flows out from both sides of the protrusion due to the protrusion in the guide pipe (2). The magnetic field lines in the guide pipe (2) can generate an electromotive force in the small flow of water, which is detected by the sensor on the PLC board (13). Then, the data is processed and calculated by the PLC board (13) and transmitted to the terminal.

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