A battery-powered electromagnetic water meter

Abstract

This application relates to a battery-powered electromagnetic water meter, belonging to the field of electromagnetic water meters. It includes a housing and a flow guide tube. Multiple electromagnetic induction rods are installed inside the flow guide tube. A storage battery is placed on the housing. An automatic valve mechanism is installed on the flow guide tube. The automatic valve mechanism includes a positioning disc rotatably connected inside the flow guide tube. A through hole, concentric with the flow guide tube, is opened in the center of the positioning disc. The through hole is a regular polygon. Multiple baffles are installed on one side of the positioning disc, each baffle corresponding to a side of the regular polygon. A drive assembly is installed on the flow guide tube to drive the baffles to slide towards the center of the through hole to close the through hole and block water flow, or to slide away from the center to open the through hole and allow water to flow. A voltage sensor is connected to the housing to detect the voltage value output by the storage battery. When the detected battery voltage value is less than a preset value, the drive assembly is controlled to drive the baffles to move and close the through hole. This application has the effect of reducing metering errors after the battery power is depleted.

Description

Technical Field

[0001] This application relates to the field of electromagnetic water meters, and more particularly to a battery-powered electromagnetic water meter. Background Technology

[0002] With the increasing scarcity of freshwater resources globally, accurate measurement and management of water consumption are of paramount importance. As a crucial instrument for measuring water consumption, the accuracy, range, reliability, lifespan, functionality, and manufacturing cost of water meters all affect water measurement, water billing, and their value in water control, conservation, and management.

[0003] Electromagnetic water meters are metering instruments specifically designed for the actual needs of water supply and consumption enterprises. They can optimize water supply and consumption and ensure accurate water trade metering and settlement. The principle of electromagnetic water meters is based on Faraday's law of electromagnetic induction. When a conductor or fluid moves through a magnetic field, cutting through the magnetic force, an induced electromotive force is generated at both ends of the conductor or fluid. The induced electromotive force in the fluid is measured by two electrodes located radially opposite each other, and the flow rate is calculated based on the induced electromotive force.

[0004] Electromagnetic water meters are typically powered by electricity. Those installed indoors are usually IC card electric water meters that are directly connected to the power grid. Some devices far from the power grid use electromagnetic water meters that are powered by batteries. When the battery is too low, the water volume cannot be accurately measured, resulting in measurement errors. Summary of the Invention

[0005] To reduce measurement errors after the battery is depleted, this application provides a battery-powered electromagnetic water meter.

[0006] The battery-powered electromagnetic water meter provided in this application adopts the following technical solution: A battery-powered electromagnetic water meter includes a housing and a flow guide tube. The flow guide tube is fixedly connected to the housing and contains multiple electromagnetic induction rods. The housing has a receiving cavity containing a battery for powering the electromagnetic induction rods. An automatic valve mechanism is provided on the flow guide tube. The automatic valve mechanism includes a positioning disc rotatably connected to the flow guide tube. The positioning disc has a through hole concentric with the flow guide tube in its center. The through hole is a regular polygon. Multiple baffles are provided on one side of the positioning disc, each baffle corresponding to one side of the regular polygon. A drive assembly is provided on the flow guide tube to drive the baffles to slide towards the center of the through hole to close the through hole and block water flow, or to slide away from the center to open the through hole and allow water to flow. A voltage sensor is connected to the housing to detect the voltage value output by the battery. When the detected battery voltage value is less than a preset value, the drive assembly is controlled to drive the baffles to move to close the through hole.

[0007] By adopting the above technical solution, when the user uses the device, the battery provides voltage to the electromagnetic induction rod, which contains an induction coil. When water flows through the electromagnetic coil, a magnetic field is generated. This magnetic field passes through the detection coil, thereby generating an electromotive force (EMF) in the detection coil. The magnitude of this EMF is proportional to the water flow rate. Therefore, the water flow rate can be determined by measuring the magnitude of the EMF. The voltage sensor is used to detect the voltage value output by the battery. When the detected battery voltage value is less than the preset value, the drive component is controlled to drive the baffle to close the through hole. When the battery power is too low or depleted, the water flow is prevented from continuing, reducing measurement errors.

[0008] Optionally, the positioning disk has multiple guide grooves corresponding to the baffles, and each baffle is fixedly connected to a sliding column, which is slidably connected to the guide groove.

[0009] By adopting the above technical solution, when the user uses the device, the drive component drives the positioning disk to rotate, which in turn drives the baffle to slide towards or away from the center of the circle through the sliding column, so that the baffle closes the through hole and the guide hole. When the drive component drives the positioning disk to rotate in the opposite direction, it can drive the positioning disk to rotate in the opposite direction, so that the baffle opens the through hole and the guide hole.

[0010] Optionally, the drive assembly includes a stepper motor mounted on the guide tube, a gear fixedly connected to the output shaft of the stepper motor, and a rack fixedly connected to the side of the positioning disk, with the gear and rack meshing.

[0011] By adopting the above technical solution, when the user uses the device, the stepper motor rotates forward, which in turn drives the positioning disk to rotate in one direction via the gear rack and pulley. This drives the baffle to slide towards or away from the center of the circle via the sliding column, thus closing the through hole and the guide hole. When the stepper motor rotates in reverse, it drives the positioning disk to rotate in the opposite direction, thus opening the through hole and the guide hole.

[0012] Optionally, a limiting plate is fixedly connected inside the guide tube on the side of the baffle away from the positioning plate. The center of the limiting plate has a guide hole corresponding to the through hole. A sliding groove is provided on the limiting plate. The sliding groove is inclined along the circumference of the limiting plate. A guide block is fixedly connected on the side of the baffle away from the sliding column. The guide block is inserted into the sliding groove and can slide in the sliding groove.

[0013] By adopting the above technical solution, when the positioning disc rotates, it drives the baffle to slide towards the center, while the guide block slides in the groove, causing the baffle to rotate around the sliding column towards the center, completely closing the through hole and the guide hole. When the positioning disc rotates in the opposite direction, it drives the baffle to slide away from the center, and the guide block slides in the groove, causing the baffle to flip outward around the sliding column, completely opening the through hole and the guide hole without affecting the water flow.

[0014] Optionally, the detection box is equipped with a battery and an electromagnet. The battery powers the electromagnet and is controlled by a voltage sensor. When the voltage sensor detects that the battery voltage is less than a preset value, it controls the battery to power the electromagnet. A limiting rod is hinged to the side wall of the guide tube. One end of the limiting rod extends to the detection box and is fixedly connected to an iron block. The iron block and the electromagnet are located on the same plane. The other end of the limiting rod is fixedly connected to a plug-in block. The side wall of the positioning plate has a first plug-in interface and a second plug-in interface. The plug-in block is inserted into the first plug-in interface or the second plug-in interface to fix the positioning plate.

[0015] By adopting the above technical solution, when the voltage sensor detects that the battery voltage is less than the preset value, it controls the battery to supply power to the electromagnet. The electromagnet attracts the iron block and moves it downward. The iron block drives the limit rod to rotate downward around the hinge point between it and the guide tube, so that the plug block is disengaged from the first plug interface. At this time, the stepper motor drives the limit disk to rotate, which drives the baffle to move to close the through hole.

[0016] Optionally, a return spring is fixedly connected to the side wall of the positioning disk, with one end of the return spring fixedly connected to the positioning disk and the other end fixedly connected to the guide pipe.

[0017] By adopting the above technical solution, when the user uses the device, after the plug-in block is inserted into the first plug-in interface, the positioning plate pulls the reset spring to relax. When the plug-in block is disengaged from the first plug-in interface, the tension of the reset spring drives the positioning plate to rotate until the plug-in block is automatically inserted into the second plug-in interface, so as to fix the positioning plate and the baffle.

[0018] Optionally, a cleaning mechanism is provided inside the guide tube; the cleaning mechanism includes a positioning ring, and multiple scraping rings are fixedly connected to the inner wall of the positioning ring. The inner diameter of the scraping rings is the same as the outer diameter of the electromagnetic induction rod, and the number of scraping rings corresponds one-to-one with the electromagnetic induction rod. A power component is provided inside the guide tube to drive the positioning rings to slide along the axial direction of the electromagnetic induction rod.

[0019] By adopting the above technical solution, when the user uses the device, the drive component drives the positioning ring to slide along the axial direction of the electromagnetic induction rod, and the scraping ring can scrape off the dust and silt on the electromagnetic induction rod without affecting the accuracy of the measurement.

[0020] Optionally, the power assembly includes a guide column fixedly connected inside the guide tube, a bidirectional reciprocating screw rotatably connected to the inner wall of the guide tube on the symmetrical side of the guide column, the axial directions of the bidirectional reciprocating screw and the guide column being parallel to the axial direction of the electromagnetic induction rod, a power motor fixedly connected to one end of the guide tube, the output shaft of the power motor being fixedly connected to the bidirectional reciprocating screw, one side of the positioning ring being slidably connected to the guide column, and the other side being threadedly connected to the bidirectional reciprocating screw.

[0021] By adopting the above technical solution, when the user uses the device, the power motor drives the bidirectional reciprocating screw to rotate, which in turn drives the positioning ring to slide along the axial direction of the bidirectional reciprocating screw. This, in turn, causes the scraper ring to slide on the outer wall of the electromagnetic induction rod. The scraper ring can scrape off the sludge and impurities accumulated on the electromagnetic induction rod, reducing the accumulation of dust and impurities on the electromagnetic induction rod and thus reducing the impact on the accuracy of measurement.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. A positioning plate is set inside the guide pipe. The center of the positioning plate has a through hole concentric with the guide pipe. Multiple baffles are set on one side of the positioning plate. Each baffle corresponds to one side of a regular polygon. The guide pipe is equipped with a drive component that drives the baffles to slide towards the center of the through hole to close the through hole and block the water flow, or to slide away from the center to open the through hole and allow water to flow. A voltage sensor is connected to the housing. The voltage sensor is used to detect the voltage value output by the battery. When the detected battery voltage value is less than the preset value, the drive component is controlled to drive the baffle to move to close the through hole. This has the function of preventing water from flowing continuously when the battery power is too low or depleted, and reducing measurement errors. 2. By setting up a cleaning mechanism, the amount of sludge and impurities accumulated on the electromagnetic induction rod can be reduced by scraping it off, thus reducing the accumulation of dust and impurities on the electromagnetic induction rod and affecting the accuracy of measurement. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional view of an embodiment of this application; Figure 3 This is a sectional view made to highlight the cleaning mechanism and the automatic valve mechanism; Figure 4 This is a schematic diagram of the cleaning mechanism and the electromagnetic induction rod; Figure 5 This is an exploded view of an embodiment of this application; Figure 6 This is an exploded view created to highlight the automatic valve mechanism; Figure 7 This is an exploded view created to highlight the guide pillars; Figure 8 This is a structural diagram designed to highlight the detection box and its internal structure; Figure 9 yes Figure 8 Enlarged view of part A.

[0024] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Display screen; 12. Receiving cavity; 13. Battery; 2. Guide tube; 21. Electromagnetic induction rod; 22. Cleaning mechanism; 221. Positioning ring; 222. Scraper ring; 223. Guide column; 224. Bidirectional reciprocating screw; 225. Power motor; 3. Automatic valve mechanism; 31. Positioning plate; 311. Through hole; 312. Guide groove; 313. First insertion interface; 314. Second insertion interface; 32. Baffle; 321. Sliding column; 322. Guide block; 33. Limiting plate; 331. Guide hole; 332. Slide groove; 34. Stepper motor; 341. Gear; 342. Rack; 35. Detection box; 351. Battery; 352. Electromagnet; 36. Limiting rod; 361. Iron block; 362. Insertion block; 37. Return spring. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0026] This application discloses a battery-powered electromagnetic water meter, referring to... Figure 1 and Figure 2 The device includes a housing 1 and a guide tube 2. The guide tube 2 is fixedly connected to the housing 1. Multiple electromagnetic induction rods 21 are installed inside the guide tube 2. The electromagnetic induction rods 21 are evenly distributed circumferentially along the inner wall of the guide tube 2. The axial direction of the electromagnetic induction rods 21 is parallel to the axial direction of the guide tube. An induction coil is installed inside the electromagnetic induction rod 21. When water flows through the electromagnetic coil, a magnetic field is generated. This magnetic field passes through the detection coil, thereby generating an electromotive force in the detection coil. The magnitude of this electromotive force is proportional to the water flow rate. Therefore, the water flow rate can be determined by measuring the magnitude of the electromotive force.

[0027] The housing 1 is provided with a display screen 11, which is used to display the amount of water flow. The housing 1 is symmetrically provided with a receiving cavity 12, and a storage battery 13 is placed in the receiving cavity 12. The storage battery 13 is used to power the electromagnetic induction rod 21 so that the water flow can be detected.

[0028] Reference Figure 3 and Figure 4A cleaning mechanism 22 is installed inside the guide pipe 2. The cleaning mechanism 22 is used to clean the electromagnetic induction rod 21 and remove the sediment deposited on the electromagnetic induction rod 21. The cleaning mechanism 22 includes a positioning ring 221. Multiple scraping rings 222 are fixedly connected to the inner wall of the positioning ring 221. The inner diameter of the scraping rings 222 is the same as the outer diameter of the electromagnetic induction rod 21, and the number of scraping rings 222 corresponds one-to-one with the electromagnetic induction rod 21. A guide post 223 is fixedly connected to the inner wall of the guide pipe 2. A bidirectional reciprocating screw 224 is rotatably connected to the inner wall of the guide pipe 2 on the side symmetrical to the guide post 223. The axes of the bidirectional reciprocating screw 224 and the guide post 223 are parallel to the axis of the electromagnetic induction rod 21. A power motor 225 is fixedly connected to one end of the guide pipe 2. The output shaft of the power motor 225 is fixedly connected to the bidirectional reciprocating screw 224. One side of the positioning ring 221 is slidably connected to the guide post 223, and the other side is threadedly connected to the bidirectional reciprocating screw 224. The power motor 225 drives the bidirectional reciprocating screw 224 to rotate, which in turn drives the positioning ring 221 to slide along the axial direction of the bidirectional reciprocating screw 224, thereby causing the scraper ring 222 to slide on the outer wall of the electromagnetic induction rod 21. The scraper ring 222 can scrape off the sludge and impurities accumulated on the electromagnetic induction rod 21, reducing the accumulation of dust and impurities on the electromagnetic induction rod 21 and affecting the accuracy of measurement.

[0029] When the battery 13 has low power or is depleted, water will still flow through the guide pipe 2. At this time, the magnetic force of the electromagnetic induction rod 21 weakens or disappears, resulting in inaccurate water flow measurement. In order to reduce water loss when the battery 13 has low power or is depleted, an automatic valve mechanism 3 is installed on the guide pipe 2 to close the water outlet of the guide pipe 2 in time.

[0030] Reference Figure 5 and Figure 6 The automatic valve mechanism 3 includes a positioning plate 31 disposed inside the guide pipe 2. The positioning plate 31 is rotatably connected to the guide pipe 2. A through hole 311 concentric with the guide pipe 2 is opened in the middle of the positioning plate 31. The through hole 311 is arranged in the shape of a regular polygon, shown as a regular hexagon in the figure, but not limited to a regular hexagon. Multiple baffles 32 are arranged on the side of the positioning plate 31 away from the guide pipe 2. Each baffle 32 corresponds to one side of the regular polygon. The baffles 32 are arranged in the shape of an isosceles triangle. All baffles 32 can slide towards the center to close the through hole 311 and block the water flow, or slide away from the center to open the through hole 311 and allow water to flow through.

[0031] Reference Figure 6 and Figure 7The positioning disk 31 has multiple guide grooves 312, each guide groove 312 corresponding to a baffle 32. The guide grooves 312 are arranged radially outward from the center of the positioning disk 31. Each baffle 32 is fixedly connected to a sliding column 321, which is slidably connected in the guide groove 312. When the positioning disk 31 rotates, the baffle 32 can be driven to slide towards or away from the center of the circle through the sliding column 321.

[0032] A limiting plate 33 is fixedly connected inside the guide pipe 2 on the side of the baffle 32 away from the positioning plate 31. A guide hole 331 corresponding to the through hole 311 is opened at the center of the limiting plate 33. The structure of the guide hole 331 is the same as that of the through hole 311. A sliding groove 332 is opened on the limiting plate 33, and the sliding groove 332 is inclined along the circumference of the limiting plate 33. A guide block 322 is fixedly connected on the side of the baffle 32 away from the sliding column 321. The guide block 322 is inserted into the sliding groove 332 and can slide within the sliding groove 332. When the positioning plate 31... During rotation, the baffle 32 slides towards the center, while the guide block 322 slides in the groove 332, causing the baffle 32 to rotate around the sliding column 321 towards the center, completely closing the through hole 311 and the guide hole 331. When the positioning disk 31 rotates in the opposite direction, the baffle 32 slides away from the center, and the guide block 322 slides in the groove 332, causing the baffle 32 to flip outward around the sliding column 321, completely opening the through hole 311 and the guide hole 331 without affecting the size of the water flow.

[0033] A stepper motor 34 is fixedly connected to the side wall of the guide pipe 2. A gear 341 is fixedly connected to the output shaft of the stepper motor 34. A rack 342 is fixedly connected to the side of the positioning disk 31. The gear 341 and the rack 342 mesh. When the stepper motor 34 rotates forward, it can drive the positioning disk 31 to rotate in one direction through the gear 341 and the rack 342, so that the baffle 32 closes the through hole 311 and the guide hole 331. When the stepper motor 34 rotates in reverse, it can drive the positioning disk 31 to rotate in the opposite direction, so that the baffle 32 opens the through hole 311 and the guide hole 331.

[0034] Reference Figure 8 and Figure 9 A detection box 35 is fixedly connected to the side wall of the housing 1. The detection box 35 is hollow and contains a voltage sensor. The voltage sensor is used to detect the voltage value output by the battery 13. When the voltage value output by the battery 13 is less than the preset value, it controls the stepper motor 34 to rotate. That is, the pressure sensor detects that the battery 13 has too low power and controls the stepper motor 34 to drive the positioning disk 31 to rotate so that the baffle 32 slides to the middle position of the through hole 311 to close the through hole 311, thereby achieving power and water cut-off.

[0035] The detection box 35 contains a battery 351 and an electromagnet 352. The battery 351 powers the electromagnet 352 and is controlled by a voltage sensor. When the voltage sensor detects that the voltage of the battery 13 is less than a preset value, it controls the battery 351 to power the electromagnet 352. A limiting rod 36 is hinged to the side wall of the guide tube 2. One end of the limiting rod 36 extends into the detection box 35 and is fixedly connected to an iron block 361. The iron block 361 and the electromagnet 352 are on the same plane. The other end of the limiting rod 36 is fixedly connected to a plug block 362. The side wall of the positioning plate 31 is opened... There is a first insertion interface 313 and a second insertion interface 314. The insertion block 362 is inserted into the first insertion interface 313 or the second insertion interface 314 to fix the positioning disk 31. When the voltage sensor detects that the voltage of the storage battery 13 is less than the preset value, it controls the power supply battery 351 to supply power to the electromagnet 352. The electromagnet 352 attracts the iron block 361 and moves it downward. The iron block 361 drives the limiting rod 36 to flip downward around its hinge point with the guide tube 2, so that the insertion block 362 is disengaged from the first insertion interface 313. At this time, the stepper motor 34 works to drive the limiting disk 33 to rotate, which drives the baffle 32 to move to close the through hole 311.

[0036] A return spring 37 is fixedly connected to the side wall of the positioning disk 31. One end of the return spring 37 is fixedly connected to the positioning disk 31, and the other end is fixedly connected to the guide tube 2. When the plug block 362 is inserted into the first plug interface 313, the positioning disk 31 pulls the return spring 37 to relax. When the plug block 362 is disengaged from the first plug interface 313, the tension of the return spring 37 drives the positioning disk 31 to rotate until the plug block 362 is automatically inserted into the second plug interface 314, so as to fix the positioning disk 31 and the baffle 32.

[0037] The implementation principle of a battery-powered electromagnetic water meter according to an embodiment of this application is as follows: The voltage sensor detects the voltage value output by the storage battery 13 in real time. When the detected voltage value is less than the preset value, the battery 351 is first controlled to supply power to the electromagnet 352. The electromagnet 352 attracts the iron block 361 and moves it downward. The iron block 361 drives the limiting rod 36 to flip downward around its hinge point with the guide pipe 2, so that the plug block 362 is disengaged from the first plug interface 313. At the same time, the stepper motor 34 is controlled to drive the limiting disk 33 to rotate, which drives the baffle 32 to move to close the through hole 311, so that the water source is cut off when the storage battery 13 has low power or no power.

[0038] In addition, the dust or impurities accumulated on the electromagnetic induction rod 21 are cleaned regularly. The power motor 225 drives the bidirectional reciprocating screw 224 to rotate, which in turn drives the positioning ring 221 to slide along the axial direction of the bidirectional reciprocating screw 224. This causes the scraper ring 222 to slide on the outer wall of the electromagnetic induction rod 21. The scraper ring 222 can scrape off the sludge and impurities accumulated on the electromagnetic induction rod 21, reducing the accumulation of dust and impurities on the electromagnetic induction rod 21 and thus reducing the impact on the accuracy of measurement.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A battery-powered electromagnetic water meter, comprising a housing (1) and a flow guide pipe (2), the flow guide pipe (2) being fixedly connected to the housing (1), and a plurality of electromagnetic induction rods (21) being disposed inside the flow guide pipe (2). A receiving cavity (12) is provided on the housing (1), and a storage battery (13) for supplying power to the electromagnetic induction rods (21) is placed inside the receiving cavity (12), characterized in that: An automatic valve mechanism (3) is provided on the guide pipe (2); The automatic valve mechanism (3) includes a positioning disk (31) rotatably connected to the guide pipe (2). The center of the positioning disk (31) is provided with a through hole (311) concentric with the guide pipe (2). The through hole (311) is arranged in the shape of a regular polygon. Multiple baffles (32) are provided on one side of the positioning disk (31). Each baffle (32) corresponds to one side of the regular polygon. The guide pipe (2) is provided with a drive component that drives the baffle (32) to slide towards the center of the through hole (311) to close the through hole (311) and block the water flow, or slides away from the center to open the through hole (311) to supply water. A voltage sensor is connected to the housing (1). The voltage sensor is used to detect the voltage value output by the battery (13). When the voltage value of the battery (13) is detected to be less than the preset value, the drive component is controlled to drive the baffle (32) to move to close the through hole (311). A limiting plate (33) is fixedly connected inside the guide pipe (2) on the side of the baffle (32) away from the positioning plate (31). The center of the limiting plate (33) is provided with a guide hole (331) corresponding to the through hole (311). A sliding groove (332) is provided on the limiting plate (33). The sliding groove (332) is inclined along the circumference of the limiting plate (33). A guide block (322) is fixedly connected on the side of the baffle (32) away from the sliding column (321). The guide block (322) is inserted into the sliding groove (332) and can slide in the sliding groove (332). The detection box (35) is equipped with a battery (351) and an electromagnet (352). The battery (351) is used to supply power to the electromagnet (352). The battery (351) is controlled by a voltage sensor. When the voltage sensor detects that the voltage of the storage battery (13) is less than a preset value, it controls the battery (351) to supply power to the electromagnet (352). A limiting rod (36) is hinged to the side wall of the guide tube (2). One end of the limiting rod (36) extends to the detection box (35) and is fixedly connected to an iron block (361). The iron block (361) and the electromagnet (352) are located on the same plane. The other end of the limiting rod (36) is fixedly connected to a plug block (362). The side wall of the positioning disk (31) is provided with a first plug interface (313) and a second plug interface (314). The plug block (362) is inserted into the first plug interface (313) or the second plug interface (314) to fix the positioning disk (31).

2. A battery powered electromagnetic water meter according to claim 1, characterized in that: The positioning disk (31) has multiple guide grooves (312) corresponding to the baffles (32), and each baffle (32) is fixedly connected to a sliding column (321), which is slidably connected in the guide groove (312).

3. A battery powered electromagnetic water meter according to claim 1, wherein: The drive assembly includes a stepper motor (34) mounted on the guide tube (2), a gear (341) fixedly connected to the output shaft of the stepper motor (34), and a rack (342) fixedly connected to the side of the positioning disk (31), with the gear (341) and rack (342) meshing.

4. The battery-powered electromagnetic water meter according to claim 1, characterized in that: A reset spring (37) is fixedly connected to the side wall of the positioning disk (31). One end of the reset spring (37) is fixedly connected to the positioning disk (31), and the other end is fixedly connected to the guide pipe (2).

5. The battery-powered electromagnetic water meter according to claim 1, characterized in that: A cleaning mechanism (22) is provided inside the guide tube (2); The cleaning mechanism (22) includes a positioning ring (221). Multiple scraping rings (222) are fixedly connected to the inner wall of the positioning ring (221). The inner diameter of the scraping ring (222) is the same as the outer diameter of the electromagnetic induction rod (21). The number of scraping rings (222) corresponds one-to-one with the electromagnetic induction rod (21). A power component is provided in the guide tube (2) to drive the positioning ring (221) to slide along the axial direction of the electromagnetic induction rod (21).

6. The battery-powered electromagnetic water meter according to claim 5, characterized in that: The power assembly includes a guide post (223) fixedly connected inside the guide tube (2). A bidirectional reciprocating screw (224) is rotatably connected to the inner wall of the guide tube (2) on the symmetrical side of the guide post (223). The axial directions of the bidirectional reciprocating screw (224) and the guide post (223) are parallel to the axial direction of the electromagnetic induction rod (21). A power motor (225) is fixedly connected to one end of the guide tube (2). The output shaft of the power motor (225) is fixedly connected to the bidirectional reciprocating screw (224). One side of the positioning ring (221) is slidably connected to the guide post (223), and the other side is threadedly connected to the bidirectional reciprocating screw (224).

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