Pipeline water flow state monitoring device and method

Abstract

The invention relates to the technical field of intelligent water affair terminal equipment, and discloses a pipeline water flow state monitoring device and method.The pipeline water flow state monitoring device comprises a pipeline connector with the two ends connected into a water meter in series and further comprises a flow guide pipe arranged on the pipeline connector, and a fixing shaft is installed in the flow guide pipe; the fixed magnet is fixedly connected to the drainage side end part of the fixed shaft; the movable magnet slidably sleeves the end part of the water inlet side of the fixed shaft, and the magnetic poles of the movable magnet and the sides, close to each other, of the fixed magnet are the same; the sensor is arranged on the outer side of the flow guide pipe and matched with the sliding track of the movable magnet; the signal processing module is arranged outside the pipeline connector and is electrically connected with the sensor; according to the invention, the working state of the water meter can be actually monitored, the fault source is accurately distinguished, the loss of enterprises is greatly reduced, the operation and maintenance efficiency is improved, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of smart water terminal equipment technology, specifically to a pipeline water flow status monitoring device and method. Background Technology

[0002] Smart water management is a modern model that uses next-generation information technologies such as the Internet of Things, big data, and cloud computing to digitally, network, and intelligently manage the entire water management process, including water supply, drainage, and sewage treatment. Its core objective is to shift from "human experience" management to "data intelligence."

[0003] With the large-scale advancement of smart water management, rotary vane water meters are still widely used in urban water supply network terminals due to their advantages such as simple structure and controllable cost. However, in the actual operation of smart water management, there are still significant shortcomings in the fault monitoring and operation and maintenance management of rotary vane water meters.

[0004] Current rotary water meters often experience impeller failures due to long-term operation under complex conditions, yet users can still use water normally. Existing technologies lack online monitoring methods, causing serious losses to enterprises. When the impeller or smart module fails, it is impossible to distinguish the root cause of the failure without disassembling the machine, resulting in high maintenance costs and low efficiency per operation. Summary of the Invention

[0005] This invention provides a pipeline water flow status monitoring device. A movable magnet, propelled by water flow, causes a sensor to generate a pulse signal. This pulse signal is transmitted to a smart water meter module via a signal processing module. By comparing the consistency between the water meter's sampled signal and the pulse signal, a fault in the impeller or smart module can be determined. This not only allows for timely fault detection, reducing enterprise losses, but also distinguishes the root cause of the fault without disassembling the device. It reduces the cost of each maintenance operation and improves maintenance efficiency, solving the problems mentioned in the background art regarding the inability to monitor faults online and distinguish their root causes.

[0006] This invention provides the following technical solution:

[0007] A pipeline water flow status monitoring device includes a pipeline connector connected in series at both ends to a water meter pipeline, and further includes: a flow guide pipe disposed at the pipeline connector, with a fixed shaft installed inside the flow guide pipe; a fixed magnet fixedly connected to the drainage side end of the fixed shaft; a movable magnet slidably sleeved on the water inlet side end of the fixed shaft, with the same magnetic poles on the side closest to the fixed magnet; a sensor disposed outside the flow guide pipe, matching the sliding trajectory of the movable magnet; and a signal processing module disposed outside the pipeline connector, electrically connected to the sensor. When the water flow pushes the movable magnet to slide against magnetic repulsion towards the sensor, the sensor senses the change in magnetic field and outputs a pulse signal. The signal processing module transmits the pulse signal to the water meter's smart module. By comparing the consistency between the water meter's sampling signal and the pulse signal, a fault in the impeller or smart module is determined.

[0008] As a preferred embodiment of the present invention, the pipe connector is provided with standard threaded interfaces at both ends, and the standard threaded interfaces are G1 / 2 threads.

[0009] As a preferred embodiment of the present invention, the fixed shaft and the guide tube are connected by an installation component, which is a snap-fit ​​structure.

[0010] As a preferred embodiment of the present invention, both the fixed magnet and the movable magnet are neodymium iron boron permanent magnets. The fixed magnet is bonded to the end of the fixed shaft with epoxy resin adhesive, and the movable magnet has a through hole in the center that is clearance-fitted with the fixed shaft.

[0011] As a preferred embodiment of the present invention, a return spring is further included, wherein the return spring is sleeved outside the fixed shaft, and the two ends of the return spring are respectively connected to a fixed magnet and a movable magnet.

[0012] As a preferred embodiment of the present invention, it further includes a flow guide cover, which is fixedly connected to the water inlet side of the fixed shaft. The outer side of the flow guide cover is streamlined, and multiple flow guide grooves are uniformly formed on the outer side of the flow guide cover.

[0013] As a preferred embodiment of the present invention, a connector is also included, which is disposed between the guide tube and the sensor for fixing the guide tube and the sensor.

[0014] As a preferred embodiment of the present invention, it further includes a fixing member that penetrates both the inner and outer sides of the pipe connector. One end of the fixing member is connected to a sensor, and the other end of the fixing member is connected to a signal processing module. The pipe connector has a drilled hole that matches the fixing member.

[0015] As a preferred embodiment of the present invention, it further includes a cut and a cover plate. The cut is made on the side of the pipe connector near the guide pipe. The cover plate matches the cut and is used for the installation of the guide pipe and the sensor inside the pipe connector. After installation, the cover plate and the cut are fixed by welding.

[0016] A method for monitoring the state of water flow in a pipeline includes the following steps:

[0017] Step 1: With the tap closed, install the assembled device onto the pipe at the inlet or outlet of the water meter.

[0018] Step 2: In the absence of water, there is no magnetic field to trigger the device, and the device outputs a low-level signal;

[0019] Step 3: Then turn on the tap. The magnetic field changes, and the device outputs a high-level pulse signal.

[0020] Step 4: If the device outputs a pulse signal but the smart water meter module does not have a pointer sampling signal, it indicates that the impeller is stuck or there is a mechanical transmission failure.

[0021] Step 5: If the device has no pulse signal but the smart water meter module has a pointer sampling signal, then the smart module is determined to be faulty.

[0022] Step Six: When the signal from the device matches that from the smart module of the water meter, the water meter is considered to be working normally.

[0023] Step 7: If there is a difference between the signal from the device and the smart module of the water meter, a suspected fault is identified.

[0024] Compared with the prior art, the present invention provides a device and method for monitoring the state of water flow in a pipeline, which has the following beneficial effects:

[0025] 1. In this pipeline water flow status monitoring device, the water flow pushes the movable magnet to move along the fixed axis towards the side of the fixed magnet, causing the sensor to generate a pulse signal, which is then transmitted to the water meter smart module. By comparing the consistency between the water meter sampling signal and the pulse signal, the fault of the impeller or smart module can be determined. This not only allows for online monitoring of the working status, reducing losses for enterprises, but also helps to distinguish the root cause of the impeller or smart module fault, reducing the cost of each maintenance operation and improving maintenance efficiency.

[0026] 2. The pipeline water flow status monitoring device, through the separate design of the device and the water meter, can be adapted to the renovation of existing water meters, with low renovation cost, improved device compatibility, and is not easily affected by pipeline vibration and external magnetic field interference, reducing the false alarm rate and improving the device's anti-interference capability, thus meeting the needs of water companies for precise management and control.

[0027] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention can actually monitor the working status of water meters and accurately distinguish the root cause of faults, greatly reducing the losses of enterprises, as well as improving operation and maintenance efficiency and reducing operation and maintenance costs. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0029] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0030] Figure 2 This is a partial perspective view of the present invention;

[0031] Figure 3 This is a three-dimensional schematic diagram of the connection between the internal structure of the pipe connector and the signal processing module in this invention;

[0032] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the guide tube in this invention;

[0033] Figure 5 This is a three-dimensional schematic diagram of the air deflector of the present invention;

[0034] Figure 6 This is a three-dimensional schematic diagram of the pipe connector in this invention.

[0035] In the diagram: 1. Pipe connector; 2. Drill hole; 3. Cut; 4. Cover plate; 5. Fixing component; 6. Signal processing module; 7. Sensor; 8. Connector; 9. Guide tube; 10. Mounting component; 11. Fixed shaft; 12. Fixed magnet; 13. Movable magnet; 14. Return spring; 15. Guide shield; 16. Guide groove. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] Reference Figures 1-6A pipeline water flow status monitoring device includes a pipeline connector 1, with both ends connected in series to a water meter pipeline. Both ends of the pipeline connector 1 are equipped with standard threaded interfaces, which are G1 / 2 threads, made of ABS water-resistant material, and sealed to the water supply pipeline. The threaded interfaces are compatible with mainstream water meter pipeline specifications. During installation, Teflon tape or sealant can be used to achieve a water pressure seal. By connecting in series, the monitoring point can be placed before or after the water meter, ensuring that the water flow passes through the detection area before entering or after exiting the water meter's metering chamber, thus achieving synchronous detection of the same water flow status. The monitoring function can be added to the existing pipeline network without modifying the water meter itself, adapting to both existing water meter retrofitting and new water meter pre-installation scenarios, significantly reducing the cost of smart water management upgrades.

[0039] According to Figures 3-4 A guide pipe 9 is installed at the pipe connector 1. A fixed shaft 11 is installed inside the guide pipe 9. An installation component 10 is connected between the fixed shaft 11 and the guide pipe 9. The installation component 10 has a snap-fit ​​structure.

[0040] The guide pipe 9 is made of ABS water-grade material, with an inner diameter of 5mm, an outer diameter of 8mm, and a length of 50mm. Its inner diameter is larger than the outer diameter of the movable magnet 13, forming an annular water flow channel. After the water enters the pipe connector 1, it is forcibly guided to the area of ​​the guide pipe 9. The kinetic energy of the water flow directly acts on the end face of the movable magnet 13, avoiding insufficient thrust due to water flow dispersion. While ensuring smooth water flow, it creates an independent and stable working space for the movable magnet 13, reducing the interference of water flow turbulence on the movement of the movable magnet 13 and improving monitoring stability. The fixed shaft 11 is... Made of 304 stainless steel, with a diameter of 2mm and a length of 45mm, the movable magnet 13 slides along the surface of the fixed shaft 11 when the water flow pushes it, maintaining its own stable position. This guides the movable magnet 13 to move according to the predetermined stacking motion, ensuring that the movable magnet 13 can accurately reach the sensing area of ​​the sensor 7 each time the water flow is triggered, improving the consistency of signal triggering and the life of the device. The mounting part 10 is a support for the elastic claw. It uses the elastic deformation ability to limit the movement through the groove on the inner wall of the guide tube 9 to complete the locking. When disassembling, it can be separated using a special tool.

[0041] According to Figure 4 A fixed magnet 12 is fixedly connected to the drainage side end of the fixed shaft 11; a movable magnet 13 is slidably sleeved on the water inlet side end of the fixed shaft 11, and has the same magnetic poles on the side closest to the fixed magnet 12. Both the fixed magnet 12 and the movable magnet 13 are neodymium iron boron permanent magnets. The fixed magnet 12 is bonded to the end of the fixed shaft 11 with epoxy resin adhesive, and the movable magnet 13 has a through hole in the center that fits with the fixed shaft 11 with a clearance.

[0042] Both the fixed magnet 12 and the movable magnet 13 have a diameter of 4mm and a length of 8mm, and their surfaces are nickel-plated for rust prevention. The through-hole diameter of the movable magnet 13 is 2.1mm, which is clearance-fitted with the fixed shaft 11. Based on the principle of like poles repulsion of permanent magnets, the fixed magnet 12 generates a continuous magnetic repulsion force on the movable magnet 13. It does not rely on external energy and can act stably for a long time, forming a reset driving force. When the water flow stops, the magnetic repulsion force overcomes the friction of the movable magnet 13 and the thrust of the residual water flow, pushing the movable magnet 13 back to its initial position on the water inlet side, and the magnetic field moves away from the sensor 7. When the water flow comes, the water flow pressure generates thrust to overcome the magnetic repulsion force, causing the movable magnet 13 to slide towards the drain side and gradually approach the sensor 7. The magnetic field strength increases accordingly. The movable magnet 13 is both a force-receiving element and a signal source, realizing the direct conversion of water flow-magnetic field-electrical signal. There are no mechanical contacts, avoiding the wear and oxidation problems of traditional microswitches, and the response is sensitive.

[0043] According to Figures 2-3 The sensor 7 is located outside the guide tube 9 and matches the sliding trajectory of the movable magnet 13. It also includes a connector 8, which is located between the guide tube 9 and the sensor 7 and is used to fix the guide tube 9 and the sensor 7.

[0044] Sensor 7 is a linear Hall sensor, or other non-magnetic sampling components.

[0045] In this case, a linear Hall effect sensor is used. Its operating voltage is 3.3V-5V, its response frequency is greater than or equal to 1kHz, and its detection distance is less than or equal to 5mm. It is housed in a waterproof PC casing, protecting the sensor 7 for use in harsh underwater environments. When the movable magnet 13 moves into the sensing range of the sensor 7, the output voltage of the sensor 7 jumps from the reference value to above the threshold. The signal processing module 6 recognizes this jump as a valid pulse. The voltage drops back after the movable magnet 13 leaves the sensor. This non-contact detection eliminates mechanical wear and has a long lifespan. Its response frequency reaches the kHz level, enabling it to capture instantaneous water flow fluctuations. It also has low power consumption, making it suitable for battery-powered remote monitoring terminals. Component 8 can be a clamp-type, clip-type, or adhesive bracket. One end is wrapped around or bonded to the outer wall of the guide pipe 9, and the other end is wrapped around or bonded to the outer wall of the sensor 7. It is made of PC or metal. The modular fixing method facilitates the individual replacement and debugging of the sensor 7. It maintains a consistent sensing distance, ensures consistent signal output of batch products, and reduces calibration workload. When the water flow pushes the movable magnet 13 to slide towards the sensor 7 against the magnetic repulsion force, the sensor 7 senses the change in magnetic field and outputs a pulse signal. The signal processing module 6 transmits the pulse signal to the water meter smart module. By comparing the consistency between the water meter sampling signal and the pulse signal, the impeller or smart module fault is determined.

[0046] According to Figures 1-3 and Figure 6The signal processing module 6 is located outside the pipe connector 1 and is electrically connected to the sensor 7. It also includes a fixing member 5, which passes through the inner and outer sides of the pipe connector 1. One end of the fixing member 5 is connected to the sensor 7, and the other end of the fixing member 5 is connected to the signal processing module 6. A drill hole 2 matching the fixing member 5 is opened on the pipe connector 1.

[0047] The signal processing module 6 integrates filtering circuits, amplification circuits, and data structures, encapsulated in a waterproof housing. It performs noise reduction and amplification processing on the output signal of sensor 7 and is electrically connected to the smart water meter module via an RS485 interface. The integrated design reduces the complexity of on-site wiring. Built-in algorithms enable edge computing, reducing the burden on the main station. Potting protection ensures long-term reliable operation in humid environments. The fixing component 5 is a metal column with hollow internal wiring and a sealed outer wall. One end connects to sensor 7, and the other end connects to the waterproof housing of signal processing module 6. It passes through a drilled hole 2 on the wall of pipe connector 1. The fixing component 5 and the drilled hole 2 are sealed by welding, simplifying internal wiring, improving assembly efficiency, eliminating the risk of wire breakage, and improving product reliability. The modular structure facilitates overall disassembly and maintenance, reducing the difficulty of operation and maintenance.

[0048] Reference Figure 4 It also includes a return spring 14, which is sleeved on the outside of the fixed shaft 11, and the two ends of the return spring 14 are respectively connected to the fixed magnet 12 and the movable magnet 13.

[0049] The reset spring 14 is made of stainless steel with a wire diameter of 0.3mm and a free length of 10mm. It provides auxiliary reset force to enhance the reliability of the movable magnet 13 returning to its initial position in the absence of water flow. It is particularly suitable for viscous water or low water pressure conditions. When there is no water flow, the reset spring 14 is in a free length or slightly compressed state. The elastic force and magnetic repulsion force together push the movable magnet 13 away from the sensor 7. When there is water flow, the water flow force overcomes the resistance of the reset spring 14 and the magnetic repulsion force, compresses the reset spring 14 and pushes the movable magnet 13 forward. The dual reset mechanism ensures reliable reset in low water pressure and high viscosity media, and avoids false alarms caused by the movable magnet 13 getting stuck in the sensing area due to insufficient magnetic force. The elastic force of the reset spring 14 can compensate for the attenuation of magnetic force due to temperature or aging.

[0050] Reference Figures 4-5 It also includes a flow guide shroud 15, which is fixedly connected to the water inlet side of the fixed shaft 11. The outer side of the flow guide shroud 15 is streamlined, and multiple flow guide grooves 16 are evenly provided on the outer side of the flow guide shroud 15.

[0051] The flow guide shroud 15 optimizes the flow field distribution at the inlet, eliminating turbulence and vortices generated when water impacts the movable magnet 13, preventing the movable magnet 13 from vibrating or deflecting due to lateral forces, and ensuring smooth axial sliding. The streamlined rotating body (such as a hemispherical head or parabolic shape) is fitted with the inner diameter of the flow guide pipe 9 with clearance and connected to the inlet end of the fixed shaft 11. The outer surface has axial or spiral flow guide grooves 16 to guide the water flow to disperse evenly into the annular flow channel. When the water enters the flow guide pipe 9, it first impacts the flow guide shroud 15. The streamlined shape causes the water flow to split tangentially. After being rectified by the flow guide grooves 16, it forms an axisymmetric flow field, which acts evenly on the end face of the movable magnet 13, reducing the vibration and false triggering of the movable magnet 13 caused by water flow turbulence, improving the signal-to-noise ratio and repeatability of the pulse signal, reducing water flow resistance, reducing device pressure loss, and having less impact on the pipeline network.

[0052] Reference Figures 1-2 It also includes a cut 3 and a cover plate 4. The cut 3 is opened on the side of the pipe connector 1 near the guide pipe 9. The cover plate 4 matches the cut 3 and is used for the installation of the guide pipe 9 and the sensor 7 in the pipe connector 1. After installation, the cover plate 4 and the cut 3 are fixed by welding.

[0053] The cut 3 provides an assembly channel, allowing internal components such as the guide tube 9, fixed shaft 11, fixed magnet 12, and movable magnet 13 to be installed after the pipe connector 1 is integrally formed. This solves the process problem of installing internal components first and then sealing. An arc-shaped through cut 3 is made axially on the side wall of the pipe connector 1, with a size larger than the maximum outline of the guide tube 9 and other components. The cover plate 4 is an arc panel that matches the shape of the cut 3, with welded bevels at the edges. The guide tube 9 and other components are pre-assembled into an integral module and pushed laterally into the inner cavity of the pipe connector 1 through the cut 3. After adjusting the position, the cover plate 4 is pressed into the cut 3, and argon arc welding or laser welding is performed along the joint to form a metallurgical bond between the cover plate 4 and the pipe connector 1. Modular assembly improves production efficiency and reduces assembly difficulty. The structural strength after welding is consistent with that of the main pipe, and the pressure resistance is not affected. The welded seal has a long service life and no risk of aging failure. The pressure bearing capacity exceeds that of threaded connections or adhesive bonding. The weld can be treated with anti-corrosion, with a service life synchronized with that of the pipe connector 1.

[0054] Example 2:

[0055] Similar to Example 1, a method for monitoring pipeline water flow status is proposed based on Example 1, including the following steps:

[0056] Step 1: With the tap closed, install the assembled device onto the pipe at the inlet or outlet of the water meter.

[0057] Installation is ensured to be completed under static conditions free from water flow interference, avoiding damage to components or injury to personnel caused by water flow impact during installation. The installation is highly safe, preventing water hammer damage to the internal precision magnet components. The installation location is flexible and can be selected according to site space and maintenance convenience. The pre-assembled modules are ready to use immediately after installation, without the need for on-site debugging of the internal structure.

[0058] Step 2: In the absence of water, there is no magnetic field to trigger the device, and the device outputs a low-level signal;

[0059] When the installation is complete but water is not connected, the movable magnet 13 is located in its initial position under the action of magnetic repulsion and the elastic force of the reset spring 14, away from the sensor 7. The Hall voltage is at the static reference value, and the signal processing module 6 determines this value as low level, clearly defining the waterless state and avoiding false triggering by stray magnetic fields in the environment; low power standby, suitable for battery-powered scenarios; stable signal baseline, unaffected by temperature drift.

[0060] Step 3: Then turn on the tap. The magnetic field changes, and the device outputs a high-level pulse signal.

[0061] When the tap is turned on, the water flow pushes the movable magnet 13 to slide into the sensing range of the sensor 7, the magnetic flux density increases sharply, the Hall voltage exceeds the threshold, and the sensor 7 converts the rate of change of the magnetic field into a voltage jump, realizing the energy form conversion. The pulse signal has strong anti-interference ability and is easy to transmit over long distances. The pulse frequency is positively correlated with the flow rate and can be extended for flow estimation. The digital signal is easy to count directly and make logical judgments.

[0062] Step 4: If the device outputs a pulse signal but the smart water meter module does not have a pointer sampling signal, it indicates that the impeller is stuck or there is a mechanical transmission failure.

[0063] If water flow is present, the water meter impeller should rotate, and the smart module should receive a pointer sampling signal. If the smart module does not receive a signal, the logic infers that the impeller is not rotating, the mechanical transmission chain is interrupted, and water flow is a necessary condition for impeller rotation. The presence of water flow but no metering signal indicates that the necessary condition is met but the result has not occurred, so the cause lies in the impeller itself. This allows for rapid identification of impeller faults and avoids continuous water loss. The judgment logic is clear and unambiguous, with a low false alarm rate. It provides maintenance personnel with a basis for direct meter disassembly and impeller repair decisions.

[0064] Step 5: If the device has no pulse signal but the smart water meter module has a pointer sampling signal, then the smart module is determined to be faulty.

[0065] In a waterless state, the water meter impeller should be stationary and the smart module should not have a sampling signal. If the smart module still reports metering data, it is inferred that its sampling circuit is falsely triggered or the software counting is incorrect. This accurately distinguishes between electronic and mechanical faults, avoiding blindly disassembling the meter. It can remotely diagnose software or circuit faults and guide the replacement of the smart module instead of the entire meter, reducing maintenance costs.

[0066] Step Six: When the signal from the device matches that from the smart module of the water meter, the water meter is considered to be working normally.

[0067] When there is water flow, both signals appear synchronously; when there is no water flow, both signals disappear synchronously. The state machine remains synchronized, indicating that the mechanical and electronic systems of the water meter respond in unison, with no signs of malfunction. This provides confirmation feedback of normal operating status and enhances the reliability of the system. It can also serve as a basis for health assessment. Good consistency over a long period of time indicates that the water meter's performance is stable.

[0068] Step 7: If there is a difference between the signal from the device and the smart module of the water meter, a suspected fault is identified.

[0069] If the dual signal states are mismatched (e.g., there is a pulse but the water meter signal is intermittent, or there is no pulse but the water meter has an occasional signal), but the duration does not reach the fault confirmation threshold (30 seconds), it is first marked as a suspected fault state. This avoids the instantaneous signal asynchrony caused by transient interference (such as bubbles, vibration) being mistakenly judged as a fault, reducing the false alarm rate and avoiding frequent alarms that interfere with maintenance personnel. Suspected states can trigger data logging to save on-site data for subsequent fault analysis. A graded alarm mechanism is provided to differentiate the handling of major faults and minor anomalies.

[0070] Components not described in detail in this article are existing technologies.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline water flow status monitoring device, comprising a pipeline connector (1), with both ends connected in series to a water meter pipeline, characterized in that, Also includes: A guide pipe (9) is provided at the pipe connector (1), and a fixed shaft (11) is installed inside the guide pipe (9). A fixed magnet (12) is fixedly connected to the drain side end of the fixed shaft (11); The movable magnet (13) is slidably sleeved on the water inlet end of the fixed shaft (11), and has the same magnetic pole as the fixed magnet (12) on the side closest to each other; The sensor (7) is located outside the guide tube (9) and matches the sliding trajectory of the movable magnet (13); The signal processing module (6) is located outside the pipe connector (1) and is electrically connected to the sensor (7). When the water flow pushes the movable magnet (13) to slide towards the sensor (7) against the magnetic repulsion, the sensor (7) senses the change in the magnetic field and outputs a pulse signal. The signal processing module (6) transmits the pulse signal to the water meter smart module. By comparing the consistency between the water meter sampling signal and the pulse signal, the impeller or smart module is determined to be faulty.

2. The pipeline water flow status monitoring device according to claim 1, characterized in that, The pipe connector (1) has standard threaded interfaces at both ends, and the standard threaded interfaces are G1 / 2 threads.

3. The pipeline water flow status monitoring device according to claim 1, characterized in that, An installation component (10) is connected between the fixed shaft (11) and the guide pipe (9), and the installation component (10) is a snap-fit ​​structure.

4. The pipeline water flow status monitoring device according to claim 1, characterized in that, Both the fixed magnet (12) and the movable magnet (13) are neodymium iron boron permanent magnets. The fixed magnet (12) is bonded to the end of the fixed shaft (11) with epoxy resin adhesive. The movable magnet (13) has a through hole in the center that is clearance-fitted with the fixed shaft (11).

5. A pipeline water flow status monitoring device according to claim 4, characterized in that, It also includes a reset spring (14), which is sleeved on the outside of the fixed shaft (11), and the two ends of the reset spring (14) are respectively connected to the fixed magnet (12) and the movable magnet (13).

6. The pipeline water flow status monitoring device according to claim 1, characterized in that, It also includes a flow guide (15), which is fixedly connected to the water inlet side of the fixed shaft (11). The outer side of the flow guide (15) is streamlined, and multiple flow guide grooves (16) are evenly provided on the outer side of the flow guide (15).

7. A pipeline water flow status monitoring device according to claim 1, characterized in that, It also includes a connector (8), which is disposed between the guide tube (9) and the sensor (7) for fixing the guide tube (9) and the sensor (7).

8. A pipeline water flow status monitoring device according to claim 1, characterized in that, It also includes a fastener (5), which penetrates the inner and outer sides of the pipe connector (1). One end of the fastener (5) is connected to the sensor (7), and the other end of the fastener (5) is connected to the signal processing module (6). The pipe connector (1) has a drill hole (2) that matches the fastener (5).

9. A pipeline water flow status monitoring device according to claim 1, characterized in that, It also includes a cut (3) and a cover plate (4). The cut (3) is opened on the side of the pipe connector (1) near the guide pipe (9). The cover plate (4) matches the cut (3) and is used for the installation of the guide pipe (9) and the sensor (7) in the pipe connector (1). After installation, the cover plate (4) and the cut (3) are fixed by welding.

10. A method for monitoring the state of water flow in a pipeline, employing a pipeline water flow monitoring device as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: With the tap closed, install the assembled device onto the pipe at the inlet or outlet of the water meter. Step 2: In the absence of water, there is no magnetic field to trigger the device, and the device outputs a low-level signal; Step 3: Then turn on the tap. The magnetic field changes, and the device outputs a high-level pulse signal. Step 4: If the device outputs a pulse signal but the smart water meter module does not have a pointer sampling signal, it indicates that the impeller is stuck or there is a mechanical transmission failure. Step 5: If the device has no pulse signal but the smart water meter module has a pointer sampling signal, then the smart module is determined to be faulty. Step Six: When the signal from the device matches that from the smart module of the water meter, the water meter is considered to be working normally. Step 7: If there is a difference between the signal from the device and the smart module of the water meter, a suspected fault is identified.

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