Pipeline hydraulic power self-powered flow monitoring device

Abstract

The invention discloses a pipeline hydraulic self-energized flow monitoring device, which comprises a static part and a rotating part, and is characterized in that the static part comprises a stator, a magnetic induction coil, a flange, a fixed bracket, a turbine flowmeter, a rotary connecting device and a cap piece; the rotating component comprises a rotating wheel device, a neodymium-iron permanent magnet and a self-lubricating bearing; the rotating wheel device comprises blades and a hub body. The pipeline hydroelectric generation device and the turbine flowmeter are combined, water flows through the pipeline hydroelectric generation device to wash blades, an electromagnetic module in the device generates current through electromagnetic induction to supply the current to the turbine flowmeter and capture information, and the problem that the turbine flowmeter needs an external power source to work is effectively solved; the magnetic induction coil and the fusion rotor are fixed in the shell, absolute isolation sealing is achieved, conveyed fluid media are prevented from infiltrating a power generation equipment part, flanges are designed on the two sides of a pipeline, sealing connection with other pipelines is achieved, and equipment installation and disassembly are convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of integration of fluid machinery and intelligent sensors, and particularly relates to a pipeline hydraulic self-powered flow monitoring device. Background Art

[0002] At present, turbine flowmeters have been widely used in the flow monitoring fields of factory fluid pipelines and municipal water supply pipelines due to their high precision and high response characteristics, and can real-time feedback the flow rate and flow velocity information of the fluid in the pipeline, providing an important basis for leakage monitoring. However, at the present stage, turbine flowmeters generally rely on external power supply, resulting in the need for their installation positions to be close to power interfaces, and it is difficult to deploy in remote areas or complex working conditions; at the same time, voltage fluctuations or accidental power outages of external power supplies are likely to cause measurement data deviations or even equipment damage, and the exposed power supply lines also pose safety hazards. In addition, although existing waste energy recovery technologies can achieve partial energy conversion, their structures are complex, the energy conversion efficiency is low, and the functions are single, and they cannot form a synergy with flow monitoring devices, restricting their application value in the intelligent management of pipe networks.

[0003] Therefore, in order to solve the problems of limited power supply, insufficient reliability of turbine flowmeters and low efficiency of waste energy recovery devices, a new self-powered technical solution is urgently needed. The present invention integrates a turbine flowmeter and a waste energy recovery system, and through optimizing the integration of the energy conversion mechanism and the monitoring function, realizes the dual goals of pipe network leakage monitoring and efficient waste energy recovery, which is of great significance for improving the intelligent and energy-saving levels of pipe network systems. Summary of the Invention

[0004] An object of the present invention is to provide a pipeline hydraulic self-powered flow monitoring device, which uses an integrated technology to solve the disadvantages of the existing turbine flowmeters that require external power supply and the single function of waste energy recovery technology.

[0005] In particular, the present invention provides a pipeline hydraulic self-powered flow monitoring device, including a stationary part and a rotating part; The stationary part includes a stator, a magnetic induction coil, a fixed bracket, a turbine flowmeter, a connecting flange, a rotary connection device and a cap; the stator is integrally formed in a pipeline-like structure, and an annular cavity is integrally formed inside the stator wall, and the magnetic induction coil is installed in the annular cavity of the stator; the fixed bracket is fixed at the water inlet formed inside the stator tube; the stator is integrally formed with a turbine flowmeter outside the wall corresponding to the annular cavity, the inside of the turbine flowmeter communicates with the annular cavity, a circuit board is arranged inside the turbine flowmeter, the circuit board includes a monitoring circuit and an induction current rectification and voltage stabilization circuit, and a display screen is arranged outside; the connecting flange is fixed at both ends of the stator; a rotary connection device is installed in the center of the fixed bracket, and a cap is fixedly installed at the head end of the rotary connection device after passing through the fixed bracket; The rotating parts include an impeller, a hub body, an impeller shell, a neodymium iron permanent magnet, and a self-lubricating bearing; the impeller is integrally connected to the central hub body, the rotating connection device passes through the shaft tube in the center of the hub body, a self-lubricating bearing is installed between the hub body shaft tube and the head end of the rotating connection device, and a cap is also installed outside the hub body shaft tube; the impeller shell surrounds the outer edge of the impeller; the neodymium iron permanent magnet is distributed in the impeller shell using an asymmetric magnetic circuit design.

[0006] Preferably, the fixing bracket is made of 304 stainless steel, the airfoil of the blade adopts an airfoil optimized for pipeline water flow characteristics, and its thickness-chord ratio is between 0.2 and 0.26; the blade inlet section adopts a gradually expanding streamlined design to better guide the water flow in, and its length L accounts for 0.3-0.4 of the blade chord length; the outlet section is a swept-back guide structure, and the outlet section length L accounts for 0.6-0.7 of the blade chord length; the axial length L of the entire turbine satisfies 1.0m≤L ≤2.0m to adapt to pipes of common diameters.

[0007] Preferably, the NdFeP magnets of the impeller housing are constructed using an axial gradient magnetic field, and are arranged alternately with NSNS polarity, with the center spacing between adjacent magnets being 1.8 times the width of the magnets.

[0008] Preferably, the impeller hub body and the rim are evenly distributed with adjustable bolt holes in the circumference, each hole corresponds to a different blade installation angle α, and the adjustment range of α is ±10°; the blade is fixedly connected to the hole by a locking bolt, and is provided with an angle scale mark and an anti-loosening structure.

[0009] Preferably, the contact surface of the conical surface matching structure of the rotary connection device and the cap is coated with a molybdenum disulfide solid lubricating layer, and the thickness d satisfies 50≤d≤80μm.

[0010] Preferably, the impeller housing and the impeller are designed as an integrated structure.

[0011] Preferably, the stator and the pipeline are integrated into an integrated design, the pipeline is a magnetic conductive pipeline with an inner diameter of D, the bracket thickness T satisfies T=K1×D, wherein 0.015≤K1≤0.025; the bracket width W satisfies W=K2×D, wherein 0.03≤K2≤0.04; the bracket is installed at a distance S from the water inlet that satisfies S=K3×D, wherein 0.1≤K3≤0.15; the overall distance S1 between the bracket and the impeller satisfies S1=K4×D, wherein 0.004≤K4≤0.007; the hub diameter D1 satisfies D1=K5×D, wherein 0.25≤K5≤0.55; the rim diameter D2 satisfies D2=K6×D, wherein 0.6≤K6≤0.9; the hub body axial thickness H satisfies H=K7×D, wherein 0.08≤K7≤0.25.

[0012] Preferably, the magnetic conduction pipeline, the integrated rotor axial flow impeller group, the self-lubricating bearing and the rotary connection device are all made of insulating non-ferromagnetic materials.

[0013] With the above technical solutions, the beneficial effects of the present invention are as follows: 1. At the water inlet, the axial flow guiding structure is used to uniform the flow field. The water flow impacts the open wide high-efficiency zone airfoil blades along the outer diameter direction, generating a high torque coefficient, reducing the hydraulic loss. At the same time, the spiral arrangement design of the blades enables the water flow to quickly separate from the impeller after being impacted, improving the overall hydraulic efficiency.

[0014] 2. By setting the open wide high-efficiency zone airfoil blades with a uniform spiral arrangement, the water flow in the pipeline scours the blades and impacts along the outer diameter direction and then quickly leaves the impeller, improving the work efficiency, obtaining a large lift-drag ratio, and at the same time, it is easier to reach the maximum torque coefficient.

[0015] 3. The present invention is designed by integrating the radial shaft system and the axial flow structure, canceling the traditional vertical shaft system, reducing the space occupied by internal parts, reducing the friction loss, and being adaptable to the pipe diameter range of DN50 - DN300. 4. Under the condition of ensuring the basic operation of the device, the present invention simplifies the device structure, cancels the traditional vertical shaft system structure, adopts the axial flow structure, greatly reduces the space occupied by internal parts, greatly reduces the installation difficulty, expands the applicable range of the device in the pipeline situation, reduces the loss, improves the heat dissipation, and greatly improves the energy utilization efficiency.

[0016] 5. The axial flow structure adopted by the present invention reduces the resistance and improves the work efficiency and energy utilization efficiency.

[0017] 6. The present invention deeply integrates the turbine flowmeter and the axial flow power generation unit, uses the fluid kinetic energy to self-power instead of the external power supply, eliminates the safety hazards of the power supply line, and realizes the double improvement of the pipeline leakage monitoring and the surplus energy recovery efficiency.

[0018] 7. An integrated current-torque dual-feedback monitoring system is integrated to diagnose the power generation efficiency and the blade state in real time. When abnormal, it triggers the reverse flushing of the impeller or emergency shutdown to avoid measurement deviation caused by impurity jamming.

[0019] 8. It can be combined with the built-in micro-supercapacitor module to dynamically store the surplus electric energy and distribute it as needed, support continuous power supply to the flowmeter under low flow rate (≥0.3m / s) or intermittent water flow conditions, and provide extended power for auxiliary equipment such as pipeline pressure sensors and wireless transmission modules.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of a pipeline hydraulic self-powered flow monitoring device according to the present invention; Figure 2 It is an explosion diagram of a pipeline hydraulic self-powered flow monitoring device according to the present invention; Figure 3 It is a quarter-sectional structure diagram of a pipeline hydraulic self-powered flow monitoring device according to the present invention; Figure 4 It is a structural diagram of the impeller and the impeller housing of a pipeline hydraulic self-powered flow monitoring device according to the present invention.

[0023] The reference numerals in the drawings are: 1, stationary component; 2, rotating component; 3, seal; 11, stator; 12, magnetic induction coil; 13, fixed bracket; 14, turbine flowmeter; 15, connecting flange; 16, rotary connection device; 17, cap part; 21, impeller; 22, hub body; 23, impeller housing; 24, neodymium iron permanent magnet; 25, self-lubricating bearing. Specific Embodiments

[0024] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0025] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms of "a", "the", and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination".

[0027] Please refer to Figures 1-3 , this invention patent example provides a pipeline hydraulic self-powered flow monitoring device, which utilizes the kinetic energy of water and converts it into electrical energy through a series of processes, including: stator 11, impeller 21, impeller housing 23, magnetic induction coil 12, fixed bracket 13, turbine flowmeter 14, flange 15, neodymium iron permanent magnet 24, rotary connection device 16, self-lubricating bearing 25, cap 18. In the pipeline, along its flow direction, the rotary connection device 16 and the self-lubricating bearing 25 are connected to the fixed bracket 13. The impeller housing 23 contains the neodymium iron permanent magnet 24, and the magnetic induction coils 12 are circumferentially distributed in the stator 11. Constrained by the pipeline, the water flow is evenly distributed in the flow field under the guidance of the fixed bracket 13 at the water inlet, and flushes the impeller 21 at a certain speed and flow direction. Flushing the impeller 21 along the outer diameter direction will generate sufficient torque to rotate the impeller 21. Furthermore, the impeller 21 will drive the neodymium iron permanent magnet 24 in the impeller housing 23 to rotate synchronously, and the magnetic field generated by the neodymium iron permanent magnet 24 will also rotate accordingly. At this time, the magnetic induction coils 12 will remain stationary, causing the coils to cut the magnetic induction lines of the moving magnetic field, thereby generating an induced current, thus realizing the function of power generation by the pipeline water turbine generator and realizing the conversion of mechanical energy into electrical energy; this device realizes the integration of the blades and the neodymium iron permanent magnet 24, thereby simplifying the structure of the entire device, effectively reducing the size and weight of the device, and reducing the noise and vibration during its operation.

[0028] Please refer to Figure 4, as a further embodiment, the fixed bracket (13) is made of 304 stainless steel. The inlet section of the blade adopts a gradually expanding streamline design to better guide the water flow into it. Its length L_in accounts for 0.3 - 0.4 of the blade chord length. The outlet section is a swept-back guide structure, and the outlet section length L_out accounts for 0.6 - 0.7 of the blade chord length. The axial length L of the entire water turbine satisfies 1.0m ≤ L ≤ 2.0m to adapt to pipes with common pipe diameters. In this embodiment, an airfoil impeller 21 is used as the core work - doing component of the hydro - generator, but the actual application is not limited to this type. When the water flow in the pipe scours the impeller 21, the water flow impacts along the outer diameter direction and can quickly leave the impeller 21 after the impact. This characteristic greatly improves the work efficiency. The impeller 21 adopts a uniform spiral arrangement. In this embodiment, the number of impellers 21 is set to 6, and the angle is selected as a moderate value. The design of the above parameters can obtain a large lift - to - drag ratio, enabling the impeller 21 to more efficiently convert the kinetic energy of the water flow into its own mechanical energy. At the same time, this design is also easier to achieve the maximum torque coefficient, thereby significantly improving the work capacity of the water turbine.

[0029] As a further embodiment, the neodymium - iron - boron permanent magnets 24 of the impeller housing 23 are constructed with an axial gradient magnetic field, arranged in an alternating N - S - N - S polarity. The center - to - center distance between adjacent magnets is 1.8 times the width of the magnet. In this embodiment, among the performance parameters of the impeller 21, the selection of the NS value is crucial. If the NS value is small, there may be a leakage phenomenon when the water flow passes through the fixed bracket 13, causing some water flow to not effectively act on the impeller, thus reducing the efficiency. On the contrary, if the NS value is large, a large energy loss will occur to the water flow on the fixed bracket 13, also reducing the overall efficiency of the device. Therefore, in this embodiment, the NS value is taken as a moderate value to ensure that the water wheel rotates stably while maintaining a high energy conversion efficiency.

[0030] At the same time, through certain design of the impeller 21, the water wheel can maintain high - efficiency operation within a wider range of water flow speeds, thereby improving the overall working efficiency of the device. This enables the impeller 21 to better adapt to water flows in various situations. Whether it is a change in water flow speed or a slight fluctuation in water flow direction, the impeller 21 can respond flexibly. This adaptability greatly improves the practicality and universality of the device, enabling it to operate stably and efficiently under different pipe environments and water flow conditions, providing a strong guarantee for the wide application of the pipe hydraulic self - power - supply type flow monitoring device.

[0031] As a further embodiment, adjustable bolt hole positions are evenly distributed circumferentially on the hub body 22 and the wheel rim. Each hole position corresponds to a different blade installation angle α, and the adjustment range of α is ±10°; the blade is fixedly connected to the hole position through a locking bolt, and is provided with an angle scale mark and an anti-loosening structure; in this embodiment, multi-angle adjustable installation of the blade on the impeller hub body 22 is realized.

[0032] Please refer to Figure 1 , as a further embodiment, for the conical surface matching structure of the rotary connection device 16 and the cap 17, a molybdenum disulfide solid lubricating layer is coated on the contact surface, and its thickness d satisfies 50 ≤ d ≤ 80 μm; in this embodiment, the resistance of water flow can be reduced while ensuring fixed connection.

[0033] Please refer to Figures 1-4 , as a further embodiment, the impeller housing 23 and the impeller 21 are designed as an integrated structure; in this embodiment, the stability of the connection during use is enhanced.

[0034] As a further embodiment, the stator (11) and the pipeline are integrally designed. The pipeline is a magnetic conductive pipeline with an inner diameter of D. The thickness T of the bracket satisfies T = K1×D, where 0.015 ≤ K1 ≤ 0.025; the width W of the bracket satisfies W = K2×D, where 0.03 ≤ K2 ≤ 0.04; the installation distance S of the bracket from the water inlet satisfies S = K3×D, where 0.1 ≤ K3 ≤ 0.15; the overall distance S1 between the bracket and the impeller satisfies S1 = K4×D, where 0.004 ≤ K4 ≤ 0.007; the hub diameter D1 satisfies D1 = K5×D, where 0.25 ≤ K5 ≤ 0.55; the rim diameter D2 satisfies D2 = K6×D, where 0.6 ≤ K6 ≤ 0.9; the axial thickness H of the hub body satisfies H = K7×D, where 0.08 ≤ K7 ≤ 0.25.

[0035] The magnetic conductive pipeline, the integrated rotor axial flow impeller group, the self-lubricating bearing (25) and the rotary connection device (16) are all made of insulating non-ferromagnetic materials.

[0036] In the practical application of a pipeline hydraulic self-powered flow monitoring device of the present invention, the reasonable design of the structural dimensions is crucial. As Figure 1As shown, in this embodiment, the pipeline hydraulic self-powered flow monitoring device has clear key dimension markings. Its pipeline diameter is D, the hub diameter is D1, the rim diameter is D2, and the thickness of the hub body is H. The setting of these dimensions is not arbitrary, but the optimized result obtained through a large number of experiments and theoretical calculations. In practical applications, the pipeline diameter D is preferably 800 mm, D1 is preferably 240 mm, D2 is preferably 560 mm, and H is preferably 70 mm. Such a dimension combination can ensure the efficient operation of the hydro-generator while ensuring the stability and reliability of its structure.

[0037] In the face of pipelines with different pipe diameters, the present invention demonstrates excellent adaptability. We can flexibly change the sizes of various parameters with reference to this proportional size. For example, in some small industrial pipeline scenarios where the pipe diameter is relatively small, the rim diameter D1 and the hub diameter D2 can be appropriately reduced, and at the same time, the thickness H of the hub body can be adjusted to ensure that the device can perfectly fit the pipeline and efficiently convert water energy into electrical energy. In large municipal water supply pipelines where the pipe diameter is large, the corresponding parameters need to be increased to meet the demand for high-power power generation. Through this parameter adjustment mechanism, the present invention can calmly handle the problems faced in different working scenarios. Whether it is complex water flow conditions or special pipeline environments, it can operate stably and provide reliable power supply for users.

[0038] In the present invention, at the connection between the stationary part 1 and the rotating part 2, a sealing treatment process that has been repeatedly tested and carefully designed is used. Under the harsh working conditions of high-speed rotation, this sealing structure can not only steadily meet the basic sealing requirements and prevent liquid or gas leakage, but also cleverly achieve the coaxial rotation of the rotating part. This design greatly reduces the extra structure, the weight of the device is reduced, and it can easily handle the sealing problem in both high-pressure and low-pressure working environments. At the same time, it simplifies the device structure, effectively avoiding the phenomenon of water seeping into the winding and causing short circuits or electric leakage, and comprehensively ensuring the service life and operation safety of the machine.

[0039] Next, to facilitate the understanding of the above technical solutions of the present invention, the actual working principle and operation method will be described in detail below.

[0040] The working process of the present invention is as follows: When the pipeline hydraulic self-powered flow monitoring device of the present invention is working, a series of energy conversion processes are carried out relying on the special environment of the pipeline. When the water flow enters the pipeline hydro-generator unit in an orderly manner under the constraint of the pipeline. At the water inlet, the fixed bracket 13 guides the water flow, making the originally complex and changeable flow field become uniform and orderly. After being guided by the fixed bracket 13, the water flow scours the impeller 21 with a specific speed and flow direction.

[0041] The water flow that flushes along the outer diameter direction of the impeller 21 will generate a powerful enough torque, which becomes the core driving force for the rotation of the impeller 21. The impeller 21 starts to rotate under the action of the water flow, and the blades closely connected to it also rotate synchronously. It is worth mentioning that outside the impeller 21, neodymium iron permanent magnets 24 are cleverly buried, and the rotation of the impeller will drive the outer neodymium iron permanent magnets 24 to rotate together. During the rotation of the neodymium iron permanent magnets 24, a continuously rotating magnetic field will be generated.

[0042] In the turbine flowmeter 14 of the present invention, when the water flow passes through the flowmeter, it drives the turbine blades to rotate, and then drives the rotation of the magnetic field of the neodymium iron permanent magnets 24. At this time, the magnetic induction coil 12 will continuously cut the magnetic induction lines in the moving magnetic field. According to the electromagnetic induction principle, when the magnetic induction coil 12 cuts the magnetic induction lines, an induced current will be generated in the conductor. This induced current is collected and rectified, and is used to supply power to the flowmeter itself to support functions such as information acquisition and data transmission. Through the above design, the turbine flowmeter 14 of the present invention realizes the self-power supply function, efficiently converts the mechanical energy of the water flow into electrical energy, and at the same time the optimized electromagnetic conversion mechanism further improves the energy conversion efficiency, ensuring the stable operation and accurate measurement of the flowmeter.

[0043] The turbine flowmeter 14 of the present invention has an integrated structure. By burying the neodymium iron permanent magnets 24 in the impeller housing 23, the structure of the entire pipe-type hydrogenerator is simplified. At the same time, the size and weight of the device are effectively reduced, the noise and vibration during its operation are reduced, the applicable range of the device in the pipeline situation is expanded, the loss is reduced, the heat dissipation is improved, and the energy utilization efficiency is greatly improved. In addition, the installation angle of the blades in the runner device can be adjusted, expanding the high-efficiency area of the device and improving the working efficiency and energy conversion ability of the pipeline hydraulic self-powered flow monitoring device. When dealing with the connection problem between the stationary part and the rotating part, a flange 15 sealing structure is adopted, which realizes the coaxial rotation of the rotating part while meeting the required dynamic and static connection and sealing of the device, and meets the sealing problem in different working conditions in the pipeline, simplifying the equipment. The present invention also improves the simplicity of device installation and the structural integrity of the device, improves the heat dissipation effect, and also improves the utilization efficiency of the water energy in the pipeline.

[0044] The pipeline hydraulic self-powered flow monitoring device of the present invention realizes energy conversion and self-power supply functions based on the principle of electromagnetic induction. When water flows through the flowmeter, the kinetic energy of the water drives the turbine blades to rotate, which in turn drives the rotation of the magnetic field of the neodymium iron permanent magnet 24. The rotation of the neodymium iron permanent magnet 24 causes its magnetic field to move relative to the magnetic induction coil fixed in the flowmeter housing. The magnetic induction coil 12 generates an induced electromotive force under the cutting action of the magnetic field and forms an induced current. The induced current is converted into stable DC electrical energy after rectification and voltage stabilization processing, providing electrical energy support for the electronic components of the flowmeter to achieve the self-power supply function without external power input. At the same time, by optimizing the layout of the magnetic induction coil 12 and the magnetic field intensity of the permanent magnet, the present invention further improves the energy conversion efficiency.

[0045] In practical applications, the present invention can not only efficiently convert the mechanical energy of water flow into electrical energy, but also collect flow data in real time through built-in sensors and transmit the data to an external monitoring system. This self-powered design reduces the dependence on external power supplies, lowers the installation and maintenance costs of the device, and improves the applicability and reliability of the device in complex environments.

[0046] After considering the specification and the practice disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present application are pointed out by the claims.

[0047] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A pipeline hydraulic self-powered flow monitoring device, comprising a stationary component (1) and a rotating component (2); The stationary component (1) comprises a stator (11), a magnetic induction coil (12), a fixing bracket (13), a turbine flowmeter (14), a connecting flange (15), a rotating connecting device (16) and a cap (17); the stator (11) is in the form of a pipe as a whole, an annular cavity is integrally formed in the wall of the stator (11), and the magnetic induction coil (12) is installed on the stator (11). The annular cavity; the fixed bracket (13) is fixed at the water inlet formed in the stator (11) tube; the stator (11) is integrally formed with a turbine flowmeter (14) outside the wall of the corresponding annular cavity, the turbine flowmeter (14) is connected to the annular cavity, a circuit board is arranged inside the turbine flowmeter (14), the circuit board includes a monitoring circuit and an induction current rectification and voltage stabilization circuit, and a display screen is arranged outside; the connecting flange (15) is fixed to both ends of the stator (11); a rotating connection device (16) is arranged at the center of the fixed bracket (13), and a cap (17) is fixedly arranged after the head end of the rotating connection device (16) penetrates the fixed bracket (13); The rotating component (2) comprises an impeller (21), a hub body (22), an impeller shell (23), a neodymium iron permanent magnet (24), and a self-lubricating bearing (25); the impeller (21) is integrally connected to the hub body (22) at the center, the rotating connection device (16) passes through the shaft tube at the center of the hub body (22), a self-lubricating bearing (25) is installed between the shaft tube of the hub body (22) and the head end of the rotating connection device (16), and a cap (17) is also installed outside the shaft tube of the hub body (22); the impeller shell (23) surrounds the outer edge of the impeller (21); the neodymium iron permanent magnet (24) is distributed in the impeller shell (23) using an asymmetric magnetic circuit design.

2. A pipeline hydraulic self-powered flow monitoring device according to claim 1, characterized in that: The fixing bracket (13) is made of 304 stainless steel. The airfoil of the blade is an airfoil optimized for pipeline water flow characteristics, and its thickness-chord ratio is between 0.2 and 0.

26. The blade inlet section adopts a gradually expanding streamlined design to better guide the water flow in, and its length L accounts for 0.3-0.4 of the blade chord length. The outlet section is a swept-back guide structure, and the outlet section length L accounts for 0.6-0.7 of the blade chord length; the axial length L of the entire turbine satisfies 1.0m≤L ≤2.0m.

3. A pipeline hydraulic self-powered flow monitoring device according to claim 1, characterized in that: The neodymium iron permanent magnets (24) of the impeller housing (23) are constructed using an axial gradient magnetic field and are arranged alternately in NSNS polarity, with the center spacing between adjacent magnets being 1.8 times the width of the magnets.

4. A pipeline hydraulic self-powered flow monitoring device according to claim 1, characterized in that: The impeller hub body (22) and the rim are evenly distributed with adjustable bolt holes in the circumference, each hole corresponding to a different blade installation angle α, and the adjustment range of α is ±10°; the blade is fixedly connected to the hole by a locking bolt, and is provided with an angle scale mark and an anti-loosening structure.

5. A pipeline hydraulic self-powered flow monitoring device according to claim 1, characterized in that: The conical surface matching structure of the rotary connection device (16) and the cap member (17) has a contact surface coated with a molybdenum disulfide solid lubricating layer, the thickness d of which satisfies 50≤d≤80 μm.

6. A pipeline hydraulic self-powered flow monitoring device according to claim 1, characterized in that: The impeller housing (23) and the impeller (21) are designed as an integrated structure.

7. A pipeline hydraulic self-powered flow monitoring device according to claim 1, characterized in that: The stator (11) and the pipeline are integrated into an integrated design. The pipeline is a magnetic conductive pipeline with an inner diameter of D. The bracket thickness T satisfies T=K1×D, wherein 0.015≤K1≤0.025; the bracket width W satisfies W=K2×D, wherein 0.03≤K2≤0.04; the bracket is installed at a distance S from the water inlet that satisfies S=K3×D, wherein 0.1≤K3≤0.15; the overall distance S1 between the bracket and the impeller satisfies S1=K4×D, wherein 0.004≤K4≤0.007; the hub diameter D1 satisfies D1=K5×D, wherein 0.25≤K5≤0.55; the rim diameter D2 satisfies D2=K6×D, wherein 0.6≤K6≤0.9; and the hub body axial thickness H satisfies H=K7×D, wherein 0.08≤K7≤0.

25.

8. A pipeline hydraulic self-powered flow monitoring device according to claim 7, characterized in that: The magnetically conductive pipe, the integrated rotor axial flow impeller assembly, the self-lubricating bearing (25) and the rotary connection device (16) are all made of insulating non-ferromagnetic materials.

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