A pipeline flow metering device

Abstract

The application discloses a pipeline flow metering device and belongs to the technical field of flow meters. The pipeline flow metering device comprises a measuring pipe body, the inside of the measuring pipe body is provided with a front flow guide assembly, a turbine measuring assembly and a rear flow guide assembly, the rear flow guide assembly is a rectifier grid structure composed of a plurality of porous plates, and the two ends of the turbine measuring assembly are connected with the front flow guide assembly and the rear flow guide assembly respectively. The pipeline flow metering device can automatically remove dirt on the turbine rotor and the turbine shaft without disassembly by integrating the shaft-mounted vibrator and the rotor-built-in vibrator, the maintenance frequency and cost are reduced, the water cooling jacket and the heat dissipation fin are adopted, the working temperature of the magnetostrictive rod and the magnetostrictive laminated sheet is effectively reduced, the stability and reliability of the system are improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow meter, in particular to a pipeline flow metering device. BACKGROUND

[0002] In the field of fluid measurement, turbine flow meters are widely used due to their high precision, good repeatability and wide applicability. However, one of the main problems faced by traditional turbine flow meters is the deposition of dirt on the turbine rotor and turbine shaft, which can cause measurement errors to increase and require regular maintenance and cleaning. In addition, traditional cleaning methods often rely on mechanical cleaning or chemical cleaning, which not only takes time and effort, but also can cause damage to the equipment. Therefore, developing a turbine flow meter that can self-clean and maintain long-term stability has become an important demand in the industry. SUMMARY

[0003] The purpose of the present application is to provide a pipeline flow metering device that can automatically remove dirt on the turbine rotor and turbine shaft without disassembly by integrating a shaft-mounted vibrator and a rotor-mounted vibrator, thereby reducing maintenance frequency and cost and solving the problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solution: a pipeline flow metering device, comprising a measuring pipe body, the measuring pipe body is internally provided with a front flow guide assembly, a turbine measuring assembly and a rear flow guide assembly, the rear flow guide assembly is a rectifier grid structure composed of a plurality of perforated plates, the two ends of the turbine measuring assembly are respectively connected with the front flow guide assembly and the rear flow guide assembly, the front flow guide assembly is installed at the inlet end of the measuring pipe body, and the measuring pipe body is integrated with an intelligent sensor module.

[0005] Preferably, the turbine measuring assembly comprises a turbine rotor and a turbine shaft, the two ends of the turbine shaft are respectively connected with the front flow guide assembly and the rear flow guide assembly for supporting the position of the turbine rotor, the turbine shaft is provided with a shaft-mounted vibrator, and the turbine rotor is internally provided with a rotor-mounted vibrator, the turbine rotor is vibrated by the shaft-mounted vibrator and the rotor-mounted vibrator, thereby playing a self-cleaning role, the turbine rotor is provided with a blade on the outer ring, and a neodymium magnet is embedded in the blade, the rotation speed of the turbine rotor is detected and identified by a Hall sensor, and the flow of fluid is calculated.

[0006] Preferably, the shaft-mounted vibrator comprises a magnetostrictive rod, a driving coil, a water cooling jacket and a biasing magnetic ring, the driving coil is coaxially sleeved on the outside of the magnetostrictive rod, the water cooling jacket is sleeved on the outside of the driving coil, the water cooling jacket is provided with a spiral groove, the spiral groove on the water cooling jacket increases the flow path of the cooling liquid, thereby improving the heat dissipation efficiency, and the end of the water cooling jacket is provided with the biasing magnetic ring, and the biasing magnetic ring is connected with the inner wall of the turbine shaft in interference.

[0007] Preferably, the end of the turbine shaft is sleeved with a vibration isolation ring, and the turbine shaft is connected with the front flow guide assembly and the rear flow guide assembly through the vibration isolation ring, the ring can effectively block the transmission of mechanical vibration to the front flow guide assembly and the rear flow guide assembly, avoid resonance with the turbine shaft, and protect the stability and reliability of the whole system.

[0008] Preferably, the two ends of the turbine shaft are conical structures, which play a guiding role, and a connecting short shaft is arranged at the connection between the turbine shaft and the turbine rotor, the connecting short shaft is connected with the turbine shaft through a bearing, and the contact surface of the connecting short shaft and the bearing is provided with a spiral flow guide groove, the spiral interval of the spiral flow guide groove close to the front flow guide assembly is smaller than that of the spiral flow guide groove close to the rear flow guide assembly, the dense spiral groove at the front end improves the scouring of fluid on the bearing wall, avoids the deposition of dirt on the inner wall of the bearing, the loose spiral groove at the rear end is more conducive to the discharge of dirt, and the spiral flow guide groove comprises parallel arranged deep grooves and shallow grooves, the deep grooves are used to improve the scouring force, and the shallow grooves are convenient for the discharge of dirt and prevent deposition, when the fluid passes through the deep and shallow spiral flow guide grooves, a heavy and light impact force is generated on the inner wall of the bearing, like waves, which is conducive to improving the self-cleaning ability of the bearing.

[0009] Preferably, the rotor built-in vibrator comprises an outer shell, a receiving coil, a magnetostrictive sheet, a heat dissipation fin and a mass balance cavity, the outer shell is made of titanium alloy material, the receiving coil is welded in the outer shell by laser, the inner circle of the receiving coil is provided with the magnetostrictive sheet, the receiving coil and the magnetostrictive sheet are vacuum sealed, the inner side of the magnetostrictive sheet is provided with the heat dissipation fin, and the heat dissipation fin is distributed around the mass balance cavity, the heat dissipation fin is a copper-diamond composite fin, and a microneedle array is adopted.

[0010] Preferably, the front flow guide assembly comprises a flow guide cone and a flow guide blade, and the flow guide blades are arranged at equal distances around the flow guide cone, and the ends of the flow guide blades are fixedly connected with the inner wall of the measuring tube body.

[0011] Preferably, the intelligent sensor module comprises a Hall sensor, which detects the rotating speed of the turbine rotor.

[0012] A vibration monitoring sensor detects the vibration state of the turbine rotor.

[0013] A temperature sensor adopts an insertion structure to monitor the temperature of the fluid.

[0014] A pressure sensor measures the pressure of the measuring tube body.

[0015] The signal processing unit integrates an AI algorithm to process the signals received by the sensor, including flow calculation and vibration compensation calculation. The vibration monitoring sensor detects the vibration state of the turbine rotor. The frequency analysis module of the signal processing unit extracts the vibration characteristics and combines the adaptive filtered flow signal to calculate the final flow value using an intelligent signal compensation algorithm.

[0016] The wireless communication module is used for transmitting data.

[0017] Preferably, the Hall sensor senses the magnetic field change of the neodymium magnet during the rotation of the turbine rotor. The Hall sensor is electrically connected to the signal processing unit, which converts each sensed magnetic field change into an electric pulse signal and transmits it to the signal processing unit. The signal processing unit calculates the rotational speed of the turbine rotor and obtains the flow rate of the fluid. The signal processing unit specifically includes:

[0018] The signal acquisition submodule receives the electric pulse signal transmitted by the Hall sensor and amplifies and shapes the signal to obtain the target electric pulse signal.

[0019] The counting submodule counts the target electric pulse signal within a predetermined time length to obtain pulse data.

[0020] The analysis submodule obtains the pulse data within a predetermined time length and calculates the rotational speed of the turbine rotor using the following formula:

[0021]

[0022] where ω is the rotational speed, N is the number of pulses, m is the number of neodymium magnets, and t is the predetermined time.

[0023] The flow rate v of the pipeline fluid is calculated based on the rotational speed of the turbine rotor.

[0024]

[0025] where v is the flow rate of the pipeline fluid, S is the cross-sectional area of the pipeline, and δ is the instrument coefficient of the pipeline flowmeter.

[0026] The flow rate of the fluid is obtained by multiplying the flow rate of the fluid by the cross-sectional area of the pipeline.

[0027] Preferably, the electric pulse signal shaping process includes removing noise interference and compensating for deviations caused by turbine rotor vibration. Specifically, it includes:

[0028] The electrical pulse signal transmitted from the Hall sensor is first filtered by the first filter to remove noise and unwanted frequency components, and the electrical pulse signal with excessively high or low amplitude is removed by the limiting circuit to obtain the preliminary electrical pulse signal.

[0029] The real-time vibration parameters of the turbine rotor, including amplitude and vibration frequency, are obtained based on vibration monitoring sensors. The time values ​​of obtaining the real-time vibration parameters of the turbine rotor are recorded, and each acquisition time is used as a sampling point to form a continuous sampling interval.

[0030] Within the sampling interval, select the amplitude and / or vibration frequency values ​​of the turbine rotor that exceed the preset amplitude threshold and preset vibration frequency, and record the corresponding time values ​​as abnormal sampling times.

[0031] The preliminary electrical pulse signal detected at the abnormal acquisition time is acquired, and the preliminary electrical pulse signal is processed by the second filter. The second filter adaptively adjusts the filter coefficients through an adaptive filtering algorithm to minimize the output error.

[0032] The initial electrical pulse signal is processed by the second filter to form a compensated electrical pulse signal.

[0033] The compensation electrical pulse signal and the preliminary electrical pulse signals (excluding those in the sampling interval) are recombined in chronological order to form the target electrical pulse signal.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] This invention discloses a pipeline flow metering device that integrates a shaft-mounted vibrator and a rotor-embedded vibrator. This device can automatically remove dirt from the turbine rotor and turbine shaft without disassembly, reducing maintenance frequency and costs. The use of a water-cooled jacket and heat dissipation fins effectively reduces the operating temperature of the magnetostrictive rod and magnetostrictive laminations, improving system stability and reliability and extending service life. The design of the flow guiding component ensures the stability of the fluid before it enters the turbine rotor, reducing the impact of turbulence on the measurement. The design of the spiral flow guide groove enhances the self-cleaning capability of the bearings, preventing performance degradation caused by dirt deposition. A Hall sensor detects the turbine rotor speed, and combined with data from temperature and pressure sensors, the fluid flow rate can be accurately calculated. The signal processing unit integrates AI algorithms, achieving intelligent compensation of the flow rate value through vibration state analysis and adaptive filtering of the flow signal, further improving measurement accuracy. Attached Figure Description

[0036] Figure 1 This is a structural diagram of the pipeline flow metering device of the present invention;

[0037] Figure 2 Figure 1 is an exploded view of the front flow guide assembly, turbine measurement assembly and rear flow guide assembly of the present application;

[0038] Figure 3 Figure 2 is a front view of the turbine shaft of the present application;

[0039] Figure 4 Figure 3 is a partial cross-sectional view of the turbine shaft of the present application;

[0040] Figure 5 Figure 4 is a cross-sectional view of the turbine rotor of the present application.

[0041] In the figure: 1, measurement tube body; 2, front flow guide assembly; 21, flow cone; 22, flow vane; 3, turbine measurement assembly; 31, turbine rotor; 311, housing; 312, receiving coil; 313, magnetostrictive stack; 314, heat dissipation fin; 315, mass balance cavity; 316, impeller; 32, turbine shaft; 321, magnetostrictive rod; 322, drive coil; 323, water cooling jacket; 324, bias magnetic ring; 325, vibration isolation ring; 326, connecting stub shaft; 3261, helical flow guide groove; 4, rear flow guide assembly; 5, intelligent sensor module. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] To solve the main problem that the existing conventional turbine flowmeter faces, i.e. dirt deposition on the turbine rotor and turbine shaft, which can cause measurement error to increase and require regular maintenance and cleaning. In addition, the conventional cleaning method often relies on mechanical cleaning or chemical cleaning, which not only consumes time and effort, but also can cause damage to the equipment. Please refer to Figures 1-5 The technical solutions of the present application are as follows:

[0044] A pipeline flow metering device, comprising a measurement tube body 1, a front flow guide assembly 2, a turbine measurement assembly 3 and a rear flow guide assembly 4 are arranged inside the measurement tube body 1, the turbine measurement assembly 3 is connected with the front flow guide assembly 2 and the rear flow guide assembly 4 at both ends respectively, the front flow guide assembly 2 is installed at the inlet end of the measurement tube body 1, and an intelligent sensor module 5 is integrated on the measurement tube body 1.

[0045] Specifically, the turbine measuring assembly 3 comprises a turbine rotor 31 and a turbine shaft 32, two ends of the turbine shaft 32 are connected with the front flow guide assembly 2 and the rear flow guide assembly 4 respectively, the position of the turbine shaft 32 is used for supporting the turbine rotor 31, the turbine shaft 32 is provided with an axial vibrator, a cavity is formed in the turbine rotor 31, and a rotor built-in vibrator is arranged in the cavity. The turbine rotor 31 is driven to vibrate through the axial vibrator and the rotor built-in vibrator, dirt deposited on the turbine rotor 31 and the turbine shaft 32 is prevented, and the self-cleaning effect is achieved.

[0046] More specifically, the shaft-mounted vibrator includes a magnetostrictive rod 321, a drive coil 322, a water cooling jacket 323, and a biasing magnetic ring 324. The drive coil 322 is coaxially sleeved on the outside of the magnetostrictive rod 321, and the magnetostrictive rod 321 and the drive coil 322 adopt a non-contact gap fit. The gap distance is set to 0.15±0.02 mm, and the gap is filled with heat-conducting silicone grease. The drive coil 322 skeleton is made of alumina ceramic. When the system starts, the drive coil 322 is supplied with alternating current. This current will generate a changing magnetic field around the drive coil 322. Due to the non-contact gap fit between the magnetostrictive rod 321 and the drive coil 322, and the filling of heat-conducting silicone grease to improve heat conduction efficiency, as the alternating magnetic field generated by the drive coil 322 changes, the magnetostrictive rod 321 will undergo periodic expansion and contraction deformation due to the magnetostrictive effect. The drive coil 322 is sleeved with a water cooling jacket 323, and the water cooling jacket 323 is provided with a spiral groove. The magnetostrictive rod 321 generates heat during operation. These heat is transferred to the drive coil 322 through the heat-conducting silicone grease, and further conducted to the water cooling jacket 323 sleeved outside by the alumina ceramic skeleton. The spiral groove design on the water cooling jacket 323 increases the flow path of the cooling liquid, improves the heat dissipation efficiency, effectively reduces the working temperature of the overall device, and the end of the water cooling jacket 323 is provided with a biasing magnetic ring 324. The biasing magnetic ring 324 is interference connected with the inner wall of the turbine shaft 32. The shaft-mounted vibrator excites axial ultrasonic vibration, which is transmitted to the turbine hub and produces micro displacement on the blade root of the turbine rotor 31, destroys the attachment of pollutants, realizes self-cleaning, and the biasing magnetic ring 324 is arranged at the end of the water cooling jacket 323. It is interference connected with the inner wall of the turbine shaft 32, which provides a stable biasing magnetic field environment for the magnetostrictive rod 321, which helps to optimize the working performance of the magnetostrictive rod 321, so that it can maintain high expansion and contraction response in a wider range. In addition, the turbine shaft 32 is sleeved with a vibration isolation ring 325 at the end. The turbine shaft 32 is connected with the front flow guide assembly 2 and the rear flow guide assembly 4 through the vibration isolation ring 325. In order to prevent the vibration of the turbine shaft 32 from affecting the front flow guide assembly 2 and the rear flow guide assembly 4, the vibration isolation ring 325 is arranged at the end of the turbine shaft 32. This ring can effectively block the transmission of mechanical vibration to the front flow guide assembly 2 and the rear flow guide assembly 4, avoid their resonance with the turbine shaft 32, and thus protect the stability and reliability of the entire system.

[0047] The frequency of the shaft-mounted vibrator is 25-30 kHz, the amplitude control is <50μm, the working mode adopts intermittent, the cleaning period duty cycle is <15%, and the shaft-mounted vibrator mainly cleans the turbine rotor 31 and the root of the blade 316.

[0048] The two ends of the turbine shaft 32 are conical structures, which play a guiding role, and the connection between the turbine shaft 32 and the turbine rotor 31 is provided with a connecting short shaft 326, which is connected with the turbine shaft 32 through a bearing, and the contact surface of the connecting short shaft 326 and the bearing is provided with a spiral flow guide groove 3261. The spiral interval of the spiral flow guide groove 3261 near the one end of the front flow guide assembly 2 is smaller than the spiral interval of the spiral flow guide groove 3261 near the one end of the rear flow guide assembly 4. The dense spiral groove at the front end improves the scouring of the fluid on the bearing wall, avoids the deposition of dirt on the inner wall of the bearing, and the loose spiral groove at the rear end is more conducive to the discharge of dirt, and the spiral flow guide groove 3261 includes parallel arranged deep grooves and shallow grooves. The deep grooves are used to improve the scouring force, and the shallow grooves are convenient for dirt discharge and prevent deposition. When the fluid passes through the deep and shallow spiral flow guide groove 3261, a heavy and light impact force is generated on the inner wall of the bearing, like waves, which is conducive to improving the self-cleaning ability of the bearing. It should be noted that the connecting short shaft 326 is provided with a mu-metal double-layer shielding cover inside, which can attenuate 90% of the stray magnetic field outside the shaft-mounted vibrator, and reduce the influence of the external magnetic field on the shaft-mounted vibrator.

[0049] The rotor built-in vibrator includes a shell 311, a receiving coil 312, a magnetostrictive sheet 313, a heat dissipation fin 314 and a mass balance cavity 315. The shell 311 is made of titanium alloy material, and a permalloy lining is arranged in the inner layer for magnetic field shielding. The receiving coil 312 is laser welded in the shell 311. The magnetostrictive sheet 313 is arranged in the inner circle of the receiving coil 312. The receiving coil 312 and the magnetostrictive sheet 313 are vacuum sealed. The heat dissipation fin 314 is arranged on the inner side of the magnetostrictive sheet 313, and the heat dissipation fin 314 is distributed around the mass balance cavity 315. The heat dissipation fin 314 is a copper-diamond composite fin, which adopts a microneedle array with a height of 0.3mm and a pitch of 0.5mm.

[0050] The frequency selection of the rotor built-in vibrator is 50-60kHz, and the amplitude control is <30μm. Such high-frequency vibration can more effectively cause micro-displacement, which is helpful to break the attachment of more stubborn or small particles of pollutants, and is particularly suitable for cleaning the whole blade 316. The lower amplitude can reduce the mechanical stress on the equipment, while still being sufficient to produce sufficient micro-displacement to achieve cleaning effect.

[0051] When the system starts, the receiving coil 312 is supplied with alternating current, which generates a changing magnetic field around the receiving coil 312. As the alternating magnetic field generated by the receiving coil 312 changes, the magnetostrictive laminations 313 will undergo periodic expansion and contraction due to the magnetostrictive effect. This deformation is caused by the rearrangement of the material's internal magnetic domains under the action of the external magnetic field, resulting in a change in size. The expansion and contraction of the magnetostrictive laminations 313 are converted into mechanical vibrations, which can be directly transmitted inside the turbine rotor 31. This vibration helps to break the attachment points of pollutants, achieving the effect of self-cleaning. The presence of the mass balance cavity 315 is to compensate for the unbalanced weight caused by components such as the magnetostrictive laminations 313 and the heat dissipation fins 314, ensuring the stability of the entire turbine rotor 31 during high-speed rotation.

[0052] The turbine rotor 31 is provided with blades 316, and neodymium magnets are embedded in the blades 316. The rotation speed of the turbine rotor 31 is detected by a Hall sensor, and the flow rate of the fluid is calculated.

[0053] The front flow guide assembly 2 includes a flow guide cone 21 and flow guide blades 22. The flow guide blades 22 are arranged equidistantly around the flow guide cone 21, and the ends of the flow guide blades 22 are fixedly connected to the inner wall of the measuring pipe body 1. The rear flow guide assembly 4 is a flow regulating grid structure composed of multiple perforated plates.

[0054] The intelligent sensor module 5 includes a Hall sensor for detecting the rotation speed of the turbine rotor 31, a vibration monitoring sensor for detecting the vibration state of the turbine rotor 31, a temperature sensor for monitoring the temperature of the fluid, a pressure sensor for measuring the pressure of the measuring pipe body 1, a signal processing unit for processing the signals received by the sensors, including flow calculation and vibration compensation calculation, a wireless communication module for transmitting data.

[0055] Preferably, the Hall sensor detects the change in the magnetic field of the neodymium magnet during the rotation of the turbine rotor 31. The Hall sensor is electrically connected to the signal processing unit, which converts each sensed magnetic field change into an electrical pulse signal and transmits it to the signal processing unit. The signal processing unit calculates the rotation speed of the turbine rotor 31 and obtains the flow rate of the fluid. The signal processing unit specifically includes:

[0056] The signal acquisition sub-module is configured to receive the electric pulse signal transmitted by the Hall sensor, amplify the electric pulse signal, and perform signal shaping processing to obtain a target electric pulse signal.

[0057] The counting sub-module is configured to count the target electric pulse signal within a preset time length to obtain pulse data.

[0058] The analysis sub-module is configured to obtain the pulse data within the preset time length and calculate the rotational speed of the turbine rotor 31 according to the following formula:

[0059]

[0060] wherein ω is the rotational speed, N is the number of pulses, m is the number of neodymium magnets, and t is the preset time.

[0061] The flow rate v of the pipeline fluid is calculated according to the rotational speed of the turbine rotor 31.

[0062]

[0063] wherein v is the flow rate of the pipeline fluid, S is the cross-sectional area of the pipeline, and δ is the instrument coefficient of the pipeline flowmeter.

[0064] The flow rate of the fluid is obtained by multiplying the flow rate of the fluid and the cross-sectional area of the pipeline.

[0065] The principle and effect of the above technical solution are as follows: the Hall sensor is used to sense the magnetic field change of the neodymium magnet during the rotation of the turbine rotor 31 in real time, and the electric pulse signal is collected. The electric pulse signal is amplified and shaped to reduce the influence of noise, vibration and other interference factors on the signal, so that the target electric pulse signal can be obtained for analysis. The rotational speed of the turbine rotor 31 is calculated based on the target electric pulse signal, and then the flow rate v of the pipeline fluid is calculated according to the rotational speed of the turbine rotor 31, and finally the flow rate of the fluid is obtained. The calculation method is stable and reliable.

[0066] Preferably, the electric pulse signal shaping processing includes removing noise interference and compensating for the deviation caused by the vibration of the turbine rotor 31. Specifically, the electric pulse signal shaping processing includes the following steps:

[0067] The electric pulse signal transmitted by the Hall sensor is subjected to first filtering processing by a first filter to filter out noise and unwanted frequency components, and an amplitude limiting circuit is used to remove electric pulse signals with excessively high or low amplitudes to obtain a preliminary electric pulse signal.

[0068] The real-time vibration parameters of the turbine rotor 31, including amplitude and vibration frequency, are obtained based on a vibration monitoring sensor, and the time value at which the real-time vibration parameters of the turbine rotor 31 are obtained is recorded. Each acquisition time is taken as a sampling point to form a continuous sampling interval.

[0069] Screening the amplitude and / or vibration frequency of the turbine rotor 31 in the sampling interval to exceed the preset amplitude threshold and the preset vibration frequency, and recording the corresponding time value as an abnormal collection time;

[0070] Obtaining the preliminary electric pulse signal detected at the abnormal collection time, and performing second filtering processing on the preliminary electric pulse signal through a second filter, the second filter adaptively adjusts the filter coefficients through an adaptive filtering algorithm to minimize the output error; wherein the adaptive filtering algorithm adopts an LMS algorithm, and the formula of the compensation electric pulse signal output after the second filtering processing for the input preliminary electric pulse signal is:

[0071]

[0072] Wherein y(n) is the compensation electric pulse signal output by the second filter at n time, w i (n) is the n time i filter tap coefficient, x(n) is the input preliminary electric pulse signal, x(n-i) is the n-i time input preliminary electric pulse signal, and N is the filter order, which reflects the complexity of the filter structure, usually refers to the power of the highest term in the transfer function, or the number of energy storage elements in the circuit, which can be determined according to the actual selection;

[0073] Adaptively adjusting the filter coefficients through the adaptive filtering algorithm includes calculating the error;

[0074] f(n)=m(n)-y(n), wherein m(n) is the expected electric pulse signal at n time; f(n) is the electric pulse signal error value;

[0075] When the electric pulse signal error value at n time is detected, the updated filter tap coefficient w(n+1) is calculated through the following formula: w(n+1)=w(n)+2uf(n), w(n) is the filter tap coefficient at n time, w(n+1) is the filter tap coefficient at n+1 time, wherein u is the step parameter, and the value range of u is (0.001-0.01);

[0076] The preliminary electric pulse signal is subjected to second filtering processing through the second filter to form a compensation electric pulse signal;

[0077] The compensation electric pulse signal and the rest of the preliminary electric pulse signal except the sampling interval are recombined in time sequence to form a target electric pulse signal.

[0078] The principle and effects of the above technical solution are: the first filter performs first filtering processing, which can preliminarily screen and filter all collected electric pulse signals to obtain a preliminary electric pulse signal; and since the vibration of the turbine rotor 31 can cause errors in the collected signals, the second filter performs second processing on the electric pulse signals collected at the vibration moment, specifically by adaptively adjusting the filter coefficient through an adaptive filtering algorithm to reduce errors.

[0079] Since the filter tap coefficient determines the frequency response of the filter, its value range will affect the stability and filtering effect of the filter, and will also affect the phase characteristics; if the tap coefficient is properly set, the frequency components of the signal can be effectively suppressed to suppress the frequency components of noise and interference signals, thereby improving the reliability and accuracy of the detection result; if the tap coefficient is too large or too small, the filter will diverge or converge slowly, thereby affecting the stability and accuracy of the detection result; therefore, adaptively adjusting the filter tap coefficient can reduce output errors and improve detection accuracy; the present application combines the compensation electric pulse signal after the second filtering processing and the preliminary electric pulse signal except the sampling interval to form a target electric pulse signal, which can improve the accuracy and reliability of the target electric pulse signal; only the target electric pulse signal is accurate and reliable, the pipeline flow value calculated from the target electric pulse signal is accurate; therefore, the processing process of the target electric pulse signal is important for improving the flow calculation result of the present application.

[0080] It should be noted that, in order to ensure accurate flow measurement, it is usually necessary to select a Hall sensor suitable for the working environment, and a temperature sensor and a pressure sensor are used to detect the environmental temperature and pressure; in extreme environments, the Hall sensor can be stopped.

[0081] Working process: fluid enters from the measuring pipe body 1 inlet, through the flow guide cone 21 and adjustable flow guide blade 22 of the front flow guide assembly 2, forms a stable laminar flow, the fluid impacts the blade 316 of the turbine rotor 31, pushes it to rotate, the rotation speed is proportional to the flow, drives the coil 322 to pass through 25-30 kHz alternating current, excites the magnetostrictive rod 321 to generate axial ultrasonic vibration, the vibration is transmitted to the turbine rotor 31 through the turbine shaft 32, destroys the dirt adhesion at the root of the impeller 316, the water cooling jacket 323 circulates the cooling liquid through the spiral groove, the receiving coil 312 receives high-frequency electric energy, drives the magnetostrictive sheet 313 to generate radial micro-vibration with an amplitude of 0.5-3μm, the vibration directly acts on the tip and trailing edge of the impeller 316, removes the micro-particle pollutants, the heat dissipation fin 314 is strengthened by the microneedle array, the neodymium magnet embedded in the blade 316 periodically triggers the Hall sensor, outputs a pulse signal, the vibration sensor at the bearing collects acceleration data, identifies abnormal frequency spectrum, the temperature / pressure sensor corrects the influence of fluid density in real time, the signal processing unit separates the vibration interference through the LSTM algorithm, outputs the compensated flow value, the wireless communication module supports remote diagnosis, the spiral flow guide groove 3261 continuously flushes the bearing, combined with the intermittent vibration mode, realizes zero-maintenance operation.

[0082] It should be noted that the relational terms herein, such as first and second, are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0083] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application.

Claims

1. A pipe flow metering device comprising a measuring pipe body (1), characterized in that: The measuring pipe body (1) is internally provided with a front flow guide assembly (2), a turbine measuring assembly (3) and a rear flow guide assembly (4), the two ends of the turbine measuring assembly (3) are connected with the front flow guide assembly (2) and the rear flow guide assembly (4) respectively, the front flow guide assembly (2) is installed at the inlet end of the measuring pipe body (1), the intelligent sensor module (5) is integrated on the measuring pipe body (1), the flow rate is calculated by detecting the turbine rotating speed through the Hall sensor, vibration compensation is carried out in combination with the vibration monitoring sensor, the adaptive filtering algorithm is adopted to correct the flow signal, and finally the accurate flow value is output, and a wireless communication module is provided to transmit data. The turbine measuring assembly (3) comprises a turbine rotor (31) and a turbine shaft (32), the two ends of the turbine shaft (32) are connected with the front flow guide assembly (2) and the rear flow guide assembly (4) respectively, the turbine shaft (32) is provided with an axle-mounted vibrator, the turbine rotor (31) is internally provided with a rotor-mounted vibrator, and the outer ring of the turbine rotor (31) is provided with a blade (316), and the blade (316) is embedded with a neodymium magnet. The axle-mounted vibrator comprises a magnetostrictive rod (321), a driving coil (322), a water cooling sleeve (323) and a biasing magnetic ring (324), the driving coil (322) is coaxially sleeved on the outside of the magnetostrictive rod (321), the water cooling sleeve (323) is sleeved on the outside of the driving coil (322), the biasing magnetic ring (324) is arranged at the end of the water cooling sleeve (323), and the biasing magnetic ring (324) is in interference connection with the inner wall of the turbine shaft (32). A connecting short shaft (326) is arranged at the connection position of the turbine shaft (32) and the turbine rotor (31), the connecting short shaft (326) is connected with the turbine shaft (32) through a bearing, a spiral flow guide groove (3261) is arranged on the contact surface between the connecting short shaft (326) and the bearing, the spiral interval of the spiral flow guide groove (3261) near the end of the front flow guide assembly (2) is smaller than the spiral interval of the spiral flow guide groove (3261) near the end of the rear flow guide assembly (4), and the spiral flow guide groove (3261) comprises parallel arranged deep grooves and shallow grooves. The rotor-mounted vibrator comprises an outer shell (311), a receiving coil (312), a magnetostrictive laminated sheet (313), a heat dissipation fin (314) and a mass balance cavity (315), the outer shell (311) is made of titanium alloy material, the receiving coil (312) is welded in the outer shell (311) through laser welding, the magnetostrictive laminated sheet (313) is arranged on the inner ring of the receiving coil (312), the receiving coil (312) and the magnetostrictive laminated sheet (313) are vacuum sealed, the heat dissipation fin (314) is arranged on the inner side of the magnetostrictive laminated sheet (313), and the heat dissipation fin (314) is distributed around the mass balance cavity (315).

2. The pipe flow metering device of claim 1, wherein: The end of the turbine shaft (32) is sleeved with a vibration isolation ring (325), and the turbine shaft (32) is connected with the front flow guide assembly (2) and the rear flow guide assembly (4) through the vibration isolation ring (325).

3. The pipe flow metering device of claim 1, wherein: The front flow guide assembly (2) comprises a flow guide cone (21) and a flow guide vane (22), the flow guide vane (22) is arranged equidistantly around the flow guide cone (21), and the end of the flow guide vane (22) is fixedly connected with the inner wall of the measuring pipe body (1).

4. The pipe flow metering device of claim 1, wherein: The intelligent sensor module (5) comprises a Hall sensor for detecting the rotating speed of the turbine rotor (31); A vibration monitoring sensor for detecting the vibration state of the turbine rotor (31); A temperature sensor in a plug-in structure for monitoring the fluid temperature; A pressure sensor for measuring the pressure of the measuring pipe body (1); A signal processing unit integrating an AI algorithm for processing the signals received by the sensor, including flow calculation and vibration compensation calculation, the vibration monitoring sensor detects the vibration state of the turbine rotor (31), the frequency analysis module of the signal processing unit extracts the vibration characteristics, and the intelligent signal compensation algorithm is used for calculation in combination with the flow signal subjected to adaptive filtering, so that the final flow value is finally corrected and output; A wireless communication module for transmitting data.

5. The pipe flow metering device of claim 4, wherein: The Hall sensor senses the magnetic field change of the neodymium magnet during the rotation of the turbine rotor (31), the Hall sensor is electrically connected with the signal processing unit, converts each sensed magnetic field change into an electric pulse signal, and transmits the electric pulse signal to the signal processing unit, the signal processing unit calculates the rotating speed of the turbine rotor (31) and obtains the flow of the fluid, and the signal processing unit specifically comprises: A signal acquisition sub-module for receiving the electric pulse signal transmitted by the Hall sensor, amplifying the electric pulse signal and performing signal shaping processing to obtain a target electric pulse signal; A counting sub-module for counting the target electric pulse signal within a preset time length to obtain pulse data; An analysis sub-module for obtaining the pulse data within the preset time length and calculating the rotating speed of the turbine rotor (31) through the following formula: ； wherein, N is the number of pulses, m is the number of neodymium magnets, and t is the preset time. The flow rate v of the pipeline fluid is calculated according to the rotating speed of the turbine rotor (31): ； wherein A is the cross-sectional area of the pipe, the meter factor of the pipe flowmeter; The flow of the fluid is obtained by multiplying the flow rate of the fluid and the cross-sectional area of the pipeline.

6. The pipe flow metering device of claim 5, wherein: The electric pulse signal shaping processing includes removing noise interference and compensating for the deviation caused by the vibration of the turbine rotor (31), and specifically includes: The electric pulse signal transmitted by the Hall sensor is subjected to first filtering processing through a first filter to filter out noise and unnecessary frequency components, and an amplitude limiting circuit is used to remove electric pulse signals with excessively high or low amplitudes to obtain a preliminary electric pulse signal; Real-time vibration parameters of the turbine rotor (31) are obtained based on the vibration monitoring sensor, including amplitude and vibration frequency, and the time value at which the real-time vibration parameters of the turbine rotor (31) are obtained is recorded, each acquisition time is taken as a sampling point to form a continuous sampling interval; In the sampling interval, the amplitude and / or vibration frequency of the turbine rotor (31) exceeding the preset amplitude threshold and the preset vibration frequency are selected, and the corresponding time value is recorded as an abnormal acquisition time; The preliminary electric pulse signal detected at the abnormal acquisition moment is acquired, and the preliminary electric pulse signal is subjected to second filtering processing through a second filter, and the second filter adaptively adjusts filter coefficients through an adaptive filtering algorithm to minimize output error; After the preliminary electric pulse signal is subjected to second filtering processing through the second filter, a compensation electric pulse signal is formed; The compensation electric pulse signal and the preliminary electric pulse signal except the sampling interval are jointly recombined according to time sequence to form a target electric pulse signal.

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