An adaptive anti-interference vortex flowmeter and a measuring method thereof

Abstract

The present application belongs to the technical field of flow measurement, and particularly relates to a self-adaptive anti-interference vortex flowmeter and a measurement method thereof. The vortex flowmeter comprises the following steps: S1, switching the flow channel cross-sectional area by a multi-stage passageway switching ball valve at the inlet side and the outlet side of the flowmeter, so that the fluid flow rate falls into a preset measurement interval; S2, starting a rotary drive mechanism to drive a rotary sleeve integrated with a vortex generator and a detection probe to rotate; S3, identifying the azimuth angle corresponding to the maximum amplitude in the vibration signal, driving the rotary sleeve to rotate to a target azimuth, so that the longitudinal direction of the vortex generator is in the same direction as the maximum amplitude azimuth; and S4, monitoring the non-vortex frequency disturbance received by the vortex generator. The vortex generator is actively rotated by the rotary drive mechanism, so that the longitudinal direction of the vortex generator is in the same direction as the direction of the maximum vibration amplitude monitored in real time. The direct interference of pipeline vibration on vortex generation stability is reduced.

Description

Technical Field

[0001] This invention belongs to the field of flow measurement technology, and particularly relates to an adaptive anti-interference vortex flow meter and its measurement method. Background Technology

[0002] A vortex flow meter is a flow measurement instrument based on the karman vortex street principle. It calculates the flow rate by detecting the frequency of vortices generated when fluid flows through a non-streamlined vortex generator. Its measurement accuracy is often severely affected by external mechanical vibrations and changes in fluid state (especially over a wide velocity range).

[0003] To overcome the interference problem, existing research mainly focuses on two aspects: I. Adjusting the flow channel cross-section to improve vibration resistance. Chinese invention patent CN202510041608.7 (A vibration-resistant vortex flowmeter) proposes to replace traditional vibration frequency detection with a differential pressure system consisting of a detection pressure tube and a balance pressure tube, thereby avoiding the direct impact of vibration on the sensor signal. Simultaneously, adjusting the deformable rubber ring changes the inlet flow area, aiming to improve the measurement signal strength at low flow velocities. However, its differential pressure detection system structure is relatively complex; the adjustment of flow velocity relies on the deformation of the elastic body (rubber ring), which may disrupt the stability of the flow field. More importantly, it cannot cope with directional pipe vibration; when a fixed vortex generator is continuously impacted in a specific direction, its own stability and the mass of vortex shedding will still decrease, thus affecting measurement accuracy.

[0004] II. Constructing a physical isolation barrier and performing signal compensation. Chinese invention patent application CN202511697109.X (An adaptive vibration suppression vortex flowmeter and method) uses a multi-level vibration isolation structure, including vibration isolation pads, damping devices, and a protective shell, and integrates a temperature sensor for real-time compensation to attenuate the effects of external vibrations and temperature changes. While its complex isolation layer can attenuate broadband vibrations, it is difficult to completely block them, especially for vibrations with frequencies close to or strongly directional from the vortex shear frequency, where the isolation effect is limited. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing an adaptive anti-interference vortex flow meter and its measurement method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a measurement method for an adaptive anti-interference vortex flowmeter, comprising the following steps: S1. By switching the cross-sectional area of ​​the flow channel through the multi-stage diameter switching ball valve on the inlet and outlet sides of the flow meter, the fluid velocity falls into the preset measurement range.

[0007] S2. Start the rotary drive mechanism to drive the rotary sleeve, which integrates a vortex generator and a detection probe, to rotate and collect multi-directional pipeline vibration signals in real time.

[0008] S3. Identify the azimuth angle corresponding to the maximum amplitude in the vibration signal, drive the rotating sleeve to rotate to the target azimuth, so that the longitudinal direction of the vortex generator is in the same direction as the azimuth of the maximum amplitude, so as to reduce the influence of pipeline vibration on the vortex generation state.

[0009] S4. Monitor the non-vortex frequency disturbances experienced by the vortex generator, and generate resistance by using an electromagnetic damping module installed inside the vortex generator to suppress the non-working frequency displacement of the moving conductor.

[0010] An adaptive anti-interference vortex flow meter includes: Main housing.

[0011] A rotatable sleeve is mounted inside the main housing, and a vortex generator and a detection probe for detecting vortex signals are mounted on the rotatable sleeve.

[0012] The front and rear variable diameter valve units are respectively located at both ends of the main housing, and each variable diameter valve unit includes a multi-stage diameter switching ball valve.

[0013] The converter is electrically connected to the detection probe, the rotary drive mechanism, and the variable diameter valve unit.

[0014] Furthermore, the rotary drive mechanism includes a rotary motor mounted on the main housing, which drives the rotary sleeve to rotate via a small synchronous pulley, a belt, and a large synchronous pulley.

[0015] Furthermore, the vortex generator is equipped with an active energy dissipation mechanism, which includes a generator shell and a connecting body disposed therein; the connecting body is connected to the rotating sleeve via a connecting rod; the guide post is fixedly installed on the inner wall of the generator shell and passes through the guide hole on the connecting body to form a sliding guide fit between the generator shell and the connecting body; the two ends of the balance tension spring are respectively connected to the corresponding connection points of the generator shell and the connecting body to provide a centering and restoring force when the generator shell is deviated from the center by external vibration.

[0016] Furthermore, the active energy dissipation mechanism also includes an electromagnetic damping module composed of a moving conductor and a sealing coil; a through hole is provided on the connecting body, and the sealing coil is located in the through hole; the top of the moving conductor is fixed to the inner top wall of the generator housing, and the bottom of the moving conductor extends into the sealing coil; wherein, the generator housing moves relative to the connecting body along the guide column under the vibration of the pipeline, and the vibration is reduced by the damping force of the balance tension spring and the electromagnetic damper.

[0017] Furthermore, the multi-stage diameter switching ball valve has a three-layer nested structure, including a large-diameter ball, a medium-diameter ball, and a small-diameter ball arranged concentrically from the outside to the inside, and a large-diameter drive shaft, a medium-diameter drive shaft, and a small-diameter drive shaft respectively fixedly connected to the three balls and concentrically fitted together; by driving the corresponding ball to rotate independently through each drive shaft, the switching of different orifice diameter channels can be realized.

[0018] Furthermore, the large-diameter sphere, medium-diameter sphere, and small-diameter sphere are all provided with standard diameter through holes and graded through holes corresponding to their diameters; the graded through holes include large-diameter holes, medium-diameter holes, and small-diameter holes; by adjusting the relative rotational positions of the three layers of spheres, the graded through holes of the target diameter are made to coincide with the standard diameter through holes of the other spheres on the flow channel axis, thereby realizing the graded adjustment of the flow channel cross-sectional area.

[0019] That is: the large-diameter sphere has a through large-diameter hole; the medium-diameter sphere has a through medium-diameter hole; and the small-diameter sphere has a through small-diameter hole. Furthermore, each of the three spheres is equipped with a corresponding standard diameter through hole, and the flow channel diameter can be switched by adjusting the relative rotation position of the three spheres.

[0020] Furthermore, each variable diameter valve unit also includes a variable diameter control unit, which includes a large diameter control disc driven by a variable diameter motor, and a medium diameter control disc and a small diameter control disc arranged coaxially. The large-diameter control panel is equipped with a first lever, which cooperates with the 90° control groove on the medium-diameter control panel to realize the delayed linkage between the large-diameter ball and the medium-diameter ball; The intermediate diameter control panel is equipped with a second lever, which cooperates with the 180° control slot on the minor diameter control panel to achieve delayed linkage between the intermediate diameter ball and the minor diameter ball.

[0021] Furthermore, a detection sensor is also installed on the main housing. The detection sensor is an accelerometer, which is used to acquire the vibration frequency and amplitude data of the pipeline in different directions. Based on the real-time vibration data collected by the detection sensor, the maximum amplitude direction is locked, and the rotating sleeve is driven to rotate until the longitudinal center plane of the vortex generator coincides with the maximum amplitude direction, so as to minimize the impact of pipeline vibration on vortex stability.

[0022] Furthermore, the converter controls the magnitude of the current applied to the sealing coil based on the relative displacement and velocity fed back by the displacement detection element, so as to suppress the vibration of the generator housing in the interference frequency band through the eddy current damping effect generated by the moving conductor.

[0023] In a preferred embodiment, the main housing adopts a sealed structure; it includes an integral chamber formed by the fastening connection of a lower fixing member and an upper fixing member; a sealing cover is sealed and fastened to the top of the upper fixing member, which completely encloses the rotary motor, sensor and electrical control circuit in the non-overflow area of ​​the main housing.

[0024] Compared with the prior art, the present invention has the following advantages.

[0025] This invention utilizes a rotary drive mechanism to actively rotate the vortex generator, aligning its longitudinal direction with the direction of the maximum vibration amplitude detected in real time. This aligns the core sensitive element (vortex generator) with the direction of least vibration influence, reducing the direct interference of pipeline vibration on the stability of vortex generation. Simultaneously, an active energy dissipation mechanism composed of electromagnetic damping modules is integrated inside the vortex generator. When the generator shell is affected by external vibration, this mechanism provides a restoring force through a balance spring and generates resistance opposite to the velocity of the interfering vibration through electromagnetic damping, actively suppressing vibration displacement in non-operating frequency bands.

[0026] This invention achieves precise, graded adjustment of the flow cross-sectional area through a multi-stage diameter switching ball valve, which can automatically switch to the optimal flow measurement range based on the actual flow velocity. Furthermore, the delayed linkage mechanism of the diameter-changing control unit enables complex adaptive adjustment to be achieved through a compact and reliable structure. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0028] Figure 1 This is a front view of the anti-interference vortex flow meter and its measurement method.

[0029] Figure 2 This is an overall cross-sectional view of the anti-interference vortex flow meter and its measurement method.

[0030] Figure 3 This is a cross-sectional view of the variable diameter valve unit of the anti-interference vortex flow meter and its measurement method.

[0031] Figure 4 A three-dimensional view of a variable-diameter sphere for an anti-interference vortex flow meter and its measurement method.

[0032] Figure 5 This is a front view of the variable diameter sphere for an anti-interference vortex flow meter and its measurement method.

[0033] Figure 6 This is a cross-sectional view of a variable-diameter sphere for an anti-interference vortex flow meter and its measurement method.

[0034] Figure 7 This is a schematic diagram of a single variable diameter ball assembly for an anti-interference vortex flowmeter and its measurement method.

[0035] Figure 8 This is a front view of the anti-interference vortex flow meter and its measurement method variable diameter control unit.

[0036] Figure 9 This is a cross-sectional view of the anti-interference vortex flow meter and the variable diameter control unit for the measurement method.

[0037] Figure 10 Three-dimensional view of the control panel for anti-interference vortex flowmeter and measurement method Figure 1 .

[0038] Figure 11 Three-dimensional view of the control panel for anti-interference vortex flowmeter and measurement method Figure 2 .

[0039] Figure 12 A three-dimensional view of the rotating unit of the anti-interference vortex flowmeter and its measurement method.

[0040] Figure 13 A three-dimensional view of the rotating sleeve for an anti-interference vortex flow meter and its measurement method.

[0041] Figure 14 This is a cross-sectional view of the rotary sleeve of an anti-interference vortex flowmeter and its measurement method.

[0042] Figure 15 Cross-section of vortex generator for anti-interference vortex flow meter and measurement method Figure 1 .

[0043] Figure 16 Cross-section of vortex generator for anti-interference vortex flow meter and measurement method Figure 2 .

[0044] In the diagram, 1. Main housing; 2. Rotating body unit; 3. Vortex generator; 4. Detection unit; 5. Front reducer valve unit; 6. Front reducer control unit; 7. Rear reducer valve unit; 8. Rear reducer control unit; 101. Lower fixing component; 102. Upper fixing component; 103. Sealing cover; 104. Front connecting pipe; 105. Rear connecting pipe; 201. Rotary sleeve; 202. Rotary motor; 203. Small synchronous pulley; 204. Belt; 205. Large synchronous pulley; 206. Generator mounting hole; 207. Detection probe mounting hole; 208. Connecting column; 209. Sealing groove; 210. Sliding bearing groove; 301. Generator housing; 302. Guide post; 303. Balance spring; 304. Motion conductor; 305. Connector; 306. Sealing coil; 307. Connecting rod; 401. Detection probe; 402. Detection sensor; 404. Converter; 501. Valve body; 502. Sealing ring; 503. Flange; 504. Pipe cavity; 505. Upper flange; 506. Multi-stage diameter switching ball valve; 5061. Large diameter ball; 5062. Medium diameter ball; 5063. Small diameter ball; 5064. Large diameter drive shaft; 5065. Medium diameter drive shaft; 5066. Small diameter drive shaft; 5067. Large diameter bore; 5068. Medium diameter bore; 5069. Small diameter bore; 50610. Mounting hole; 50611. Standard diameter through hole; 601. Drive shaft housing; 602. Upper cover; 603. Variable diameter motor; 604. Gear; 605. End cover; 607. Small diameter control panel; 608. Medium diameter control panel; 609. Large diameter control panel; 610. Small diameter primary drive shaft; 611. Medium diameter primary drive shaft; 612. Large diameter primary drive shaft; 613. Medium diameter secondary gear shaft; 614. Large diameter secondary gear shaft; 615. First lever; 616. Second lever; 617. 90° control slot; 618. 180° control slot. Detailed Implementation

[0045] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0046] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0047] Depending on the context, words such as “if” or “suppose” used here can be interpreted as “when”, “in response to determination”, or “in response to detection”.

[0048] For ease of understanding, the embodiments of this disclosure will be described in detail first.

[0049] like Figure 1-16 As shown in the embodiment: I. Adaptive anti-interference vortex flow meter, the overall structure of which consists of main housing 1, rotating body unit 2, vortex generator 3, detection unit 4, front diameter reducing valve unit 5, rear diameter reducing valve unit 7 and corresponding control unit.

[0050] The main housing 1, serving as both the carrier and sealing shell of the entire flowmeter, is a separate unit for easy internal assembly. Specifically, it consists of a lower fixing member 101 and an upper fixing member 102 connected by bolts to form a hollow, integral chamber. The central part of this chamber is the flow passage area, with the front and rear ends connected to the front and rear connecting pipes 104 and 105 respectively for pipe connection. The upper part of the chamber is the non-flow passage area, housing the drive and sensing components. A sealing cover 103 is sealed to the top of the upper fixing member 102 via a flange or groove, completely enclosing the upper area. The sealing cover has pre-drilled holes or mounting bases for cable routing or mounting the converter 404.

[0051] The rotating sleeve 201 is a cylindrical rotatable component, supported at the center of the flow area of ​​the main housing 1 by sliding bearings at both ends. Sliding bearing grooves 210 are provided at both ends of the inner wall of the rotating sleeve 201 for installing sliding bearings to support the entire rotating sleeve 201. Connecting columns 208 are coaxially fixed to the outer sides of both ends of the rotating sleeve 201, and large synchronous pulleys 205 are mounted on the connecting columns 208. In the middle of the cylindrical wall of the rotating sleeve 201, radially arranged are a generator mounting hole 206 and one or more detection probe mounting holes 207, used for mounting the vortex generator 3 and the detection probe 401, respectively.

[0052] As a preferred embodiment, an annular sealing groove 209 is provided at the end face where the rotating sleeve 201 connects with the front and rear pipes, which is used to seal the interconnected pipelines during the rotation of the rotating sleeve to prevent liquid and gas leakage.

[0053] The reducing valve unit includes a front reducing valve unit 5 located on the inlet side of the flowmeter and a rear reducing valve unit 7 located on the outlet side. Each unit includes a multi-stage diameter switching ball valve 506 installed within the valve housing 501 cavity. Flanges 503 for connecting pipelines are provided at both ends of the valve housing 501. A pipeline cavity 504 is formed inside the valve housing 501, and the left and right flanges 503 communicate with the pipeline cavity 504 for fluid flow. An upper flange 505 is provided at the upper end of the valve housing 501 for installing the reducing control unit.

[0054] II. In the rotary drive mechanism: there are two rotary motors 202, which are mounted on the outer top wall of the upper fixed member 102, and each rotary motor 202 has a small synchronous pulley 203 mounted on the output shaft end; on the left and right outer walls of the rotary sleeve 201, two large synchronous pulleys 205 are coaxially fixed through connecting columns 208; a closed belt 204 is simultaneously wound around the small synchronous pulley 203 and the large synchronous pulley 205 on the same side, forming a synchronous belt drive pair. When the rotary motors 202 start, the power is transmitted to the large synchronous pulleys 205 through the small synchronous pulleys 203 and the belt 204, thereby driving the rotary sleeve 201 to rotate.

[0055] III. Active energy dissipation mechanism installed inside vortex generator 3: The vortex generator 3 is fixed to the rotating sleeve 201 via a connecting rod 307, which is a hollow tube structure used for wiring. During installation, the end of the connecting rod 307 extends slightly from the generator mounting hole 206 or is flush with both ends to facilitate wiring. Furthermore, the length of the generator cable must be sufficient or allow for a certain margin when the rotating sleeve 201 rotates ±90 degrees.

[0056] The generator housing 301 is a hollow structure with a U-shaped cross-section. Two parallel guide posts 302 are disposed within the hollow structure. A connecting body 305 is slidably connected to the guide posts 302 within the hollow structure. The connecting body 305 has guide holes that mate with the guide posts 302, and the two guide posts 302 pass through their respective guide holes, forming a sliding fit.

[0057] Specifically, the connecting body 305 is connected to the rotating sleeve 201 via the connecting rod 307. Corresponding balance spring connection points are provided on the inner top and bottom walls of the generator housing 301, as well as on the upper and lower end faces of the connecting body 305. The two ends of two balance springs 303 are hooked or screwed between these corresponding connection points, forming a symmetrically arranged return spring system. When external vibration causes the generator housing 301 to deviate from its central position, the balance springs 303 are stretched or compressed, generating an elastic restoring force pointing towards the center, forcing the generator housing 301 to return to its initial equilibrium position.

[0058] Furthermore, the active energy dissipation mechanism also includes an electromagnetic damping module: a cylindrical mounting hole is vertically formed on the connector 305, and a cylindrical sealing coil 306 is interference-fitted or glued inside the hole. The inside of the coil is a hollow channel. A cylindrical moving conductor 304 is coaxially inserted into the hollow channel, with one end fixed to the inner wall of the generator housing 301 and the other end freely suspended inside the coil, with a small gap between them to allow relative movement. Thus, the moving conductor 304 and the sealing coil 306 together constitute a linear electromagnetic damper.

[0059] In a preferred embodiment, the moving conductor 304 is made of copper or aluminum. Additionally, the generating or rotating body unit 2 is equipped with a displacement monitoring element, which is connected to the converter 404. The displacement monitoring element is used to collect the displacement of the moving conductor 304 relative to the sealing coil 306 and feed it back to the control module in the converter 404. It obtains real-time speed information by differentiating the displacement signal and calculates the optimal braking current value accordingly. This current is applied to the winding of the sealing coil 306 to generate a controlled magnetic field.

[0060] When the moving conductor 304 cuts the magnetic field lines as the pipe vibrates, eddy currents are induced inside it. These eddy currents interact with the controlled magnetic field to generate an electromagnetic damping force (Ampere force) that is always opposite to the direction of motion. This damping force, in conjunction with the resetting effect of the balance spring 303, quickly converts the vibration kinetic energy generated by the generator housing 301 into heat energy and dissipates it. Thus, mechanical disturbances are quickly suppressed in the non-operating interference frequency range (such as the natural frequency range of the pipe), realizing the braking and near-stationary state of the generator relative to the connecting body 305, ensuring that the flow meter only responds to the eddy current signal generated by the fluid.

[0061] In summary, the implementation of anti-interference measurement in vortex generator 3: When the pipeline vibrates, the vibration is transmitted to the connecting body 305 through the rotating sleeve 201 and the connecting rod 307. Due to inertia, the housing 301 of the generating body will have an off-center displacement and relative velocity relative to the connecting body 305 along the guide post 302.

[0062] At this time, the balance spring 303 is stretched or compressed, generating a restoring force that acts on the generator housing 301, attempting to pull it back to the central equilibrium position.

[0063] The controller (which can be integrated into the converter and is electrically connected to the detection sensor 402, the rotary motor 202, and the sealing coil 306) reads the displacement and velocity of the moving conductor 304 relative to the sealing coil 306 in real time and calculates the target current input to the sealing coil 306. The moving conductor 304 moves in a changing magnetic field and generates induced eddy currents, thus producing an electromagnetic damping force opposite to the direction of motion. During the mutual conversion between the potential energy of the spring and the kinetic energy of the moving conductor, the electromagnetic damper continuously dissipates the kinetic energy as heat. Under the combined effect of the restoring force and the damping force, the generator housing 301 can eliminate the vibration influence along the fastest path, quickly return to a stationary state, and thus ensure the accuracy of vortex shedding signal detection.

[0064] IV. The front and rear reducing valve units have the same structure. One reducing valve unit is connected in series on each side of the main housing 1, and both include a valve housing 501 and a multi-stage diameter switching ball valve 506. The assembly structure includes: the left and right ends of the valve housing 501 are connected to the measuring pipe via flanges 503, forming a fluid flow channel cavity 504 inside; the multi-stage diameter switching ball valve 506 is installed inside the valve housing 501, with sealing rings 502 on both sides of the ball valve to ensure no internal leakage of fluid. The multi-stage diameter switching ball valve 506 adopts a three-layer concentric nested structure (more layers can be set according to actual needs): the outermost layer is a large-diameter ball 5061, the middle layer is a medium-diameter ball 5062, and the innermost layer is a small-diameter ball 5063. All three are precision-machined hollow spheres, and they rotate relative to each other through spherical mating. A large-diameter sphere 5061 has a large-diameter drive shaft 5064 fixedly connected to its top center; a medium-diameter sphere 5062 has a medium-diameter drive shaft 5065 fixedly connected to its top; and a small-diameter sphere 5063 has a small-diameter drive shaft 5066 fixedly connected to its top. The three drive shafts are coaxially fitted together, with the small-diameter drive shaft 5066 passing through the central hole of the medium-diameter drive shaft 5065, which in turn passes through the central hole of the large-diameter drive shaft 5064, forming a three-stage coaxial drive structure. Each sphere is composed of two hemispheres detachably connected by screws in multiple mounting holes 50610 distributed along the equatorial plane, facilitating assembly and maintenance. By independently driving each drive shaft to rotate, the corresponding sphere can be rotated around the flow channel axis, thereby switching between different flow channel combinations with different apertures. Simultaneously, a friction sealing ring is provided on the drive shaft of each layer of spheres to increase the starting resistance of the drive shaft, effectively preventing the rotation of adjacent spheres during the rotation of each layer of spheres.

[0065] In addition, each of the three spheres has a standard diameter through-hole 50611 (A-diameter through-hole) in the left-right direction to ensure basic flow capacity. That is, the large, medium, and small diameter spheres also have corresponding B-diameter, C-diameter, and D-diameter through-holes, with B-diameter being larger than C-diameter, and C-diameter being larger than D-diameter; and each graded through-hole is opened along the front-back direction of the corresponding sphere. When all A-diameter through-holes are aligned with the pipe, it is a fully open standard pipe diameter. It should be noted that the standard diameter through-holes 50611 and the graded through-holes 5067, 5068, and 5069 on the large-diameter sphere 5061, medium-diameter sphere 5062, and small-diameter sphere 5063 are all through-holes extending along the diameter of the sphere, ensuring unobstructed fluid flow when rotated to the aligned position.

[0066] When it is necessary to switch to a certain gear (such as a small flow diameter), the three-layer spheres are driven to rotate to a specific angle, so that the graded through-hole of the target gear (for example, the small-diameter hole 5069) completely coincides with the standard-diameter through-holes 50611 on the other two layers of spheres on the axis of the flow channel, forming a continuous and through minimum flow channel; similarly, if a medium flow diameter is required, the medium-diameter hole 5068 is aligned with the standard-diameter through-holes on the large and small spheres; if the maximum flow diameter is required, it is only necessary to align all the standard-diameter through-holes 50611 on all spheres. This design realizes multi-stage discrete adjustment of the cross-sectional area of the flow channel. The standard-diameter through-holes have the same aperture.

[0067] The specific variable diameter control process is as follows: Control process of changing from the standard diameter port to the B diameter port: The variable diameter motor 603 drives the large-diameter control disc 609 to rotate 90° counterclockwise (the medium-diameter control disc 608 and the small-diameter control disc 607 remain stationary), and the B diameter port becomes the liquid flow port.

[0068] Control process of changing from the standard diameter port to the C diameter port: The variable diameter motor 603 drives the large-diameter control disc 609 to continue rotating 90 degrees counterclockwise (180° counted from the start). While the large-diameter control disc 609 rotates, it uses the first shift lever 615 to toggle the medium-diameter control disc 608 to rotate 90° in the 90° control groove 617 (the small-diameter control disc 607 remains stationary), and the C diameter port becomes the liquid flow port.

[0069] Control process of changing from the standard diameter port to the D diameter port: The variable diameter motor 603 drives the large-diameter control disc 609 to continue rotating 180 degrees counterclockwise (360° counted from the start). While the large-diameter control disc 609 rotates, it uses the first shift lever 615 to toggle the medium-diameter control disc 608 to continue rotating 180° in the 90° control groove 617 (270° counted from the start). While the medium-diameter control disc 608 rotates, it uses the second shift lever 616 to toggle the small-diameter control disc 607 to rotate 90° in the 180° control groove 618. The D diameter port becomes the liquid flow port.

[0070] The above is the variable diameter control process. If it is necessary to restore to the standard diameter port after the variable diameter is completed, reset is performed by rotating counterclockwise according to the rotation angle of each control disc to return to the initial state, and then the above actions are repeated.

[0071] 5. The specific structure and assembly of the variable diameter control unit 6 matched with each variable diameter valve unit are as follows: The variable diameter control unit 6 includes a transmission shaft housing 601 that is butt-connected with the upper flange 505 on the valve housing 501 by bolts, and the upper cover housing 602 is fastened to the upper end of the transmission shaft housing 601 to form a sealed inner cavity.

[0072] The small-diameter drive shaft 5066 extends upward and is fixedly connected to the small-diameter primary drive shaft 610 via a keyway or spline; the medium-diameter drive shaft 5065 is fixedly connected to the medium-diameter primary drive shaft 611, which is integrally formed with the medium-diameter secondary gear shaft 613; the large-diameter drive shaft 5064 is fixedly connected to the large-diameter primary drive shaft 612, which is integrally formed with the large-diameter secondary gear shaft 614.

[0073] At the end of the drive shaft, the small-diameter first-stage drive shaft 610 is fixedly connected to the small-diameter control panel 607, the medium-diameter first-stage drive shaft 611 is fixedly connected to the medium-diameter control panel 608, and the large-diameter first-stage drive shaft 612 is fixedly connected to the large-diameter control panel 609.

[0074] A variable-diameter motor 603 is mounted on the top of the upper cover 602. Its output shaft passes downward through the end cover 605, and a gear 604 is installed at the shaft end. This gear 604 meshes with the tooth surface on the outer circumference of the large-diameter control disc 609. A first lever 615 is fixed near the edge of the upper surface of the large-diameter control disc 609. One end of the lever 615 extends into a 90° control groove 617 on the intermediate-diameter control disc 608. When the intermediate-diameter control disc 608 rotates 90° with the large-diameter control disc 609, the first lever 615 abuts against the end wall of the control groove 617, thereby driving the intermediate-diameter control disc 608 to start rotating. Similarly, a second lever 616 is fixed on the upper surface of the intermediate-diameter control disc 608. One end of the lever extends into a 180° control groove 618 on the small-diameter control disc 607, realizing delayed linkage between the intermediate-diameter ball and the small-diameter ball. This mechanical linkage mechanism ensures that the three-stage ball valves operate sequentially in a preset order, avoiding flow channel misalignment or jamming.

[0075] It should be noted that in this invention, the standard diameter orifice (A-diameter through hole) corresponds to the original diameter of the pipe. When the fluid is under normal operating conditions (optimal flow rate range), it provides a perfectly matched, non-reduced diameter channel to reduce pressure loss and ensure the reference measurement accuracy of the flow meter. Without intervention, the standard diameter orifices of the three-layer spheres remain aligned, allowing the flow meter to operate as a standard device and ensuring pipeline compatibility.

[0076] The standard orifice is the zero point of the diameter change logic. Switching from the standard orifice to the diameter change orifice (B, C, D diameter) is based on a centrally symmetrical orifice change. This ensures a more uniform flow velocity distribution than simply relying on the irregular shape created by the misalignment of the standard orifice, thus ensuring measurement accuracy. By controlling the rotation angle combination of the control disc assembly, the selected diameter change orifice is aligned with the center of the pipe.

[0077] The control logic is as follows: When the flow rate is too slow, resulting in a weak signal or being drowned out by noise, the drive ball valve switches to a smaller orifice step by step to amplify the vortex energy.

[0078] When excessive flow rate leads to decreased accuracy or positive deviation, the motor-driven ball valve switches back to a larger orifice to bring the flow rate back to a reasonable range.

[0079] VI. The detection sensor 402 installed on the main housing 1 is specifically a triaxial accelerometer, which is fixed to the upper fixing part 102 by screws. The sensitive axis direction covers multiple directions around the pipe. The sensor 402 collects the vibration acceleration signals of the pipe in the three orthogonal directions of X, Y, and Z in real time and transmits the data to the converter 404. The converter 404 has a built-in signal processing module that performs spectrum analysis and amplitude comparison on the vibration signals in each direction to identify the direction angle of maximum vibration energy (i.e., maximum amplitude). Subsequently, the control system issues a command to drive the rotary motor 202, which drives the rotary sleeve 201 to rotate until the longitudinal center plane of the vortex generator 3 (i.e., the normal direction of its upstream surface) coincides with the direction of the maximum amplitude. Under this attitude, the lateral disturbance caused by pipe vibration has the least impact on the symmetry of vortex shedding.

[0080] Work process: 1. Connect the vortex flow meter to the measuring pipeline system.

[0081] 2. Continuously monitor the vortex shedding signal frequency and determine whether the flow velocity is within the preset optimal measurement range: If the flow rate is below the lower threshold, the vortex signal is weak or cannot be generated stably. At this time, the multi-stage diameter switching ball valve 506 is driven by the variable diameter control unit 6 to reduce the cross-sectional area of ​​the flow channel and increase the flow rate to the effective detection range. If the flow velocity exceeds the upper limit threshold, the flow channel cross-sectional area is increased to reduce the flow velocity to a reasonable range, thereby providing stable and suitable flow velocity conditions for vortex shedding detection.

[0082] 3. The accelerometer 402 installed on the main housing 1 collects the vibration signals of the pipeline in all directions in real time. The converter 404 analyzes the signals and identifies the azimuth angle corresponding to the maximum amplitude. Then, the rotary drive mechanism (such as the rotary motor 202) is controlled to drive the rotary sleeve 201 to rotate until the longitudinal center plane of the vortex generator 3 is in the same direction as the maximum amplitude, so as to reduce the impact of pipeline vibration on the stability of vortex shedding.

[0083] 4. The vibration of the pipeline is transmitted to the connecting body 305 inside the vortex generator 3 via the rotating sleeve 201 and connecting rod 307, causing the generator shell 301 to shift relative to the connecting body 305 along the guide post 302: Symmetrically arranged balance springs 303 provide restoring force, causing the generator housing 301 to tend toward the center position; The displacement detection element monitors the displacement and velocity of the moving conductor 304 relative to the sealing coil 306 in real time and feeds it back to the converter 404. The converter calculates and outputs a control current to the sealing coil 306 based on the motion state, so that the moving conductor 304 generates an eddy current damping force when it moves in the magnetic field. The direction of this force is always opposite to the vibration velocity, thereby achieving active suppression of vibration. Under the combined action of the spring restoring force and the electromagnetic damping force, the vibration energy of the generator housing 301 is quickly converted into heat energy and dissipated, allowing it to quickly return to a static state and ensuring that the vortex street signal detection is not disturbed by mechanical vibration.

[0084] 5. After completing the above adjustments, the flow meter enters high-precision measurement mode. The system continuously monitors changes in operating conditions and automatically repeats steps 2 to 4 when the flow velocity or vibration characteristics exceed the set threshold, achieving all-time adaptive anti-interference operation.

[0085] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. An adaptive anti-interference vortex flow meter, characterized in that, include: Main shell (1); A rotating sleeve (201) is rotatably mounted inside the main housing (1), and a vortex generator (3) and a detection probe (401) for detecting vortex signals are mounted on the rotating sleeve (201). The front variable diameter valve unit (5) and the rear variable diameter valve unit (7) are respectively located at both ends of the main housing (1), and each variable diameter valve unit includes a multi-stage diameter switching ball valve (506). The multi-stage diameter switching ball valve (506) has a three-layer nested structure, including a large-diameter ball (5061), a medium-diameter ball (5062), and a small-diameter ball (5063) arranged concentrically from the outside to the inside, and a large-diameter drive shaft (5064), a medium-diameter drive shaft (5065), and a small-diameter drive shaft (5066) respectively fixedly connected to the three balls and concentrically fitted together; by driving the corresponding ball to rotate independently through each drive shaft, the switching of different orifice channels can be realized; Each variable diameter valve unit also includes a variable diameter control unit (6), which includes a large diameter control disc (609) driven by a variable diameter motor (603), and a medium diameter control disc (608) and a small diameter control disc (607) coaxially arranged; the large diameter control disc (609) is provided with a first lever (615), which cooperates with the 90° control groove (617) on the medium diameter control disc (608) to realize the delayed linkage between the large diameter ball and the medium diameter ball; the medium diameter control disc (608) is provided with a second lever (616), which cooperates with the 180° control groove (618) on the small diameter control disc (607) to realize the delayed linkage between the medium diameter ball and the small diameter ball; The converter (404) is electrically connected to the detection probe (401), the rotary drive mechanism and the variable diameter valve unit respectively; The main housing (1) is also equipped with a detection sensor (402), which is an acceleration sensor used to acquire the vibration frequency and amplitude data of the pipeline in different directions; based on the real-time vibration data collected by the detection sensor (402), the maximum amplitude direction is locked, and the rotating sleeve (201) is driven to rotate until the longitudinal center plane of the vortex generator (3) coincides with the maximum amplitude direction.

2. The vortex flow meter as described in claim 1, characterized in that, The rotary drive mechanism includes a rotary motor (202) mounted on the main housing (1), which drives the rotary sleeve (201) to rotate via a small synchronous pulley (203), a belt (204) and a large synchronous pulley (205).

3. The vortex flow meter as described in claim 1, characterized in that, The vortex generator (3) is equipped with an active energy dissipation mechanism, which includes a generator housing (301) and a connecting body (305) located inside it. The connecting body (305) is connected to the rotating sleeve (201) via a connecting rod (307). A guide post (302) is fixedly installed on the inner wall of the generator housing (301) and passes through a guide hole on the connecting body (305) to form a sliding guide fit between the generator housing (301) and the connecting body (305). The two ends of a balance tension spring (303) are respectively connected to the corresponding connection points of the generator housing (301) and the connecting body (305) to provide a centering force when the generator housing (301) is deviated from the center by external vibration.

4. The vortex flow meter as described in claim 3, characterized in that, The active energy dissipation mechanism also includes an electromagnetic damping module consisting of a moving conductor (304) and a sealing coil (306); a through hole is provided on the connecting body (305), and the sealing coil (306) is located in the through hole; the top of the moving conductor (304) is fixed to the inner top wall of the generator housing (301), and the bottom of the moving conductor (304) extends into the sealing coil (306); wherein, the generator housing (301) moves relative to the connecting body (305) along the guide column (302) under the vibration of the pipeline, and the vibration is reduced by the damping force of the balance tension spring (303) and the electromagnetic damping module.

5. The vortex flow meter as described in claim 1, characterized in that, The large-diameter sphere (5061), medium-diameter sphere (5062), and small-diameter sphere (5063) are each provided with a standard diameter through hole and a graded through hole corresponding to its diameter; the graded through holes include a large-diameter hole (5067), a medium-diameter hole (5068), and a small-diameter hole (5069); by adjusting the relative rotational position of the three spheres, the graded through hole of the target diameter is made to coincide with the standard diameter through hole of the other spheres on the flow channel axis, thereby realizing the graded adjustment of the flow channel cross-sectional area.

6. The vortex flow meter as described in claim 4, characterized in that, The converter (404) controls the magnitude of the current applied to the sealing coil (306) based on the relative displacement and velocity fed back by the displacement detection element, so as to suppress the vibration of the generator housing (301) in the interference frequency band through the eddy current damping effect generated by the moving conductor (304).

7. A measurement method based on the adaptive anti-interference vortex flowmeter according to claim 6, characterized in that, Including the following steps: S1. By switching the cross-sectional area of ​​the flow channel through the multi-stage diameter switching ball valve on the inlet and outlet sides of the flow meter, the fluid velocity falls into the preset measurement range. S2. Start the rotary drive mechanism to drive the rotary sleeve, which integrates the vortex generator and the detection probe, to rotate and collect multi-directional pipeline vibration signals in real time. Among them, the detection sensor collects the vibration acceleration signals of the pipeline in the three orthogonal directions of X, Y and Z in real time and transmits the data to the converter. S3. The converter performs spectrum analysis and amplitude comparison on the vibration signals in each direction, identifies the azimuth angle corresponding to the maximum amplitude in the vibration signal, and drives the rotating sleeve to rotate to the target azimuth, so that the longitudinal direction of the vortex generator is in the same direction as the azimuth of the maximum amplitude, thereby reducing the influence of pipeline vibration on the vortex generation state. S4. Monitor the non-vortex frequency disturbances experienced by the vortex generator, and generate resistance through an electromagnetic damping module installed inside the vortex generator to suppress the non-working frequency displacement of the moving conductor; the displacement detection element monitors the displacement and velocity of the moving conductor relative to the sealing coil in real time and feeds it back to the converter. The converter calculates and outputs a control current to the sealing coil based on the motion state, so that the moving conductor generates eddy current damping force when moving in the magnetic field. The direction of this force is always opposite to the vibration velocity.

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