Self-adaptive anti-interference vortex shedding flowmeter and measuring method thereof

Abstract

The invention belongs to the technical field of flow measurement, and particularly relates to a self-adaptive anti-interference vortex shedding flowmeter and a measurement method thereof. Comprising the following steps: S1, switching the sectional area of a flow channel through multi-stage drift diameter switching ball valves on the inlet side and the outlet side of the flowmeter, so that the flow rate of fluid falls into a preset measurement interval; and S2, starting a rotary driving mechanism to drive the rotary sleeve integrated with the vortex generating body and the detection probe to rotate. And S3, identifying an azimuth angle corresponding to the maximum amplitude in the vibration signal, and driving the rotary sleeve to rotate to a target azimuth, so that the longitudinal direction of the vortex generating body is in the same direction as the maximum amplitude azimuth. And S4, monitoring non-vortex frequency disturbance suffered by the vortex generating body. The rotation driving mechanism is used for actively rotating the vortex generating body, so that the longitudinal direction of the vortex generating body is the same as the maximum vibration amplitude direction monitored in real time. The direct interference of pipeline vibration on the vortex generation stability is reduced.

Description

TECHNICAL FIELD

[0001] 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. BACKGROUND

[0002] The vortex flowmeter is a flow measurement instrument based on the Karman vortex principle, which calculates the flow rate by detecting the frequency of the vortex generated when the fluid flows through the non-streamline vortex generator. Its measurement accuracy is often severely disturbed by external mechanical vibration and fluid state changes (especially wide flow rate range).

[0003] To overcome the interference problem, existing research mainly falls into two aspects: First, adjust the flow passage cross section to improve the anti-vibration performance. Chinese invention patent CN202510041608.7 (an anti-vibration vortex flowmeter) proposes to replace the traditional vibration frequency detection with a differential pressure system composed of a detection pressure pipe and a balance pressure pipe to avoid the direct impact of vibration on the sensor signal. At the same time, by adjusting the deformable rubber ring to change the inlet flow area, it aims to improve the measurement signal strength at low flow rates. However, its differential pressure detection system structure is relatively complex; the adjustment of the flow rate depends on the deformation of the elastic body (rubber ring), which may destroy the stability of the flow field. More importantly, it cannot cope with directional pipe vibration, and the stability of the fixed vortex generator and the quality of vortex shedding will still decrease when it is continuously impacted in a certain direction, thereby affecting the measurement accuracy.

[0004] Second, build a physical isolation barrier and perform signal compensation. Chinese invention patent application CN202511697109.X (a vortex flowmeter with self-adaptive vibration suppression and a method) sets up a multi-stage vibration isolation structure including a vibration isolation pad and a damping device protection shell, and integrates a temperature sensor for real-time compensation to attenuate the influence of external vibration and temperature changes. Although its complex isolation layer can attenuate wideband vibration, it is difficult to completely block, especially for vibration with similar frequency to vortex frequency or strong directionality, the isolation effect is limited. SUMMARY

[0005] The present application is aimed at the defects existing in the prior art, and provides a self-adaptive anti-interference vortex flowmeter and a measurement method thereof.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions, a measurement method of a self-adaptive anti-interference vortex flowmeter, comprising the following steps: S1, switching the flow passage cross-sectional area by the multi-stage diameter switching ball valve on the inlet side and the outlet side of the flowmeter, so that the fluid flow rate falls into the preset measurement interval.

[0007] S2, start the rotary drive mechanism, drive the integrated vortex generator and detection probe rotation, and real-time acquisition of multi-azimuth pipeline vibration signal.

[0008] S3, identify the maximum amplitude of the vibration signal corresponding to the azimuth, drive the rotating sleeve to rotate to the target direction, so that the vortex generator is longitudinally aligned with the maximum amplitude direction, to reduce the influence of pipeline vibration on vortex generation state.

[0009] S4, monitor the non-vortex frequency disturbance of the vortex generator, generate resistance through the electromagnetic damping module arranged inside the vortex generator, and inhibit the displacement of the moving conductor in the non-working frequency band.

[0010] An adaptive anti-interference vortex flowmeter, comprising: A main housing.

[0011] A rotating sleeve rotatably mounted in the main housing, the rotating sleeve being provided with a vortex generator and a detection probe for detecting vortex signals.

[0012] A front variable diameter valve unit and a rear variable diameter valve unit are respectively arranged at both ends of the main housing, and each variable diameter valve unit comprises a plurality of step diameter switching ball valves.

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

[0014] Further, the rotary drive mechanism comprises a rotary motor mounted on the main housing, and the rotary motor drives the rotating sleeve to rotate through a small synchronous pulley, a belt and a large synchronous pulley.

[0015] Further, the vortex generator is provided with an active energy dissipation mechanism, the mechanism comprising a generator housing and a connecting body arranged inside the generator housing; the connecting body is connected with the rotating sleeve through a connecting rod; a guide column is fixedly installed on the inner wall of the generator housing and penetrates through a guide hole on the connecting body, so as to form a sliding guide fit between the generator housing and the connecting body; the two ends of the balance spring are connected to the corresponding connection points of the generator housing and the connecting body, so as to provide a centering reset force when the generator housing is deviated from the center by external vibration.

[0016] Further, the active energy dissipation mechanism further comprises an electromagnetic damping module composed of a moving conductor and a sealing coil; a through hole is formed in the connecting body, and the sealing coil is located in the through hole; the top of the moving conductor is fixed to the top wall of the generator housing, and the bottom of the moving conductor extends into the sealing coil; wherein, the generator housing moves along the guide column relative to the connecting body under the pipeline vibration, and the damping force of the balance spring and the electromagnetic damper is used to realize vibration reduction.

[0017] Further, the multi-stage pass switching ball valve is a three-layer nested structure, comprising a large-diameter ball, a medium-diameter ball and a small-diameter ball arranged in sequence from outside to inside, and a large-diameter transmission shaft, a medium-diameter transmission shaft and a small-diameter transmission shaft respectively fixedly connected with the three ball bodies and concentrically sleeved with each other; the corresponding ball body is driven to rotate independently by each transmission shaft, so as to realize switching of different hole diameter channels.

[0018] Further, the large-diameter ball, the medium-diameter ball and the small-diameter ball are all provided with a standard diameter through hole and a corresponding stepped through hole; the stepped through hole comprises a large-diameter hole, a medium-diameter hole and a small-diameter hole; by adjusting the relative rotation position of the three ball bodies, the stepped through hole of the target hole diameter is overlapped with the standard diameter through hole of the remaining ball bodies on the flow channel axis, so as to realize the stepped adjustment of the flow channel cross-sectional area.

[0019] That is, the large-diameter ball is provided with a through large-diameter hole; the medium-diameter ball is provided with a through medium-diameter hole; and the small-diameter ball is provided with a through small-diameter hole. And the three ball bodies are all provided with a corresponding standard diameter through hole, and the gear position switching of the flow channel pass is realized by adjusting the relative rotation position of the three ball bodies.

[0020] Further, each variable diameter valve unit further comprises a variable diameter control unit, the variable diameter control unit comprising a large-diameter control disc driven by a variable diameter motor, and a medium-diameter control disc and a small-diameter control disc coaxially arranged; The large-diameter control disc is provided with a first shift rod, and the first shift rod is matched with the 90° control groove on the medium-diameter control disc to realize the time delay linkage between the large-diameter ball and the medium-diameter ball. The medium-diameter control disc is provided with a second shift rod, and the second shift rod is matched with the 180° control groove on the small-diameter control disc to realize the time delay linkage between the medium-diameter ball and the small-diameter ball.

[0021] Further, the main shell is further provided with a detection sensor, which is an acceleration sensor, for acquiring 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, the rotating sleeve is driven to rotate until the longitudinal center plane of the vortex generating body coincides with the maximum amplitude direction, so as to minimize the influence of pipeline vibration on vortex stability.

[0022] Further, the converter controls the current applied to the sealing coil according to the relative displacement and speed fed back by the displacement detection element, so as to suppress the vibration of the generating body shell in the interference frequency band through the eddy current damping effect generated by the moving conductor.

[0023] Preferably, the main shell adopts a sealed structure; it comprises an overall cavity formed by the lower fixing part and the upper fixing part buckling connection; the upper fixing part top is sealed and buckled with a sealing cover, which completely encloses the rotary motor, sensor and electrical control circuit in the non-flow area of the main shell.

[0024] Compared with the prior art, the application has the following beneficial effects.

[0025] The application utilizes the rotary driving mechanism to actively rotate the vortex generator, so that the longitudinal direction of the vortex generator is the same as the direction of the maximum vibration amplitude monitored in real time. The core sensitive element (vortex generator) is aligned in the direction with the minimum influence of vibration, so that the direct interference of pipeline vibration on vortex generation stability is reduced. Meanwhile, the active energy dissipation mechanism composed of an electromagnetic damping module is integrated in the vortex generator. When the generator shell is affected by external vibration, the mechanism can provide a reset force through a balance spring and generate a resistance opposite to the disturbance vibration speed through electromagnetic damping, so as to actively suppress the vibration displacement in the non-working frequency band.

[0026] The application realizes accurate and staged adjustment of the flow passage area by using the multi-stage pass diameter switching ball valve, can automatically switch to the optimal flow measurement interval according to the actual flow rate, and the time delay linkage mechanism of the variable diameter control unit enables complex adaptive adjustment to be realized through a compact and reliable structure. BRIEF DESCRIPTION OF DRAWINGS

[0027] The application will be further described below in combination with the drawings and specific embodiments. The protection scope of the application is not limited to the following descriptions.

[0028] Figure 1 It is a front view of the anti-interference vortex street flowmeter and measurement method.

[0029] Figure 2 It is a sectional view of the anti-interference vortex street flowmeter and measurement method.

[0030] Figure 3 It is a sectional view of the variable diameter valve unit of the anti-interference vortex street flowmeter and measurement method.

[0031] Figure 4 It is a three-dimensional view of the variable diameter ball of the anti-interference vortex street flowmeter and measurement method.

[0032] Figure 5 It is a front view of the variable diameter ball of the anti-interference vortex street flowmeter and measurement method.

[0033] Figure 6 It is a sectional view of the variable diameter ball of the anti-interference vortex street flowmeter and measurement method.

[0034] Figure 7 It is an assembly schematic view of the single variable diameter ball of the anti-interference vortex street flowmeter and measurement method.

[0035] Figure 8 Figure 1 is a front view of a variable-diameter control unit for an anti-interference vortex flowmeter and measurement method.

[0036] Figure 9 Figure 2 is a sectional view of a variable-diameter control unit for an anti-interference vortex flowmeter and measurement method.

[0037] Figure 10 Figure 3 is a three-dimensional view of a control panel for an anti-interference vortex flowmeter and measurement method. Figure 1 .

[0038] Figure 11 Figure 4 is a three-dimensional view of a control panel for an anti-interference vortex flowmeter and measurement method. Figure 2 .

[0039] Figure 12 Figure 5 is a three-dimensional view of a rotary body unit for an anti-interference vortex flowmeter and measurement method.

[0040] Figure 13 Figure 6 is a three-dimensional view of a rotary sleeve for an anti-interference vortex flowmeter and measurement method.

[0041] Figure 14 Figure 7 is a sectional view of a rotary sleeve for an anti-interference vortex flowmeter and measurement method.

[0042] Figure 15 Figure 8 is a sectional view of a vortex generator for an anti-interference vortex flowmeter and measurement method. Figure 1 .

[0043] Figure 16 Figure 9 is a sectional view of a vortex generator for an anti-interference vortex flowmeter and measurement method. Figure 2 .

[0044] In the figure, 1 is a main housing, 2 is a rotary body unit, 3 is a vortex generator, 4 is a detection unit, 5 is a front variable-diameter valve unit, 6 is a front variable-diameter control unit, 7 is a rear variable-diameter valve unit, 8 is a rear variable-diameter control unit; 101 is a lower fixing member, 102 is an upper fixing member, 103 is a sealing cover, 104 is a front connecting pipe, 105 is a rear connecting pipe; 201 is a rotary sleeve, 202 is a rotary motor, 203 is a small synchronous pulley, 204 is a belt, 205 is a large synchronous pulley, 206 is a generator mounting hole, 207 is a detection probe mounting hole, 208 is a connecting column, 209 is a sealing groove, 210 is a sliding bearing groove; 301 is a generator housing, 302 is a guide column, 303 is a balance tension spring, 304 is a moving conductor, 305 is a connecting body, 306 is a sealing coil, 307 is a connecting rod; 401 is a detection probe, 402 is a detection sensor, 404 is a transducer; 501, valve shell; 502, sealing ring; 503, flange; 504, pipeline cavity; 505, upper flange; 506, multi-stage passageway switching ball valve; 5061, large-diameter ball; 5062, medium-diameter ball; 5063, small-diameter ball; 5064, large-diameter transmission shaft; 5065, medium-diameter transmission shaft; 5066, small-diameter transmission shaft; 5067, large-diameter hole; 5068, medium-diameter hole; 5069, small-diameter hole; 50610, mounting hole; 50611, standard-diameter through hole; 601, transmission shaft shell; 602, upper cover shell; 603, variable-diameter motor; 604, gear; 605, end cover; 607, small-diameter control disc; 608, medium-diameter control disc; 609, large-diameter control disc; 610, small-diameter primary transmission shaft; 611, medium-diameter primary transmission shaft; 612, large-diameter primary transmission shaft; 613, medium-diameter secondary gear shaft; 614, large-diameter secondary gear shaft; 615, first shifting lever; 616, second shifting lever; 617, 90° control groove; 618, 180° control groove. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0046] The terms used in the embodiments of the present disclosure are merely for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "an" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0047] Depending on the context, the words "if' "when" and the like as used herein can be interpreted to mean "upon determining" or "in response to determining" or "in response to detecting".

[0048] For the convenience of understanding, the embodiments of the present disclosure will be described in detail.

[0049] As shown in the figure, embodiment one: an adaptive anti-interference vortex flowmeter, the overall structure is composed of a main shell 1, a rotating body unit 2, a vortex generating body 3, a detection unit 4, a front variable-diameter valve unit 5, a rear variable-diameter valve unit 7, and a corresponding control unit. Figures 1-16

[0050] ​The main housing 1 is the carrier and sealing shell of the whole flowmeter, which is divided into two parts for easy assembly. Specifically, the lower fixing part 101 and the upper fixing part 102 are connected by bolt fastening to form a hollow chamber. The middle part of the chamber is the flow area through which the fluid passes, and the front and rear ends of the chamber are connected to the front connector 104 and the rear connector 105 respectively for connecting to the pipeline. The upper part of the chamber is the non-flow area for accommodating the driving and sensing components. The top of the upper fixing part 102 is sealed and fastened to a sealing cover 103 by a flange or a clamping groove to completely seal the upper area. The sealing cover has a wire hole or a mounting seat reserved for leading out the cable or mounting the converter 404.

[0051] The rotary sleeve 201 is a cylindrical rotatable component supported by sliding bearings at both ends in the center of the flow area of the main housing 1. The inner wall of the rotary sleeve 201 is provided with a sliding bearing groove 210 at both ends for installing sliding bearings to support the whole rotary sleeve 201. The outer side of the end of the rotary sleeve 201 is coaxially fixed with a connecting column 208, and the connecting column 208 is provided with a large synchronous pulley 205. The middle part of the cylindrical wall of the rotary sleeve 201 is provided with a vortex generator mounting hole 206 and one or more detection probe mounting holes 207 in the radial direction. They are used to install the vortex generator 3 and the detection probe 401 respectively.

[0052] As a preferred solution, an annular sealing groove 209 is provided at the end face of the rotary sleeve 201 and the front and rear connectors for sealing the connected pipeline during the rotation of the rotary sleeve to prevent liquid and gas leakage.

[0053] The variable diameter valve unit includes a front variable diameter valve unit 5 arranged at the inlet side of the flowmeter and a rear variable diameter valve unit 7 arranged at the outlet side. Each unit includes a multi-stage diameter switching ball valve 506 installed in the cavity of the valve shell 501. The left and right ends of the valve shell 501 are provided with flanges 503 for connecting to the pipeline. The inside of the valve shell 501 forms a pipeline cavity 504, which is connected to the left and right flanges 503 for fluid flow. The upper end of the valve shell 501 is provided with an upper flange 505 for installing the variable diameter control unit.

[0054] II. In the rotary drive mechanism, there are two rotary motors 202, and each rotary motor 202 is installed on the outer top wall of the upper fixing part 102, and the output shaft end of each rotary motor 202 is provided with a small synchronous pulley 203. On the left and right outer walls of the rotary sleeve 201, two large synchronous pulleys 205 are coaxially fixed by connecting columns 208. A closed belt 204 is wound around the same side small synchronous pulley 203 and large synchronous pulley 205 to form a synchronous belt transmission pair. When the rotary motor 202 starts, the power is transmitted to the large synchronous pulley 205 through the small synchronous pulley 203 and the belt 204, thereby driving the rotary sleeve 201 to rotate.

[0055] III. The active energy dissipation mechanism arranged inside the vortex generator 3: The vortex generator 3 is fixed on the rotary sleeve 201 through a connecting rod 307, and the connecting rod 307 is a hollow pipe structure, and the inside of the connecting rod 307 is used for wiring. When installed, the end of the connecting rod 307 slightly protrudes from the generator mounting hole 206 or the ends are flush, to facilitate wiring. Moreover, the length of the generator cable should be sufficient or have a certain margin when the rotary sleeve 201 rotates by 90 degrees.

[0056] The generator shell 301 is a hollow structure with a section in the shape of a Chinese character, and two parallel guide columns 302 are arranged in the hollow structure; a connecting body 305 is slidably connected to the guide columns 302 in the hollow structure, and the connecting body 305 is provided with guide holes matched with the guide columns 302, and the two guide columns 302 pass through the corresponding guide holes respectively, forming a sliding fit.

[0057] Specifically, the connecting body 305 is connected to the rotary sleeve 201 through the connecting rod 307, and corresponding balance spring connection points are respectively arranged on the inner top wall and the inner bottom wall of the generator shell 301, and on the upper and lower end faces of the connecting body 305; the two ends of the two balance springs 303 are respectively hooked or screwed between the corresponding connection points, forming a symmetrically arranged reset spring system. When external vibration causes the generator shell 301 to deviate from the center position, the balance spring 303 is stretched or compressed, generating an elastic restoring force pointing to the center, forcing the generator shell 301 to return to the initial equilibrium position.

[0058] Further, the active energy dissipation mechanism is also provided with an electromagnetic damping module: a cylindrical mounting hole is vertically provided on the connecting body 305, and a cylindrical sealing coil 306 is interference-fitted or glued and fixed in the hole, and the inside of the coil is a hollow passage; a cylindrical moving conductor 304 is coaxially inserted into the hollow passage, one end of the moving conductor 304 is fixed to the inner wall of the generator shell 301, and the other end is freely suspended in the coil, and a small gap is left between the two to allow relative movement. Thus, the moving conductor 304 and the sealing coil 306 together form a linear electromagnetic damper.

[0059] Preferably, the moving conductor 304 is made of copper or aluminum, and in addition, the generator or rotary body unit 2 is provided with a displacement monitoring element, which is signal connected with the transducer 404; the displacement monitoring element is used to collect the displacement of the moving conductor 304 relative to the sealing coil 306; and feedback to the control module in the transducer 404. It obtains real-time speed information by differentiating the displacement signal, and calculates the optimal braking current value accordingly; the 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 with the pipe vibration, it induces eddy current inside, which interacts with the controlled magnetic field to generate electromagnetic damping force (Ampere force) always opposite to the direction of motion; this damping force cooperates with the restoring force of the balance spring 303 to quickly convert the vibration energy generated by the body shell 301 into heat energy and dissipate; so as to quickly suppress mechanical disturbance in the non-working interference frequency band (such as the inherent frequency range of the pipe), realize the braking and stationary state of the body relative to the connecting body 305, and ensure that the flowmeter only responds to the vortex signal excited by the fluid.

[0061] In summary, the realization of anti-interference measurement in vortex body 3: When the pipe produces vibration, the vibration is transmitted to the connecting body 305 through the rotating sleeve 201 and the connecting rod 307. Due to inertia, the body shell 301 will produce off-center displacement and relative speed relative to the connecting body 305 along the guide column 302.

[0062] At this time, the balance spring 303 is stretched or compressed, and the restoring force acts on the body shell 301 to try to pull it back to the central equilibrium position.

[0063] The controller (which can be integrated into the converter, which is respectively electrically connected with the detection sensor 402, the rotating motor 202 and the sealing coil 306;) reads the displacement and speed 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 the changing magnetic field and generates induced eddy current, thereby generating electromagnetic damping force opposite to the direction of motion. In the process of mutual conversion of the potential energy of the spring and the kinetic energy of the moving conductor, the electromagnetic damper continuously converts the kinetic energy into heat and dissipates it. Under the cooperation of the restoring force and the damping force, the body shell 301 can eliminate the vibration effect along the fastest path and quickly return to the stationary state, thereby ensuring the accuracy of vortex street signal detection.

[0064] IV. The front and rear variable diameter valve units have the same structure, and each of the two variable diameter valve units is connected in series on both sides of the main housing 1, and each of the two variable diameter valve units comprises a valve housing 501 and a multi-stage variable diameter switching ball valve 506. The assembly structure comprises: the valve housing 501 is connected to the measurement pipeline through the flanges 503 on the left and right ends, and forms a pipeline cavity 504 for fluid flow inside; the multi-stage variable diameter switching ball valve 506 is installed inside the valve housing 501, and sealing rings 502 are arranged on both sides of the ball valve to ensure that the fluid does not leak. The multi-stage variable diameter switching ball valve 506 adopts a three-layer concentric nested structure (more layers can be arranged 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. The three are hollow balls processed with high precision, and can rotate relative to each other through spherical surface matching. The top center of the large-diameter ball 5061 is fixedly connected with a large-diameter transmission shaft 5064, the top of the medium-diameter ball 5062 is fixedly connected with a medium-diameter transmission shaft 5065, and the top of the small-diameter ball 5063 is fixedly connected with a small-diameter transmission shaft 5066; the three transmission shafts are coaxially sleeved, wherein the small-diameter transmission shaft 5066 penetrates the center hole of the medium-diameter transmission shaft 5065, and the medium-diameter transmission shaft 5065 penetrates the center hole of the large-diameter transmission shaft 5064, forming a three-stage coaxial transmission structure. Each ball body is connected by two hemispheres through screws in a plurality of mounting holes 50610 distributed along the equatorial plane, which facilitates assembly and maintenance. By independently driving the rotation of each transmission shaft, the corresponding ball body can be driven to rotate around the flow channel axis, thereby switching the combination of flow channels with different diameters. Meanwhile, a friction sealing ring is arranged on the transmission shaft of each layer of balls to increase the starting resistance of the transmission shaft, which can effectively prevent the rotation of adjacent balls during the rotation of each layer of balls.

[0065] In addition, the three-layer ball body is provided with a left-right direction standard diameter through hole 50611, i.e. an A diameter through hole, which is used to ensure the basic flow capacity. That is, the large-diameter ball 5061, the medium-diameter ball 5062 and the small-diameter ball 5063 are respectively provided with B diameter, C diameter and D diameter through holes, and the B diameter is greater than the C diameter, and the C diameter is greater than the D diameter; and each sub-stage through hole is arranged along the front and back direction of the corresponding ball body. When all the A diameter through holes are aligned with the pipeline, it is a full-open standard pipe diameter. It should be noted that the standard diameter through hole 50611 and the sub-stage through holes 5067, 5068 and 5069 arranged on the large-diameter ball 5061, the medium-diameter ball 5062 and the small-diameter ball 5063 are through holes along the diameter direction of the ball body, which ensures that the fluid can pass through without obstruction when rotated to the aligned position.

[0066] When it is needed to switch to a certain gear (such as small diameter), the three-layer ball is rotated to a certain angle, so that the target gear's stepped through hole (for example, small diameter hole 5069) is completely coincident with the marked diameter through hole 50611 on the other two layers of balls on the flow channel axis, forming a continuous minimum flow channel; similarly, if a medium diameter is needed, the medium diameter hole 5068 is aligned with the marked diameter through holes on the large and small balls; if the maximum diameter is needed, only the marked diameter through holes 50611 on all balls are aligned. This design realizes multi-stage discrete adjustment of the flow channel cross-sectional area. Among them, the marked diameter through hole is a hole with the same diameter.

[0067] The specific variable diameter control process is as follows: from the marked diameter port to the B diameter control process: The variable diameter motor 603 drives the large diameter control disc 609 to rotate counterclockwise by 90° (the medium diameter control disc 608 and the small diameter control disc 607 are not moved), and the B diameter port becomes the liquid flow through port.

[0068] From the marked diameter port to the C diameter control process: The variable diameter motor 603 drives the large diameter control disc 609 to continue counterclockwise rotation by 90 degrees (counted from the start as 180°), and the large diameter control disc 609 rotates while the first lever 615 is in the 90° control groove 617. The medium diameter control disc 608 is rotated by 90°, (the small diameter control disc 607 is not moved), and the C diameter port becomes the liquid flow through port.

[0069] From the marked diameter port to the D diameter control process: The variable diameter motor 603 drives the large diameter control disc 609 to continue counterclockwise rotation by 180 degrees (counted from the start as 360), and the large diameter control disc 609 rotates while the first lever 615 is in the 90° control groove 617. The medium diameter control disc 608 is rotated by 180° (counted from the start as 270°), and the medium diameter control disc 608 rotates while the second lever 616 is in the 180° control groove 618. The small diameter control disc 607 is rotated by 90°. The C diameter port becomes the liquid flow through port.

[0070] The above is the variable diameter control process. If the variable diameter is completed and it is needed to restore to the marked diameter port, the clockwise rotation is reset (initial state) according to the rotation angle of each control disc, and then the above action is repeated.

[0071] Five, the variable diameter control unit 6 matched with each variable diameter valve unit is specifically structured and assembled as follows: The variable diameter control unit 6 includes a transmission shaft shell 601 connected to the flange 505 on the valve shell 501 through bolts, and an upper cover shell 602 is buckled to the upper end of the transmission shaft shell 601 to form a closed inner cavity.

[0072] The small-diameter transmission shaft 5066 extends upward and is fixed with the small-diameter first transmission shaft 610 through a key groove or spline; the medium-diameter transmission shaft 5065 is fixed with the medium-diameter first transmission shaft 611, which is integrally formed with the medium-diameter second gear shaft 613; and the large-diameter transmission shaft 5064 is fixed with the large-diameter first transmission shaft 612, which is integrally formed with the large-diameter second gear shaft 614.

[0073] At the end of the transmission shaft, the small-diameter first transmission shaft 610 is fixed with the small-diameter control disc 607, the medium-diameter first transmission shaft 611 is fixed with the medium-diameter control disc 608, and the large-diameter first transmission shaft 612 is fixed with the large-diameter control disc 609.

[0074] The variable-diameter motor 603 is installed at the top of the upper cover 602, and its output shaft penetrates the end cover 605 downward and is provided with the gear 604 at the shaft end; the gear 604 is engaged with the tooth surface on the outer periphery of the large-diameter control disc 609. The first lever 615 is fixed on the upper surface of the large-diameter control disc 609 near the edge, and one end of the lever 615 extends into the 90° control groove 617 on the medium-diameter control disc 608; when the medium-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 medium-diameter control disc 608 to start rotating. Similarly, the second lever 616 is fixed on the upper surface of the medium-diameter control disc 608, and one end of the lever 616 extends into the 180° control groove 618 on the small-diameter control disc 607, thereby realizing the time-delay linkage between the medium-diameter ball and the small-diameter ball. The mechanical linkage mechanism ensures that the three-stage ball valve acts in the preset order, avoiding the misalignment or jamming of the flow passage.

[0075] It should be noted that, in the present application, the standard-diameter port (A-diameter through hole) corresponds to the original diameter of the pipeline. When the fluid is in the normal working condition (optimal flow rate range), a channel completely matching and without diameter reduction is provided to reduce the pressure loss and ensure the reference measurement accuracy of the flowmeter. Without intervention, the standard-diameter ports of the three-layer balls remain aligned, so that the flowmeter operates as a standard device, ensuring the compatibility of the pipeline.

[0076] The standard-diameter port is the zero position of the variable-diameter logic. Switching from the standard-diameter port to the variable-diameter ports (B, C, D-diameter) is based on the central-symmetry change of the hole diameter, which can better ensure the uniformity of the flow rate distribution than the irregular shape formed by simply misaligning the standard-diameter port, thereby ensuring the measurement accuracy. Through the rotation angle combination of the control disc set, the selected variable-diameter port is aligned with the center of the pipeline.

[0077] The control logic is as follows: When the flow rate is too slow, resulting in a weak signal or a signal drowned by noise, the ball valve is driven to switch to a smaller hole diameter step by step to amplify the vortex energy.

[0078] When the flow rate is too high, resulting in a decrease in accuracy or a positive deviation, the motor drives the ball valve to switch back to a larger hole diameter, so that the flow rate returns to a reasonable range.

[0079] Six, the detection sensor 402 installed on the main housing 1 is specifically a three-axis acceleration sensor, which is fixed on the upper fixing member 102 by screws, and the sensitive axis direction covers multiple directions around the pipeline. The sensor 402 collects the vibration acceleration signals of the pipeline in the X, Y and Z three orthogonal directions in real time, and transmits the data to the converter 404. The converter 404 is built-in signal processing module, which performs frequency spectrum analysis and amplitude comparison on the vibration signals in each direction, and identifies the direction angle with the maximum vibration energy (i.e. the maximum amplitude). Subsequently, the control system sends instructions to drive the rotary motor 202 to rotate the rotary sleeve 201 until the longitudinal center plane (i.e. the normal direction of the incident plane) of the vortex generator 3 coincides with the maximum amplitude direction. In this attitude, the transverse disturbance caused by the pipeline vibration has the least influence on the symmetry of vortex shedding.

[0080] Working process: 1. Connect the vortex flowmeter to the measurement pipeline system.

[0081] 2. Continuously monitor the vortex signal frequency and determine whether the flow rate is in the preset optimal measurement interval: If the flow rate is below the lower threshold, the vortex signal is weak or cannot be stably generated, at this time the variable diameter control unit 6 drives the multi-stage diameter switching ball valve 506 to reduce the flow passage cross-sectional area, so that the flow rate is increased to the effective detection range; If the flow rate is higher than the upper threshold, then adjust in the opposite direction, expand the flow passage cross-sectional area, so that the flow rate falls back to a reasonable interval, thereby providing stable and suitable flow rate conditions for vortex detection.

[0082] 3. The acceleration sensor 402 installed on the main housing 1 collects the vibration signals of the pipeline in each direction in real time. The converter 404 analyzes the signals and identifies the orientation angle corresponding to the maximum amplitude. Then control the rotary drive mechanism (such as the rotary motor 202) 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 direction, so as to reduce the influence of pipeline vibration on the stability of vortex shedding.

[0083] 4. The pipeline vibration is transmitted to the connecting body 305 inside the vortex generator 3 through the rotary sleeve 201 and the connecting rod 307, causing the generator housing 301 to move relative to the connecting body 305 along the guide column 302: The symmetrically arranged balance spring 303 provides restoring force to promote the generator housing 301 to the central position; The displacement detection element monitors the displacement and speed of the moving conductor 304 relative to the sealed coil 306 in real time, and feeds back to the converter 404. The converter calculates and outputs the control current to the sealed coil 306 according to the motion state, so that the moving conductor 304 generates eddy current damping force when moving in the magnetic field. The direction of the force is always opposite to the vibration speed, which realizes active suppression of vibration; Under the synergistic effect of spring restoring force and electromagnetic damping force, the vibration energy of the body shell 301 is quickly converted into heat energy dissipation, so that it quickly returns to the static state, ensuring that the vortex street signal detection is not disturbed by mechanical vibration.

[0084] 5. After the above adjustment is completed, the flow meter enters a high-precision measurement state. The system continuously monitors the working condition changes, and automatically repeats steps 2 to 4 when the flow rate or vibration characteristics exceed the set threshold, achieving adaptive anti-interference operation at all times.

[0085] It can be understood that the above specific description of the present application is only used to illustrate the present application and is not limited to the technical solutions described in the embodiments of the present application. Those skilled in the art should understand that the present application can still be modified or replaced equivalently to achieve the same technical effect; as long as the use needs are met, it is within the protection scope of the present application.

Claims

1. A method of measuring a self-adapting anti-interference vortex flowmeter, characterized in that, The method comprises the steps of: S1, switching the flow passage area by the multi-stage pass switching ball valve on the inlet side and the outlet side of the flowmeter, so that the fluid flow rate falls into a preset measurement interval; S2, starting the rotary drive mechanism to drive the rotary sleeve integrated with the vortex generator and the detection probe to rotate and collect multi-directional pipeline vibration signals in real time; S3, identifying the azimuth angle corresponding to the maximum amplitude in the vibration signal, driving the rotary sleeve to rotate to the target direction, so that the vortex generator is longitudinally aligned with the maximum amplitude direction, thereby reducing the influence of pipeline vibration on vortex generation state; S4, monitoring the non-vortex frequency disturbance received by the vortex generator, generating resistance through the electromagnetic damping module arranged inside the vortex generator, and inhibiting the displacement of the moving conductor in the non-working frequency band.

2. An adaptive anti-interference vortex flowmeter characterized by, It comprises: a main shell (1); a rotary sleeve (201) rotatably mounted in the main shell (1), the rotary sleeve (201) being provided with a vortex generator (3) and a detection probe (401) for detecting vortex signals; a front variable diameter valve unit (5) and a rear variable diameter valve unit (7) arranged at both ends of the main shell (1) respectively, each variable diameter valve unit comprising a multi-stage pass switching ball valve (506); a converter (404) electrically connected with the detection probe (401), the rotary drive mechanism and the variable diameter valve unit.

3. The vortex flowmeter of claim 2, wherein, The rotary drive mechanism comprises a rotary motor (202) mounted on the main shell (1), the rotary motor (202) driving the rotary sleeve (201) to rotate through a small synchronous pulley (203), a belt (204) and a large synchronous pulley (205).

4. The vortex flowmeter of claim 2, wherein, The vortex generator (3) is provided with a positive energy dissipation mechanism, the mechanism comprising a generator shell (301) and a connecting body (305) arranged inside the generator shell (301); the connecting body (305) is connected with the rotary sleeve (201) through a connecting rod (307); a guide column (302) is fixedly installed on the inner wall of the generator shell (301) and penetrates through a guide hole on the connecting body (305), so as to form a sliding guide fit between the generator shell (301) and the connecting body (305); the two ends of a balance tension spring (303) are connected to the corresponding connection points of the generator shell (301) and the connecting body (305), respectively, so as to provide a centering restoring force when the generator shell (301) is deviated from the center by external vibration.

5. The vortex flowmeter of claim 4 wherein, The positive energy dissipation mechanism further comprises an electromagnetic damping module composed of a moving conductor (304) and a sealing coil (306); a through hole is formed in 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 top wall of the generator shell (301), and the bottom of the moving conductor (304) extends into the sealing coil (306); wherein the generator shell (301) moves along the guide column (302) relative to the connecting body (305) under pipeline vibration, and vibration reduction is realized through the damping force of the balance tension spring (303) and the electromagnetic damper.

6. The vortex flowmeter of claim 2, wherein, The multi-stage pass switching ball valve (506) is a three-layer nested structure, including a large-diameter ball (5061), a medium-diameter ball (5062) and a small-diameter ball (5063) which are arranged in concentric from outside to inside, and a large-diameter transmission shaft (5064), a medium-diameter transmission shaft (5065) and a small-diameter transmission shaft (5066) which are respectively fixedly connected with the three ball bodies and are in mutual concentric sleeve fitting; the corresponding ball bodies are independently rotated by the transmission shafts to realize switching of different hole diameter channels.

7. The vortex flowmeter of claim 6 wherein, The large-diameter ball (5061), the medium-diameter ball (5062) and the small-diameter ball (5063) are all provided with a standard diameter through hole and a corresponding graded through hole; the graded through hole includes a large-diameter hole (5067), a medium-diameter hole (5068) and a small-diameter hole (5069); by adjusting the relative rotation positions of the three-layer ball bodies, the graded through hole of the target hole diameter is coincided with the standard diameter through hole of the remaining ball bodies on the flow channel axis, so that the graded adjustment of the flow channel cross-sectional area is realized.

8. The vortex flowmeter of claim 6 wherein, Each variable diameter valve unit further comprises a variable diameter control unit (6), the variable diameter control unit (6) comprises 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 shift rod (615), and the first shift rod (615) is matched with a 90° control groove (617) on the medium-diameter control disc (608) to realize the time delay linkage between the large-diameter ball and the medium-diameter ball; The medium-diameter control disc (608) is provided with a second shift rod (616), and the second shift rod (616) is matched with a 180° control groove (618) on the small-diameter control disc (607) to realize the time delay linkage between the medium-diameter ball and the small-diameter ball.

9. The vortex flowmeter of claim 2, wherein, The main shell (1) is further provided with a detection sensor (402), which is an acceleration sensor for acquiring 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, the rotating sleeve (201) is driven to rotate, until the longitudinal center plane of the vortex generator (3) coincides with the maximum amplitude direction, so that the influence of pipeline vibration on vortex stability is minimized.

10. The vortex flowmeter of claim 5, wherein, The converter (404) controls the current applied to the sealing coil (306) according to the relative displacement and speed fed back by the displacement detection element, so as to inhibit the vibration of the generator shell (301) in the interference frequency band through the eddy current damping effect generated by the moving conductor (304).

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