A spin vortex electromagnetic flowmeter

Abstract

This invention provides a vortex electromagnetic flowmeter, relating to the field of electromagnetic flowmeter technology. It includes a flowmeter housing, a detection element fixedly mounted on the upper end of the housing, a conversion display fixedly mounted on the upper end of the detection element, a rectifier inside the discharge end of the housing, and a threaded groove at the inlet end of the housing. A first threaded ring is threadedly installed inside the groove, and supports are fixedly mounted at equal intervals on the inner wall of the first threaded ring. A guide rod is fixedly mounted on the side wall of each support, and a central column is fixedly mounted on the opposite end of each support. The central columns are conical and distributed from coarse to fine along the water flow direction of the flowmeter housing. This device can avoid local high-pressure or low-pressure areas caused by sudden changes in flow velocity, reduce energy loss (such as vortex dissipation), reduce impact wear on the inner wall of the flowmeter, enhance vortex stability, suppress interference from bubbles in metering, and improve crude oil metering accuracy and equipment reliability.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic flowmeter technology, and more specifically, relates to a vortex electromagnetic flowmeter. Background Technology

[0002] A vortex flow meter is a flow measurement instrument based on the principle of fluid vibration. It is mainly used for monitoring the volume and mass flow of gas, steam or liquid. It is widely used in industries such as petroleum, chemical, natural gas transportation and power. Its working principle involves the Karman vortex street effect or vortex precession frequency detection. The flow rate is calculated by measuring the vortex frequency generated by the fluid passing through a specific structure.

[0003] However, existing vortex electromagnetic flowmeters typically have the following shortcomings when used to measure crude oil: 1. Crude oil transportation process is prone to air bubbles. Due to their low density, air bubbles tend to rise and aggregate. However, existing vortex electromagnetic flowmeters lack a dedicated structure for bubble diversion and breaking. Air bubbles will enter the measurement area with the vortex, disrupting the regularity of the vortex train. This results in a long disconnection time of the vortex signal and a significant increase in flow measurement error. 2. When crude oil enters the flow meter, the fluid tends to diffuse excessively near the inlet, forming a dispersed flow field. When this dispersed flow field enters the vortex generator, it will cause uneven force on the blades, reduce rotational stability, and consequently cause large fluctuations in the spiral radius of the generated vortex and distortion of the frequency signal. 3. When bubbles in crude oil enter the vortex generator with the flow field, the centrifugal pull generated by the circular motion cannot be canceled, which causes the central axis of the vortex to easily shift, and the vortex shape changes from a regular spiral to an irregular oscillation, resulting in poor stability of the vortex signal. 4. Crude oil contains impurities that require filtration. However, most existing vortex electromagnetic flowmeters use flat-plate filters. These filters are perpendicular to the fluid flow direction, and when crude oil impacts the filter surface, turbulence and eddies are easily formed. The low-pressure area at the center of the eddy will entrain air, forming a large number of bubbles. These bubbles enter the downstream vortex zone with the fluid, directly interfering with the stability of the vortex. Furthermore, the effective filtration area of ​​the flat-plate filter is limited, and the mesh edges are mostly right angles. When crude oil flows through, it is easy to form local vortices due to collisions. This not only reduces the crude oil throughput but also causes the intercepted impurities to be re-entrained into the mainstream by the vortex, resulting in poor filtration. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a vortex electromagnetic flowmeter to solve the problems of existing vortex electromagnetic flowmeters where the inlet fluid tends to diffuse excessively when processing crude oil, forming a dispersed flow field, and lacking a structure to guide and break up bubbles and counteract the centrifugal pull of bubbles, resulting in bubbles and impurities interfering with the stability of the vortex column, ultimately causing a significant increase in flow measurement error.

[0005] A vortex electromagnetic flowmeter includes a flowmeter housing, a detection element fixedly mounted on the upper end of the flowmeter housing, a conversion display fixedly mounted on the upper end of the detection element, a rectifier disposed inside the discharge end of the flowmeter housing, a threaded groove formed at the inlet end of the flowmeter housing, a first threaded ring threadedly mounted inside the threaded groove, brackets fixedly mounted at equal intervals on the inner wall of the first threaded ring, a guide rod fixedly mounted on the side wall of each bracket, a central column fixedly mounted on the opposite end of each bracket, the central column being conical and distributed from coarse to fine along the water flow direction of the flowmeter housing, axial microchannels uniformly and equidistantly formed on the surface of the central column, a vortex generator rotatably mounted on one end of the central column, and breaking teeth uniformly and equidistantly arranged on the blades of the vortex generator.

[0006] Preferably, a collar is fixedly installed on the side wall of the first threaded ring, and symmetrical limit grooves are formed on the side wall of the collar.

[0007] Preferably, a second threaded ring is threaded onto the collar, and a guide ring is fixedly installed in the inner wall of the collar.

[0008] Preferably, a collection box is fixedly installed inside the flow guide ring, and the collection box is located on the upper part of the inner wall of the flow meter housing.

[0009] Preferably, the collection box has a communication opening inside, and the communication opening is flush with the lower end of the inner wall of the collection box.

[0010] Preferably, mounting strips are fixedly installed at equal intervals on the inner wall of the collection box, and a crushing head is fixedly installed on each of the mounting strips.

[0011] Preferably, a filter screen is provided inside the collar, and mounting blocks are symmetrically fixedly installed on the side wall of the filter screen, with the two mounting blocks slidably installed in two limiting grooves respectively.

[0012] Preferably, the filter screen has mesh openings evenly spaced, each mesh opening has rounded corners, and spring pieces are fixedly installed at equal intervals on the side wall of the filter screen, with three spring pieces distributed in an isosceles triangle on the upper part of the filter screen.

[0013] Preferably, a material collecting strip is fixedly installed on the side wall of the filter screen, and an arc-shaped strip is fixedly installed in the inner wall of the material collecting strip, with an arc-shaped groove inside the arc-shaped strip.

[0014] Preferably, an arc-shaped slider is slidably installed inside the arc-shaped groove, and a scraper is fixedly installed on the arc-shaped slider. The scraper is slidably installed between the collecting strip and the arc-shaped strip.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the filter screen is designed in an arc shape, so the crude oil slides along the filter screen, the water flow direction changes gently, and almost no eddies or bubbles are generated. Compared with the existing flat plate filter screen, not only are fewer bubbles generated, but the filtration area of ​​the arc surface is also effectively increased, resulting in a higher crude oil throughput. Furthermore, the rounded corners on the mesh make the crude oil slide like it is on a smooth pebble, making it less likely to collide and form vortices, thus greatly reducing the probability of bubble formation. When the vortex generator rotates, it will cause the crude oil to fluctuate slightly. At this time, the spring sheet designed on the filter screen will shake accordingly, and the filter screen will vibrate slightly. At this time, the small bubbles and impurities attached to the filter screen will be shaken off. The three factors work together to achieve the effect of preventing foaming. In this invention, after the equipment is used regularly, an arc-shaped slider can slide inside the arc-shaped groove. The movement of the arc-shaped slider will drive the scraper to slide between the collecting bar and the arc-shaped bar, thereby pushing the impurities collected inside the collecting bar. When the scraper separates from the collecting bar, the impurities on the scraper can be cleaned. This design reduces the escape rate of impurities when collecting impurities and prevents impurities from falling back into the equipment during cleaning, resulting in a more thorough cleaning. In this invention, after the crude oil is filtered, it impacts the guide ring. At this time, the guide ring initially guides the flow, allowing it to impact the central column and preventing diffusion. Since the density of bubbles in crude oil is low, they tend to rise. The bubbles will then enter the collection box with the flow of crude oil. The bubbles at the top will be punctured by the crushing head on the mounting strip, and the crude oil that has entered the collection box will be discharged through the connecting port. By utilizing the velocity difference of the crude oil during its flow and the buoyancy of the bubbles, the bubbles that interfere with the swirling flow are "actively guided" out of the core area. The swirling flow signal disconnection time is reduced from - seconds to less than . seconds, without affecting the stability of the water flow entering the threaded groove. In this invention, the central column is designed in a conical shape and distributed from coarse to fine along the water flow direction of the flowmeter housing. This design can "initially converge" the water flow that just enters the flowmeter housing, guiding the dispersed water flow to the central area (near the threaded groove blades) and preventing excessive diffusion of crude oil near the inlet. As the flow transitions to the outlet (fine end), the gradual slope of the conical surface guides the water flow smoothly along the surface of the central column, reducing "impact turbulence" when the water flows around it. Ultimately, when the water enters the threaded groove blades, the flow velocity direction is more consistent, providing a uniform impact foundation for the stable rotation of the blades and reducing vortex frequency fluctuations caused by water flow turbulence. Furthermore, because the central column is thicker at the inlet, the flow channel is relatively narrow and the flow velocity is slightly higher. As the flow transitions to the fine end, the flow channel gradually widens and the flow velocity slowly decreases, avoiding local high or low pressure areas caused by sudden changes in flow velocity, reducing energy loss (such as eddy current dissipation), and simultaneously reducing impact wear on the inner wall of the flowmeter. In this invention, when crude oil passes through the axial microchannel, it does not need to change its flow direction and flows only in a straight line, avoiding local turbulence caused by the angle between the channel direction and the mainstream direction. The axially flowing fluid forms a "straight-line flow bundle" in the microchannel, and its momentum direction is consistent with the axial propulsion of the vortex. This can stably support the central axis of the vortex and counteract the tension generated by the circular motion of the edge bubbles. This design enhances the stability of the vortex and suppresses the interference of bubbles on the metering, thereby improving the accuracy of crude oil metering and the reliability of the equipment. In this invention, the device comprises a flowmeter housing, a threaded groove, a first threaded ring, a collar, a limiting groove, a second threaded ring, a filter screen, and mounting blocks. During disassembly, the collar can be rotated inside the flowmeter housing, and the first threaded ring can be unscrewed from the threaded groove by rotating the collar. Then, the second threaded ring can be rotated on the collar. After the second threaded ring is removed, the filter screen along with the two mounting blocks can be taken out from the two limiting grooves, thus completing the disassembly. This makes the overall assembly and disassembly of the device more convenient during use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the collar connection of the present invention; Figure 3 This is a schematic diagram of the vortex generator connected to the explosion structure of the present invention; Figure 4 This is a schematic diagram of the exploded structure of the aggregate strip connection of the present invention; Figure 5 This is a schematic diagram of the exploded structure of the scraper connection of the present invention; Figure 6 This is a schematic diagram of the exploded structure of the filter screen connection of the present invention; Figure 7 This is a schematic diagram of the exploded structure of the flow guide ring connection of the present invention; Figure 8 This is a schematic diagram of the central column connection structure of the present invention; Figure 9 This is a schematic diagram of the connection structure of the collection box of the present invention.

[0017] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 1. Flowmeter housing; 2. Detection element; 3. Converter display instrument; 4. Rectifier; 5. Threaded groove; 6. First threaded ring; 7. Bracket; 8. Guide rod; 9. Central column; 10. Axial microchannel; 11. Vortex generator; 12. Crushing tooth; 13. Collar; 14. Limiting groove; 15. Second threaded ring; 16. Guide ring; 17. Collection box; 18. Connecting port; 19. Mounting strip; 20. Crushing head; 21. Filter screen; 22. Mounting block; 23. Mesh; 24. Spring; 25. Collecting strip; 26. Arc strip; 27. Arc groove; 28. Arc slider; 29. ​​Scraper. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0019] Please see Figures 1-9 This invention provides a vortex electromagnetic flowmeter, comprising a flowmeter housing 1, a detection element 2 fixedly mounted on the upper end of the flowmeter housing 1, a conversion display instrument 3 fixedly mounted on the upper end of the detection element 2, a rectifier 4 disposed inside the discharge end of the flowmeter housing 1, a threaded groove 5 formed at the inlet end of the flowmeter housing 1, a first threaded ring 6 threadedly mounted inside the threaded groove 5, brackets 7 fixedly mounted at equal intervals on the inner wall of the first threaded ring 6, and a guide rod 8 fixedly mounted on the side wall of each bracket 7. The streamlined shape of the guide rod 8 can effectively avoid the problem of impact when in contact with crude oil. A central column 9 is fixedly mounted on the opposite end of each bracket 7. The central column 9 is conical and distributed from coarse to fine along the water flow direction of the flowmeter housing 1. At this time, the crude oil will be transported along the central column 9. In this way, when the crude oil flows in from the inlet, it will smoothly transition along the surface of the central column 9, without forming obstruction or turbulence at the front end of the central column 9, thus avoiding interference with the vortex. The formation of the flow meter housing 1 is due to the conical shape of the central column 9, which is distributed from coarse to fine along the water flow direction. This allows for the initial convergence of the water flow entering the housing 1, guiding the dispersed water flow to the central area (near the threaded groove blades) and preventing excessive diffusion of crude oil near the inlet. As the flow transitions towards the outlet (fine end), the gradual slope of the conical surface guides the water flow smoothly along the surface of the central column 9, reducing the impact turbulence when the water flows around it. Ultimately, this results in a more consistent flow velocity direction when the water enters the threaded groove blades, providing a uniform impact foundation for the stable rotation of the blades and reducing vortex frequency fluctuations caused by water flow turbulence. Furthermore, the inlet end has a relatively narrow flow channel and a slightly higher flow velocity due to the coarser central column. As the flow transitions towards the fine end, the flow channel gradually widens and the flow velocity slowly decreases, avoiding local high or low pressure zones caused by sudden changes in flow velocity, reducing energy loss (such as eddy current dissipation), and simultaneously reducing impact wear on the inner wall of the flow meter. Axial microchannels 10 are evenly spaced on the surface of the central column 9. When crude oil passes through the axial microchannels 10, it does not need to change its flow direction and flows in a straight line. This avoids local turbulence caused by the angle between the channel direction and the mainstream direction. The axially flowing fluid forms a "straight-line flow bundle" in the microchannel. Its momentum direction is consistent with the axial propulsion of the vortex, which can stably support the central axis of the vortex and counteract the tension generated by the circular motion of the edge bubbles. This design enhances the stability of the vortex and suppresses the interference of bubbles on the metering, thereby improving the accuracy of crude oil metering and the reliability of the equipment. A vortex generator 11 is rotatably mounted on one end of the central column 9. The blades of the vortex generator 11 are evenly spaced with breaking teeth 12, which can break up any remaining air bubbles, reducing their impact on the detection. A collar 13 is fixedly mounted on the side wall of the first threaded ring 6. Limiting grooves 14 are symmetrically formed on the side wall of the collar 13. A second threaded ring 15 is threaded onto the collar 13. A guide ring 16 is fixedly mounted on the inner wall of the collar 13. A collection box 17 is fixedly mounted inside the guide ring 16. The collection box 17 is located on the upper part of the inner wall of the flowmeter housing 1. The part has a connecting port 18, which is flush with the lower end of the inner wall of the collection box 17. The inner wall of the collection box 17 is fixedly installed with mounting strips 19 at equal intervals. Each mounting strip 19 is fixedly installed with a crushing head 20. The collar 13 is equipped with a filter screen 21. When crude oil passes through the filter screen 21, it will be filtered. Since the filter screen 21 is designed to be arc-shaped, the crude oil slides along the filter screen 21, the water flow direction changes gently, and almost no eddies or bubbles are generated. Compared with the existing flat plate filter screen, not only are fewer bubbles generated, but the filtration area of ​​the arc surface is also effectively increased, and the crude oil throughput is higher. Mounting blocks 22 are symmetrically fixed on the side wall of the filter screen 21. The two mounting blocks 22 are slidably installed in the two limiting grooves 14 respectively. When disassembling, the collar 13 can be rotated inside the flow meter housing 1. Under the rotation of the collar 13, the first threaded ring 6 can be unscrewed from the threaded groove 5. Then, the second threaded ring 15 can be rotated on the collar 13. After the second threaded ring 15 is removed, the filter screen 21 together with the two mounting blocks 22 can be taken out from the two limiting grooves 14 to complete the disassembly, making the overall assembly and disassembly of the device more convenient during use. The filter screen 21 has evenly spaced meshes 23, each mesh 23 with rounded corners, so that when crude oil passes through it, it is similar to sliding on a smooth pebble, making it less likely to collide and form vortices, thus greatly reducing the probability of bubble formation. Springs 24 are fixedly installed at equal intervals on the side wall of the filter screen 21. The three springs 24 are distributed in an isosceles triangle on the upper part of the filter screen 21. When the vortex generator 11 rotates, it will cause the crude oil to fluctuate slightly. At this time, the springs 24 designed on the filter screen 21 will shake, and the filter screen 21 will vibrate slightly. At this time, the small air bubbles and impurities attached to the filter screen 21 will be shaken off. The three work together to achieve the effect of preventing foaming. A collecting strip 25 is fixedly installed on the side wall of the filter screen 21. An arc-shaped strip 26 is fixedly installed in the inner wall of the collecting strip 25. An arc-shaped groove 27 is opened inside the arc-shaped strip 26. An arc-shaped slider 28 is slidably installed inside the arc-shaped groove 27. A scraper 29 is fixedly installed on the arc-shaped slider 28. The scraper 29 is slidably installed between the collecting strip 25 and the arc-shaped strip 26. The impurities filtered on the filter screen 21 will fall into the collecting strip 25 along the flow-facing surface of the filter screen 21 and be collected. This avoids the impurities impacting the vortex generator 11 and rectifier 4 inside the vortex generator 11 during crude oil transportation, causing wear and damage to the vortex generator 11 and rectifier 4. After the equipment is used regularly, the arc-shaped slider 28 can be slid inside the arc-shaped groove 27. The movement of the arc-shaped slider 28 will drive the scraper 29 to slide between the collecting strip 25 and the arc-shaped strip 26, thereby pushing the impurities collected inside the collecting strip 25. Once the scraper 29 separates from the collecting bar 25, the impurities on the scraper 29 can be cleaned. This design reduces the escape rate of impurities during collection and prevents impurities from falling back into the equipment during cleaning, resulting in a more thorough cleaning. In use, the flange on the vortex generator 11 is first connected to the flange of the crude oil conveying pipeline. When liquid flows through, the crude oil will first be filtered through the filter screen 21, and then flow along the central column 9 towards the discharge end after being guided by the guide ring 16. When the crude oil impacts the vortex generator 11, it will cause it to rotate on the central column 9, thereby generating a vortex flow inside the flowmeter housing 1. Then, it flows out after being rectified by the rectifier 4. During this process, the detection element 2 captures the fluid vortex motion signal and converts it into a measurable electrical signal. Then, the conversion display instrument 3 processes and calculates the electrical signal output by the detection element 2 and finally displays the flow data.

[0020] Working principle: The first step is to connect the flange on the vortex generator 11 to the flange on the crude oil delivery pipeline. When the liquid flows through, the crude oil will first be filtered through the filter screen 21, and then the crude oil will flow along the central column 9 towards the discharge end after being guided by the flow guide ring 16. When the crude oil impacts the vortex generator 11, it will drive it to rotate on the central column 9, thereby generating a vortex flow inside the flow meter housing 1. Then, it will flow out after being rectified by the rectifier 4. During this process, the detection element 2 captures the fluid vortex motion signal and converts it into a measurable electrical signal. Then, the conversion display instrument 3 processes and calculates the electrical signal output by the detection element 2 and finally displays the flow data. The second step involves the design of the filter screen 21, mesh 23, and spring sheet 24. When crude oil passes through the filter screen 21, it is filtered. Because the filter screen 21 is designed to be curved, the crude oil slides along the filter screen 21, and the water flow direction changes gently, generating almost no eddies or bubbles. Compared with the existing flat filter screen, it not only generates fewer bubbles, but also effectively increases the filtration area of ​​the curved surface, resulting in a higher crude oil throughput. Furthermore, the mesh 23 has rounded corners, making the crude oil slide across it like a smooth pebble, making it less likely to collide and form vortices, thus greatly reducing the probability of bubble formation. When the vortex generator 11 rotates, it causes the crude oil to fluctuate slightly. At this time, the spring sheet 24 designed on the filter screen 21 will shake accordingly, and the filter screen 21 will vibrate slightly. At this time, the small bubbles and impurities attached to the filter screen 21 will be shaken off. The three work together to achieve the effect of preventing foaming. Thirdly, the impurities filtered on the filter screen 21 will fall along the front surface of the filter screen 21 into the collection bar 25 and be collected. This avoids the impurities impacting the vortex generator 11 and rectifier 4 inside the vortex generator 11 during crude oil transportation, thus preventing wear and damage to the vortex generator 11 and rectifier 4. After the equipment is used regularly, the arc-shaped slider 28 can slide inside the arc-shaped groove 27. The movement of the arc-shaped slider 28 will drive the scraper 29 to slide between the collection bar 25 and the arc-shaped bar 26, thereby pushing the impurities collected inside the collection bar 25. When the scraper 29 separates from the collection bar 25, the impurities on the scraper 29 can be cleaned. This design reduces the escape rate of impurities during collection and prevents impurities from falling back into the equipment during cleaning, resulting in a more thorough cleaning. In the fourth step, after the crude oil is filtered, it will impact the guide ring 16. At this time, the guide ring 16 will initially guide the flow so that it can impact the central column 9, making it less likely to diffuse. Since the density of bubbles in crude oil is low, they tend to float upward. At this time, the bubbles will enter the collection box 17 with the flow of crude oil. The bubbles at the top will be punctured by the crushing head 20 on the mounting strip 19. The crude oil that has entered the collection box 17 will be discharged through the connecting port 18. By utilizing the speed difference of the crude oil flow and the buoyancy of the bubbles, the bubbles that interfere with the swirling flow are "actively guided" out of the core area. The swirling flow signal disconnection time is reduced from 1-3 seconds to less than 0.2 seconds, and it does not affect the stability of the water flow entering the threaded groove. Fifth, the crude oil will then be transported along the central column 9. This ensures a smooth transition of the crude oil as it flows in from the inlet along the surface of the central column 9, preventing obstruction or turbulence at its front end and thus avoiding interference with vortex formation. Because the central column 9 is conical and tapers from coarse to fine along the water flow direction of the flowmeter housing 1, it provides initial convergence to the water entering the housing, guiding the dispersed flow to the central area (near the threaded groove blades) and preventing excessive diffusion of crude oil near the inlet. As it transitions towards the outlet (fine end), the conical surface... The gradual slope of the surface guides the water flow to flow smoothly along the surface of the central column 9, reducing the "impact turbulence" when the water flows around it. Ultimately, when the water enters the threaded groove blades, the flow velocity direction is more consistent, providing a uniform impact foundation for the stable rotation of the blades and reducing the fluctuation of vortex frequency caused by water flow turbulence. Moreover, at the inlet end, because the central column is thicker, the flow channel is relatively narrow and the flow velocity is slightly higher. When transitioning to the thinner end, the flow channel gradually widens and the flow velocity slowly decreases, avoiding local high-pressure or low-pressure areas caused by sudden changes in flow velocity, reducing energy loss (such as eddy current dissipation), and at the same time reducing impact wear on the inner wall of the flowmeter. Step 6: When crude oil passes through the axial microchannel 10, it does not need to change its flow direction and flows in a straight line. This avoids local turbulence caused by the angle between the channel direction and the mainstream direction. The axially flowing fluid forms a "straight-line flow bundle" in the microchannel. Its momentum direction is consistent with the axial propulsion of the vortex, which can stably support the central axis of the vortex and counteract the tension generated by the circular motion of the edge bubbles. This design enhances the stability of the vortex and suppresses the interference of bubbles on the metering, thereby improving the accuracy of crude oil metering and the reliability of the equipment. In the seventh step, during disassembly, the collar 13 can be rotated inside the flowmeter housing 1. With the rotation of the collar 13, the first threaded ring 6 can be unscrewed from the threaded groove 5. Then, the second threaded ring 15 can be rotated on the collar 13. After the second threaded ring 15 is removed, the filter screen 21 along with the two mounting blocks 22 can be taken out from the two limiting grooves 14 to complete the disassembly, making the overall assembly and disassembly of the device more convenient during use.

[0021] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A vortex electromagnetic flowmeter, comprising a flowmeter housing (1), wherein a detection element (2) is fixedly mounted on the upper end of the flowmeter housing (1), and a conversion display instrument (3) is fixedly mounted on the upper end of the detection element (2), characterized in that: A rectifier (4) is provided inside the discharge end of the flow meter housing (1). A threaded groove (5) is provided at the inlet end of the flow meter housing (1). A first threaded ring (6) is threaded inside the threaded groove (5). A bracket (7) is fixedly installed at equal intervals on the inner wall of the first threaded ring (6). A guide rod (8) is fixedly installed on the side wall of each bracket (7). Each of the brackets (7) has a central column (9) fixedly installed on its opposite end. The central column (9) is conical and distributed from coarse to fine along the water flow direction of the flowmeter housing (1). Axial microchannels (10) are evenly and equidistantly opened on the surface of the central column (9). A vortex generator (11) is rotatably installed on one end of the central column (9). The blades of the vortex generator (11) are evenly and equidistantly provided with breaking teeth (12). A collar (13) is fixedly installed on the side wall of the first threaded ring (6). Limiting grooves (14) are symmetrically opened on the side wall of the collar (13). A second threaded ring (15) is threaded onto the collar (13). A guide ring (16) is fixedly installed in the inner wall of the collar (13). A collection box (17) is fixedly installed inside the guide ring (16). The collection box (17) is located on the upper part of the inner wall of the flow meter housing (1). A connecting port (18) is opened inside the collection box (17). The connecting port (18) is flush with the lower end of the inner wall of the collection box (17). Mounting strips (19) are fixedly installed at equal intervals on the inner wall of the collection box (17). A crushing head (20) is fixedly installed on each of the mounting strips (19).

2. The insertion vortex electromagnetic flow meter of claim 1 wherein, A filter screen (21) is provided inside the collar (13); Among them, the filter screen (21) is symmetrically fixedly installed with mounting blocks (22), and the two mounting blocks (22) are respectively slidably installed in two limiting grooves (14).

3. The insertion vortex electromagnetic flow meter of claim 2 wherein, The filter screen (21) has meshes (23) evenly spaced, and each mesh (23) has rounded corners; Among them, spring pieces (24) are fixedly installed at equal intervals on the side wall of the filter (21), and the three spring pieces (24) are distributed in an isosceles triangle on the upper part of the filter (21).

4. The insertion vortex electromagnetic flow meter of claim 3 wherein, A material collection strip (25) is fixedly installed on the side wall of the filter screen (21); Among them, an arc-shaped strip (26) is fixedly installed in the inner wall of the aggregate strip (25), and an arc-shaped groove (27) is opened inside the arc-shaped strip (26).

5. The insertion vortex electromagnetic flow meter of claim 4 wherein, An arc-shaped slider (28) is slidably installed inside the arc-shaped groove (27); Among them, a scraper (29) is fixedly installed on the arc-shaped slider (28), and the scraper (29) is slidably installed between the aggregate bar (25) and the arc-shaped bar (26).

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