A high-precision vortex flowmeter

Abstract

The application belongs to the technical field of vortex flowmeters, and particularly relates to a high-precision vortex flowmeter, which comprises a measuring pipe, two flanges, a sensing probe and a meter head, the two flanges are fixedly connected to the left and right ends of the measuring pipe, the sensing probe is arranged in the measuring pipe, the meter head is connected to the outer wall of the measuring pipe, and the sensing probe and the meter head are electrically connected. The high-precision vortex flowmeter can switch different specifications of resistance flow structures according to the flow rate of fluid, can enhance the vortex street signal to avoid pulse loss when the flow is small, can stabilize the vortex form to ensure the linearity of measurement when the flow is large, can widen the high-precision measurement interval, and can automatically detect the edge wear of the resistance flow structure and timely give a warning to prevent the long-term erosion from causing the drift of the measurement accuracy.

Description

Technical Field

[0001] This invention belongs to the field of vortex flow meter technology, and in particular relates to a high-precision vortex flow meter. Background Technology

[0002] Vortex flow meters are commonly used industrial fluid measurement instruments based on the Karman vortex street effect. Their working principle is that when fluid flows through a choke point in a pipe, it will generate regular vortices downstream. The vortex shedding frequency is linearly related to the fluid flow rate. The fluid flow rate can be calculated by collecting the vortex frequency signal. This flow meter has the characteristics of simple structure, no moving parts, low pressure loss, convenient maintenance, and wide applicability to media. It can be used for flow detection of liquids, gases, steam and other media, and is widely used in petrochemical, power, water conservancy, intelligent manufacturing and other industrial fields.

[0003] The obstruction fluid of existing vortex flowmeters is an integrated triangular prism structure. The cross-sectional width and axial thickness are fixed after leaving the factory. When the fluid velocity in the measuring pipe is too low, the fluid Reynolds number decreases, and it is difficult for the fixed-size obstruction fluid to form a Karman vortex street with sufficient energy and a stable period. The vortex street signal amplitude is weak, the signal-to-noise ratio is reduced, and the sensor will lose effective pulse signals. When the fluid velocity is in a high-speed condition that exceeds the measurement range for a long time, the high-speed fluid continuously impacts the fixed-size obstruction fluid, which will generate high-frequency turbulence that interferes with the standard vortex shedding law. This can easily lead to missed vortex street signals and frequency distortion. At the same time, the fluid forms alternating impact loads on the separation edges on both sides of the obstruction fluid. Long-term operation can easily cause wear on the edges of the obstruction fluid.

[0004] To address these issues, a high-precision vortex flow meter is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a high-precision vortex flow meter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-precision vortex flow meter, comprising a measuring tube, two flanges, a sensing probe, and a meter head, wherein the two flanges are fixedly connected to the left and right ends of the measuring tube, the sensing probe is disposed inside the measuring tube, and the meter head is connected to the outer wall of the measuring tube, the sensing probe and the meter head being electrically connected, and further comprising: A variable resistance fluid assembly is connected inside the measuring tube. The measuring tube has mounting holes for installing the variable resistance fluid assembly in its wall. The sensing probe is located on one side of the variable resistance fluid assembly. A detection component, connected inside the variable choke fluid assembly, is used to detect the degree of wear on the separation edge of the variable choke fluid assembly; A bottom cover is fixedly connected to the lower wall of the measuring tube. A mounting plate is bolted to the lower wall of the bottom cover, and a bottom sealing assembly is connected to the side wall of the mounting plate.

[0007] Preferably, the variable flow-blocking assembly includes a mounting base, a first flow-blocking cylinder, a second flow-blocking cylinder, a flow-blocking component, a cover, a top plate, and four small electric push rods. The mounting base is inserted into a mounting hole, and a sliding opening is provided on the side wall of the mounting base. The first flow-blocking cylinder is movably inserted into the sliding opening, the second flow-blocking cylinder is movably inserted into the first flow-blocking cylinder, and the flow-blocking component is movably inserted into the second flow-blocking cylinder. The cover is fixedly connected to the upper side wall of the mounting base and is a detachable structure. The top plate is fixedly connected to the upper end of the cover, and the top plate and the flow-blocking component are fixedly connected by the same connecting pin. The four small electric push rods are fixedly connected to the upper side wall of the top plate in a cross shape. The moving ends of two opposite small electric push rods pass through the top plate and are fixedly connected to the same lifting frame. The two lifting frames are respectively connected to the first flow-blocking cylinder and the second flow-blocking cylinder. The lower ends of the first flow-blocking cylinder and the second flow-blocking cylinder are both connected to a sealing component, which is made of high-temperature resistant rubber.

[0008] Preferably, the detection assembly includes four detection seats, four pressure sensors, and four plastic triangular prisms. The four detection seats are respectively connected to the inner walls of the first flow-blocking cylinder and the second flow-blocking cylinder. The four pressure sensors are respectively connected to the four detection seats. The four plastic triangular prisms are respectively connected to the detection ends of the four pressure sensors. The four plastic triangular prisms are respectively in contact with the separation edge of the second flow-blocking cylinder and the flow-blocking component.

[0009] Preferably, the sealing assembly includes a small lead screw module, a movable plate, a first micro electric push rod, and a sealing base. The small lead screw module is fixedly connected to the side wall of the mounting plate, the movable plate is fixedly connected to the movable end of the small lead screw module, the first micro electric push rod is fixedly connected to the upper side wall of the movable plate, and the sealing base is fixedly connected to the movable end of the first micro electric push rod. The lower side wall of the measuring tube has a lifting port that matches the sealing base, and the upper side wall of the sealing base is in contact with the lower ends of the first flow-blocking cylinder, the second flow-blocking cylinder, and the flow-blocking component.

[0010] Preferably, a second micro electric push rod is fixedly connected to the upper side wall of the movable plate, a placement plate is fixedly connected to the movable end of the second micro electric push rod, a bent tube is fixedly connected to the upper side wall of the placement plate, an adsorption head is fixedly connected to the upper end of the bent tube, and a scraper is connected to the upper side wall of the adsorption head.

[0011] Preferably, the upper side wall of the placement plate is connected to an adsorption box, the side wall of the adsorption box is connected to a negative pressure pump, the air inlet of the negative pressure pump is connected to the adsorption box, the side wall of the mounting plate is provided with an exhaust port, and an adsorption tube is connected between the adsorption box and the adsorption head.

[0012] Preferably, the upper and lower inner walls of the measuring tube are symmetrically connected with two guide seats, the two guide seats on the upper side are fitted with the mounting seat, and the two guide seats on the lower side are fitted with the sealing base.

[0013] Preferably, a guide ring is fixedly connected to the inner wall of the measuring tube, and multiple guide plates are fixedly connected to the inner wall of the guide ring.

[0014] Compared with existing technologies, the advantages of a high-precision vortex flow meter are: This invention utilizes a variable flow-blocking component. When measuring fluid with low velocity in the measuring tube, a small electric actuator drives a first flow-blocking cylinder to insert into the measuring tube. The cross-sectional width of the first flow-blocking cylinder is larger than that of a conventional flow-blocking device. As the fluid with low velocity passes through the first flow-blocking cylinder, the pressure difference around the fluid increases, resulting in a stronger vortex shedding signal. This makes it easier for the sensor probe to identify valid pulses, solving the problems of signal loss and skipped counts at low flow rates. When the fluid velocity in the measuring tube is too high, the small electric actuator drives the first and second flow-blocking cylinders to extend out of the measuring tube, so that the flow-blocking components face the fluid. The cross-sectional width of the flow-blocking components is smaller than that of conventional flow-blocking devices. The smaller cross-sectional width of the flow-blocking components results in less disturbance to high-speed fluids, maintaining a stable and single Karman vortex street even at high flow rates. The vortex frequency linearity is good, and the pulse signal is clean, thus ensuring the measurement accuracy of the vortex flow meter.

[0015] This invention utilizes a detection component. When a small electric push rod moves the first and second flow-blocking cylinders up and down, it simultaneously moves the internal detection seat. The detection seat then moves the pressure sensor and the plastic triangular prism. The plastic triangular prism slides along the separation edges on both sides of the second flow-blocking cylinder and the flow-blocking component. When the separation edges wear down, the plastic triangular prism will bounce as it passes through the worn area. The corresponding pressure sensor will detect this and thus remind the operator to replace the worn parts in a timely manner.

[0016] This invention, through the arrangement of a placement plate, adsorption box, negative pressure pump, bend, adsorption head, scraper, and adsorption tube, allows impurities to adhere to the bottom of the variable resistance fluid assembly after use due to the sliding scraping action. Through the cooperation of a small lead screw module and a second micro electric push rod, the adsorption head and scraper pass through the lower lifting port and extend into the measuring tube. The scraper then removes the impurities from the bottom of the variable resistance fluid assembly and transports them to the adsorption box for storage, thus preventing impurities from scratching the internal components of the variable resistance fluid assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-precision vortex flow meter provided by the present invention; Figure 2 This is a schematic diagram of the measuring tube in this invention; Figure 3 This is a schematic diagram showing the position of the sensing probe in this invention; Figure 4 This is a schematic diagram showing the positional relationship between the sealing base and the first flow-blocking cylinder in this invention; Figure 5 In this invention Figure 4 An enlarged schematic diagram of part A in the middle; Figure 6 This is a schematic diagram of the detection component in this invention; Figure 7 This is an exploded schematic diagram of the first flow-blocking cylinder, the second flow-blocking cylinder, and the flow-blocking component in this invention; Figure 8 This is a schematic diagram of the bottom sealing component in this invention; Figure 9 This is a schematic diagram of the surface structure of the placement plate in this invention; Figure 10 This is a schematic diagram of the structure of the guide ring and guide plate in this invention.

[0018] In the diagram: 1 Measuring tube, 2 Flange, 3 Sensor probe, 4 Gauge, 5 Mounting hole, 6 Bottom cover, 7 Mounting plate, 8 Variable flow resistance assembly, 81 Mounting base, 82 First flow resistance cylinder, 9 Second flow resistance cylinder, 10 Flow resistance component, 11 Enclosure, 12 Top plate, 13 Connecting pin, 14 Small electric push rod, 15 Lifting frame, 16 Detection assembly, 161 Detection base, 162 Pressure sensor, 17 Plastic triangular prism, 18 Bottom sealing assembly, 181 Small lead screw module, 182 Moving plate, 19 First miniature electric push rod, 20 Sealing base, 21 Lifting port, 22 Second miniature electric push rod, 23 Placement plate, 24 Adsorption box, 25 Negative pressure pump, 26 Bend, 27 Adsorption head, 28 Scraper, 29 Adsorption tube, 30 Guide seat, 31 Seal, 32 Guide ring, 33 Guide plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-7 and Figure 10As shown, a high-precision vortex flow meter includes a measuring tube 1, two flanges 2, a sensor probe 3, and a meter head 4. The two flanges 2 are fixedly connected to the left and right ends of the measuring tube 1. The sensor probe 3 is disposed inside the measuring tube 1. The meter head 4 is connected to the outer wall of the measuring tube 1 and is electrically connected to the sensor probe 3 and the meter head 4. A guide ring 32 is fixedly connected to the inner wall of the measuring tube 1, and multiple guide plates 33 are fixedly connected to the inner wall of the guide ring 32. The meter also includes a variable flow resistance assembly 8, which is connected inside the measuring tube 1. The measuring tube 1 has a mounting hole 5 for installing the variable flow resistance assembly 8. The sensor probe 3 is located on one side of the variable flow resistance assembly 8. The variable flow resistance assembly 8 includes a mounting base 81, a first flow resistance cylinder 82, a second flow resistance cylinder 9, a flow resistance element 10, a cover 11, a top plate 12, and four small electric push rods 14. The mounting base 81 is inserted into the mounting hole 5. The side wall of the mounting base 81 has a sliding port. The flow tube 82 is movably inserted into the sliding port, and a sealing component is provided in the sliding port to ensure the sealing between the mounting base 81 and the first flow-blocking tube 82. The second flow-blocking tube 9 is movably inserted into the first flow-blocking tube 82, and the flow-blocking component 10 is movably inserted into the second flow-blocking tube 9. The enclosure 11 is fixedly connected to the upper side wall of the mounting base 81 and is a detachable structure. The top plate 12 is fixedly connected to the upper end of the enclosure 11, and the same connecting pin 13 is fixedly connected between the top plate 12 and the flow-blocking component 10. Four small electric push rods 14 are fixedly connected to the upper side wall of the top plate 12 in a cross shape. The moving ends of two opposite small electric push rods 14 pass through the top plate 12 and are fixedly connected to the same lifting frame 15. The two lifting frames 15 are respectively connected to the first flow-blocking tube 82 and the second flow-blocking tube 9. The lower ports of the first flow-blocking tube 82 and the second flow-blocking tube 9 are both connected to a sealing component 31, which is made of high-temperature resistant rubber.

[0021] In actual use, when the fluid velocity in the measuring tube 1 is too low and the flow rate is small, the device drives the lifting frame 15 to move downward via the corresponding small electric push rod 14, causing the first flow-blocking cylinder 82 to extend and insert into the main flow channel of the measuring tube 1. At this time, the first flow-blocking cylinder 82 with a large cross-section is used as the main flow-blocking fluid. Compared with conventional flow-blocking fluids, the first flow-blocking cylinder 82 has a larger cross-sectional width, which can significantly improve the pressure difference around the low-speed fluid, enhance the vortex shedding intensity, and increase the amplitude of the originally weak vortex pulse signal. This allows the sensing probe 3 to stably identify and capture effective pulse signals, solving the problems of signal loss, metering jumps, and inaccurate lower limit measurements at low flow rates. To lower the lower limit of flow meter measurement, when the fluid velocity in the measuring tube 1 is too high and the flow rate is high, the first flow-blocking cylinder 82 and the second flow-blocking cylinder 9 are driven to retract upward by the small electric push rod 14, so that the internal small cross-section flow-blocking element 10 is exposed and faces the main flow. The flow-blocking element 10 serves as the main vortex shedding structure. The cross-sectional width of the flow-blocking element 10 is much smaller than that of conventional flow-blocking elements, resulting in small disturbance amplitude and small flow field distortion to high-speed fluids. It can maintain a stable, single and orderly Karman vortex street under high flow velocity conditions, ensuring that the vortex shedding frequency and the fluid flow rate maintain a high-precision linear correspondence, and improving the measurement linearity and stability under high flow conditions.

[0022] like Figure 6 As shown, in this embodiment, the detection component 16 is connected inside the variable flow-blocking component 8 and is used to detect the wear degree of the separation edge of the variable flow-blocking component 8. The detection component 16 includes four detection seats 161, four pressure sensors 162, and four plastic triangular prisms 17. The four detection seats 161 are respectively connected to the inner walls of the first flow-blocking cylinder 82 and the second flow-blocking cylinder 9. The four pressure sensors 162 are respectively connected to the four detection seats 161. The four plastic triangular prisms 17 are respectively connected to the detection ends of the four pressure sensors 162. The four plastic triangular prisms 17 are respectively in contact with the separation edge of the second flow-blocking cylinder 9 and the flow-blocking component 10.

[0023] In actual use, during the up-and-down extension and retraction adjustment of the first flow-blocking cylinder 82 and the second flow-blocking cylinder 9 driven by the small electric push rod 14 in this embodiment, the inner detection seat 161, pressure sensor 162, and plastic triangular prism 17 will be moved synchronously. This allows the plastic triangular prism 17 to continuously slide and adhere to the surface of the separation edge of the second flow-blocking cylinder 9 and the flow-blocking component 10 for detection. When the separation edge is intact and without wear, the edge is flat and smooth, the plastic triangular prism 17 is subjected to uniform sliding force, and the pressure value detected by the pressure sensor 162 is stable without fluctuation. When the separation edge is worn, dented, or deformed due to long-term erosion, the plastic triangular prism 17 will slightly jump when passing through the wear defect area. The pressure sensor 162 can capture the pressure fluctuation signal in real time and upload it to the meter head 4 to realize automatic identification and early warning of wear faults, reminding the operator to replace the worn parts in time, and avoiding problems such as drift in measurement accuracy and vortex shedding disorder caused by wear of the flow-blocking fluid. At the same time, the wear on the outer side of the first flow-blocking cylinder 82 can be re-inspected manually to realize all-round wear monitoring and ensure the accuracy of the flow-blocking structure.

[0024] like Figure 8 and Figure 9 As shown, further, in this embodiment, the bottom cover 6 is fixedly connected to the lower wall of the measuring tube 1. The lower wall of the bottom cover 6 is bolted to a mounting plate 7. The side wall of the mounting plate 7 is connected to a sealing assembly 18. The sealing assembly 18 includes a small lead screw module 181, a moving plate 182, a first micro electric push rod 19, and a sealing base 20. The small lead screw module 181 is fixedly connected to the side wall of the mounting plate 7, the moving plate 182 is fixedly connected to the moving end of the small lead screw module 181, and the first micro electric push rod 19 is fixedly connected to the side wall of the mounting plate 7. The measuring tube 1 is fixedly connected to the upper side wall of the moving plate 182. The sealing base 20 is fixedly connected to the moving end of the first micro electric push rod 19. The upper and lower inner walls of the measuring tube 1 are symmetrically connected to two guide seats 30. The two guide seats 30 on the upper side are in contact with the mounting base 81, and the two guide seats 30 on the lower side are in contact with the sealing base 20. The lower side wall of the measuring tube 1 is provided with a lifting port 21 that matches the sealing base 20. The upper side wall of the sealing base 20 is in contact with the lower end of the first flow-blocking cylinder 82, the second flow-blocking cylinder 9, and the flow-blocking component 10.

[0025] In actual use, after the variable flow resistance assembly 8 completes its extension and retraction adjustment and determines the working position, the operator starts the first micro electric push rod 19 through the external controller. The first micro electric push rod 19 vertically pushes the sealing base 20 through the lifting port 21 and into the measuring tube 1, so that the upper surface of the sealing base 20 is tightly sealed with the lower end of the currently working flow resistance. On the one hand, it can provide vertical support and limit the multi-stage variable flow resistance assembly 8, improve the working stability of the variable flow resistance assembly 8, and avoid structural shaking, displacement, and vibration interference signals caused by fluid impact. On the other hand, it blocks the bottom gap of the variable flow resistance assembly 8, preventing the fluid from bypassing the gap at the lower end of the variable flow resistance assembly 8, so that all the fluid in the pipeline must pass through the flow resistance body to complete the flow around, so that the number and frequency of vortex shedding form a precise correspondence with the actual flow rate of the pipeline, eliminating the problems of measurement distortion and accuracy deviation caused by bypass flow.

[0026] like Figure 8 and Figure 9 As shown, further, in this embodiment, a second micro electric push rod 22 is fixedly connected to the upper side wall of the movable plate 182, and a placement plate 23 is fixedly connected to the moving end of the second micro electric push rod 22. An adsorption box 24 is connected to the upper side wall of the placement plate 23, and a negative pressure pump 25 is connected to the side wall of the adsorption box 24. The air inlet of the negative pressure pump 25 is connected to the adsorption box 24. An exhaust port is opened on the side wall of the mounting plate 7. A bent pipe 26 is fixedly connected to the upper side wall of the placement plate 23. An adsorption head 27 is fixedly connected to the upper end of the bent pipe 26. A scraper 28 is connected to the upper side wall of the adsorption head 27. An adsorption tube 29 is connected between the adsorption box 24 and the adsorption head 27.

[0027] In actual use, after the flow meter has been working for a long time, fluid impurities will adhere to the surface of the variable flow resistance assembly 8. During the retraction and reset process of the first flow resistance cylinder 82 and the second flow resistance cylinder 9, the lower end seal 31 can pre-scrape away the impurities on the outside of the second flow resistance cylinder 9 and the flow resistance component 10, causing the impurities to accumulate at the bottom of the variable flow resistance assembly 8. During the impurity removal operation, the controller first controls the small lead screw module 181 to move, driving the moving plate 182 to move horizontally, moving the placement plate 23, the suction head 27, and the scraper 28 to directly below the lifting port 21. Then, the second micro electric push rod 22 is activated to lift upwards, so that the scraper 28 is in contact with the bottom end face of the variable flow barrier component 8 and the adsorption head 27 is close to the cleaning area. Then, the scraper 28 is driven to move horizontally by the small lead screw module 181 to mechanically scrape off the impurities attached to the bottom of the flow barrier. At the same time, the negative pressure pump 25 is activated to extract the air inside the adsorption box 24 to form a negative pressure. The external airflow carries the scraped impurities and enters the adsorption box 24 for centralized storage through the adsorption head 27, the bend 26 and the adsorption tube 29, thus completing the automatic cleaning.

[0028] The operating principle of this invention is explained as follows: After the fluid enters the measuring tube 1, it is first rectified by the guide ring 32 and the guide plate 33. When it flows through the variable flow resistance assembly 8, a Karman vortex street is generated. The vortex frequency signal is collected by the sensor probe 3 and transmitted to the meter 4 to complete the flow rate calculation. During the measurement process, the small electric push rod 14 on the top plate 12 can drive the first flow resistance cylinder 82 and the second flow resistance cylinder 9 to extend and retract along the mounting base 81 through the lifting frame 15. Under low flow velocity conditions, the first flow resistance cylinder 82 with a large cross-section extends to enhance the pressure difference and vortex flow around the flow. The signal strength is improved to solve the problem of signal loss at low flow rates. Under high flow rate conditions, the flow obstruction element 10 with a small cross-section is retracted to reduce fluid disturbance and maintain a stable and orderly Karman vortex street, thereby widening the measurement range and ensuring measurement accuracy across the entire range. The detection component 16 moves synchronously with the first flow obstruction cylinder 82 and the second flow obstruction cylinder 9. The pressure sensor 162 on the detection seat 161 drives the plastic triangular prism 17 to slide along the separation edge of the second flow obstruction cylinder 9 and the flow obstruction element 10. The wear degree of the edge is identified based on the pressure fluctuation signal to achieve wear warning. After the variable flow resistance component 8 is adjusted to the correct position, the sealing component 18 at the mounting plate 7 below the bottom cover 6 drives the moving plate 182 to move horizontally via the small screw module 181. The sealing base 20 is driven by the first micro electric push rod 19 to extend into the measuring tube 1 from the lifting port 21. Together with the guide seat 30 and the sealing element 31, it seals and supports the lower end of the variable flow resistance component 8 to prevent fluid bypass flow from causing measurement distortion. During maintenance and cleaning, the second micro electric push rod 22 lifts the placement plate 23, allowing the scraper 28 and the adsorption head 27 to extend into the tube. The horizontal scraping operation is completed by the small screw module 181. At the same time, the negative pressure pump 25 creates a negative pressure in the adsorption box 24. The scraped impurities are sucked into the adsorption box 24 through the adsorption tube 29 and the bend 26 for centralized collection, preventing impurities from scratching the internal components.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision vortex flow meter, comprising a measuring tube (1), two flanges (2), a sensing probe (3), and a meter head (4), wherein the two flanges (2) are fixedly connected to the left and right ends of the measuring tube (1), the sensing probe (3) is disposed inside the measuring tube (1), and the meter head (4) is connected to the outer wall of the measuring tube (1), and the sensing probe (3) and the meter head (4) are electrically connected, characterized in that, Also includes: A variable flow resistance assembly (8) is connected inside the measuring tube (1). The measuring tube (1) has a mounting hole (5) for installing the variable flow resistance assembly (8) on its wall. The sensing probe (3) is located on one side of the variable flow resistance assembly (8). The detection component (16) is connected inside the variable choke fluid assembly (8) and is used to detect the wear degree of the separation edge of the variable choke fluid assembly (8); A bottom cover (6) is fixedly connected to the lower wall of the measuring tube (1). A mounting plate (7) is bolted to the lower wall of the bottom cover (6). A sealing assembly (18) is connected to the side wall of the mounting plate (7). The variable flow obstruction assembly (8) includes a mounting base (81), a first flow obstruction cylinder (82), a second flow obstruction cylinder (9), a flow obstruction element (10), a shroud (11), a top plate (12), and four small electric push rods (14). The mounting base (81) is inserted into the mounting hole (5). The mounting base (81) has... A sliding opening is provided on the side wall. The first flow-blocking cylinder (82) is movably inserted into the sliding opening. The second flow-blocking cylinder (9) is movably inserted into the first flow-blocking cylinder (82). The flow-blocking component (10) is movably inserted into the second flow-blocking cylinder (9). The enclosure (11) is fixedly connected to the upper side wall of the mounting base (81). The enclosure (11) is a detachable structure. The top plate (12) is fixedly connected to the upper end of the enclosure (11). The top plate (12) and the flow-blocking component (10) are fixedly connected by the same connecting pin (13). Four small electric push rods (14) are fixedly connected in a cross shape to the upper side wall of the top plate (12). The moving ends of two of the small electric push rods (14) pass through the top plate (12) and are fixedly connected to the same lifting frame (15). The two lifting frames (15) are respectively connected to the first flow-blocking cylinder (82) and the second flow-blocking cylinder (9). The lower ports of the first flow-blocking cylinder (82) and the second flow-blocking cylinder (9) are both connected to a sealing element (31). The sealing element (31) is made of high-temperature resistant rubber. The detection component (16) includes... It includes four detection seats (161), four pressure sensors (162), and four plastic triangular prisms (17). The four detection seats (161) are respectively connected to the inner walls of the first flow-blocking cylinder (82) and the second flow-blocking cylinder (9). The four pressure sensors (162) are respectively connected to the four detection seats (161). The four plastic triangular prisms (17) are respectively connected to the detection ends of the four pressure sensors (162). The four plastic triangular prisms (17) are respectively in contact with the separation edges of the second flow-blocking cylinder (9) and the flow-blocking component (10).

2. The high-precision vortex flow meter according to claim 1, characterized in that, The sealing assembly (18) includes a small lead screw module (181), a moving plate (182), a first micro electric push rod (19), and a sealing base (20). The small lead screw module (181) is fixedly connected to the side wall of the mounting plate (7). The moving plate (182) is fixedly connected to the moving end of the small lead screw module (181). The first micro electric push rod (19) is fixedly connected to the upper side wall of the moving plate (182). The sealing base (20) is fixedly connected to the moving end of the first micro electric push rod (19). The lower side wall of the measuring tube (1) is provided with a lifting port (21) that matches the sealing base (20). The upper side wall of the sealing base (20) is in contact with the lower ends of the first flow-blocking cylinder (82), the second flow-blocking cylinder (9), and the flow-blocking component (10).

3. A high-precision vortex flow meter according to claim 2, characterized in that, The upper side wall of the movable plate (182) is fixedly connected to a second micro electric push rod (22), the movable end of the second micro electric push rod (22) is fixedly connected to a placement plate (23), the upper side wall of the placement plate (23) is fixedly connected to a bent tube (26), the upper end of the bent tube (26) is fixedly connected to an adsorption head (27), and the upper side wall of the adsorption head (27) is connected to a scraper (28).

4. A high-precision vortex flow meter according to claim 3, characterized in that, The upper side wall of the placement plate (23) is connected to an adsorption box (24), the side wall of the adsorption box (24) is connected to a negative pressure pump (25), the air inlet of the negative pressure pump (25) is connected to the adsorption box (24), the side wall of the mounting plate (7) is provided with an exhaust port, and an adsorption tube (29) is connected between the adsorption box (24) and the adsorption head (27).

5. A high-precision vortex flow meter according to claim 2, characterized in that, The measuring tube (1) has two guide seats (30) symmetrically connected to its upper and lower inner walls. The two guide seats (30) on the upper side are attached to the mounting base (81), and the two guide seats (30) on the lower side are attached to the sealing base (20).

6. A high-precision vortex flow meter according to claim 1, characterized in that, The inner wall of the measuring tube (1) is fixedly connected to a guide ring (32), and the inner wall of the guide ring (32) is fixedly connected to a plurality of guide plates (33).

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