A Venturi vortex flowmeter capable of online calibration

Abstract

The present invention discloses a Venturi vortex flowmeter capable of online calibration, and relates to the technical field of flowmeters. The vortex flowmeter comprises a circulation tube body, which is provided with a water inlet and a water outlet, a vortex forming plate provided on the circulation tube body, the vortex forming plate is slidably connected to the circulation tube body, a throat channel is opened in the circulation tube body, pressure taking ports are respectively provided on the water inlet and the circulation tube body, a test tube is provided between the pressure taking ports, a differential pressure transmitter is provided on the test tube, a hand valve is provided in each pressure taking port, an expansion groove is provided in the circulation tube body, the vortex forming plate is slidably connected to the expansion groove, a swing cylinder is provided on the circulation tube body, a measuring flow meter is provided on the swing cylinder, an eddy current detection component is provided in the swing cylinder, and the eddy current detection component is electrically connected to the measuring flow meter through a wire. The present invention has the functions of adapting to multi-flow rate detection and increasing detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of flowmeters, in particular to a Venturi vortex flowmeter capable of online calibration. Background Art

[0002] Flow measurement is one of the components of metrology science and technology. It plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. There are many types of flow meters, and the application field of each flow meter is closely related to the application medium. Only in this way can the maximum role of different types of flow meters be brought into play. For example, vortex flowmeters are used to measure the flow of industrial pipeline media fluids, such as gas, liquid, steam and other media. They are characterized by small pressure loss, large measuring range, high accuracy, and are almost unaffected by parameters such as fluid density, pressure, temperature, and viscosity when measuring working volume flow.

[0003] A vortex flowmeter is a flowmeter that measures the volume flow of gas or liquid based on the Karman vortex principle. During use, a barrier of a specific shape is usually used to generate a specific vortex, which can bear a large pressure. The Venturi vortex flowmeter not only realizes the above characteristics, but also makes the measurement accuracy more accurate. However, if it is used for a long time, it will also cause fatigue errors in the internal detection components. At the same time, the degree of corrosion of the detection part also greatly affects the detection accuracy. At this time, manual calibration is required, and the cost required will increase. Summary of the Invention

[0004] The object of the present invention is to provide a Venturi vortex flowmeter that can be calibrated online to solve the problems raised in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: the vortex flowmeter includes a circulation tube body, a water inlet and a water outlet are provided on the circulation tube body, a vortex forming plate is provided on the circulation tube body, the vortex forming plate is slidably connected to the circulation tube body, a throat channel is opened in the circulation tube body, pressure taking ports are respectively provided on the water inlet and the circulation tube body, a test tube is provided between the pressure taking ports, a differential pressure transmitter is provided on the test tube, a hand valve is provided in each pressure taking port, an expansion groove is provided in the circulation tube body, the vortex forming plate is slidably connected to the expansion groove, a swing cylinder is provided on the circulation tube body, a measuring flow meter is provided on the swing cylinder, an eddy current detection component is provided in the swing cylinder, and the eddy current detection component is electrically connected to the measuring flow meter through a wire. Connection. When conducting flow detection, water will enter the throat channel through the water inlet, and after passing through the vortex forming plate, vortices will be formed on both sides of the vortex forming plate, so that the vortex detection component can shake. After the vortex detection component shakes, the sensor component in the swing cylinder will generate an induced current, and the induced current enters the measuring flow meter, thereby completing the flow measurement. After working for a long time, the eddy current detection component may produce errors. In order to avoid the above-mentioned occurrence, the hand valve is controlled to allow the flowing medium to enter the pressure taking port and flow into the differential pressure transmitter through the inspection tube. The measuring flow meter will be calibrated according to the detection results of the differential pressure transmitter to ensure the accuracy of the detection information.

[0006] A lifting cylinder is provided on the circulation tube body, and the vortex forming plate is slidably connected to the lifting cylinder. A lifting spring is provided in the lifting cylinder, and the two ends of the lifting spring respectively press against the lifting cylinder and the vortex forming plate. A sealing assembly is provided on the lifting cylinder, and the vortex forming plate passes through the sealing assembly and is slidably connected to the sealing assembly. When the flow velocity of the flowing medium is large, the vortex forming plate will change according to the specific flow velocity, and the lifting spring will press against the vortex forming plate, so that the vortex forming plate can be reset in time, and the sealing assembly can prevent the flowing medium from flowing into the lifting cylinder, thereby extending the service life of the equipment.

[0007] An induction frame is provided in the circulation tube body, and a wedge plate is provided on the induction frame. The wedge plate is slidably connected to the induction frame, and a traction spring is provided on the wedge plate, which is connected to the induction frame. A toggle frame is provided on the wedge plate, and the toggle frame is slidably connected to the vortex forming plate. A smooth slide rail is provided in the induction frame, and the wedge plate is in continuous contact with the smooth slide rail. When the flow rate is faster, the induction frame will be driven to move under the action of the wedge plate, and the toggle frame will also move downward. The toggle frame will drive the vortex plate to move downward, and the smooth slide rail will limit the moving direction and progress of the toggle frame. After the vortex plate moves downward, it will contact the expansion groove, thereby causing the vortex plate to deform. When the flow rate is slow, it will be reset under the action of the lifting spring and the traction spring.

[0008] A vortex plate and a vortex sub-plate are provided on the vortex forming plate, and the vortex plate and the vortex sub-plate are rotationally connected. A composite spring group is provided between the vortex plate and the vortex sub-plate, and both ends of the composite spring group are respectively pressed against the vortex plate and the vortex sub-plate, and the vortex plate and the vortex sub-plate are respectively in sliding contact with the expansion groove. After the vortex plate moves, the expansion grooves on both sides of the vortex plate are in contact, thereby increasing the speed of vortex generation on both sides of the vortex plate, and making the vortices on both sides of the vortex more uniform, avoiding the problem of unstable flow rate causing untimely swing response, and the composite spring group will always pull the vortex sub-plates on both sides, reducing the pressure of the eddy current detection component, and allowing the vortex sub-plate to be reset in time.

[0009] The expansion trough includes an expansion frame and a baffle plate. The expansion frame is arranged in the circulation tube body, and the baffle plate is arranged on the expansion frame. The vortex plate and the vortex sub-plate are in sliding contact with the two sides of the expansion frame respectively. Vortex forming frames are respectively arranged on both sides of the baffle plate. The vortex forming frame is connected to the baffle plate. After the vortex plate moves downward, the vortex sub-plate will also be against the vortex forming frame, and the vortex forming frame will be supported, so that the vortex forming frame rises upward, increasing the range of vortex formation, thereby avoiding the error problem caused by insufficient vortex force caused by expansion.

[0010] The eddy current detection component includes a swing frame, which is rotatably connected to the circulation tube body through a rotating shaft. A sealing sleeve is provided on the circulation tube body, and the sealing sleeve is sleeved on the swing frame. A sliding box is provided in the swing cylinder. The swing frame is slidably connected to the sliding box at one end away from the circulation tube body. A feedback circuit board is provided in the sliding box, and the feedback circuit board is electrically connected to the measuring flow meter through a wire. When the eddy current is formed, it will pass through both sides of the swing frame, thereby driving the swing frame to swing. The swing frame swings in the swing cylinder and slides in the sliding box, thereby contacting the feedback circuit board, generating a changing current, and transmitting the current to the measuring flow meter, thereby completing the measurement. The sealing sleeve ensures that the feedback circuit board will not be corroded by water.

[0011] A limiting frame is provided in the swing cylinder, the swing frame is embedded in the limiting frame and is slidably connected to the limiting frame, a traction column is provided on the circulation tube body, a traction link is provided in the traction column, the traction link is connected to the swing frame at one end away from the traction column, the traction column is rotatably connected to the traction link, and a rising flow groove is provided at the bottom end of the traction link. The limiting frame limits the moving trajectory of the swing frame, so that the swing frame can withstand greater impact, and the setting of the traction link can also increase the pressure that the swing frame can withstand. At the same time, the traction link can also maintain the formation time of the eddy current, thereby increasing the accuracy of the induced eddy current.

[0012] A boosting spring and a pressure plate are provided in the upflow trough, and the two ends of the boosting spring are respectively against the pressure plate and the upflow trough. A plurality of guide ports are provided at the bottom end of the traction column, and an anti-reverse ring is provided on the water outlet. The anti-reverse ring is provided with an anti-reverse net, and the inner surface of the anti-reverse ring is a wedge surface. When the traction link swings, the upflow trough will also swing accordingly, and the upflow trough will collect the flow medium, and the pressure plate will retract into the upflow trough and complete the pressure accumulation under the action of the boosting spring. Then, when the upflow trough drops, the boosting spring will release the elastic force, driving the pressure plate to move, and the pressure plate will discharge the internal flow medium and spray it toward the swing frame, thereby flushing the swing frame.

[0013] A flow stabilizer is provided on the water inlet, and the flow stabilizer includes a flow stabilizer ring, a plurality of drainage ports are provided on the flow stabilizer ring, each drainage port is provided with a drainage pipe, each drainage pipe is connected to the drainage port, a plurality of downstream blades are provided on the flow stabilizer ring, each downstream blade is rotatably connected to the flow stabilizer ring, and a swing block is provided on the downstream blade located inside the flow stabilizer ring, each swing block is in sliding contact with the corresponding drainage pipe, and a plurality of buffer springs are provided in the flow stabilizer ring, each buffer spring is respectively against the corresponding drainage pipe, after the flow medium flows through the flow stabilizer, it will flow into the drainage pipe from the drainage port, and the downstream blade will swing in the direction of the water flow, thereby driving the swing block to rotate, and the swing block will squeeze the drainage pipe after rotation, and the drainage pipe will spray out the flow medium in the direction of the water vortex, thereby destroying the rotating vortex, and the buffer spring is responsible for resetting the drainage pipe. The destroyed vortex will flow into the Venturi pipe in a straight direction, fully reducing the degree to which the rotating water flow affects the formation of the vortex.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention adopts a structural component with flow rate compensation. By changing the shape of the vortex rod, it can adapt to the generation of vortex under various flow rates. By changing the range of vortex generation, it can compensate for the problem of too short vortex residence time under high flow rate. It can also adapt to the detection of media with variable flow rate. During the detection process, it can not only increase the detection accuracy, but also greatly improve the service life of the equipment and reduce the impact corrosion of the detection part.

[0016] 2. The present invention adopts a structural component with automatic flushing, which uses the lifting energy generated during swinging to flush the swing frame, reducing the corrosion of impurities, fully improving the swing accuracy of the swing frame, and also extending the service life of the swing frame.

[0017] 3. The present invention adopts a structural component with a stable water flow direction to impact and drain the flowing medium, thereby reducing the problem of uneven eddy currents in the flowing medium caused by eddy currents, and also reducing the problem of eddy current backflow, so that the volume and flow of the medium can be detected more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the flow tube structure of the present invention;

[0020] Figure 3 for Figure 2 The structural diagram of the partially enlarged A in the middle;

[0021] Figure 4 for Figure 2 The structural diagram of the partially enlarged B in the middle;

[0022] Figure 5 It is a structural schematic diagram of the expansion frame and the traction column of the present invention.

[0023] Figure 6 Schematic diagram of the vortex forming plate structure of the present invention

[0024] Figure 7 Schematic diagram of the structure of the current stabilizer of the present invention

[0025] Figure 8 This is a partial cross-sectional structural diagram of the traction link of the present invention.

[0026] In the figure: 1. Flow pipe body; 101. Lifting cylinder; 102. Lifting spring; 103. Sealing assembly; 104. Induction frame; 105. Wedge plate; 106. Traction spring; 107. Toggle frame; 108. Sliding rail; 2. Water inlet; 201. Flow stabilizer; 202. Flow stabilizing ring; 203. Drainage port; 204. Drainage pipe; 205. Downstream blade; 206. Swing block; 207. Buffer spring; 3. Water outlet; 301. Anti-reverse ring; 302. Anti-reverse net; 4. Vortex forming plate; 401. Vortex plate; 402. Vortex auxiliary plate; 403. Composite spring assembly; 5. Throat channel; 6. Pressure tapping port; 7. Inspection tube; 8. Differential pressure transmitter; 9. Hand valve; 10. Expansion slot; 1001. Expansion frame; 1002. Baffle plate; 1003. Eddy current forming frame; 11. Swinging cylinder; 12. Measuring flow meter; 13. Eddy current detection assembly; 1301. Swinging frame; 1302. Sealing sleeve; 1303. Sliding box; 1304. Feedback circuit board; 1101. Limiting frame; 1305. Traction column; 1306. Traction link; 1307. Rising flow slot; 1308. Booster spring; 1309. Pressure plate. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Figures 1-8 As shown, the present invention provides a technical solution, the vortex flowmeter includes a circulation tube body 1, a water inlet 2 and a water outlet 3 are provided on the circulation tube body 1, a vortex forming plate 4 is provided on the circulation tube body 1, the vortex forming plate 4 is slidably connected to the circulation tube body 1, a throat channel 5 is opened in the circulation tube body 1, a pressure port 6 is provided on the water inlet 2 and the circulation tube body 1 respectively, a test tube 7 is provided between the pressure ports 6, a differential pressure transmitter 8 is provided on the test tube, a hand valve 9 is provided in each pressure port 6 respectively, an expansion groove 10 is provided in the circulation tube body 1, the vortex forming plate 4 is slidably connected to the expansion groove 10, a swing cylinder 11 is provided on the circulation tube body 1, a measuring flow meter 12 is provided on the swing cylinder 11, an eddy current detection component 13 is provided in the swing cylinder 11, and the eddy current detection component 13 is connected to the eddy current detection component 13 through a wire. The measuring flow meter 12 is electrically connected. When performing flow detection, the water flow will enter the throat channel 5 through the water inlet 2. After passing through the vortex forming plate 4, vortices will be formed on both sides of the vortex forming plate 4, so that the vortex detection component 13 can shake. After the vortex detection component 13 shakes, the sensor component in the swing cylinder 11 will generate an induced current, and the induced current enters the measuring flow meter 12, thereby completing the flow measurement. After working for a long time, the vortex detection component 13 may produce errors. In order to avoid the above-mentioned occurrence, by controlling the hand valve 9, the flowing medium enters the pressure port 6 and flows into the differential pressure transmitter 8 through the inspection tube 7. The measuring flow meter 12 will be calibrated by the differential pressure transmitter 8 to ensure the accuracy of the detection information.

[0029] A lifting cylinder 101 is provided on the circulation tube body 1, and the vortex forming plate 4 is slidably connected to the lifting cylinder 101. A lifting spring 102 is provided in the lifting cylinder 101, and the two ends of the lifting spring 102 respectively press against the lifting cylinder 101 and the vortex forming plate 4. A sealing component 103 is provided on the lifting cylinder 101, and the vortex forming plate 4 passes through the sealing component 103 and is slidably connected to the sealing component 103. When the flow velocity of the flowing medium is large, the vortex forming plate 4 will change according to the specific flow velocity, and the lifting spring 102 will press against the vortex forming plate 4, so that the vortex forming plate 4 can be reset in time, and the sealing component 103 can prevent the flowing medium from flowing into the lifting cylinder 101, thereby extending the service life of the equipment.

[0030] The flow tube body 1 is provided with an induction frame 104, and a wedge plate 105 is provided on the induction frame 104, and the wedge plate 105 is slidably connected to the induction frame 104. A traction spring 106 is provided on the wedge plate 105, and the traction spring 106 is connected to the induction frame 104. A toggle frame 107 is provided on the wedge plate 105, and the toggle frame 107 is slidably connected to the vortex forming plate 4. A smooth slide rail 108 is provided in the induction frame 104, and the wedge plate 105 is in continuous contact with the smooth slide rail 108. When the flow rate is fast, Under the action of the wedge plate 105, the induction frame 104 will be driven to move, and the toggle frame 107 will also move downward. The toggle frame 107 will drive the vortex plate 401 to move downward, and the smooth slide rail 108 will limit the moving direction and progress of the toggle frame 107. After moving downward, the vortex plate 401 will contact the expansion groove 10, thereby causing the vortex plate 401 to deform. When the flow rate is slow, it will be reset under the action of the lifting spring 102 and the traction spring 106.

[0031] A vortex plate 401 and a vortex sub-plate 402 are provided on the vortex forming plate 4, and the vortex plate 401 and the vortex sub-plate 402 are rotatably connected. A composite spring group 403 is provided between the vortex plate 401 and the vortex sub-plate 402, and the two ends of the composite spring group 403 are respectively pressed against the vortex plate 401 and the vortex sub-plate 402. The vortex plate 401 and the vortex sub-plate 402 are respectively in sliding contact with the expansion groove 10. After the vortex plate 401 moves, the expansion grooves 10 on both sides of the vortex plate 401 are in contact, thereby increasing the speed of the vortex generated on both sides of the vortex plate 401, and making the vortices on both sides of the vortex more uniform, avoiding the problem of unstable flow rate causing untimely swing response, and the composite spring group 403 will always pull the vortex sub-plates 402 on both sides, reducing the pressure of the vortex detection component 13, so that the vortex sub-plate 402 can be reset in time.

[0032] The expansion tank 10 includes an expansion frame 1001 and a baffle plate 1002. The expansion frame 1001 is arranged in the circulation tube body 1, and the baffle plate 1002 is arranged on the expansion frame 1001. The vortex plate 401 and the vortex sub-plate 402 are in sliding contact with the two sides of the expansion frame 1001 respectively. Vortex forming frames 1003 are respectively provided on both sides of the baffle plate 1002. The vortex forming frame 1003 is connected to the baffle plate 1002. After the vortex plate 401 moves downward, the vortex sub-plate 402 will also be against the vortex forming frame 1003, and the vortex forming frame 1003 will be supported, so that the vortex forming frame 1003 rises upward, increasing the range of vortex formation, thereby avoiding the error problem caused by insufficient vortex force caused by expansion.

[0033] The eddy current detection assembly 13 includes a swing frame 1301, which is rotatably connected to the flow tube body 1 through a rotating shaft. The flow tube body 1 is provided with a sealing sleeve 1302, which is sleeved on the swing frame 1301. A sliding box 1303 is provided in the swing cylinder 11. The end of the swing frame 1301 away from the flow tube body 1 is slidably connected to the sliding box 1303. The sliding box 1303 is provided with a feedback circuit board 1304. The feedback circuit board 1304 is connected to the flow meter 12 through a wire. Electrical connection. When the eddy current is formed, it will pass through both sides of the swing frame 1301, thereby driving the swing frame 1301 to swing. The swing frame 1301 swings in the swing cylinder 11. The swing frame 1301 will slide in the sliding box 1303, thereby contacting the feedback circuit board 1304, generating a changing current, and transmitting the current to the measuring flow meter 12, thereby completing the measurement. The sealing sleeve 1302 can ensure that the feedback circuit board 1304 will not be corroded by water.

[0034] A limiting frame 1101 is provided in the swing cylinder 11, and the swing frame 1301 is embedded in the limiting frame 1101 and is slidingly connected to the limiting frame 1101. A traction column 1305 is provided on the circulation tube body 1, and a traction link 1306 is provided in the traction column 1305. The traction link 1306 is connected to the swing frame 1301 at one end away from the traction column 1305. The traction column 1305 is rotatably connected to the traction link 1306. An upflow groove 1307 is provided at the bottom end of the traction link 1306. The limiting frame 1101 limits the moving trajectory of the swing frame 1301, so that the swing frame 1301 can withstand greater impact. The setting of the traction link 1306 can also increase the pressure that the swing frame 1301 can withstand. At the same time, the traction link 1306 can also maintain the formation time of the eddy current, thereby increasing the accuracy of the induced eddy current.

[0035] A boosting spring 1308 and a pressure plate 1309 are provided in the upflow trough 1307. The two ends of the boosting spring 1308 respectively press against the pressure plate and the upflow trough 1307. A plurality of guide ports are provided at the bottom end of the traction column 1305. An anti-reverse ring 301 is provided on the water outlet 3. An anti-reverse net 302 is covered on the anti-reverse ring 301. The inner surface of the anti-reverse ring 301 is a wedge surface. When the traction link 1306 swings, the upflow trough 1307 will also swing accordingly, and the upflow trough 1307 will collect the flowing medium. The pressure plate 1309 will retract into the upflow trough 1307 and complete the pressure accumulation under the action of the boosting spring 1308. Then, when the upflow trough 1307 drops, the boosting spring 1308 will release the elastic force, driving the pressure plate 1309 to move. The pressure plate 1309 will discharge the internal flowing medium and spray it toward the swing frame 1301, thereby flushing the swing frame 1301.

[0036] A flow stabilizer 201 is provided on the water inlet 2, and the flow stabilizer 201 includes a flow stabilizing ring 202. A plurality of drainage ports 203 are provided on the flow stabilizing ring 202, and a drainage pipe 204 is provided on each drainage port 203. Each drainage pipe 204 is communicated with the drainage port 203. A plurality of downstream blades 205 are provided on the flow stabilizing ring 202, and each downstream blade 205 is rotatably connected to the flow stabilizing ring 202. The downstream blade 205 is located in the flow stabilizing ring 202 and is provided with a swing block 206. Each swing block 206 is in sliding contact with the corresponding drainage pipe 204. A plurality of buffer springs 207 are provided in the flow stabilizing ring 202, and each downstream blade 205 is rotatably connected to the flow stabilizing ring 202. Each buffer spring 207 is respectively against the corresponding drainage pipe 204. After the flow medium flows through the flow stabilizer 201, it will flow into the drainage pipe 204 from the drainage port 203, and the downstream blade 205 will swing along the direction of the water flow, thereby driving the swing block 206 to rotate. After the swing block 206 rotates, it squeezes the drainage pipe 204. The drainage pipe 204 will spray out the flow medium in the direction of the water vortex, thereby destroying the rotating vortex. The buffer spring 207 is responsible for resetting the drainage pipe 204. The destroyed vortex will flow into the throat channel 5 in a straight direction, fully reducing the degree to which the rotating water flow affects the formation of the vortex.

[0037] Working principle: water will enter the throat channel 5 through the water inlet 2. After the flowing medium flows through the flow stabilizer 201, it will flow into the drainage pipe 204 from the drainage port 203, and the downstream blade 205 will swing along the direction of the water flow, thereby driving the swing block 206 to rotate. After the swing block 206 rotates, it squeezes the drainage pipe 204, and the drainage pipe 204 will spray out the flowing medium in the direction of the water vortex. After passing through the vortex forming plate 4, vortices will be formed on both sides of the vortex forming plate 4, so that the vortex detection component 13 can shake. Under the action of the wedge plate 105, the sensing frame 104 will be driven to move, and the toggle frame 107 will also move accordingly. The toggle frame 107 will drive the vortex plate 401 to move. After the vortex plate 401 moves downward, the vortex sub-plate 402 will also rest on the vortex forming frame 1003. After the component 13 shakes, the swing frame 1301 swings in the swing cylinder 11, and the swing frame 1301 will slide in the sliding box 1303, thereby contacting the feedback circuit board 1304, generating a changing current, and transmitting the current to the measuring flow meter 12. The swing frame 1301 will also drive the traction link 1306 to swing, and the rising flow groove 1307 will also swing accordingly. The rising flow groove 1307 will collect the flowing medium and release it in time, and the induced current enters the measuring flow meter 12, thereby completing the flow measurement. During calibration, by controlling the hand valve 9, the flowing medium enters the pressure port 6 and flows into the differential pressure transmitter 8 through the inspection tube 7. The information detected by the differential pressure transmitter 8 will be transmitted to the measuring flow meter 12, and the measuring flow meter 12 will be calibrated according to the transmitted information to ensure the accuracy of the detection information.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A Venturi vortex flowmeter capable of online calibration, characterized by: The vortex flowmeter comprises a circulation tube body (1), the circulation tube body (1) is provided with a water inlet (2) and a water outlet (3), the circulation tube body (1) is provided with a vortex forming plate (4), the vortex forming plate (4) is slidably connected to the circulation tube body (1), a throat passage (5) is opened in the circulation tube body (1), the water inlet (2) and the circulation tube body (1) are respectively provided with pressure ports (6), a test tube (7) is provided between the pressure ports (6), and a differential pressure gauge is provided on the test tube. A transmitter (8), wherein each of the pressure-taking ports (6) is provided with a hand valve (9), an expansion groove (10) is provided in the circulation tube body (1), the vortex-forming plate (4) is slidably connected to the expansion groove (10), a swing cylinder (11) is provided on the circulation tube body (1), a measuring flow meter (12) is provided on the swing cylinder (11), an eddy current detection component (13) is provided in the swing cylinder (11), and the eddy current detection component (13) is electrically connected to the measuring flow meter (12) via a wire; A vortex plate (401) and a vortex sub-plate (402) are provided on the vortex forming plate (4), the vortex plate (401) and the vortex sub-plate (402) are rotatably connected, a composite spring group (403) is provided between the vortex plate (401) and the vortex sub-plate (402), two ends of the composite spring group (403) respectively press against the vortex plate (401) and the vortex sub-plate (402), and the vortex plate (401) and the vortex sub-plate (402) respectively make sliding contact with the expansion groove (10); The expansion slot (10) comprises an expansion frame (1001) and a baffle plate (1002), wherein the expansion frame (1001) is arranged in the circulation tube body (1), and the baffle plate (1002) is arranged on the expansion frame (1001), and the vortex plate (401) and the vortex sub-plate (402) are in sliding contact with both sides of the expansion frame (1001), and vortex forming frames (1003) are respectively arranged on both sides of the baffle plate (1002), and the vortex forming frames (1003) are connected to the baffle plate (1002).

2. The online calibrated Venturi vortex flowmeter according to claim 1, characterized in that: A lifting cylinder (101) is provided on the circulation tube body (1), the vortex forming plate (4) is slidably connected to the lifting cylinder (101), a lifting spring (102) is provided in the lifting cylinder (101), two ends of the lifting spring (102) respectively press against the lifting cylinder (101) and the vortex forming plate (4), a sealing component (103) is provided on the lifting cylinder (101), and the vortex forming plate (4) passes through the sealing component (103) and is slidably connected to the sealing component (103).

3. The online calibrated Venturi vortex flowmeter according to claim 2, characterized in that: An induction frame (104) is provided in the circulation tube body (1), a wedge plate (105) is provided on the induction frame (104), the wedge plate (105) is slidably connected to the induction frame (104), a traction spring (106) is provided on the wedge plate (105), the traction spring (106) is connected to the induction frame (104), a toggle frame (107) is provided on the wedge plate (105), the toggle frame (107) is slidably connected to the vortex forming plate (4), a smooth slide rail (108) is provided in the induction frame (104), and the wedge plate (105) is in continuous contact with the smooth slide rail (108).

4. The online calibrated Venturi vortex flowmeter according to claim 1, characterized in that: The eddy current detection assembly (13) includes a swing frame (1301), the swing frame (1301) is rotatably connected to the circulation tube body (1) via a rotating shaft, a sealing sleeve (1302) is provided on the circulation tube body (1), and the sealing sleeve (1302) is sleeved on the swing frame (1301), a sliding box (1303) is provided in the swing cylinder (11), and the end of the swing frame (1301) away from the circulation tube body (1) is slidably connected to the sliding box (1303), and a feedback circuit board (1304) is provided in the sliding box (1303), and the feedback circuit board (1304) is electrically connected to the measuring flow meter (12) via a wire.

5. The online calibrated Venturi vortex flowmeter according to claim 4, characterized in that: A limiting frame (1101) is provided in the swing cylinder (11), the swing frame (1301) is embedded in the limiting frame (1101) and is slidably connected to the limiting frame (1101), a traction column (1305) is provided on the circulation tube body (1), a traction link (1306) is provided in the traction column (1305), the traction link (1306) is connected to the swing frame (1301) at one end away from the traction column (1305), the traction column (1305) is rotatably connected to the traction link (1306), and a rising flow trough (1307) is provided at the bottom end of the traction link (1306).

6. The online calibrated Venturi vortex flowmeter according to claim 5, characterized in that: A pressure-boosting spring (1308) and a pressure plate (1309) are provided in the rising flow trough (1307), and the two ends of the pressure-boosting spring (1308) respectively abut against the pressure plate (1309) and the rising flow trough (1307). A plurality of diversion ports are provided at the bottom end of the traction column (1305), and an anti-reverse ring (301) is provided on the water outlet (3). An anti-reverse net (302) is sleeved on the anti-reverse ring (301), and the inner surface of the anti-reverse ring (301) is a wedge surface.

7. The online calibrated Venturi vortex flowmeter according to claim 1, characterized in that: The water inlet (2) is provided with a flow stabilizer (201), the flow stabilizer (201) comprising a flow stabilizing ring (202), a plurality of drainage ports (203) provided on the flow stabilizing ring (202), a drainage pipe (204) provided on each drainage port (203), and each drainage pipe (204) being in communication with the drainage port (203). The flow stabilizing ring (202) is provided with a plurality of downstream blades (205), each downstream blade (205) being rotatably connected to the flow stabilizing ring (202), and a swing block (206) being provided on the downstream blade (205) located inside the flow stabilizing ring (202), each swing block (206) being in sliding contact with a corresponding drainage pipe (204). A plurality of buffer springs (207) are provided inside the flow stabilizing ring (202), and each buffer spring (207) is respectively pressed against a corresponding drainage pipe (204).

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