Venturi vortex shedding flowmeter capable of being verified on line

Abstract

The invention discloses a venturi vortex shedding flowmeter capable of being verified on line, and relates to the technical field of flowmeters.The vortex shedding flowmeter comprises a runner pipe body, a water inlet and a water outlet are formed in the runner pipe body, a vortex forming plate is arranged on the runner pipe body, the vortex forming plate is in sliding connection with the runner pipe body, a throat channel is formed in the runner pipe body, and the water inlet and the water outlet are communicated with the throat channel. The water inlet and the circulation pipe body are respectively provided with a pressure tapping port, an inspection pipe is arranged between the pressure tapping ports, a differential pressure transmitter is arranged on the inspection pipe, a hand valve is arranged in each pressure tapping port, an expansion groove is formed in the circulation pipe body, the vortex forming plate is connected with the expansion groove in a sliding mode, and a swing cylinder is arranged on the circulation pipe body. A flow measuring meter is arranged on the swing cylinder, an eddy current detection assembly is arranged in the swing cylinder and electrically connected with the flow measuring meter through a wire, and the multi-flow-velocity flow meter has the functions of adapting to multi-flow-velocity detection and improving the detection precision.

Description

Technical Field

[0001] The invention relates to the technical field of flowmeters, in particular to a Venturi vortex flowmeter capable of being calibrated online. 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 effect of different types of flow meters be brought into play. For example, vortex flowmeter is used for flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large measuring range and high accuracy. When measuring the working volume flow, it is almost not affected by parameters such as fluid density, pressure, temperature and viscosity.

[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-mentioned characteristics, but also makes the measurement accuracy more precise. However, if it is used for a long time, it will also cause fatigue errors of 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] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: the vortex flowmeter includes a circulation tube body, a water inlet and a water outlet are arranged on the circulation tube body, a vortex forming plate is arranged 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 arranged on the water inlet and the circulation tube body, a test tube is arranged between the pressure taking ports, a differential pressure transmitter is arranged on the test tube, a hand valve is arranged in each pressure taking port, an expansion groove is arranged in the circulation tube body, the vortex forming plate is slidably connected to the expansion groove, a swing cylinder is arranged on the circulation tube body, a measuring flow meter is arranged on the swing cylinder, an eddy current detection component is arranged 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 resist 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 resist 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 arranged in the circulation tube body, and a wedge plate is arranged on the induction frame, the wedge plate is slidably connected to the induction frame, a traction spring is arranged on the wedge plate, the traction spring is connected to the induction frame, a toggle frame is arranged on the wedge plate, the toggle frame is slidably connected to the vortex forming plate, a smooth slide rail is arranged in the induction frame, the wedge plate is in continuous contact with the smooth slide rail, when the flow velocity is faster, under the action of the wedge plate, the induction frame will be driven to move, 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 with the expansion groove, thereby causing the vortex plate to deform, and when the flow velocity is slower, 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 arranged on the vortex forming plate, the vortex plate and the vortex sub-plate are rotatably connected, a composite spring group is arranged between the vortex plate and the vortex sub-plate, two ends of the composite spring group respectively press against the vortex plate and the vortex sub-plate, 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 generated 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, reduce the pressure of the eddy current detection component, and enable the vortex sub-plate to be reset in time.

[0009] The expansion groove 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 respectively in sliding contact with the two sides of the expansion frame. Vortex forming frames are respectively arranged on both sides of the baffle plate, and 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 will rise 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 flow tube body through a rotating shaft, a sealing sleeve is provided on the flow tube body, 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 flow tube body, a feedback circuit board is provided in the sliding box, 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 the swing frame will slide 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, and 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 flowing medium, 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 to drive the pressure plate to move, and the pressure plate will discharge the flowing medium inside and spray it toward the swing frame, thereby flushing the swing frame.

[0013] A flow stabilizer is arranged on the water inlet, and the flow stabilizer includes a flow stabilizer ring. A plurality of drainage ports are arranged on the flow stabilizer ring, and each drainage port is respectively provided with a drainage pipe, and each drainage pipe is respectively connected with the drainage port; a plurality of downstream blades are arranged on the flow stabilizer ring, and each downstream blade is respectively rotatably connected with the flow stabilizer ring; a swing block is arranged on the downstream blade located inside the flow stabilizer ring, and each swing block is respectively in sliding contact with the corresponding drainage pipe; a plurality of buffer springs are arranged inside the flow stabilizer ring, and 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; after the swing block rotates, it squeezes the drainage pipe, and the drainage pipe will spray out the flow medium in the direction of the water flow vortex, thereby destroying the rotating vortex; the buffer spring is responsible for resetting the drainage pipe, and 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 vortices 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. In the process of detection, 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, thereby reducing corrosion caused by 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 medium eddy currents caused by eddy currents in the flowing medium and the problem of eddy current backflow, and can more accurately detect the volume and flow of the medium. 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 It is a schematic diagram of the structure of the circulation pipe body of the present invention;

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

[0021] Figure 4 for Figure 2 The structural schematic diagram of the partial enlargement of B in the middle;

[0022] Figure 5 It is a schematic diagram of the structure 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 A partial cross-sectional structural diagram of the traction link of the present invention

[0026] In the figure: 1. circulation tube body; 101. lifting cylinder; 102. lifting spring; 103; sealing assembly; 104. induction frame; 105. wedge plate; 106. traction spring; 107. toggle frame; 108. smooth slide 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 street plate; 402. vortex street 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. swing cylinder; 12. flow meter; 13. eddy current detection assembly; 1301. swing frame; 1302. sealing sleeve; 1303. sliding box; 1304. feedback circuit board; 1101. limiting frame; 1305. traction column; 1306. traction connecting rod; 1307. rising flow slot; 1308. boost spring; 1309. pressure plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] Example: Figure 1-Figure 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 arranged on the circulation tube body 1, a vortex forming plate 4 is arranged 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, pressure ports 6 are respectively arranged on the water inlet 2 and the circulation tube body 1, a test tube 7 is arranged between the pressure ports 6, a differential pressure transmitter 8 is arranged on the test tube, a hand valve 9 is respectively arranged in each pressure port 6, an expansion groove 10 is arranged in the circulation tube body 1, the vortex forming plate 4 is slidably connected to the expansion groove 10, a swing cylinder 11 is arranged on the circulation tube body 1, a measuring flow meter 12 is arranged on the swing cylinder 11, an eddy current detection component 13 is arranged in the swing cylinder 11, and the eddy current detection component 13 is connected to the expansion groove 10 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, the hand valve 9 is controlled to allow the flowing medium to enter the pressure taking port 6 and flow 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, and a traction spring 106 is provided on the wedge plate 105, and the traction spring 106 is connected to the induction frame 104, and 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, and 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 against the vortex plate 401 and the vortex sub-plate 402, and 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 vortex generation 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, reduce the pressure of the vortex detection component 13, and enable the vortex sub-plates 402 to be reset in time.

[0032] The expansion slot 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 respectively in sliding contact with the two sides of the expansion frame 1001. Vortex forming frames 1003 are respectively arranged 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, a sealing sleeve 1302 is provided on the flow 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 flow tube body 1 is slidably connected to the sliding box 1303. A feedback circuit board 1304 is provided in the sliding box 1303, and 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, and 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, and 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 slidably 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 rotationally connected to the traction link 1306, and a rising flow 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 impacts. 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, and the two ends of the boosting spring 1308 respectively resist the pressure plate and the upflow trough 1307, a plurality of guide ports are provided at the bottom of the traction column 1305, and an anti-reverse ring 301 is provided on the water outlet 3, and 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. When the traction link 1306 swings, the upflow trough 1307 will also swing accordingly, and the upflow trough 1307 will collect the flowing medium, and the pressure plate 1309 will retract into the upflow trough 1307 and complete the pressure accumulation under the action of the boosting spring 1308, and then when the upflow trough 1307 drops, the boosting spring 1308 will release the elastic force to drive the pressure plate 1309 to move, and 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] The water inlet 2 is provided with a flow stabilizer 201, which includes a flow stabilizer ring 202. The flow stabilizer ring 202 is provided with a plurality of drainage ports 203, each of which is provided with a drainage pipe 204, each of which is communicated with the drainage port 203, and the flow stabilizer ring 202 is provided with a plurality of downstream blades 205, each of which is rotatably connected to the flow stabilizer ring 202, and the downstream blades 205 are located in the inner part of the flow stabilizer ring 202 and are provided with swing blocks 206, each of which is in sliding contact with the corresponding drainage pipe 204, and a plurality of buffer springs 207 are provided in the flow stabilizer ring 202, each of which is in sliding contact with the corresponding drainage pipe 204, and a plurality of buffer springs 207 are provided in the flow stabilizer ring 202. The buffer springs 207 are respectively against the corresponding drainage pipes 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 blades 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 flow into 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. 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 slot 1307 will also swing accordingly. The rising flow slot 1307 will collect the flowing medium and release it in time. The induced current enters the measuring flow meter 12, thereby completing the flow measurement. During the calibration, the hand valve 9 is controlled to allow the flowing medium to enter the pressure port 6 and flow 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 invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A Venturi vortex flowmeter capable of online calibration, characterized in that: The vortex flowmeter comprises a flow tube body (1), the flow tube body (1) is provided with a water inlet (2) and a water outlet (3), the flow tube body (1) is provided with a vortex forming plate (4), the vortex forming plate (4) is slidably connected to the flow tube body (1), a throat passage (5) is provided in the flow tube body (1), the water inlet (2) and the flow 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 (5) is provided on the test tube. A transmitter (8), each of the pressure tapping 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) through a wire.

2. The Venturi vortex flowmeter capable of online verification according to claim 1, characterized in that: A lifting cylinder (101) is arranged on the circulation tube body (1), the vortex forming plate (4) is slidably connected to the lifting cylinder (101), a lifting spring (102) is arranged inside the lifting cylinder (101), two ends of the lifting spring (102) respectively abut against the lifting cylinder (101) and the vortex forming plate (4), a sealing component (103) is arranged 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 Venturi vortex flowmeter capable of online verification according to claim 2, characterized in that: The circulation tube body (1) is provided with a sensing frame (104), the sensing frame (104) is provided with a wedge plate (105), the wedge plate (105) is slidably connected to the sensing frame (104), the wedge plate (105) is provided with a traction spring (106), the traction spring (106) is connected to the sensing frame (104), the wedge plate (105) is provided with a toggle frame (107), the toggle frame (107) is slidably connected to the vortex forming plate (4), the sensing frame (104) is provided with a smooth slide rail (108), the wedge plate (105) is in continuous contact with the smooth slide rail (108).

4. The Venturi vortex flowmeter capable of online calibration according to claim 1, characterized in that: A vortex plate (401) and a vortex sub-plate (402) are arranged 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 arranged between the vortex plate (401) and the vortex sub-plate (402); two ends of the composite spring group (403) respectively abut against the vortex plate (401) and the vortex sub-plate (402); and the vortex plate (401) and the vortex sub-plate (402) are respectively in sliding contact with the expansion groove (10).

5. The Venturi vortex flowmeter capable of online verification according to claim 4, characterized in that: The expansion slot (10) comprises an expansion frame (1001) and a baffle plate (1002); the expansion frame (1001) is arranged in the flow tube body (1); the baffle plate (1002) is arranged on the expansion frame (1001); the vortex plate (401) and the vortex sub-plate (402) are respectively in sliding contact with two sides of the expansion frame (1001); vortex forming frames (1003) are respectively arranged on two sides of the baffle plate (1002); and the vortex forming frames (1003) are connected to the baffle plate (1002).

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

7. The Venturi vortex flowmeter capable of online verification according to claim 6, characterized in that: The swing cylinder (11) is provided with a limiting frame (1101), the swing frame (1301) is embedded in the limiting frame (1101) and is slidably connected to the limiting frame (1101), the circulation tube body (1) is provided with a traction column (1305), 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).

8. The Venturi vortex flowmeter capable of online verification according to claim 7, characterized in that: A pressure-boosting spring (1308) and a pressure plate (1309) are arranged in the upflow groove (1307), and two ends of the pressure-boosting spring (1308) respectively abut against the pressure plate (1309) and the upflow groove (1307). A plurality of flow guide ports are arranged at the bottom end of the traction column (1305). An anti-reverse ring (301) is arranged on the water outlet (3), and an anti-reverse net (302) is sleeved on the anti-reverse ring (301). The inner surface of the anti-reverse ring (301) is a wedge surface.

9. The online calibrable 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), the flow stabilizing ring (202) being provided with a plurality of drainage ports (203), each drainage port (203) being provided with a drainage pipe (204), each drainage pipe (204) being communicated with the drainage port (203), the flow stabilizing ring (202) being provided with a plurality of downstream blades (205), each downstream blade (205) being rotationally connected to the flow stabilizing ring (202), the downstream blade (205) being provided with a swing block (206) located inside the flow stabilizing ring (202), each swing block (206) being in sliding contact with a corresponding drainage pipe (204), and a plurality of buffer springs (207) being provided inside the flow stabilizing ring (202), each buffer spring (207) being respectively pressed against a corresponding drainage pipe (204).

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