Quality testing equipment for swirl flowmeter

Abstract

The present invention provides a quality inspection device for a swirl flowmeter, and relates to the field of flowmeter inspection technology. The quality inspection device for the swirl flowmeter comprises a test bench, a medium suction pump installed at the rear side of the bottom surface of the test bench, an external gas suction pump installed at the front side of the bottom surface of the test bench, a gas three-way valve, a liquid three-way valve and an external three-way valve. A cold air box, a hot air box, a cold water tank and a hot water tank are installed on the bottom support cantilever beam of the test bench. The pipes connected to the two input ends of the gas three-way valve pass through the cold air box and the hot air box and lead to the bottom of the cold air box and the hot air box. The present invention solves the problem that the detection accuracy of the swirl flowmeter is inaccurate due to the change of medium performance during actual use. By providing different medium change modes to simulate the real scene of the swirl flowmeter when conveying the medium, it verifies whether the value of the flowmeter in complex scenes is accurate, thereby improving the factory quality of the flowmeter.

Description

Technical Field

[0001] The invention relates to the technical field of flow meter detection, in particular to quality detection equipment for a swirl flow meter. Background Art

[0002] In modern industrial production and scientific research, accurate flow measurement is crucial to ensure the accuracy and reliability of each process. As an important flow measurement tool, the swirl flowmeter plays a key role in many fields, whether in the petrochemical industry, the energy field, or scientific research experiments. The swirl flowmeter can provide high-precision flow data, which provides a solid foundation for optimizing the process and rationally allocating resources. It is also an important means to obtain reliable experimental results. The accuracy detection of the swirl flowmeter is the most critical part of quality inspection.

[0003] The existing precision detection methods of swirl flowmeters are mostly real flow calibration methods, that is, by installing the swirl flowmeter in a pipeline where the actual fluid flows, using a standard device with a known accurate flow rate (such as a standard volume tube, a standard mass flowmeter, etc.) for comparative measurement, thereby determining its accuracy. However, this method ignores the fact that during the actual use of the swirl flowmeter, the medium flowing inside is very likely to change due to external factors. For example, changes in air pressure will cause changes in the density of the fluid. The principle of the swirl flowmeter is to measure the flow rate based on the vortex precession phenomenon. When the fluid flows through the vortex generator of the flowmeter, regular vortices will be generated, and changes in density will directly affect the actual mass flow rate of the fluid, thereby causing errors in flowmeter measurement. The flow velocity and viscosity affect the generation of vortices in the swirl flowmeter from the vortex generation speed and the degree of vortex formation, respectively, resulting in errors in the swirl flowmeter detection. Based on the above viewpoints, technical personnel in this field provide quality detection equipment that can provide different medium change modes to simulate the real scene of the swirl flowmeter in the conveying medium, so as to meet the quality detection requirements for achieving high-precision swirl flowmeter anti-interference performance. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a quality inspection device for a swirl flowmeter, which solves the problem of inaccurate detection accuracy of the swirl flowmeter due to changes in medium properties during actual use. By providing different medium change modes to simulate the real scenarios of the swirl flowmeter when conveying the medium, it verifies whether the flowmeter's values ​​in complex scenarios are accurate, thereby improving the flowmeter's factory quality.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: the quality inspection equipment of the swirl flowmeter includes a test bench, a medium suction pump installed on the rear side of the bottom surface of the test bench, an external gas suction pump installed on the front side of the bottom surface of the test bench, a gas three-way valve, a liquid three-way valve and an external three-way valve. A cold air box, a hot air box, a cold water tank and a hot water tank are installed on the bottom support cantilever beam of the test bench. The gas three-way valve is installed on the cold air box. The pipes connected to the two input ends of the gas three-way valve run through the cold air box. The three-way valve is installed on the cold water tank, and the pipes connected to the two input ends of the liquid three-way valve penetrate the cold water tank and the hot water tank and pass to the bottom of the cold water tank and the hot water tank. The pipes connected to the output ends of the gas three-way valve and the liquid three-way valve are connected to the two input ends of the medium suction pump. The external three-way valve is installed on the outer side wall of the cold air box, and the pipes connected to the two input ends of the external three-way valve penetrate the cold air box and the hot air box and pass to the bottom of the cold air box and the hot air box.

[0006] A medium storage component is installed at the rear side of the top of the detection platform, and the medium storage component includes a medium storage cabin and two end covers. The two end covers are connected to the front and rear side walls of the medium storage cabin by bolts. The pipeline connected to the output end of the medium suction pump passes through the rear end cover and leads to the interior of the medium storage cabin. The end cover on the front side is connected to a closed detection component through a pipeline, and a parameter control component is arranged inside the medium storage cabin.

[0007] Preferably, the closed detection assembly includes a precision flow meter for verification, a connecting tail pipe, an external sealed cabin and a discharge tail pipe, the connecting tail pipe is connected to the output end of the precision flow meter for verification through a flange, the input end of the precision flow meter for verification is connected to the pipe of the end cover on the front side through a flange, the external sealed cabin is fixed to the outer side wall of the connecting tail pipe, the discharge tail pipe is threadedly connected to the front end of the external sealed cabin, and the pipe connected to the output end of the external gas suction pump is connected to the inner cavity of the external sealed cabin.

[0008] Preferably, a push piston cylinder is installed at the bottom of the medium storage cabin near the front side wall, and the movable end of the push piston cylinder passes through the bottom of the medium storage cabin and the parameter control component. A C-shaped drive frame is installed on the movable end of the push piston cylinder, and the C-shaped drive frame is arranged inside the parameter control component.

[0009] Preferably, the parameter control component includes a floating airbag, a thermistor groove opened on the rear side wall of the floating airbag, and a thermistor arranged inside the thermistor groove, the front side wall of the thermistor is fixedly connected to a thermistor driving rod, a spring telescopic tube is installed on the front inner wall of the floating airbag and at the same horizontal height as the thermistor driving rod, two firing pin tubes are installed at the rear end of the spring telescopic tube, the firing pin tube on the front side is located in a C-shaped driving frame, and the two firing pin tubes are connected with a driving firing pin through a spring, and the firing pin tube on the rear side is tightly fitted with the thermistor driving rod, and the tops and bottoms of the two driving firing pins are fixedly connected to driving shafts.

[0010] Preferably, a deformable membrane is fixed on the top of the floating airbag, an expansion tooth plate is fixed on the rear side below the deformable membrane, and the top of the driving shaft connected to the bottom of the driving striker on the front side is fixedly connected to a cold-end driving tooth plate, and the cold-end driving tooth plate and the expansion tooth plate are meshed and transmitted through a double set of transmission gears.

[0011] Preferably, a contraction tooth plate is installed on the front end of the lower side wall of the deformable membrane, and the top of the driving shaft connected to the bottom of the driving striker on the rear side is fixedly connected with a hot-end driving tooth plate. The hot-end driving tooth plate and the contraction tooth plate are meshed and driven by a single set of transmission gears, and the distance between the hot-end driving tooth plate and the gear is equal to the distance between the two striker tubes.

[0012] Preferably, a hook-shaped liquid flow channel is opened at the front end of the floating airbag, and the top of the liquid flow channel is connected to spring plates at the front end and the rear end through springs, and a flow channel membrane is connected to the side wall where the two spring plates are close to each other, and a shrinkage limit frame is installed on the inner side wall of the spring plate on the rear side, and the front side wall of the floating airbag is slidably connected to a cold-end spring rod through a spring limit, and a shrinkage card plate that cooperates with the shrinkage limit frame is fixed to the front end of the cold-end spring rod, and a cold-end wedge frame is fixed to the rear end of the cold-end spring rod, and the other end of the driving shaft connected to the top of the driving striker on the front side is fixedly connected to a cold-end wedge plate, and the cold-end wedge plate is used in conjunction with the cold-end wedge frame.

[0013] Preferably, an expansion limit frame is connected to the inner side wall of the spring plate on the rear side, the front side wall of the floating airbag is slidably connected to the hot end spring rod through a spring limit, the front end of the hot end spring rod is fixedly connected to an expansion clamping plate used in conjunction with the expansion limit frame, the rear side wall of the hot end spring rod is fixedly connected to a hot end wedge frame, the bottom end of the driving shaft connected to the top of the driving striker on the rear side is fixedly connected to a hot end wedge plate used in conjunction with the hot end wedge frame, and the spacing between the hot end wedge plate and the hot end wedge frame is equal to the distance between the two striker tubes.

[0014] The present invention has the following technical points and beneficial effects:

[0015] 1. The medium flowing out of the medium storage component will pass through the precision flow meter for verification and the swirl flow meter to be tested. The medium flow will be detected by the precision flow meter for verification and the swirl flow meter to be tested. At the same time, the total amount of medium injected into the pump body will be compared in three phases to further improve the accuracy of the detection.

[0016] 2. It can simulate the performance changes of gas conveying media at different temperatures, so as to detect whether the flow meter maintains accuracy under such changes. When low-temperature gas enters the medium storage component, the movable end of the piston cylinder drives the C-shaped drive frame to rise, and drives the striker to drive the expansion tooth plate to rise, thereby causing the deformable membrane to deform upward, narrowing the path of the airflow, and increasing the air pressure of the airflow medium passing through, simulating the situation of increased air pressure of low-temperature gas during transportation. When the high-temperature medium is sent into the medium storage cabin, the thermal sensitive component senses the temperature change and deforms inward, and the piston cylinder drives the C-shaped drive frame to move, and then drives the contraction tooth plate to descend through a single set of gears, so that the air pressure passing through this place is reduced, simulating the situation of reduced air pressure of high-temperature gas.

[0017] 3. It can simulate the performance changes of liquid conveying media at different temperatures. When the liquid is injected into the medium storage component, the liquid drives the floating airbag to float up, and the floating airbag blocks the output hole on the front side of the end cover, so that the liquid can only be discharged from the liquid flow channel. After the low-temperature liquid is injected into the medium storage compartment, the piston cylinder drives the C-shaped drive frame to descend, and the spring plate on the rear side moves closer to the spring plate on the front side, so that more wrinkles appear on the inner wall of the flow channel membrane, and the fluid speed passing through the flow channel membrane is reduced, simulating the situation when the flow rate of the low-temperature liquid is reduced. When the high-temperature fluid is pumped into the medium storage compartment, the thermal sensitive part deforms inward, and the striker tube on the rear side moves to the C-shaped drive frame. Then the piston cylinder drives the C-shaped drive frame to descend, so that the spring plate on the rear side is away from the expansion limit frame on the front side, and the wrinkles of the flow channel membrane become smooth, so that the flow rate of the high-temperature fluid increases when passing through.

[0018] In summary, the detection equipment provides different medium change modes to simulate the real scenarios of the swirl flowmeter when conveying medium through the coordinated cooperation of hot and cold air boxes, hot and cold water tanks, parameter control components and closed detection components, and verifies whether the flowmeter's values ​​are accurate in complex scenarios, thereby improving the factory quality of the flowmeter. At the same time, the three-way valve can quickly switch fluids of different temperatures to achieve the accuracy of the swirl flowmeter under rapid temperature change conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 is an axonometric view of the present invention;

[0021] Figure 3 It is a bottom schematic diagram of the present invention;

[0022] Figure 4 It is a partial exploded view of the present invention;

[0023] Figure 5 is a cross-sectional view of the present invention;

[0024] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0025] Figure 7 for Figure 6 The enlarged schematic diagram of the center C;

[0026] Figure 8 for Figure 6 The enlarged schematic diagram of point D in the middle;

[0027] Fig. 9 for Figure 6 The enlarged schematic diagram of point E in the middle;

[0028] Fig.10 for Figure 6 Enlarged schematic diagram of point F in the middle.

[0029] Among them, 1. test bench; 2. cold air box; 3. hot air box; 4. cold water tank; 5. hot water tank; 6. medium storage component; 7. closed detection component; 8. gas three-way valve; 9. liquid three-way valve; 10. external three-way valve; 11. medium suction pump; 12. external gas suction pump; 13. parameter control component; 14. top piston cylinder; 15. C-shaped drive frame;

[0030] Medium storage compartment; 62, end cover;

[0031] Precision flow meter for verification; 72. Connecting tail pipe; 73. External sealed cabin; 74. Discharge tail pipe;

[0032] 131. floating airbag; 132. thermal groove; 133. thermal component; 134. thermal drive rod; 135. spring telescopic tube; 136. striker tube; 137. drive striker; 138. drive shaft; 139. deformation membrane; 1310. expansion tooth plate; 1311. cold end drive tooth plate; 1312. hot end drive tooth plate; 1313. contraction tooth plate; 1314. liquid flow channel; 1315. spring plate; 1316. flow channel membrane; 1317. contraction limit frame; 1318. contraction card plate; 1319. expansion limit frame; 1320. expansion card plate; 1321. hot end wedge plate; 1322. cold end wedge plate; 1323. cold end wedge frame; 1324. hot end wedge frame; 1325. cold end spring rod; 1326. hot end spring rod. DETAILED DESCRIPTION

[0033] 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.

[0034] Embodiment 1: Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a quality inspection device for a swirl flowmeter, comprising a test bench 1, a medium suction pump 11 installed on the bottom surface of the test bench 1 at a rear side position, an external gas suction pump 12 installed on the bottom surface of the test bench 1 at a front side position, a gas three-way valve 8, a liquid three-way valve 9 and an external three-way valve 10, a cold air box 2, a hot air box 3, a cold water tank 4 and a hot water tank 5 are installed on the bottom support suspension beam of the test bench 1, the gas three-way valve 8 is installed on the cold air box 2, the pipes connected to the two input ends of the gas three-way valve 8 pass through the cold air box 2 and the hot air box 3 and lead to the bottom of the cold air box 2 and the hot air box 3, the liquid three-way valve 9 is installed on the cold water tank 4, and the liquid The pipes connected to the two input ends of the three-way valve 9 pass through the cold water tank 4 and the hot water tank 5 and reach the bottom of the cold water tank 4 and the hot water tank 5. The pipes connected to the output ends of the gas three-way valve 8 and the liquid three-way valve 9 are connected to the two input ends of the medium suction pump 11. The external three-way valve 10 is installed on the outer wall of the cold air box 2. The pipes connected to the two input ends of the external three-way valve 10 pass through the cold air box 2 and the hot air box 3 and reach the bottom of the cold air box 2 and the hot air box 3. By providing different medium change modes to simulate the real scene of the swirl flowmeter when conveying the medium, it is verified whether the value of the flowmeter is accurate in complex scenes, thereby improving the factory quality of the flowmeter.

[0035] like Figure 4 and Figure 5As shown, a medium storage component 6 is installed at the rear side of the top of the test bench 1, and the medium storage component 6 includes a medium storage cabin 61 and two end covers 62. The two end covers 62 are connected to the front and rear side walls of the medium storage cabin 61 by bolts. The pipeline connected to the output end of the medium suction pump 11 passes through the rear end cover 62 and leads to the interior of the medium storage cabin 61. The front end cover 62 is connected to a closed detection component 7 through a pipeline. The interior of the medium storage cabin 61 is provided with a parameter control component 13. The closed detection component 7 includes a precision flow meter 71 for verification, a connecting tail pipe 72, an outer sealed cabin 73 and a discharge tail pipe 74. The connecting tail pipe 72 is connected to the output end of the precision flow meter 71 for verification through a flange, and the input end of the precision flow meter 71 for verification is connected to the pipeline of the end cover 62 on the front side through a flange. The outer sealed cabin 73 is fixed to the outer side wall of the connecting tail pipe 72. 4 is threadedly connected to the full end of the outer sealed cabin 73, and the pipeline connected to the output end of the external gas suction pump 12 is connected to the inner cavity of the outer sealed cabin 73. Before the detection, the swirl flowmeter to be tested is placed in the outer sealed cabin 73 and connected to the front end flange of the connecting tail pipe 72, and then the discharge tail pipe 74 is screwed into the connecting tail pipe 72 until the rear end of the discharge tail pipe 74 is in close contact with the front end of the flowmeter to be tested, and then the external gas suction pump 12 is turned on, and the high-temperature gas or low-temperature gas is selected to be sucked into the closed detection component 7 through the external three-way valve 10 to simulate the external temperature of the flowmeter under the real industrial control. The medium flowing out of the medium storage component 6 will pass through the checking precision flowmeter 71 and the swirl flowmeter to be tested, and the checking precision flowmeter 71 and the swirl flowmeter to be tested will detect the medium flow, and at the same time, the total amount of medium injected into the pump body will be compared in three phases to further improve the accuracy of the detection.

[0036] Embodiment 2: Figure 5 , Figure 6 and Figure 7 As shown, the technicians in this field provide another technical solution based on the first embodiment, a push piston cylinder 14 is installed at the bottom of the medium storage cabin 61 close to the front side wall, the movable end of the push piston cylinder 14 passes through the bottom of the medium storage cabin 61 and the parameter control component 13, a C-shaped drive frame 15 is installed on the movable end of the push piston cylinder 14, and the C-shaped drive frame 15 is arranged inside the parameter control component 13, the push piston cylinder 14 drives the C-shaped drive frame 15 to move up and down, and then knocks the drive pin 137 to rise and fall.

[0037] like Figure 5 , Figure 6 , Figure 7 and Figure 8The parameter control component 13 shown includes a floating airbag 131, a thermal groove 132 opened on the rear side wall of the floating airbag 131, and a thermal component 133 arranged inside the thermal groove 132. The thermal component 133 is preferably a bimetallic sheet. The thermal expansion coefficients of the two metal sheets are different and can be deformed inward at high temperature. The front side wall of the thermal component 133 is fixedly connected to a thermal drive rod 134. A spring telescopic tube 135 is installed on the front inner wall of the floating airbag 131 and at the same horizontal height as the thermal drive rod 134. Two firing pin tubes 136 are installed at the rear end of the spring telescopic tube 135. The firing pin tube 136 on the front side is located in the C-shaped drive frame 15. The two firing pin tubes 136 are connected to a driving firing pin 137 through a spring. The firing pin tube 136 on the rear side is connected to the thermal drive rod 134. The movable rod 134 fits tightly, and the top and bottom of the two driving strikers 137 are fixedly connected with the driving shaft 138, and the top of the floating airbag 131 is fixed with a deformation membrane 139, and the lower rear side of the deformation membrane 139 is fixed with an expansion tooth plate 1310, and the top of the driving shaft 138 connected to the bottom of the driving striker 137 on the front side is fixedly connected with a cold end driving tooth plate 1311, and the cold end driving tooth plate 1311 and the expansion tooth plate 1310 are meshed through a double set of transmission gears. A contraction tooth plate 1313 is installed on the lower side wall of the deformation membrane 139 near the front end, and the top of the driving shaft 138 connected to the bottom of the driving striker 137 on the rear side is fixedly connected with a hot end driving tooth plate 1312, and the hot end driving tooth plate 1312 and the contraction tooth plate 1313 realizes meshing transmission through a single set of transmission gears. The distance between the hot end driving tooth plate 1312 and the gear is equal to the distance between the two striker tubes 136. A hook-shaped liquid flow channel 1314 is provided at the front end of the floating airbag 131. High-temperature gas or low-temperature gas is selectively introduced into the medium storage component 6. When the low-temperature gas enters the medium storage component 6, the movable end of the push piston cylinder 14 drives the C-shaped driving frame 15 to rise, and then the bottom of the C-shaped driving frame 15 is used to knock and impact the driving striker 137 on the front side. The driving striker 137 on the front side drives the cold end driving tooth plate 1311 to rise through the driving shaft 138 at the bottom, and then drives the expansion tooth plate 1310 to rise through the double set of transmission gears, thereby causing the deformation membrane 139 to deform upward. , which makes the path through which the airflow passes narrower, and increases the air pressure of the airflow medium passing through, simulating the situation in which the air pressure of the low-temperature gas increases during transportation. When the high-temperature medium is sent into the medium storage cabin 61, due to the increase in the cavity temperature of the medium storage cabin 61, the thermal sensitive element 133 senses the temperature change and deforms inward, driving the thermal driving rod 134 to move. The thermal driving rod 134 drives the rear driving shaft 138 to move into the C-shaped driving frame 15 and compresses the spring expansion tube 135. At the same time, the hot end driving tooth plate 1312 is meshed with the transmission gear. Subsequently, when the top piston cylinder 14 drives the C-shaped driving frame 15 to move, it will strike the driving striker 137 on the rear side, and then drive the hot end driving tooth plate 1312 to rise through the driving shaft 138 at the bottom of the driving striker 137.Then, the contraction tooth plate 1313 is driven downward by a single set of gears, so that the air pressure passing through this place is reduced, simulating the situation where the high-temperature gas pressure is reduced.

[0038] like Figure 5 , Figure 6 , Fig. 9 and Fig.10As shown, the top of the liquid flow channel 1314 is connected to a spring plate 1315 at the front end and the rear end through a spring, a flow channel membrane 1316 is connected to a side wall where the two spring plates 1315 are close to each other, a contraction limit frame 1317 is installed on the inner wall of the spring plate 1315 on the rear side, and a cold end spring rod 1325 is slidably connected to the front side wall of the floating airbag 131 through a spring limit, a contraction card plate 1318 that cooperates with the contraction limit frame 1317 is fixed to the front end of the cold end spring rod 1325, a cold end wedge frame 1323 is fixed to the rear end of the cold end spring rod 1325, and a cold end wedge plate 1322 is fixed to the bottom end of the driving shaft 138 connected to the top of the driving striker 137 on the front side. 2 is used in conjunction with the cold end wedge frame 1323, the inner side wall of the spring plate 1315 on the rear side is connected with an expansion limit frame 1319, the front side wall of the floating airbag 131 is slidably connected with the hot end spring rod 1326 through the spring limit, the front end of the hot end spring rod 1326 is fixedly connected with an expansion clamping plate 1320 used in conjunction with the expansion limit frame 1319, the rear side wall of the hot end spring rod 1326 is fixedly connected with the hot end wedge frame 1324, the bottom end of the driving shaft 138 connected to the top of the driving striker 137 on the rear side is fixedly connected with a hot end wedge plate 1321 used in conjunction with the hot end wedge frame 1324, the distance between the hot end wedge plate 1321 and the hot end wedge frame 1324 is equal to the distance between the two striker tubes 136, when the selection When liquid is injected into the medium storage component 6, the liquid drives the floating airbag 131 to float up, and at the same time, the floating airbag 131 blocks the output hole on the front side of the end cover 62, so that the liquid can only be discharged from the liquid flow channel 1314. After the liquid three-way valve 9 is used to select to inject low-temperature liquid into the medium storage compartment 61, the piston cylinder 14 drives the C-shaped drive frame 15 to descend, and the descending C-shaped drive frame 15 drives the driving striker 137 on the front side to descend, and then drives the cold end wedge frame 1323 to extend forward through the cold end wedge plate 1322, and drives the contraction card plate 1318 to squeeze the hot end spring rod 1326 through the forward extended cold end spring rod 1325, so that the spring plate 1315 on the rear side is brought closer to the spring plate 1315 on the front side, so that the inner wall of the flow channel membrane 1316 More wrinkles appear, and the fluid speed passing through the flow channel membrane 1316 decreases, simulating the situation when the flow rate of the low-temperature liquid decreases. When the high-temperature fluid is selected to be pumped into the medium storage chamber 61, the thermal sensitive part 133 deforms inward, and the striker tube 136 on the rear side moves to the C-shaped drive frame 15, and then the piston cylinder 14 is pushed to drive the C-shaped drive frame 15 to descend, knocking the drive striker 137 on the rear side to move downward, thereby driving the hot end wedge frame 1324 to extend forward, and the hot end spring rod 1326 drives the expansion card plate 1320 to extend forward, and then drives the expansion limit frame 1319 to extend forward, so that the spring plate 1315 on the rear side is away from the expansion limit frame 1319 on the front side, and the wrinkles of the flow channel membrane 1316 become smooth, so that the flow rate of the high-temperature fluid increases when passing through.

[0039] Working principle: Before testing, put the swirling flowmeter to be tested into the external sealed cabin 73 and connect it to the front flange of the connecting tail pipe 72, then screw the discharge tail pipe 74 into the connecting tail pipe 72 until the rear end of the discharge tail pipe 74 is in close contact with the front end of the flowmeter to be tested, then turn on the external gas suction pump 12, and select high-temperature gas or low-temperature gas to be pumped into the closed detection component 7 through the external three-way valve 10 to simulate the external temperature of the flowmeter under real industrial control;

[0040] Then, the medium suction pump 11 is started. The medium suction pump 11 is a pump body structure with a double input end, which can switch the input incoming medium. When the gas three-way valve 8 is started, high-temperature gas or low-temperature gas can be selected to be introduced into the medium storage component 6. When the low-temperature gas enters the medium storage component 6, the movable end of the push piston cylinder 14 drives the C-shaped driving frame 15 to rise, and then the bottom of the C-shaped driving frame 15 is used to knock and hit the driving striker 137 on the front side. The driving striker 137 on the front side drives the cold end driving tooth plate 1311 to rise through the bottom driving shaft 138, and then drives the expansion tooth plate 1310 to rise through the double set of transmission gears, so that the deformation membrane 139 is deformed upward, so that the path of the airflow is narrowed, and the air pressure of the airflow medium passing through is increased, simulating the situation where the air pressure of the low-temperature gas increases during transportation (in actual use, the low-temperature gas medium passing through the flow meter is prone to increase in air pressure due to various reasons such as temperature increase and narrowing of the pipeline);

[0041] When the gas three-way valve 8 is used to select to send the high-temperature medium into the medium storage cabin 61, due to the increase in the cavity temperature of the medium storage cabin 61, the thermal sensitive element 133 senses the temperature change and deforms inward, driving the thermal driving rod 134 to move, and the thermal driving rod 134 drives the driving shaft 138 on the rear side to move into the C-shaped driving frame 15, and compresses the spring telescopic tube 135. At the same time, the hot end driving tooth plate 1312 is meshed with the transmission gear. Then, when the top piston cylinder 14 drives the C-shaped driving frame 15 to move, it will knock the driving striker 137 on the rear side, and then drive the hot end driving tooth plate 1312 to rise through the driving shaft 138 at the bottom of the driving striker 137, and then drive the contraction tooth plate 1313 to descend through a single set of gears, so that the air pressure passing through this place is reduced, simulating the situation of low pressure of high-temperature gas (because the temperature of high-temperature gas is easier to drop due to heat reduction during transportation, so the pressure is easier to drop);

[0042] When liquid is injected into the medium storage component 6, the liquid drives the floating airbag 131 to float up, and at the same time, the floating airbag 131 blocks the output hole on the front side of the end cover 62, so that the liquid can only be discharged from the liquid flow channel 1314. After the liquid three-way valve 9 is used to inject the low-temperature liquid into the medium storage compartment 61, the piston cylinder 14 drives the C-shaped drive frame 15 to descend, and the descending C-shaped drive frame 15 drives the driving striker 137 on the front side to descend, and then drives the cold end wedge frame 1323 to extend forward through the cold end wedge plate 1322, and drives the contraction card plate 1318 to squeeze the hot end spring rod 1326 through the forward extended cold end spring rod 1325, so that the rear spring plate 1315 is brought closer to the front spring plate 1315, so that more wrinkles appear on the inner wall of the flow channel membrane 1316, and the fluid speed passing through the flow channel membrane 1316 is reduced, simulating the situation when the flow rate of the low-temperature liquid is reduced (because the viscosity of the low-temperature liquid medium is higher, its flow rate is easier to reduce);

[0043] When the high-temperature fluid is pumped into the medium storage chamber 61, the heat-sensitive element 133 is deformed inward, and the striker tube 136 at the rear side moves into the C-shaped drive frame 15, and then the piston cylinder 14 is pushed to drive the C-shaped drive frame 15 to descend, knocking the drive striker 137 at the rear side to move downward, thereby driving the hot end wedge frame 1324 to extend forward, and the hot end spring rod 1326 drives the expansion card plate 1320 to extend forward, thereby driving the expansion limit frame 1319 to extend forward, so that the spring plate 1315 at the rear side is away from the front side. By expanding the limit frame 1319, the folds of the flow channel membrane 1316 become smooth, so that the flow velocity of the high-temperature fluid increases when passing through (since the viscosity of the high-temperature fluid is lower, the fluid velocity is easy to increase), and the medium flowing out of the medium storage component 6 will pass through the precision flow meter 71 for verification and the swirl flow meter to be tested. The precision flow meter 71 for verification and the swirl flow meter to be tested detect the medium flow rate, and at the same time compare the total amount of medium injected into the pump body for three-phase comparison, so as to further improve the accuracy of the detection.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quality inspection device for a swirl flowmeter, comprising a test bench (1), a medium suction pump (11) installed on the rear side of the upper bottom surface of the test bench (1), an external gas suction pump (12) installed on the front side of the upper bottom surface of the test bench (1), a gas three-way valve (8), a liquid three-way valve (9) and an external three-way valve (10), characterized in that: A cold air box (2), a hot air box (3), a cold water box (4) and a hot water box (5) are installed on the bottom support suspension beam of the test bench (1); the gas three-way valve (8) is installed on the cold air box (2); the pipes connected to the two input ends of the gas three-way valve (8) penetrate the cold air box (2) and the hot air box (3) and are connected to the bottom of the cold air box (2) and the hot air box (3); the liquid three-way valve (9) is installed on the cold water tank (4); the pipes connected to the two input ends of the liquid three-way valve (9) penetrate the cold water tank (4) and the hot water tank (5) and are connected to the cold water tank (4). The bottom of the water tank (4) and the hot water tank (5), the pipes connected to the output ends of the gas three-way valve (8) and the liquid three-way valve (9) are connected to the two input ends of the medium suction pump (11), the external three-way valve (10) is installed on the outer wall of the cold air box (2), the pipes connected to the two input ends of the external three-way valve (10) penetrate the cold air box (2) and the hot air box (3) and lead to the bottom of the cold air box (2) and the hot air box (3), and the output end of the external three-way valve (10) is connected to the input end of the external gas suction pump (12) through the pipe; A medium storage component (6) is installed at the rear side of the top of the detection platform (1), and the medium storage component (6) includes a medium storage cabin (61) and two end covers (62). The two end covers (62) are connected to the front and rear side walls of the medium storage cabin (61) by bolts. The pipeline connected to the output end of the medium suction pump (11) passes through the rear end cover (62) and leads to the interior of the medium storage cabin (61). The front end cover (62) is connected to the closed detection component (7) through a pipeline. The interior of the medium storage cabin (61) is provided with a parameter control component (13).

2. The quality inspection device for the swirl flowmeter according to claim 1, characterized in that: The closed detection assembly (7) comprises a precision flow meter for verification (71), a connecting tail pipe (72), an outer sealed cabin (73) and a discharge tail pipe (74); the connecting tail pipe (72) is connected to the output end of the precision flow meter for verification (71) via a flange; the input end of the precision flow meter for verification (71) is connected to the pipeline of the end cover (62) on the front side via a flange; the outer sealed cabin (73) is fixed to the outer side wall of the connecting tail pipe (72); the discharge tail pipe (74) is threadedly connected to the front end of the outer sealed cabin (73); and the pipeline connected to the output end of the external gas suction pump (12) is communicated with the inner cavity of the outer sealed cabin (73).

3. The quality inspection device for the swirl flowmeter according to claim 1, characterized in that: A push piston cylinder (14) is installed at a position close to the front side wall at the bottom of the medium storage chamber (61); the movable end of the push piston cylinder (14) passes through the bottom of the medium storage chamber (61) and the parameter control component (13); a C-shaped drive frame (15) is installed on the movable end of the push piston cylinder (14), and the C-shaped drive frame (15) is arranged inside the parameter control component (13).

4. The quality inspection device for the swirl flowmeter according to claim 3, characterized in that: The parameter control component (13) comprises a floating airbag (131), a thermal groove (132) provided on the rear side wall of the floating airbag (131), and a thermal element (133) arranged inside the thermal groove (132); the front side wall of the thermal element (133) is fixedly connected to a thermal drive rod (134); a spring telescopic tube (135) is installed on the front inner wall of the floating airbag (131) and at the same level as the thermal drive rod (134); two firing pin tubes (136) are installed at the rear end of the spring telescopic tube (135); the firing pin tube (136) on the front side is located in the C-shaped drive frame (15); a driving firing pin (137) is connected to the two firing pin tubes (136) via a spring; the firing pin tube (136) on the rear side is tightly fitted with the thermal drive rod (134); the top and bottom of the two driving firing pins (137) are fixedly connected to a driving shaft (138).

5. The quality inspection device for the swirl flowmeter according to claim 4, characterized in that: A deformation membrane (139) is fixed on the top of the floating airbag (131), an expansion tooth plate (1310) is fixed at the rear side below the deformation membrane (139), and a cold end driving tooth plate (1311) is fixedly connected to the top of the driving shaft (138) connected to the bottom of the driving striker (137) on the front side, and the cold end driving tooth plate (1311) and the expansion tooth plate (1310) are meshed and driven by a double set of transmission gears.

6. The quality inspection device for the swirl flowmeter according to claim 5, characterized in that: A retractable tooth plate (1313) is installed at the front end of the lower side wall of the deformable membrane (139), and the top end of the driving shaft (138) connected to the bottom of the driving striker (137) on the rear side is fixedly connected to a hot end driving tooth plate (1312). The hot end driving tooth plate (1312) and the retractable tooth plate (1313) are meshed and driven by a single set of transmission gears, and the distance between the hot end driving tooth plate (1312) and the gear is equal to the distance between the two striker tubes (136).

7. The quality inspection device for the swirl flowmeter according to claim 4, characterized in that: A hook-shaped liquid flow channel (1314) is provided at the front end of the floating airbag (131). The top of the liquid flow channel (1314) is connected to spring plates (1315) at the front end and the rear end via springs. A flow channel membrane (1316) is connected to one side wall of the two spring plates (1315) close to each other. A contraction limit frame (1317) is installed on the inner side wall of the spring plate (1315) at the rear side. The front side wall of the floating airbag (131) is slidably connected to A cold end spring rod (1325), the front end of the cold end spring rod (1325) is fixed with a contraction clamping plate (1318) that cooperates with the contraction limit frame (1317), the rear end of the cold end spring rod (1325) is fixed with a cold end wedge frame (1323), the bottom end of the driving shaft rod (138) connected to the top of the driving striker (137) on the front side is fixedly connected with a cold end wedge plate (1322), and the cold end wedge plate (1322) is used in conjunction with the cold end wedge frame (1323).

8. The quality inspection device for the swirl flowmeter according to claim 7, characterized in that: An expansion limit frame (1319) is connected to the inner side wall of the spring plate (1315) on the front side, the front side wall of the floating airbag (131) is slidably connected to a hot end spring rod (1326) through a spring limit, the front end of the hot end spring rod (1326) is fixedly connected to an expansion clamping plate (1320) used in conjunction with the expansion limit frame (1319), the rear side wall of the hot end spring rod (1326) is fixedly connected to a hot end wedge frame (1324), the bottom end of the driving shaft rod (138) connected to the top of the driving striker (137) on the rear side is fixedly connected to a hot end wedge plate (1321) used in conjunction with the hot end wedge frame (1324), and the distance between the hot end wedge plate (1321) and the hot end wedge frame (1324) is equal to the distance between the two striker tubes (136).

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