Gas-liquid two-phase flowmeter
By using a combined structure of high-pressure airflow and vibration components in the gas-liquid two-phase flowmeter, the dirt and impurities in the pipeline are cleaned up, and the problem of coriolis force flowmeter is solved, ensuring the stability of measurement accuracy.
Patent Information
- Application Number
- CN202411359124.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2024-12-13
AI Technical Summary
During use, the Coriolis-type gas-liquid two-phase flowmeter is blocked due to the accumulation of impurities and rust in the pipeline, which affects the measurement accuracy.
A two-phase flowmeter of gas-liquid flowmeter is designed, and the gas-liquid flow tube is cleaned through the cylinder and vibration assembly. Using the combined structure of fixed components and vibration assembly, the high-pressure air flow drives the gas-liquid flow tube to vibrate and rotate, and the impact tube is impacted. Dirt and impurities on the wall ensure the measurement accuracy of the flowmeter.
Effectively remove dirt and impurities in the pipeline, prevent mass changes, maintain the measurement accuracy of the flowmeter, and avoid measurement errors caused by blockage.
Smart Images
Figure CN119124290A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of flow measurement, in particular to a gas-liquid two-phase flow meter. Background Art
[0002] In modern industrial production and energy fields, it is very important to accurately measure the flow rate of gas-liquid two-phase fluids. Gas-liquid two-phase flow is widely present in the production processes of many industries such as petroleum, natural gas, chemical industry, and energy. In order to meet the needs of these industries for gas-liquid two-phase flow measurement, after years of research and practice, a variety of gas-liquid two-phase flow meters have appeared, such as differential pressure type, Coriolis force type, ultrasonic type, etc. Among them, the Coriolis force gas-liquid two-phase flow meter is a high-precision flow measurement device based on the Coriolis effect. The Coriolis force gas-liquid two-phase flow meter is also called the Coriolis mass flowmeter, which has been widely used in many industries. However, during use, impurities and rust in the pipeline will accumulate in the Coriolis mass flowmeter, causing the Coriolis mass flowmeter to be blocked.
[0003] In view of the above problems, the prior art provides a solution, for example, the patent application number is CN202223245334.4, which provides a Coriolis mass flowmeter anti-clogging backflush mechanism, including a main delivery pipe and a Coriolis mass flowmeter arranged in the main delivery pipe, two first solenoid valves are installed in the main delivery pipe, and the two first solenoid valves are respectively located on both sides of the Coriolis mass flowmeter, the lower end of the main delivery pipe is fixedly connected to two branch pipes, the two branch pipes are respectively located between the first solenoid valve and the Coriolis mass flowmeter, and the upper end of the branch pipe is installed with a second solenoid valve. Valve, a nitrogen tank and a connection box are respectively provided below the main delivery pipe, the lower ends of the two branch pipes are respectively fixedly connected with the nitrogen tank and the connection box, and the upper end of the connection box is provided with a through port connected to the branch pipe. The present invention uses nitrogen to backflush the Coriolis flowmeter to achieve the purpose of dredging and preventing blockage, and is convenient for collecting and removing the cleaned impurities and rust, which is beneficial to later maintenance. However, during use, some relatively stubborn impurities will still accumulate on the inner wall of the delivery pipe, causing changes in the quality of the pipeline and resulting in quality differences, which will affect the measurement accuracy of the Coriolis flowmeter. Summary of the invention
[0004] The object of the present invention is to provide a gas-liquid two-phase flowmeter to solve the problem that during the use of a Coriolis flowmeter, impurities in the liquid accumulate in the pipeline, causing the quality between the pipelines to change, thereby affecting the measurement accuracy of the Coriolis flowmeter.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A gas-liquid two-phase flow meter comprises a shell, an electronic instrument, a gas-liquid flow pipe, a flange, a driver, a sensor, an air pipe and a cylinder. The shell is connected to the electronic instrument. The gas-liquid flow pipes are arranged side by side in the shell. Both ends of the gas-liquid flow pipes are connected together by flanges. The gas-liquid flow pipe is U-shaped. A driver is arranged in the center of the gas flow pipe. Sensors are installed on both sides of the driver. The sensors are electrically connected to the electronic instrument.
[0007] Specifically, a fixing component, a vibration component and a cylinder are provided in the shell, an air inlet is provided on the shell, an air blowing port is opened at one end of the gas-liquid flow tube, the cylinder is connected with the air inlet and the air blowing port through an air pipe, a fixing component and a vibration component are provided on the cylinder, the fixing component fixes the gas-liquid flow tube by means of a high-pressure airflow passing through the cylinder, and the vibration component drives the gas-liquid flow tube to vibrate by means of a high-pressure airflow passing through the cylinder.
[0008] It is easy to understand that when the flow meter is measuring, the measured gas-liquid fluid enters the gas-liquid flow tube of the flow meter through the pipeline. The measuring tube in the flow meter vibrates at a certain frequency and amplitude under the action of the driver. When the fluid flows in the vibrating measuring tube, due to the Coriolis effect, the fluid will be affected by the Coriolis force. This force acts on the measuring tube and produces distortion. The sensor measures the mass flow rate of the fluid by detecting the degree of distortion of the measuring tube and converts it into an electrical signal. The mass flow rate and other related parameters of the fluid are calculated through a specific algorithm. The flow result can be output through an electronic instrument for users to read or use in the control system.
[0009] Furthermore, when the flow meter needs to be cleaned, the valve at the front end of the flow meter pipeline is first closed to prevent the gas-liquid fluid from flowing through the flow meter. At this time, the air inlet is connected to the external high-pressure airflow through the pipeline, and the high-pressure airflow comes to the cylinder inside the shell. At this time, the fixing component uses the high-pressure airflow through the cylinder to fix the gas-liquid flow tube, and the vibration component uses the high-pressure airflow through the cylinder to drive the gas-liquid flow tube to vibrate. The high-pressure airflow passes through the cylinder and comes to the blowing port on the gas-liquid flow tube. The high-pressure airflow blows reversely into the gas-liquid flow tube through the blowing port. The high-pressure airflow has a very high speed and kinetic energy. When it enters the pipeline, it will act on the dirt, sediment and impurities on the inner wall of the pipeline with a strong impact force. This impact force can loosen and break the dirt, and detach it from the inner wall of the pipeline, and blow it away from the flow meter, so as to avoid the accumulation of dirt and impurities on the inner wall of the gas-liquid flow tube. Increase the mass and damping of the pipeline system, change the natural frequency and vibration amplitude of the vibration tube, and ensure the measurement accuracy of the flow meter.
[0010] Preferably, the fixing assembly includes a piston, a push rod, a boss, a support rod and a No. 1 spring. The cylinder is horizontally installed above and below the gas-liquid flow tube. A sliding cavity is provided in the cylinder, one end of the sliding cavity is connected to the air inlet, a piston is slidably installed in the sliding cavity, the piston is connected to the push rod, a plurality of bosses are provided on the push rod, a pushing surface is obliquely provided on the boss, a plurality of support rods are vertically slidably installed on the side wall of the cylinder, the support rod passes through the side wall of the cylinder, a force-bearing surface is obliquely provided at one end of the support rod located on the inner side of the cylinder, a No. 1 spring is coaxially installed on the support rod, both ends of the No. 1 spring are respectively connected to the cylinder and the support rod, the pushing surface is in contact with the force-bearing surface, and the support rod located on the outer side of the cylinder is in contact with the gas-liquid flow tube.
[0011] When the high-pressure airflow enters the gas-liquid flow tube for cleaning, the instantaneous impact of the high-pressure airflow on the gas-liquid flow tube will cause the gas-liquid flow tube to produce a large deformation and plastic deformation, the cross-sectional area of the gas-liquid flow tube changes, and the quality of the gas-liquid fluid flowing through the gas-liquid flow tube deviates, thereby affecting the measurement accuracy of the sensor. Therefore, through the connection design between the sliding chamber in the cylinder and the air inlet, when the high-pressure airflow enters the sliding chamber, the high-pressure airflow pushes the piston to slide, the piston drives the push rod to move, and the push rod drives the boss to move. Through the fit between the pushing surface of the boss and the force surface on the support rod and the inclined design of the pushing surface and the force surface of the support, the horizontal movement of the push rod is converted into vertical movement in the axial direction of the support rod, so that the support rod is fitted with the gas-liquid flow tube, and the high-pressure airflow used for cleaning is converted by the cylinder and the piston, so that the support rod is fitted and clamped to the gas-liquid flow tube, so as to avoid the gas-liquid flow tube from producing a large deformation and plastic deformation, thereby affecting the measurement accuracy of the sensor, thereby ensuring the measurement accuracy of the flowmeter.
[0012] Preferably, the vibration assembly includes a swivel seat, a swivel rod, fan blades and a protrusion, the cylinder is flexibly connected to the shell, a vibration chamber is provided in the cylinder, one end of the vibration chamber is connected to the sliding chamber, a swivel seat is coaxially symmetrically installed in the vibration chamber, a swivel rod is coaxially rotatably installed between the swivel seats, the radial plane of the swivel rod is parallel to the horizontal radial plane of the gas-liquid flow tube, fan blades are evenly distributed in a ring shape at the center of the swivel rod, the swivel rod is provided with fan-shaped protrusions on the side walls between the fan blades and the swivel seats at both ends, and one end of the vibration chamber is connected to the blowing port.
[0013] During the cleaning process of the gas-liquid flow pipe by the high-pressure airflow, there will be residual sediments and impurities adhered to the pipe wall, and the high-pressure airflow cannot effectively blow them away from the gas-liquid flow pipe. These residual sediments and impurities increase the mass and damping of the pipeline system, change the natural frequency and vibration amplitude of the gas-liquid flow pipe, and thus cause measurement errors. Therefore, a vibration chamber is designed in the cylinder, and the vibration chamber is connected to the sliding chamber. When the high-pressure airflow pushes the piston to move to the set position, the high-pressure airflow flows into the vibration chamber. At this time, the high-pressure airflow acts on the fan blades. Under the action of the fan blades, the thrust of the high-pressure airflow is converted into driving the fan blades to rotate. The rotation of the fan blades drives the rotating rod to rotate. Since the rotating rod is provided with The fan-shaped protrusion generates a periodic unbalanced force during the rotation of the rotating rod, which causes the rotating rod to vibrate. The vibration of the rotating rod is transmitted to the cylinder through the rotating seat, thereby driving the cylinder to vibrate. The vibration of the cylinder is transmitted to the gas-liquid flow tube through the support, thereby driving the gas-liquid flow tube to vibrate. The high-pressure airflow is converted into rotation of the rotating rod through the fan blades, thereby driving the rotation of the fan-shaped cam, and then generating vibration. The vibration generated in the process drives the vibration of the gas-liquid flow tube through the rotating seat support rod to shake off or loosen the residual sediment and impurities on the tube wall, and is taken away from the flowmeter by the high-pressure airflow, thereby avoiding measurement errors caused by residual sediment and impurities on the tube wall, thereby ensuring the measurement accuracy of the flowmeter.
[0014] Preferably, the support rod is Y-shaped, and the support rod includes a supporting part, a sliding part and a contact part. The supporting part is provided with a force surface, and the supporting part is vertically slidably installed with a sliding part on the radial plane of the gas-liquid flow tube. The supporting part and the sliding part are connected by a No. 2 spring, and the sliding part is connected with a symmetrically arranged contact part, and the contact part is in contact with the gas-liquid flow tube.
[0015] During the cleaning vibration process, since the fan-shaped protrusions perform circular motion, the vibration direction on the radial plane of the gas-liquid flow tube can be divided into vertical and horizontal directions. When the vibration direction is in the vertical direction, the gas-liquid flow tube will be deformed, causing the cross-sectional area of the gas-liquid flow tube to change, and the quality of the gas-liquid fluid flowing through the gas-liquid flow tube will deviate, resulting in errors in the flow rate. The sensor measures the flow rate in the gas-liquid flow tube by measuring the vibration amplitude and frequency of the gas-liquid flow tube in the horizontal direction. At the beginning of the design, the gas-liquid flow tube reserves a vibration margin on the horizontal plane. Therefore, the vibration in the horizontal direction will not affect it. Therefore, the sliding part is vertically slidably installed on the supporting part on the radial plane of the gas-liquid flow tube. When the supporting part vibrates, the vibration in the vertical direction is offset by the relative sliding of the sliding part and the supporting part and the vibration reduction of the No. 2 spring, and the vibration in the horizontal direction will be transmitted to the gas-liquid flow tube through the sliding part, thereby avoiding the deformation of the gas-liquid flow tube caused by the vibration in the vertical direction, causing deviation in the quality of the gas-liquid fluid flowing through the gas-liquid flow tube, causing errors in the flow rate, and ensuring the measurement accuracy of the flowmeter.
[0016] Preferably, an air outlet is provided on the cylinder, the air outlet is connected to the vibration chamber, the air outlet is connected to the air port through an air pipe, a pulse valve is installed at the connection between the air outlet and the air pipe, the pulse valve comprises an air bag, a chassis, a turntable, a No. 1 torsion spring, a hinge and a convex rod, one end of the air bag is connected to the air outlet, the other end of the air bag is connected to the air pipe, a chassis is installed in the port where the air bag and the air pipe are connected, a No. 1 vent hole is provided in the center of the chassis, a plurality of guide grooves are provided on the chassis, the guide grooves are connected end to end, guide blocks and sliders are provided on the planes at both ends of the hinge, and the center of the turntable A No. 2 air vent is opened, and one end of the turntable is provided with a circular evenly distributed slide groove, and a plurality of hinges are evenly distributed in a circular shape between the chassis and the turntable, and the side walls between the hinges fit each other, the guide block slides in cooperation with the guide groove, and the slider slides in cooperation with the slide groove, and the number of hinges is the same as the number of slide grooves and guide grooves, and the chassis and the turntable fit together, and the chassis and the turntable are connected by a No. 1 torsion spring, a convex rod is provided on one end of the turntable, and one end of the rotating rod passes through the air outlet, and a lever is provided on one end of the rotating rod passing through the air outlet, and the rotating rod and the lever are connected by a No. 2 torsion spring, and the convex rod and the lever fit together.
[0017] When cleaning the sediments and impurities on the inner wall of the gas-liquid flow tube, some relatively stubborn impurities will still remain. In order to increase the cleaning effect, a chassis is designed and installed in the port where the airbag and the air pipe are connected. The chassis is provided with a plurality of guide grooves connected end to end. A plurality of hinges are evenly distributed in an annular pattern between the chassis and the turntable. Guide blocks and sliders are provided on the planes at both ends of the hinges. The guide blocks slide in cooperation with the guide grooves of the chassis, and the sliders slide in cooperation with the slide grooves of the turntable. The chassis and the turntable fit together. The chassis and the turntable are connected by a No. 1 torsion spring. As the high-pressure airflow comes into the airbag from the air outlet, the airbag is in a closed state at this time, and the air The air pressure in the bag is constantly increasing, and the volume of the bag increases accordingly. As the rotating rod rotates, the lever is driven to rotate. When the lever rotates to the set position and contacts the convex rod, as the rotating rod continues to move, the push rod pushes the convex rod to move, and the convex rod drives the turntable to rotate. The rotation of the turntable drives the hinge to slide along the guide groove through the cooperation of the slide groove and the slider. Under the action of the guide groove and the turntable, the side walls of the hinge are separated. As the lever continues to rotate, when the slider moves to the far end limit position of the slide groove, the hinge stops moving. At this time, a closed ring hole is formed between the hinges, and the diameter of the ring hole is larger than the No. 1 through hole. At this time, the airbag contracts and the inside of the airbag is closed. The high-pressure airflow enters the air pipe through the No. 2 air hole, the annular hole and the No. 1 air hole in turn. When the hinge reaches the limit position and stops rotating, the turntable and the convex rod stop rotating. As the turntable continues to rotate, the interaction force component between the lever and the convex rod increases. At this time, the force acts on the No. 2 torsion spring, the No. 2 torsion spring is compressed, and the angle of the lever changes. As the turntable continues to rotate and reaches the set position, the lever separates from the convex rod. At this time, the elastic potential energy of the No. 2 torsion spring is released to push the lever to reset, and it continues to rotate with the turntable. At the same time, since the No. 1 torsion spring is compressed during the rotation of the turntable, when the lever is released When the convex rod is separated, the elastic potential energy of the No. 1 torsion spring is released, pushing the turntable to rotate in the opposite direction. The turntable drives the hinge to slide along the guide groove through the cooperation of the slide groove and the slider. Under the action of the guide groove, the side walls of the hinge are re-fitted, and the airbag is punched by the high-pressure airflow. At the same time, the turntable is intermittently turned by the rotation of the rotating rod. At the same time, with the cooperation of the No. 1 torsion spring, the hinge is intermittently opened and closed. At this time, the high-pressure airflow in the airbag is intermittently released to impact the gas-liquid flow tube, and the sediments and impurities on the tube wall are shaken off and taken away from the flowmeter by the high-pressure airflow, thereby ensuring the measurement accuracy of the flowmeter.
[0018] Preferably, the direction of the air flow blown out of the air port is parallel to the axial direction of the gas-liquid flow tube.
[0019] When high-pressure air flows out from the blowing port, there will be an uneven distribution of airflow acting on the inner wall of the gas-liquid flow tube, resulting in incomplete cleaning of the tube wall. The design of the airflow direction blown out of the blowing port is parallel to the axial direction of the gas-liquid flow tube, so that the blown high-pressure airflow acts evenly on the inner wall of the gas-liquid flow tube in a circular shape, avoiding the problem of incomplete cleaning of the tube wall due to uneven distribution of airflow acting on the inner wall of the gas-liquid flow tube, thereby ensuring the measurement accuracy of the flow meter.
[0020] Preferably, the inner wall of the air blowing port is evenly distributed with inclined guide vanes, and the angle between the inclined guide vanes and the axis of the air blowing port is α, wherein 10°<α<40°.
[0021] In order to provide a cleaning effect for the high-pressure airflow and the gas-liquid flow tube, inclined guide vanes are evenly distributed on the inner wall of the air port, and the angle between the inclined guide vanes and the axis of the air port is between 10° and 40°. When the high-pressure airflow passes through the inclined guide vanes, the direction of the high-pressure airflow changes under the action of the inclined guide vanes. This change will destroy the smooth flow state of the fluid, and it is easy to produce local vortices and velocity gradients near the guide vanes, thereby causing turbulence. The speed and direction of the turbulent state are constantly changing, constantly impacting the accumulated impurities on the inner wall of the gas-liquid flow tube, and at the same time, the residual sediments and impurities on the tube wall are accelerated to fall or loosen during the impact process, and are taken away from the flowmeter by the high-pressure airflow, thereby ensuring the measurement accuracy of the flowmeter.
[0022] Preferably, an opening and closing valve is provided at the connection between the air port and the air pipe, and the opening and closing valve includes a clamping ring, a valve core, a connecting rod, a limit ring and a No. 3 spring. The inner wall of the air pipe is connected with a clamping ring, the axis of the valve core is connected to one end of the connecting rod, and the other end of the connecting rod is coaxially connected to a limit ring, the limit ring is fitted with the inner wall of the air pipe, and a No. 3 spring is coaxially installed on the connecting rod, and the two ends of the No. 3 spring are respectively connected with a limit ring and a clamping ring, the clamping ring is provided with a No. 1 inclined surface, the valve core is provided with a No. 2 inclined surface, and the side of the valve core is provided with an inclined groove, the inclined groove and the inclined guide plate are equal in angle with the axis of the air port, and the No. 1 inclined surface and the No. 2 inclined surface are fitted.
[0023] Since the cylinder and the gas-liquid flow pipe are connected by an air pipe, when the gas-liquid fluid is passed into the gas-liquid flow pipe for measurement, the gas-liquid flow pipe will flow into the air pipe. At this time, some of the gas-liquid fluid will flow into the air pipe. When the flow meter measures, the actual flow rate and the measured flow rate will be deviated. Therefore, when the high-pressure airflow reaches the connection between the air port and the air pipe, the high-pressure airflow acts on the end face of the valve core, pushing the valve core to move in the air pipe. The movement of the valve core drives the connecting rod, and the connecting rod drives the limit ring to slide in the air pipe. The limit pushes the No. 3 spring, causing the No. 3 spring to be compressed. In the process, the No. 2 inclined surface and the No. 1 inclined surface are separated during the movement of the valve core, and the high-pressure airflow flows through the gap, thereby entering the gas-liquid flow pipe. At the same time, due to the limit ring and The fit of the inner wall of the air pipe ensures that the valve core is always in the center of the air pipe, so that the high-pressure airflow can flow evenly around the valve core. When the airflow stops flowing, the elastic potential energy of the No. 3 spring is released, pushing the limit ring to slide in the air pipe, the limit ring drives the connecting rod to move, and the connecting rod drives the valve core to move, so that the No. 1 inclined surface and the No. 2 inclined surface are re-fitted, and the valve core slides back and forth in the air pipe, so that the No. 2 inclined surface on the valve core is separated from the No. 1 inclined surface on the retaining ring, while ensuring the passage of high-pressure airflow, preventing gas-liquid fluid from flowing into the air pipe during measurement, avoiding gas-liquid fluid from entering the air pipe, and the actual flow rate and the measured flow rate will be deviated when the flowmeter measures, thereby ensuring the measurement accuracy of the flowmeter.
[0024] Furthermore, an inclined groove is provided on the side of the valve core, and the angle between the inclined groove and the inclined guide vane and the axis of the blowing port is equal. When the high-pressure airflow passes through the inclined groove, the direction of the high-pressure airflow changes under the action of the inclined groove. This change will destroy the smooth flow state of the fluid, and it is easy to generate local vortices and velocity gradients near the guide groove, thereby causing turbulence. The speed and direction of the turbulent state are constantly changing. At the same time, with the help of the inclined guide vane, the accumulated impurities on the inner wall of the gas-liquid flow tube are continuously impacted. The impact process accelerates the vibration or loosening of the residual sediments and impurities on the tube wall, and is taken away from the flowmeter by the high-pressure airflow, thereby ensuring the measurement accuracy of the flowmeter.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] 1. The present invention uses the arrangement of the pulse valve in the air outlet so that high-pressure airflow enters the airbag and accumulates continuously. As the rotating rod rotates, the lever drives the hinge to open and close intermittently. At the same time, the high-pressure airflow of the airbag intermittently reaches the air outlet through the hinge. The high-pressure airflow pushes the piston through the inclined guide vane into the gas-liquid flow tube. Through the intermittent blowing of the high-pressure airflow and the guiding effect of the inclined guide vane, the sediments and impurities on the tube wall are shaken off or loosened, and are taken away from the flow meter by the high-pressure airflow, thereby ensuring the measurement accuracy of the flow meter.
[0027] 2. The present invention uses a fixing assembly and utilizes high-pressure airflow to drive the piston to ultimately clamp the support rod up and down in the vertical direction to fix the gas-liquid flow tube, thereby avoiding the problem that the measurement accuracy of the flow meter is affected by the impact of the high-pressure airflow on the gas-liquid flow tube, thereby ensuring the measurement accuracy of the flow meter.
[0028] 3. The present invention uses a vibration component and a support rod to convert high-pressure airflow into rotation of a rotating rod through fan blades, thereby driving the fan-shaped cam to rotate. The vibration generated in the process is offset by the elastic connection between the sliding part and the support part and the relative sliding of the position, while the vibration in the horizontal direction is transmitted to the gas-liquid flow tube through the sliding part of the support rod, shaking off or loosening the sediment and impurities remaining on the tube wall, and taking them away from the flow meter through the high-pressure airflow, thereby avoiding measurement errors caused by the sediment and impurities remaining on the tube wall, thereby ensuring the measurement accuracy of the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the overall structure of the gas-liquid two-phase flowmeter of the present invention;
[0030] Figure 2 It is a schematic diagram of the overall internal structure of the gas-liquid two-phase flowmeter of the present invention;
[0031] Figure 3 is a cross-sectional view of the gas-liquid flow tube of the present invention;
[0032] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle A;
[0033] Figure 5 It is a schematic diagram of the structure of the fixing assembly and the vibration assembly of the present invention;
[0034] Figure 6 is a cross-sectional view of a support rod of the present invention;
[0035] Figure 7 An exploded view of the pulse valve of the present invention;
[0036] Figure 8 It is a schematic diagram of the rotating rod structure of the present invention.
[0037] In the figure: 1, shell; 11, air inlet; 2, electronic instrument; 21, driver; 22, sensor; 3, gas-liquid flow pipe; 31, air outlet; 4, flange; 5, air pipe; 6, cylinder; 61, air outlet; 62, sliding cavity; 63, vibration cavity; 7, vibration assembly; 71, rotating seat; 72, rotating rod; 73, fan blade; 74, bump; 8, fixing assembly; 81, inclined guide; 82, piston; 83, push rod; 84, boss; 85, spring No. 1; 86, support rod; 861, sliding part; 862, support part; 863, contact part; 864, force surface; 865, pushing surface; 866, spring No. 2; 9, pulse valve; 91, air bag; 92, chassis; 921, vent No. 1; 922, guide groove; 93, turntable; 94, convex rod; 941, vent No. 2; 942, slide groove; 95, torsion spring No. 1; 96, hinge; 961, slider; 962, guide block; 963, lever; 97, torsion spring No. 2; 10, opening and closing valve; 101, retaining ring; 102, inclined surface No. 1; 103, connecting rod; 104, valve core; 105, inclined surface No. 2; 106, inclined groove; 107, limit ring; 108, spring No. 3. DETAILED DESCRIPTION
[0038] See also Figures 1 to 8 The present invention provides a gas-liquid two-phase flowmeter, and the technical solution is as follows:
[0039] A gas-liquid two-phase flow meter, comprising a shell 1, an electronic instrument 2, a gas-liquid flow tube 3, a flange 4, a driver 21, a sensor 22, an air pipe 5 and a cylinder 6, wherein the shell 1 is connected to the electronic instrument 2, the gas-liquid flow tube 3 is arranged side by side in the shell 1, the two ends of the gas-liquid flow tube 3 are commonly connected with the flange 4, the gas-liquid flow tube 3 is U-shaped, the center of the gas flow tube is provided with a driver 21, and sensors 22 are installed on both sides of the driver 21, and the sensor 22 is electrically connected to the electronic instrument 2, characterized in that a vibration component 7, a fixing component 8 and a cylinder 6 are provided in the shell 1, and a gas-liquid flow tube 3 is provided on the shell 1. An air inlet 11 and an air blowing port 31 are provided at one end of the air-liquid flow tube 3, the direction of the air flow blown out of the air blowing port 31 is parallel to the axial direction of the air-liquid flow tube 3, and the inner wall of the air blowing port 31 is evenly distributed with inclined guide vanes 81, and the angle between the inclined guide vanes 81 and the axial center of the air blowing port 31 is α, wherein α is 30°, and the cylinder 6 is connected to the air inlet 11 and the air blowing port 31 through the air pipe 5, and a fixing component 8 and a vibration component 7 are provided on the cylinder 6, and the fixing component 8 fixes the air-liquid flow tube 3 by the high-pressure airflow passing through the cylinder 6, and the vibration component 7 drives the air-liquid flow tube 3 to vibrate by the high-pressure airflow passing through the cylinder 6.
[0040] See also Figure 2 , Figure 5 , Figure 6The fixing assembly 8 includes a piston 82, a push rod 83, a boss 84, a support rod 86 and a spring 85. The gas-liquid flow tube 3 is horizontally installed with a cylinder 6 above and below. A sliding chamber 62 is provided in the cylinder 6. The air inlet 11 is connected to one end of the sliding chamber 62. A piston 82 is slidably installed in the sliding chamber 62. The push rod 83 is connected to the piston 82. A plurality of bosses 84 are provided on the push rod 83. A push surface 865 is inclined on the boss 84. A plurality of support rods 86 are vertically slidably installed on the side wall of the cylinder 6. The support rod 86 penetrates the side wall of the cylinder 6. A spring 85 is coaxially installed on the support rod 86. The two ends of the No. 1 spring 85 are respectively connected to the cylinder 6 and the support rod 86. The support rod 86 is Y-shaped. The support rod 86 includes a sliding portion 861, a supporting portion 862 and a contact portion 863. The supporting portion 862 is vertically slidably installed with the sliding portion 861 on the radial plane of the gas-liquid flow tube 3. The No. 2 spring 866 is connected with the supporting portion 862 and the sliding portion 861. The sliding portion 861 is connected with the contact portion 863 which is symmetrically arranged. The contact portion 863 is in contact with the gas-liquid flow tube 3, and the pushing surface 865 is in contact with the force surface 864. The support rod 86 located outside the cylinder 6 is in contact with the gas-liquid flow tube 3.
[0041] See also Figure 5 , Figure 8 The vibration assembly 7 includes a swivel seat 71, a swivel rod 72, a fan blade 73 and a protrusion 74. The cylinder 6 is flexibly connected to the shell 1. A vibration chamber 63 is provided in the cylinder 6. The sliding chamber 62 is connected to one end of the vibration chamber 63. The swivel seat 71 is coaxially symmetrically installed in the vibration chamber 63. The swivel rod 72 is coaxially rotatably installed between the swivel seats 71. The radial plane of the swivel rod 72 is parallel to the horizontal radial plane of the gas-liquid flow tube 3. The fan blades 73 are evenly distributed in an annular shape at the center of the swivel rod 72. The swivel rod 72 is provided with fan-shaped protrusions 74 on the side wall between the fan blades 73 and the swivel seats 71 at both ends. The blowing port 31 is connected to one end of the vibration chamber 63.
[0042] See also Figure 5 , Figure 7The cylinder 6 is provided with an air outlet 61, which is communicated with the vibration chamber 63, and the air outlet 61 is communicated with the blowing port 31 through the air pipe 5. The pulse valve 9 is installed at the connection between the air outlet 61 and the air pipe 5. The pulse valve 9 includes an air bag 91, a chassis 92, a turntable 93, a No. 1 torsion spring 95, a hinge 96 and a protruding rod 94. The air outlet 61 is communicated with one end of the air bag 91, and the other end of the air bag 91 is communicated with the air pipe 5. The chassis 92 is installed in the port where the air bag 91 is connected to the air pipe 5. The center of the chassis 92 is provided with a No. 1 vent 921, and the chassis 92 is provided with a plurality of guide grooves 922, which are connected end to end. Slide blocks 961 and guide blocks 962 are provided on the planes at both ends of the hinge 96, and a No. 2 There is a vent 941, and one end of the turntable 93 is provided with a circular evenly distributed slide groove 942. A plurality of hinges 96 are evenly distributed between the turntable 93 and the chassis 92. The side walls of the hinges 96 fit together. The guide groove 922 slides with the guide block 962. The slider 961 slides with the slide groove 942. The number of hinges 96 is the same as the number of slide grooves 942 and guide grooves 922. The chassis 92 and the turntable 93 fit together. The chassis 92 and the turntable 93 are connected at both ends of the No. 1 torsion spring 95. A convex rod 94 is provided on one end of the turntable 93. One end of the rotating rod 72 passes through the air outlet 61. A lever 963 is provided on one end of the rotating rod 72 passing through the air outlet 61. The lever 963 and the rotating rod 72 are connected by a No. 2 torsion spring 97. The lever 963 and the convex rod 94 fit together.
[0043] See also Figure 3 , Figure 4 , Figure 8 An opening and closing valve 10 is provided at the connection between the air pipe 5 and the air blowing port 31. The opening and closing valve 10 includes a clamping ring 101, a connecting rod 103, a valve core 104, a limit ring 107 and a No. 3 spring 108. The inner wall of the air pipe 5 is connected with a clamping ring 101, one end of the connecting rod 103 is connected to the axial center of the valve core 104, and the other end of the connecting rod 103 is coaxially connected to the limit ring 107, and the limit ring 107 is fitted with the inner wall of the air pipe 5. The No. 3 spring 108 is coaxially installed on the connecting rod 103, and the two ends of the No. 3 spring 108 are respectively connected with the limit ring 107 and the clamping ring 101. The clamping ring is provided with a No. 1 inclined surface 102, and the valve core 104 is provided with a No. 2 inclined surface 105. The side of the valve core 104 is provided with an inclined groove 106, and the inclined guide piece 81 and the inclined groove 106 are equal in angle with the axial center of the air blowing port 31, and the No. 2 inclined surface 105 is fitted with the No. 1 inclined surface 102.
[0044] Working principle: When the flow meter is measuring, the gas-liquid fluid to be measured enters the gas-liquid flow tube 3 of the flow meter through the pipeline. The measuring tube in the flow meter vibrates at a certain frequency and amplitude under the action of the driver 21. When the fluid flows in the vibrating measuring tube, due to the Coriolis effect, the fluid will be affected by the Coriolis force. This force causes the measuring tube to twist and deform. The sensor 22 detects the deformation of the measuring tube and converts it into an electrical signal. The mass flow rate and other related parameters of the fluid are calculated through a specific algorithm. The flow result can be output through the electronic instrument 2 for the user to read or used in the control system.
[0045] When the flow meter needs to be cleaned, first close the valve at the front end of the flow meter pipeline to prevent the gas-liquid fluid from flowing through the flow meter. At this time, the air inlet 11 is connected to the external high-pressure airflow through the pipeline, and the high-pressure airflow comes to the cylinder 6 inside the shell 1. The high-pressure airflow first comes to the sliding chamber 62 through the pipeline. At this time, the high-pressure airflow pushes the piston 82 to slide, and the piston 82 drives the push rod 83 to move, and the push rod 83 drives the boss 84 to move. The pushing surface 865 of the boss 84 fits with the force surface 864 on the support rod 86 and the pushing surface 865 and the support force surface 864 are inclined. The horizontal movement of the push rod 83 is converted into vertical movement in the axial direction of the support rod 86, so that the support rod 86 fits and clamps the gas-liquid flow tube 3, so as to avoid the high-pressure airflow causing a large deformation and plastic deformation of the gas-liquid flow tube 3 during cleaning.
[0046] When the high-pressure airflow pushes the piston 82 to move to the set position, the high-pressure airflow flows into the vibration chamber 63. At this time, the high-pressure airflow acts on the fan blades 73. Under the action of the fan blades 73, the thrust of the high-pressure airflow is converted into driving the fan blades 73 to rotate. The rotation of the fan blades 73 drives the rotating rod 72 to rotate. Since the rotating rod 72 is provided with a fan-shaped protrusion 74, there is a periodic unbalanced force during the rotation of the rotating rod 72, which causes the rotating rod 72 to vibrate. The vibration of the rotating rod 72 is transmitted to the cylinder 6 through the rotating seat 71, thereby driving the cylinder 6 to vibrate. The vibration of the cylinder 6 drives the support part 862 to vibrate. At this time, since the support part 862 is in the gas-liquid A sliding portion 861 is vertically slidably installed on the radial plane of the flow tube 3, and the supporting portion 862 is connected to the sliding portion 861 by a No. 2 spring 866. When the supporting portion 862 vibrates, the vibration in the vertical direction is offset by the relative sliding of the sliding portion 861 and the supporting portion 862 and the vibration reduction of the No. 2 spring 866, and the vibration of the sliding portion 861 in the horizontal direction is retained. The sliding portion 861 drives the contact portion 863 to vibrate, and the contact portion 863 fits with the gas-liquid flow tube 3, thereby driving the gas-liquid flow tube 3 to vibrate in the horizontal direction, ensuring vibration while avoiding the longitudinal displacement of the measurement zero point of the sensor 22.
[0047] When the high-pressure airflow continues to move forward after passing through the fan blades 73, the high-pressure airflow enters the airbag 91 from the air outlet 61. At this time, the airbag 91 is in a closed state, and the air pressure in the airbag 91 continues to increase, and the volume of the airbag 91 increases accordingly. As the rotating rod 72 rotates, the lever 963 is driven to rotate. When the lever 963 rotates to the set position and contacts the protruding rod 94, as the rotating rod 72 continues to move, the push rod 83 pushes the protruding rod 94 to move, and the protruding rod 94 drives the rotating disk 93 to rotate. The rotating disk 93 rotates and drives the hinge 96 along the groove 942 through the cooperation with the slider 961. The guide groove 922 slides, and the side wall of the hinge 96 separates under the action of the guide groove 922 and the rotating disk 93. As the lever 963 continues to rotate, when the slider 961 moves to the distal limit position of the slide groove 942, the hinge 96 stops moving. At this time, the hinges 96 are surrounded by a closed annular hole, and the diameter of the annular hole is larger than the No. 1 through hole. At this time, the airbag 91 shrinks, and the high-pressure airflow in the airbag 91 enters the trachea 5 through the No. 2 air through hole, the annular hole and the No. 1 air hole 921 in sequence. When the hinge 96 reaches the limit position and stops rotating, the rotating disk 93 and the convex rod 94 stops rotating. As the rotating rod 72 continues to rotate, the interaction force component between the lever 963 and the protruding rod 94 increases. At this time, the force acts on the second torsion spring 97, and the second torsion spring 97 is compressed, and the angle of the lever 963 changes. As the rotating rod 72 continues to rotate and reaches the set position, the lever 963 separates from the protruding rod 94. At this time, the elastic potential energy of the second torsion spring 97 is released to push the lever 963 to reset, and continue to rotate with the rotating rod 72. At the same time, since the first torsion spring 95 is compressed during the rotation of the rotating disk 93, when the lever 96 When the protruding rod 94 is disengaged, the elastic potential energy of the No. 1 torsion spring 95 is released, pushing the turntable 93 to rotate in the opposite direction. The turntable 93 drives the hinge 96 to slide along the guide groove 922 through the cooperation of the slide groove 942 and the slider 961. Under the action of the guide groove 922, the side wall of the hinge 96 is refitted. In this way, the airbag 91 is punched by the high-pressure airflow, and the turntable 93 is intermittently toggled by the rotation of the rotating rod 72. At the same time, the hinge 96 is intermittently opened and closed in cooperation with the No. 1 torsion spring 95, and the high-pressure airflow in the airbag 91 is intermittently released.
[0048] The high-pressure airflow passes through the pulse valve 9 and the air pipe 5 to the opening and closing valve 10 at the connection between the blowing port 31 and the air pipe 5. The high-pressure airflow acts on the end face of the valve core 104, pushing the valve core 104 to move in the air pipe 5. The movement of the valve core 104 drives the connecting rod 103, and the connecting rod 103 drives the limiting ring 107 to slide in the air pipe 5. The limiting pushes the No. 3 spring 108, so that the No. 3 spring 108 is compressed. In the process, the No. 2 inclined surface 105 and the No. 1 inclined surface 102 are separated during the movement of the valve core 104, and the high-pressure airflow flows through the gap, thereby entering the gas-liquid flow pipe 3. At the same time, because the limiting ring 107 fits the inner wall of the air pipe 5, it is ensured that the valve core 104 is always in The valve core 104 is located at the center of the air pipe 5, so that the high-pressure airflow can flow evenly around the valve core 104. When the airflow stops flowing, the elastic potential energy of the No. 3 spring 108 is released, pushing the limit ring 107 to slide in the air pipe 5, and the limit ring 107 drives the connecting rod 103 to move, and the connecting rod 103 drives the valve core 104 to move, so that the No. 1 inclined surface 102 and the No. 2 inclined surface 105 are re-fitted, and the valve core 104 slides back and forth in the air pipe 5, so that the No. 2 inclined surface 105 on the valve core 104 is separated from the No. 1 inclined surface 102 on the retaining ring 101, while ensuring the passage of high-pressure airflow, preventing gas and liquid fluids from flowing into the air pipe 5 during measurement.
[0049] When the high-pressure airflow passes through the valve core 104 and flows through the inclined guide vane 81 and the inclined groove 106, the inclined groove 106 and the inclined guide vane 81 are at an angle equal to the axis of the blowing port 31. Under the action of the inclined groove 106 and the inclined guide vane 81, the direction of the high-pressure airflow changes. This change will destroy the smooth flow state of the fluid, and it is easy to generate local vortices and velocity gradients near the inclined groove 106 and the inclined guide vane 81, thereby causing turbulence. The speed and direction of the turbulent state are constantly changing, and the intermittent high-pressure airflow blown out in the reverse direction constantly impacts the accumulated impurities on the inner wall of the gas-liquid flow tube 3. At the same time, the residual sediments and impurities on the tube wall are accelerated to fall off or loosen during the impact process, and are taken away from the flow meter by the high-pressure airflow to achieve the purpose of cleaning.
[0050] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.
Claims
1. A gas-liquid two-phase flow meter, comprising a housing (1), an electronic instrument (2), a gas-liquid flow pipe (3), a flange (4), a driver (21), a sensor (22), an air pipe (5) and a cylinder (6), wherein the housing (1) is connected to the electronic instrument (2), the gas-liquid flow pipes (3) are arranged side by side in the housing (1), the two ends of the gas-liquid flow pipes (3) are connected together by flanges (4), the gas-liquid flow pipes (3) are U-shaped, the center of the gas flow pipe is provided with a driver (21), the two sides of the driver (21) are provided with sensors (22), the sensor (22) is electrically connected to the electronic instrument (2), and the characteristics are as follows: The housing (1) is provided with a fixing component (8), a vibration component (7) and a cylinder (6); the housing (1) is provided with an air inlet (11); one end of the gas-liquid flow pipe (3) is provided with an air blowing port (31); the cylinder (6) is connected to the air inlet (11) and the air blowing port (31) through an air pipe (5); the cylinder (6) is provided with a fixing component (8) and a vibration component (7); the fixing component (8) fixes the gas-liquid flow pipe (3) by means of a high-pressure airflow passing through the cylinder (6); and the vibration component (7) drives the gas-liquid flow pipe (3) to vibrate by means of a high-pressure airflow passing through the cylinder (6).
2. A gas-liquid two-phase flowmeter according to claim 1, characterized in that: The fixing assembly (8) comprises a piston (82), a push rod (83), a boss (84), a support rod (86) and a spring (85). The cylinder (6) is horizontally mounted above and below the gas-liquid flow tube (3). A sliding chamber (62) is provided in the cylinder (6). One end of the sliding chamber (62) is connected to the air inlet (11). A piston (82) is slidably mounted in the sliding chamber (62). The piston (82) is connected to the push rod (83). The push rod (83) is provided with a plurality of bosses (84). The bosses (84) are inclined with a push surface (86). 65), a plurality of support rods (86) are vertically slidably mounted on the side wall of the cylinder (6), the support rods (86) penetrate the side wall of the cylinder (6), one end of the support rod (86) located inside the cylinder (6) is inclinedly provided with a force surface (864), a No. 1 spring (85) is coaxially mounted on the support rod (86), the two ends of the No. 1 spring (85) are respectively connected to the cylinder (6) and the support rod (86), the pushing surface (865) is in contact with the force surface (864), and the support rod (86) located outside the cylinder (6) is in contact with the gas-liquid flow tube (3).
3. A gas-liquid two-phase flowmeter according to claim 1, characterized in that: The vibration assembly (7) comprises a rotating seat (71), a rotating rod (72), a fan blade (73) and a protrusion (74); the cylinder (6) is flexibly connected to the shell (1); a vibration chamber (63) is provided in the cylinder (6); one end of the vibration chamber (63) is communicated with the sliding chamber (62); a rotating seat (71) is coaxially symmetrically installed in the vibration chamber (63); a rotating rod (72) is coaxially rotatably installed between the rotating seats (71); a radial plane of the rotating rod (72) is parallel to a horizontal radial plane of the gas-liquid flow tube (3); the fan blades (73) are evenly distributed in a ring shape at the center of the rotating rod (72); the rotating rod (72) is provided with fan-shaped protrusions (74) on the side walls between the fan blades (73) and the rotating seats (71) at both ends; one end of the vibration chamber (63) is communicated with the air outlet (31).
4. A gas-liquid two-phase flowmeter according to claim 2, characterized in that: The support rod (86) is Y-shaped, and includes a support portion (862), a sliding portion (861) and a contact portion (863). The support portion (862) is provided with a force surface (864). The support portion (862) is vertically slidably mounted with a sliding portion (861) on a radial plane of the gas-liquid flow tube (3). The support portion (862) and the sliding portion (861) are connected via a No. 2 spring (866). The sliding portion (861) is connected to a symmetrically arranged contact portion (863), and the contact portion (863) is in contact with the gas-liquid flow tube (3).
5. A gas-liquid two-phase flowmeter according to claim 1, characterized in that: The cylinder (6) is provided with an air outlet (61), the air outlet (61) is communicated with the vibration chamber (63), the air outlet (61) is communicated with the air outlet (31) through the air pipe (5), a pulse valve (9) is installed at the connection between the air outlet (61) and the air pipe (5), the pulse valve (9) comprises an air bag (91), a chassis (92), a rotating disk (93), a first torsion spring (95), a hinge (96) and a protruding rod (94), one end of the air bag (91) is connected to the air outlet The airbag (91) is connected to the air pipe (5), the other end of the airbag (91) is connected to the air pipe (5), a chassis (92) is installed in the port connecting the airbag (91) and the air pipe (5), a first vent hole (921) is provided at the center of the chassis (92), a plurality of guide grooves (922) are provided at the chassis (92), the guide grooves (922) are connected end to end, guide blocks (962) and sliders (961) are provided on the planes at both ends of the hinge (96), and two guide grooves (962) and sliders (961) are provided at the center of the turntable (93). A vent hole (941) is provided at one end of the turntable (93) with a circularly evenly distributed slide groove (942), a plurality of hinges (96) are evenly distributed in a circular manner between the chassis (92) and the turntable (93), the side walls of the hinges (96) are in contact with each other, the guide block (962) is slidably matched with the guide groove (922), the slider (961) is slidably matched with the slide groove (942), the number of the hinges (96) is the same as the number of the slide groove (942) and the guide groove (922), and the chassis The base (92) and the rotating disk (93) are fitted together, the base (92) and the rotating disk (93) are connected by a first torsion spring (95), a protruding rod (94) is provided on one end of the rotating disk (93), one end of the rotating rod (72) passes through the air outlet (61), a shifting rod (963) is provided on one end of the rotating rod (72) passing through the air outlet (61), the rotating rod (72) and the shifting rod (963) are connected by a second torsion spring (97), and the protruding rod (94) and the shifting rod (963) are fitted together.
6. A gas-liquid two-phase flowmeter according to claim 5, characterized in that: The direction of the air flow blown out of the air blowing port (31) is parallel to the axial direction of the air-liquid flow tube (3).
7. A gas-liquid two-phase flowmeter according to claim 7, characterized in that: The inner wall of the air blowing port (31) is evenly distributed with inclined guide vanes (81), and the angle between the inclined guide vanes (81) and the axis of the air blowing port (31) is α, wherein 10°<α<40°.
8. A gas-liquid two-phase flow meter according to claim 8, characterized in that: An opening and closing valve (10) is provided at the connection between the blowing port (31) and the air pipe (5), and the opening and closing valve (10) comprises a clamping ring (101), a valve core (104), a connecting rod (103), a limiting ring (107) and a No. 3 spring (108). The inner wall of the air pipe (5) is connected with the clamping ring (101), the axis of the valve core (104) is connected to one end of the connecting rod (103), and the other end of the connecting rod (103) is coaxially connected to the limiting ring (107), and the limiting ring (107) is in contact with the inner wall of the air pipe (5). A third spring (108) is coaxially mounted on the valve core (103), and the two ends of the third spring (108) are connected by a limit ring (107) and a clamping ring (101), respectively. The clamping ring is provided with a first inclined surface (102), and a second inclined surface (105) is provided on the valve core (104). An inclined groove (106) is provided on the side of the valve core (104), and the inclined groove (106) and the inclined guide plate (81) have an equal angle with the axis of the blowing port (31), and the first inclined surface (102) and the second inclined surface (105) are in contact with each other.