A metering wedge flowmeter

Abstract

The utility model relates to flow measurement technical field discloses a kind of accurate wedge flowmeter, including measuring tube, the outer wall of measuring tube is fixedly connected with square box one, the inside fixedly connected with motor one of square box one, the drive end fixedly connected with transmission rod one of motor one, the outer wall rotationally connected with connecting rod one of transmission rod one, the outer wall rotationally connected with transmission rod two of connecting rod one, the inner wall fixedly connected with fixed link one of square box one, the inner wall fixedly connected with fixed block one of square box one, the inside slidingly connected with connecting rod two of fixed block one. In the utility model, by up and down adjusting wedge block, can make the interaction of wedge block and fluid reach optimum state, let differential pressure signal and the corresponding relationship of flow be more accurate, adjust measuring performance by adjusting wedge block, make it more easily satisfy calibration requirement, improve the efficiency and accuracy of calibration.

Description

Technical Field

[0001] This utility model relates to the field of flow measurement technology, and in particular to a wedge flow meter with accurate measurement. Background Technology

[0002] The wedge flow meter is a new type of throttling differential pressure flow measurement instrument based on the differential pressure principle. Its sensing element is a V-shaped wedge with a smooth apex pointing downwards, allowing liquids containing suspended particles or viscous liquids to pass through smoothly. It has self-cleaning ability, no stagnant zone, and is suitable for high viscosity, low Reynolds number fluids. It can measure various media such as mud, coal tar pitch, etc. Even at very low Reynolds numbers, the flow rate and differential pressure still maintain a square root relationship. The calibration accuracy can reach 0.5 grade. It has a simple structure, is easy to install, use and maintain, and has low pressure loss. It is widely used in petroleum, chemical, power and sewage treatment fields.

[0003] When fluid passes through a V-shaped wedge in a pipe, the throttling effect of the wedge creates a differential pressure on its front and rear sides that is proportional to the square of the volumetric flow rate. This differential pressure is converted into an electrical signal by a differential pressure transmitter, which is then used to calculate the flow rate. Its function is to accurately measure the flow rate of fluids. It can be used to measure liquids, gases, vapors, slurries, and media containing particles and dust, and is particularly suitable for fluids with high viscosity, low Reynolds number, and suspended particles. It is widely used in industries such as petroleum and chemical engineering.

[0004] In existing technologies, when the physical properties of the measured medium, such as viscosity and density, change, it is impossible to optimize the measurement by adjusting the wedge. As the viscosity of the medium increases, the fluid resistance increases, and not adjusting the wedge will increase the measurement error. Changes in parameters such as pressure and temperature in the pipeline will affect the fluid state and flow rate. Therefore, a wedge flow meter with accurate measurement is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a wedge flow meter with accurate measurement, aiming to improve the problems of limited measurement accuracy, inconvenient maintenance and calibration, and fixed measurement range in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A wedge flow meter with accurate measurement includes a measuring tube, a square box fixedly connected to the outer wall of the measuring tube, a motor fixedly connected inside the square box, a transmission rod fixedly connected to the drive end of the motor, a connecting rod rotatably connected to the outer wall of the transmission rod, a transmission rod rotatably connected to the outer wall of the connecting rod, a fixing rod fixedly connected to the inner wall of the square box, a fixing block fixedly connected to the inner wall of the square box, a connecting rod slidably connected inside the fixing block, a connecting plate fixedly connected to the outer wall of the connecting rod, a spring fixedly connected to the top of the fixing block, a wedge fixedly connected to the bottom of the connecting rod, and fixing components for quick installation installed at both ends of the measuring tube.

[0008] As a further description of the above technical solution:

[0009] The fixing assembly includes two mounting plates. The inner walls of the two mounting plates are fixedly connected to the outer wall of the measuring tube. A square box II is fixedly connected to the top of each of the two mounting plates. A motor II is fixedly connected to the inner wall of each of the two square boxes II. A gear is fixedly connected to the drive end of the motor II. A fixing rod II is fixedly connected to the inside of the square box II. A connecting rod III is rotatably connected to the outer wall of the fixing rod II. A transmission rod III is rotatably connected to both ends of the connecting rod III. A slider is rotatably connected to the outer wall of each of the two transmission rod III. A rack is fixedly connected to the outer wall of one of the sliders. A fixing block II is fixedly connected to the outer wall of both sliders. A fixing rod III is fixedly connected to the inside of each of the two fixing blocks II. Two support plates are fixedly connected to the outer wall of each mounting plate. A guide rod is fixedly connected to the inside of each of the two support plates. A clamp is fixedly connected to the bottom end of each of the two fixing rod III. A pipe is fixedly connected to the adjacent side of the two clamps.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the fixed rod one is rotatably connected to the inner wall of the transmission rod two, and the outer wall of the transmission rod two is in contact with the top end of the connecting plate one;

[0012] As a further description of the above technical solution:

[0013] The other end of the spring is fixedly connected to the outer wall of the connecting rod 2, and the outer wall of the wedge is slidably connected to the inner wall of the measuring tube;

[0014] As a further description of the above technical solution:

[0015] The outer teeth of the gear are meshed with the outer teeth of the rack, and the outer walls of the two sliders are slidably connected to the inner wall of the square box II.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the fixing rod three is slidably connected to the inner wall of the square box two, and the inner wall of the square box two is provided with a sliding groove;

[0018] As a further description of the above technical solution:

[0019] The inner walls of both clamps are slidably connected to the outer walls of the two guide rods, and the outer walls of the two clamps are slidably connected to the outer wall of the mounting plate;

[0020] As a further description of the above technical solution:

[0021] The left and right ends of the measuring tube are in contact with the outer walls of the two pipes, and the outer wall of the second fixing block is slidably connected to the inner wall of the second square box.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, after the motor starts, the drive end drives the transmission rod to rotate. Power is transmitted through the rotating connecting rod and the transmission rod, causing the transmission rod to push the connecting rod to slide within the fixed block, thus raising and lowering the wedge. The spring acts as a buffer and reset mechanism, thereby changing the flow area within the measuring tube and achieving the raising and lowering of the wedge. Different flow ranges have different requirements for the wedge position. By adjusting the wedge up and down, the interaction between the wedge and the fluid can be optimized, making the correspondence between the differential pressure signal and the flow rate more accurate. Adjusting the wedge adjusts the measurement performance, making it easier to meet calibration requirements and improving calibration efficiency and accuracy.

[0024] 2. In this utility model, the second motor drives the gear to rotate, meshing with the rack and pinion to move the slider. The slider transmits power through the third transmission rod and the third connecting rod, causing the second fixed block to move along the guide rod. The third fixed rod inside the second fixed block drives the clamp to clamp or release the pipe, realizing the fixing or disassembly of the pipe and the measuring tube, improving the efficiency and reliability of equipment operation and maintenance. In maintenance scenarios, its quick-install flange, clamp-type connectors and other structures can significantly shorten the disassembly time, ensuring that the equipment and the pipe are tightly and accurately connected after each installation, continuously maintaining high-precision measurement, and ensuring the long-term stable operation of the flow meter. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a wedge flow meter with accurate metering proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the measuring tube of a wedge flowmeter with accurate metering proposed in this utility model;

[0027] Figure 3This is a schematic diagram of the square box of a wedge flowmeter with accurate metering proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the square box of a wedge flow meter with accurate measurement proposed in this utility model.

[0029] Legend:

[0030] 1. Measuring tube; 2. Square box one; 3. Motor one; 4. Transmission rod one; 5. Connecting rod one; 6. Transmission rod two; 7. Fixing rod one; 8. Fixing block one; 9. Connecting rod two; 10. Connecting plate one; 11. Spring; 12. Wedge block; 13. Mounting plate; 14. Square box two; 15. Motor two; 16. Gear; 17. Fixing rod two; 18. Connecting rod three; 19. Transmission rod three; 20. Slider; 21. Rack; 22. Fixing block two; 23. Fixing rod three; 24. Support plate; 25. Guide rod; 26. Clamp; 27. Pipe. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1 to 3This utility model provides an embodiment of a wedge flow meter with accurate measurement, including a measuring tube 1. The measuring tube 1 provides installation space for subsequent components, preventing shaking or displacement during operation. A square box 2 is fixedly connected to the outer wall of the measuring tube 1, providing a rigid mounting base for the square box 2. This fixed connection ensures the stability of the square box 2 during flow meter operation, preventing displacement due to fluid impact or vibration. A motor 3 is fixedly connected inside the square box 2, providing installation space for the motor 3 and preventing shaking or offset during operation. A transmission rod 4 is fixedly connected to the drive end of the motor 3. Motor 3 serves as the drive source, driving transmission rod 4 to operate and transmitting power to subsequent components. Connecting rod 5 is rotatably connected to the outer wall of transmission rod 4, providing a fulcrum for the rotation of connecting rod 5 and enabling the conversion of power transmission mode. Transmission rod 6 is rotatably connected to the outer wall of connecting rod 5, providing a rotation connection point for transmission rod 6 and transmitting the swinging motion of connecting rod 5 to transmission rod 6, driving subsequent components to operate. Fixed rod 7 is fixedly connected to the inner wall of square box 2, providing support for fixed rod 7 and ensuring stability for subsequent components, preventing transmission sway.

[0033] A fixing block 8 is fixedly connected to the inner wall of the square box 2, providing a stable installation base for the fixing block 8 and ensuring stability for subsequent components. A connecting rod 9 is slidably connected inside the fixing block 8, providing a sliding track for the connecting rod 9 to prevent shaking during operation. A connecting plate 10 is fixedly connected to the outer wall of the connecting rod 9, providing an installation base for the connecting plate 10. The connecting plate 10 is moved up and down by the transmission rod 6. A spring 11 is fixedly connected to the top of the fixing block 8, providing installation space for the spring 11 and ensuring stable operation of subsequent components. A wedge 12 is fixedly connected to the bottom of the connecting rod 9, providing the wedge 12 to move up and down during component operation. Fixing components for quick installation are installed at both ends of the measuring tube 1, providing installation interfaces for the fixing components to prevent fluid leakage or measurement errors due to loose installation, thus improving the practicality and reliability of the device.

[0034] Reference Figure 3 and Figure 4The fixing assembly includes two mounting plates 13. The inner walls of the two mounting plates 13 are fixedly connected to the outer wall of the measuring tube 1. The outer wall of the measuring tube 1 provides a stable support base for the mounting plates 13, ensuring that no relative displacement occurs during the operation of the fixing assembly and providing a reliable installation platform for subsequent components. A square box 2 14 is fixedly connected to the top of each of the two mounting plates 13. The top of the mounting plates 13 provides installation space for the square box 2 14. The fixed connection ensures that the square box 2 14 remains stable during the operation of the fixing assembly, preventing shaking due to external forces. A motor 2 15 is fixedly connected to the inner wall of each of the two square box 2 14. The inner wall of the square box 2 14 provides installation space for the motor 2 15, preventing it from shaking during operation. Displacement or vibration occurs, ensuring normal power transmission. The drive end of motor 2 15 is fixedly connected to gear 16, which provides a rotational power source for gear 16, converting the rotational motion of motor 2 15 into the mechanical action of subsequent components, ensuring the stability of power transmission. The inside of square box 2 14 is fixedly connected to fixed rod 2 17, which provides a support point for fixed rod 2 17, ensuring the stable operation of subsequent components. The outer wall of fixed rod 2 17 is rotatably connected to connecting rod 3 18, which provides a rotation fulcrum for connecting rod 3 18, allowing connecting rod 3 18 to rotate around fixed rod 2 17, realizing the conversion of power transmission form.

[0035] Both ends of the connecting rod 18 are rotatably connected to the transmission rod 19. The two ends of the connecting rod 18 provide rotational connection points for the transmission rod 19, forming a linkage transmission structure through a hinged design. This transmits the swinging motion of the connecting rod 18 to the transmission rod 19, transferring power to subsequent components. The outer walls of both transmission rods 19 are rotatably connected to sliders 20, providing a rotational connection structure for the sliders 20. This converts the swinging motion of the transmission rods 19 into the linear motion of the sliders 20, achieving effective power transmission. One slider 20 has a rack 21 fixedly connected to its outer wall, providing a mounting base for the rack 21, through which power is transmitted. The outer walls of both sliders 20 are fixedly connected to fixing blocks 22, providing mounting support and driving the fixing blocks 22 to move synchronously. The interiors of both fixing blocks 22 are fixedly connected to... When the third rod 23 and the second fixing block 22 move, the third fixing rod 23 moves synchronously. Two support plates 24 are fixedly connected to the outer wall of the mounting plate 13. The mounting plate 13 provides installation space and stability for the support plates 24, preventing shaking or displacement of subsequent components. Guide rods 25 are fixedly connected inside the two support plates 24, providing installation space for the guide rods 25 and providing stability for subsequent components. Clamps 26 are fixedly connected to the bottom of the two third fixing rods 23. When the third fixing rod 23 moves, it drives the clamps 26 to move synchronously through the fixed connection with the clamps 26. Pipes 27 are fixedly connected to the adjacent side of the two clamps 26. The adjacent side of the clamps 26 provides a connection and fixing point for the pipes 27. The pipes 27 are firmly clamped through the fixed connection, ensuring a sealed connection between the measuring tube 1 and the pipes 27, preventing fluid leakage, and facilitating quick disassembly and assembly, thus improving the installation efficiency and ease of use of the flow meter.

[0036] Reference Figures 2 to 4The outer wall of the fixed rod 7 is rotatably connected to the inner wall of the transmission rod 6. The outer wall of the fixed rod 7 provides a fulcrum for the transmission rod 6, ensuring stability during operation. The outer wall of the transmission rod 6 contacts the top of the connecting plate 10. When the transmission rod 6 moves, it pushes the connecting plate 10, converting the rotational motion into linear motion, ensuring the smoothness of the wedge block 12's lifting and lowering action. The other end of the spring 11 is fixedly connected to the outer wall of the connecting rod 9. The outer wall of the connecting rod 9 provides a fixed connection point for the spring 11, providing buffering and recovery during the lifting and lowering of the wedge block 12. The positioning function prevents the wedge 12 from shifting due to fluid impact. The outer wall of the wedge 12 is slidably connected to the inner wall of the measuring tube 1. The inner wall of the measuring tube 1 provides a sliding guide surface for the wedge 12, ensuring that the wedge 12 slides smoothly along the inner wall of the measuring tube 1 during the lifting and lowering process, and limiting its radial displacement. The outer teeth of the gear 16 are meshed with the outer teeth of the rack 21. The meshing structure of the gear 16 and the rack 21 converts the rotational motion of the motor 15 into the linear motion of the slider 20. The outer walls of both sliders 20 are slidably connected to the inner wall of the square box 14.

[0037] The inner wall of the square box 214 provides a sliding track for the slider 20, allowing the slider 20 to slide smoothly within the square box 214 and ensuring the stability of the linear motion of the slider 20. The outer wall of the fixing rod 23 is slidably connected to the inner wall of the square box 214, providing a sliding guide for the fixing rod 23 and limiting its movement trajectory, allowing it to slide smoothly within the square box 214. The inner wall of the square box 214 has a groove, providing a precise sliding channel for the slider 20 and the fixing rod 23. The inner walls of the two clamps 26 are slidably connected to the outer walls of the two guide rods 25, providing sliding constraints for the clamps 26 and ensuring that the clamps 26 clamp smoothly. To ensure the accuracy and stability of the flow measurement, the outer walls of the two clamps 26 are slidably connected to the outer wall of the mounting plate 13. The outer wall of the mounting plate 13 provides sliding support for the clamps 26, ensuring that the clamps 26 maintain horizontal stability during movement and preventing tilting. The left and right ends of the measuring tube 1 are in contact with the outer walls of the two pipes 27, forming a sealed contact structure between the two ends of the measuring tube 1 and the outer walls of the pipes 27 to prevent fluid leakage and ensure the accuracy of flow measurement. The outer wall of the second fixed block 22 is slidably connected to the inner wall of the second square box 14. The inner wall of the second square box 14 provides a sliding track for the second fixed block 22, allowing it to slide smoothly within the second square box 14 and ensuring that the second fixed block 22 can accurately transmit the movement of the slider 20.

[0038] Working principle: When the wedge 12 needs to be adjusted, the motor 3 inside the square box 2 starts. The motor 3 drives the transmission rod 4 connected to the drive end to rotate. The transmission rod 4 drives the transmission rod 6 to swing on the outer wall of the fixed rod 7 through the connecting rod 5 connected to the outer wall. This causes the outer wall of the transmission rod 6 to push the connecting plate 10 fixed on the outer wall of the connecting rod 9 to move up and down. This causes the connecting rod 9 to move inside the fixed block 8, which in turn causes the wedge 12 at the bottom to rise and fall on the inner wall of the measuring tube 1. At the same time, the spring 11 at the top of the fixed block 8 provides buffering and restoring force for the connecting rod 9. By changing the flow area inside the measuring tube 1 through the wedge 12, the pressure difference generated by the fluid flowing through the wedge 12 is used to achieve accurate flow measurement.

[0039] When it is necessary to fix the pipe 27, the motor 2 15 inside the square box 2 14 starts. The motor 2 15 drives the gear 16 connected to the drive end to rotate. Through the meshing relationship with the rack 21, the slider 20 with the rack 21 fixed on it slides on the inner wall of the square box 2 14. When the slider 20 slides, it drives the moving transmission rod 3 19 to move. The transmission rod 3 19 drives the connecting rod 3 18 to swing around the fixed rod 2 17, so that the connecting rod 3 18 drives another transmission rod 3 19 to move, and then drives another slider 20 to move synchronously. The two sliders 20 drive the fixed block 2 22 to slide along the inner wall of the square box 2 14. When the fixed block 2 22 moves, it drives the internal fixed rod 3 23 to move, so that the fixed rod 3 23 drives the clamp 26 to slide on the outer wall of the guide rod 25, so that the clamp 26 can clamp or release the pipe 27, realizing the rapid and stable connection and disassembly of the measuring tube 1 and the pipe 27.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metering accurate wedge flowmeter comprising a measuring tube (1), characterized in that: The outer wall of the measuring tube (1) is fixedly connected to a square box (2). The inside of the square box (2) is fixedly connected to a motor (3). The drive end of the motor (3) is fixedly connected to a transmission rod (4). The outer wall of the transmission rod (4) is rotatably connected to a connecting rod (5). The outer wall of the connecting rod (5) is rotatably connected to a transmission rod (6). The inner wall of the square box (2) is fixedly connected to a fixing rod (7). The inner wall of the square box (2) is fixedly connected to a fixing block (8). The inside of the fixing block (8) is slidably connected to a connecting rod (9). The outer wall of the connecting rod (9) is fixedly connected to a connecting plate (10). The top of the fixing block (8) is fixedly connected to a spring (11). The bottom of the connecting rod (9) is fixedly connected to a wedge (12). The two ends of the measuring tube (1) are equipped with fixing components for quick installation.

2. The wedge flow meter with accurate metering according to claim 1, characterized in that: The fixing assembly includes two mounting plates (13), the inner walls of which are fixedly connected to the outer wall of the measuring tube (1). A square box (14) is fixedly connected to the top of each of the two mounting plates (13). A motor (15) is fixedly connected to the inner wall of each of the two square boxes (14). A gear (16) is fixedly connected to the drive end of the motor (15). A fixing rod (17) is fixedly connected inside the square box (14). A connecting rod (18) is rotatably connected to the outer wall of the fixing rod (17). A transmission rod (19) is rotatably connected to both ends of the connecting rod (18). The outer walls of the transmission rods (19) are rotatably connected to sliders (20), one of the sliders (20) is fixedly connected to a rack (21), the outer walls of the two sliders (20) are fixedly connected to fixing blocks (22), the interiors of the two fixing blocks (22) are fixedly connected to fixing rods (23), the outer walls of the mounting plate (13) are fixedly connected to two support plates (24), the interiors of the two support plates (24) are fixedly connected to guide rods (25), the bottom ends of the two fixing rods (23) are fixedly connected to clamps (26), and the adjacent sides of the two clamps (26) are fixedly connected to pipes (27).

3. The wedge flow meter with accurate metering according to claim 1, characterized in that: The outer wall of the fixed rod 1 (7) is rotatably connected to the inner wall of the transmission rod 2 (6), and the outer wall of the transmission rod 2 (6) is in contact with the top end of the connecting plate 1 (10).

4. The wedge flow meter with accurate metering according to claim 1, characterized in that: The other end of the spring (11) is fixedly connected to the outer wall of the connecting rod (9), and the outer wall of the wedge (12) is slidably connected to the inner wall of the measuring tube (1).

5. A wedge flow meter with accurate metering according to claim 2, characterized in that: The outer teeth of the gear (16) are meshed with the outer teeth of the rack (21), and the outer walls of the two sliders (20) are slidably connected to the inner wall of the square box (14).

6. The wedge flow meter with accurate metering according to claim 2, characterized in that: The outer wall of the fixed rod three (23) is slidably connected to the inner wall of the square box two (14), and the inner wall of the square box two (14) is provided with a sliding groove.

7. The wedge flow meter with accurate metering according to claim 2, characterized in that: The inner walls of the two clamps (26) are slidably connected to the outer walls of the two guide rods (25), and the outer walls of the two clamps (26) are slidably connected to the outer wall of the mounting plate (13).

8. A wedge flow meter with accurate metering according to claim 2, characterized in that: The left and right ends of the measuring tube (1) are in contact with the outer walls of the two pipes (27), and the outer wall of the fixing block two (22) is slidably connected to the inner wall of the square box two (14).

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