Flow measuring device for a meter and method of measuring

Abstract

The application relates to the field of flow measurement, and discloses a flow measurement device of a meter and a measurement method thereof. The device comprises a mounting body and a mounting plate. The outer part of the mounting body is threadedly connected with a fixing bolt through the outer part of the mounting plate, and the inner part of the mounting body is fixedly connected with a limiting body. The mounting body and the mounting plate are arranged, so that the mounting body and the mounting plate can be fixed on the outer wall of a pipeline by the fixing bolt. The ultrasonic meter body and the clamping block arranged simultaneously can be fixed in the inner part of the mounting body by the structure in the inner part of the limiting body. The flow measurement device can be conveniently installed on the outer wall of a fluid pipeline. The ultrasonic measurement mode is adopted, so that the device can be conveniently installed without interrupting the pipeline. After the mounting body and the mounting plate are installed, the ultrasonic meter body can be installed only by pressing, so that the problem that the traditional flow measurement device is inconvenient to install is solved.

Description

Technical Field

[0001] This invention relates to the field of flow measurement technology, specifically to a flow measurement device and method for a meter. Background Technology

[0002] A flow meter is a device used to accurately measure the flow rate of liquids or gases. Its core function is to achieve quantitative control and measurement of flow rate, and it is widely used in industrial production, energy management, trade settlement, and safety monitoring. A differential pressure flow measurement device is disclosed in publication number CN108088508B, belonging to the field of flow measurement technology. It includes an orifice plate and a three-valve manifold. The orifice plate has pressure taps, and the three-valve manifold includes a valve body and valve discs. The valve body has a fluid passage with a fluid inlet and an outlet. The inlet end of the fluid inlet has a slot, the cross-sectional area of ​​which is larger than that of the fluid inlet. The valve body is welded to the orifice plate, and the fluid inlet and pressure taps are interconnected. This reduces the number of welds, decreases the probability of leakage, lowers production and maintenance costs, and results in a more compact structure with less space required. The slot allows for a certain amount of misalignment during alignment of the fluid inlet of the valve body with the pressure tap on the orifice plate, reducing positioning difficulty, saving time and effort, and improving production efficiency.

[0003] The inventors of this application discovered in their research that the core defect of the aforementioned prior art is that its flow measurement device requires the fluid inside the pipe to be cut off during use, and its installation method is relatively complicated and inconvenient for the installation of the device. Summary of the Invention

[0004] This invention provides a flow measurement device and method for a meter, which solves the problem that the installation of flow measurement devices is complicated and inconvenient, and achieves the effect of convenient installation of flow measurement structures.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flow measurement device for a meter, comprising a mounting body and a mounting plate. A fixing bolt is externally connected to the mounting body via an external thread on the mounting plate. A limiting body is fixedly connected internally to the mounting body. A first telescopic rod is fixedly connected internally to the limiting body. A pressing plate is fixedly connected to the top of the first telescopic rod. A first spring is fixedly connected to the bottom of the pressing plate via an internal connection to the limiting body. A pressing block is fixedly connected through the limiting body to the top of the pressing plate. Insertion holes are provided on both sides of the pressing block. A locking rod is inserted into the pressing block. A hook is fixedly connected to the bottom of the pressing plate. An ultrasonic meter body is slidably connected internally to the mounting body. A locking block is fixedly connected to one side of the ultrasonic meter body.

[0006] By adopting the above technical solution, the flow measurement device can be conveniently installed on the outer wall of the pipe, and the ultrasonic meter body can be conveniently installed inside the installation body by utilizing the internal structure of the limiting body, thereby achieving the function of convenient installation of the flow measurement device.

[0007] Preferably, a pop-out body is fixedly connected inside the mounting body. A sliding groove is provided on one side of the pop-out body. A guide rod is fixedly connected inside the pop-out body. An outer slider is slidably connected to the outside of the guide rod. A return spring is fixedly connected to one side of the outer slider through the inside of the pop-out body. A rotating block is fixedly connected to the outside of the outer slider. A support rod is rotatably connected to the outside of the rotating block.

[0008] Preferably, one end of the support rod is rotatably connected to an abutment block, the abutment block is slidably connected to the outside of the ejector body, a sliding plate is fixedly connected to one side of the abutment block, and a pressing rod is fixedly connected to one side of the sliding plate.

[0009] By adopting the above technical solution, the main body of the ultrasonic meter can be ejected by the abutment block after installation, thereby facilitating the detachment of the flow measurement device.

[0010] Preferably, a second telescopic rod is fixedly connected inside the mounting body, and an auxiliary slider is fixedly connected to one end of the second telescopic rod.

[0011] Preferably, a second spring is fixedly connected to one side of the auxiliary slider through the interior of the mounting body, and a first toothed rod is fixedly connected to the other side of the auxiliary slider.

[0012] Preferably, the mounting body is internally rotatably connected to a transmission gear set, one side of which meshes with one side of the first gear, and the mounting body is internally rotatably connected to a meshing gear set.

[0013] Preferably, the meshing gear set is externally meshed with a transmission chain via the external transmission gear set, and an external gear is fixedly connected to the external side of the meshing gear set.

[0014] Preferably, the mounting body has an internal sliding connection to an abutment body, and a second toothed rod is fixedly connected to one side of the abutment body, with one side of the second toothed rod meshing with one side of an external gear.

[0015] Preferably, a third telescopic rod is fixedly connected inside the abutting body, one end of the third telescopic rod is fixedly connected to an abutting rod, and one side of the abutting rod is fixedly connected to a third spring through the inside of the abutting body.

[0016] Preferably, a measurement method for a measuring instrument includes the following steps: S1. Perform Discrete Fourier Transform on the I and Q paths of a frame of ADC sampling signal to obtain their respective phase values, converting the time-domain signal into frequency-domain information for easier subsequent analysis. S2. Subtract the phases of the I path and the Q path to obtain the original phase difference. This phase difference is closely related to the propagation state of sound waves in the fluid and is the basic data reflecting the change in flow velocity. S3. Based on the preset target value, the phase difference is initially screened to eliminate obviously abnormal data points. Then, the phase difference after the initial screening is further filtered to remove interference, improve the data purity, and significantly enhance the robustness of the system in noisy environments. S4. Using the phase difference after interference removal, combined with the ultrasonic propagation model, the flow velocity value of the current frame is deduced. Since there is a linear relationship between the phase difference and the Doppler frequency shift or time difference, the flow velocity can be accurately calculated through the calibration formula.

[0017] By adopting the above technical solution, the flow measurement device can better adapt to the pipeline environment after installation, effectively reduce the impact of pipeline vibration on the flow detection device, and protect the internal structure.

[0018] This invention provides a flow measurement device for a meter. It has the following advantages: 1. This invention, by setting up an installation body and an installation plate, allows the installation body and installation plate to be fixed to the outer wall of the pipe using fixing bolts. At the same time, the ultrasonic meter body and the snap-fit ​​block can be fixed inside the installation body using the internal structure of the limiting body. This allows the flow measurement device to be conveniently installed on the outer wall of the fluid pipe. Furthermore, by using ultrasonic measurement, the device can be easily installed without interrupting the flow in the pipe. After the installation body and installation plate are installed, the ultrasonic meter body can be installed simply by pressing, solving the problem of the inconvenience of traditional flow measurement devices in terms of installation.

[0019] 2. This invention, by setting up a pop-out main body, allows the ultrasonic measuring instrument body to be installed and simultaneously pressed and retracted into the pop-out main body by the pressing and abutting block. This causes the pressing block to pop out the ultrasonic measuring instrument body after pressing, making the disassembly of the ultrasonic measuring instrument body more convenient and quick. This facilitates the separation of the ultrasonic measuring instrument body from the installation body and solves the problem that it is inconvenient for the ultrasonic measuring instrument body to detach from the installation body after sliding installation.

[0020] 3. This invention, by setting up multiple gear sets and cooperating with a chain structure, enables the ultrasonic meter body to move synchronously during installation, driving the abutment rod to abut against both sides of the ultrasonic meter body. This ensures that after installation, the ultrasonic meter body's side structures are fixed by the abutment rod, effectively reducing the impact between the outer wall of the ultrasonic meter body and the interior of the installation body caused by the high-frequency vibration of the pipe after the liquid flows inside. This solves the problem of damage to the internal components of the flow measurement device due to impact forces caused by pipe vibration. Attached Figure Description

[0021] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main body of the ultrasonic meter of the present invention; Figure 3 This is a schematic diagram of the mounting body of the present invention; Figure 4 This is a schematic diagram of the limiting body of the present invention; Figure 5 This is a side view of the mounting body of the present invention; Figure 6 This is a cross-sectional view of the mounting body of the present invention; Figure 7 This is a schematic diagram of the main body of the pop-up device of the present invention; Figure 8 This is an enlarged view of point A in the present invention; Figure 9 This is an enlarged view of section B of the present invention; Figure 10 This is an enlarged view of point C in the present invention; Figure 11 This is an enlarged view of point D in the present invention.

[0022] The components include: 1. Mounting body; 2. Mounting plate; 3. Fixing bolts; 4. Limiting body; 5. Ultrasonic measuring instrument body; 6. Snap-fit ​​block; 7. Pop-out body; 8. First telescopic rod; 9. Pressing plate; 10. Pressing block; 11. Insertion hole; 12. Locking rod; 13. First spring; 14. Hook; 15. Sliding groove; 16. Guide rod; 17. External slider; 18. Return spring; 19. Rotating block; 20. Support rod; 21. Abutment block; 22. Sliding plate; 23. Pressing rod; 24. Second telescopic rod; 25. Second spring; 26. Auxiliary slider; 27. First gear; 28. Transmission gear set; 29. ​​Transmission chain; 30. Meshing gear set; 31. External gear; 32. Abutment body; 33. Second gear; 34. Third telescopic rod; 35. Abutment rod; 36. Third spring. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see the appendix Figure 1 - Appendix Figure 11 This invention provides a flow measurement device for a meter, including a mounting body 1 and a mounting plate 2. A fixing bolt 3 is threadedly connected to the outside of the mounting body 1 via the external thread of the mounting plate 2. A limiting body 4 is fixedly connected inside the mounting body 1. A first telescopic rod 8 is fixedly connected inside the limiting body 4. A pressing plate 9 is fixedly connected to the top of the first telescopic rod 8. A first spring 13 is fixedly connected to the bottom of the pressing plate 9 via the inside of the limiting body 4. A pressing block 10 is fixedly connected to the top of the pressing plate 9 through the limiting body 4. Insertion holes 11 are provided on both sides of the pressing block 10, and a locking rod 12 is inserted into the pressing block 10. A hook 14 is fixedly connected to the bottom of the pressing plate 9. An ultrasonic meter body 5 is slidably connected inside the mounting body 1, and a snap-fit ​​block 6 is fixedly connected to one side of the ultrasonic meter body 5.

[0025] Specifically, the mounting body 1 and mounting plate 2 are fixed to the outer wall of the pipe using fixing bolts 3. Then, the rear side of the ultrasonic meter body 5 is pressed into the interior of the mounting body 1. During this process, the snap-fit ​​block 6 is inserted into the interior of the limiting body 4. By manually pushing the pressing block 10 to retract into the interior of the limiting body 4, the hook 14 is lowered. At the same time, the first telescopic rod 8 and the first spring 13 are in a compressed state. After the ultrasonic meter body 5 is fully installed, the pressing block 10 is released, and the hook 14 is reset and snapped into the interior of the snap-fit ​​block 6, thereby realizing the function of limiting the ultrasonic meter body 5.

[0026] Please see the appendix Figure 3 and attached Figure 9 The installation body 1 is internally fixedly connected to a pop-out body 7. A sliding groove 15 is provided on one side of the pop-out body 7. A guide rod 16 is internally fixedly connected to the pop-out body 7. An outer slider 17 is slidably connected to the outside of the guide rod 16. A return spring 18 is internally fixedly connected to one side of the outer slider 17. A rotating block 19 is externally fixedly connected to the outside of the outer slider 17. A support rod 20 is rotatably connected to the outside of the rotating block 19. An abutment block 21 is rotatably connected to one end of the support rod 20. The abutment block 21 is slidably connected to the inside of the pop-out body 7. A sliding plate 22 is fixedly connected to one side of the abutment block 21. A pressing rod 23 is fixedly connected to one side of the sliding plate 22.

[0027] Specifically, during the pressing process of the ultrasonic meter body 5, the abutment block 21 is abutted by the ultrasonic meter body 5, which causes the abutment block 21 to retract into the interior of the ejector body 7. At the same time, after the support rod 20 rotates, the outer slider 17 slides outside the guide rod 16, and the reset spring 18 is in a compressed state. As a result, after the pressing block 10 is pressed, the hook 14 no longer limits the locking block 6, the reset spring 18 resets, and the abutment block 21 pushes the ultrasonic meter body 5 out of the interior of the installation body 1, thereby facilitating the removal of the ultrasonic meter body 5. During this process, the sliding plate 22 and the pressing rod 23 are pushed by force.

[0028] Please see the appendix Figure 6 and attached Figure 10 The mounting body 1 has a second telescopic rod 24 fixedly connected inside. An auxiliary slider 26 is fixedly connected to one end of the second telescopic rod 24. A second spring 25 is fixedly connected to one side of the auxiliary slider 26 via the interior of the mounting body 1. A first toothed rod 27 is fixedly connected to the other side of the auxiliary slider 26. A transmission gear set 28 is rotatably connected inside the mounting body 1. One side of the transmission gear set 28 meshes with one side of the first toothed rod 27. A meshing gear set 30 is rotatably connected inside the mounting body 1. The meshing gear set 30 is externally connected via a transmission gear set 27. The gear set 28 is externally meshed with a transmission chain 29. The meshing gear set 30 is externally fixedly connected with an external gear 31. The mounting body 1 is internally slidably connected with an abutment body 32. A second rack 33 is fixedly connected to one side of the abutment body 32. One side of the second rack 33 meshes with one side of the external gear 31. A third telescopic rod 34 is fixedly connected to the inside of the abutment body 32. One end of the third telescopic rod 34 is fixedly connected with an abutment rod 35. One side of the abutment rod 35 is fixedly connected to a third spring 36 through the inside of the abutment body 32.

[0029] Specifically, during the installation of the ultrasonic meter body 5, the pressing rod 23 moves inside the installation body 1 and contacts the auxiliary slider 26. The auxiliary slider 26 drives the first gear 27 to move. After the transmission gear set 28 rotates, it drives the transmission chain 29 and the meshing gear set 30 to rotate. At the same time, after the external gear 31 rotates, it drives the second gear 33 and the abutting body 32 to move until the abutting rod 35 abuts against both sides of the ultrasonic meter body 5, reducing the impact of the ultrasonic meter body 5 inside the installation body 1.

[0030] A measurement method for a measuring instrument includes the following steps: S1. Perform Discrete Fourier Transform on the I and Q paths of a frame of ADC sampling signal to obtain their respective phase values, converting the time-domain signal into frequency-domain information for easier subsequent analysis. S2. Subtract the phases of the I path and the Q path to obtain the original phase difference. This phase difference is closely related to the propagation state of sound waves in the fluid and is the basic data reflecting the change in flow velocity. S3. Based on the preset target value, the phase difference is initially screened to eliminate obviously abnormal data points. Then, the phase difference after the initial screening is further filtered to remove interference, improve the data purity, and significantly enhance the robustness of the system in noisy environments. S4. Using the phase difference after interference removal, combined with the ultrasonic propagation model, the flow velocity value of the current frame is deduced. Since there is a linear relationship between the phase difference and the Doppler frequency shift or time difference, the flow velocity can be accurately calculated through the calibration formula.

[0031] Specifically, the mounting body 1 and mounting plate 2 are fixed to the outer wall of the pipe using fixing bolts 3. Then, the rear side of the ultrasonic meter body 5 is pressed into the interior of the mounting body 1. During this process, the snap-fit ​​block 6 is inserted into the interior of the limiting body 4. By manually pushing the pressing block 10 to retract into the interior of the limiting body 4, the snap hook 14 descends. At the same time, the first telescopic rod 8 and the first spring 13 are in a compressed state. After the ultrasonic meter body 5 is fully installed, the pressing block 10 is released, and the snap hook 14 resets and snaps into the interior of the snap-fit ​​block 6, thereby achieving the function of limiting the ultrasonic meter body 5. During the pressing of the ultrasonic meter body 5, the abutment block 21 is abutted by the ultrasonic meter body 5, thereby causing the abutment block 21 to retract into the interior of the ejector body 7. At the same time, after the support rod 20 rotates, the outer slider 17 slides outside the guide rod 16, and the reset spring 1 is set. When block 8 is in a compressed state, after the pressing block 10 is pressed, the hook 14 no longer limits the locking block 6, the return spring 18 resets, and the abutment block 21 pushes the ultrasonic meter body 5 out of the installation body 1, thus facilitating the removal of the ultrasonic meter body 5. During this process, the sliding plate 22 and the pressing rod 23 are pushed by force. During the installation of the ultrasonic meter body 5, the pressing rod 23 moves inside the installation body 1 and contacts the auxiliary slider 26. The auxiliary slider 26 drives the first toothed rod 27 to move. After the transmission gear set 28 rotates, it drives the transmission chain 29 and the meshing gear set 30 to rotate. At the same time, after the external gear 31 rotates, it drives the second toothed rod 33 and the abutment body 32 to move until the abutment rod 35 abuts against both sides of the ultrasonic meter body 5, reducing the impact of the ultrasonic meter body 5 inside the installation body 1.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow measurement device for a meter, comprising a mounting body (1) and a mounting plate (2), characterized in that, The mounting body (1) is externally connected to a fixing bolt (3) via an external thread of a mounting plate (2). The mounting body (1) is internally fixedly connected to a limiting body (4). The limiting body (4) is internally fixedly connected to a first telescopic rod (8). The top of the first telescopic rod (8) is fixedly connected to a pressing plate (9). The bottom of the pressing plate (9) is internally fixedly connected to a first spring (13) via the limiting body (4). The top of the pressing plate (9) is fixedly connected to a pressing block (10) through the limiting body (4). The pressing block (10) has insertion holes (11) on both sides. The pressing block (10) has a locking rod (12) inserted into it. The bottom of the pressing plate (9) is fixedly connected to a hook (14). The mounting body (1) is internally slidably connected to an ultrasonic meter body (5). The ultrasonic meter body (5) is fixedly connected to a snap block (6) on one side.

2. The flow measurement device for a meter according to claim 1, characterized in that, The installation body (1) is internally fixedly connected to a pop-out body (7). A sliding groove (15) is provided on one side of the pop-out body (7). A guide rod (16) is internally fixedly connected to the pop-out body (7). An outer slider (17) is slidably connected to the outside of the guide rod (16). A return spring (18) is fixedly connected to one side of the outer slider (17) through the inside of the pop-out body (7). A rotating block (19) is fixedly connected to the outside of the outer slider (17). A support rod (20) is rotatably connected to the outside of the rotating block (19).

3. The flow measurement device for a meter according to claim 2, characterized in that, One end of the support rod (20) is rotatably connected to an abutment block (21), the abutment block (21) is externally slidably connected to the inside of the pop-out body (7), a sliding plate (22) is fixedly connected to one side of the abutment block (21), and a pressing rod (23) is fixedly connected to one side of the sliding plate (22).

4. The flow measurement device for a meter according to claim 1, characterized in that, The installation body (1) is internally fixedly connected to a second telescopic rod (24), and an auxiliary slider (26) is fixedly connected to one end of the second telescopic rod (24).

5. The flow measurement device for a meter according to claim 4, characterized in that, One side of the auxiliary slider (26) is fixedly connected to a second spring (25) through the interior of the mounting body (1), and the other side of the auxiliary slider (26) is fixedly connected to a first toothed rod (27).

6. The flow measurement device for a meter according to claim 1, characterized in that, The mounting body (1) is rotatably connected to a transmission gear set (28), one side of the transmission gear set (28) meshes with one side of the first rack (27), and the mounting body (1) is rotatably connected to a meshing gear set (30).

7. The flow measurement device for a meter according to claim 6, characterized in that, The meshing gear set (30) is meshed with a transmission chain (29) through the external transmission gear set (28), and an external gear (31) is fixedly connected to the external of the meshing gear set (30).

8. The flow measurement device for a meter according to claim 1, characterized in that, The mounting body (1) has an internal sliding connection to an abutment body (32), and a second toothed rod (33) is fixedly connected to one side of the abutment body (32). One side of the second toothed rod (33) meshes with one side of an external gear (31).

9. The flow measurement device for a meter according to claim 8, characterized in that, A third telescopic rod (34) is fixedly connected inside the abutting body (32). One end of the third telescopic rod (34) is fixedly connected to an abutting rod (35). One side of the abutting rod (35) is fixedly connected to a third spring (36) through the interior of the abutting body (32).

10. A measurement method for a measuring instrument, characterized in that, A flow measurement device for a meter according to any one of claims 1-9, the method comprising the following steps: S1. Perform Discrete Fourier Transform on the I and Q paths of a frame of ADC sampling signal to obtain their respective phase values, converting the time-domain signal into frequency-domain information for easier subsequent analysis. S2. Subtract the phases of the I path and the Q path to obtain the original phase difference. This phase difference is closely related to the propagation state of sound waves in the fluid and is the basic data reflecting the change in flow velocity. S3. Based on the preset target value, the phase difference is initially screened to eliminate obviously abnormal data points. Then, the phase difference after the initial screening is further filtered to remove interference, improve the data purity, and significantly enhance the robustness of the system in noisy environments. S4. Using the phase difference after interference removal, combined with the ultrasonic propagation model, the flow velocity value of the current frame is deduced. Since there is a linear relationship between the phase difference and the Doppler frequency shift or time difference, the flow velocity can be accurately calculated through the calibration formula.

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