Instrument for measuring flow of fluid in pipeline

Abstract

The utility model relates to an instrument for measuring the flow of fluid in a pipeline. The vortex generating body is arranged in the pipeline and is used for generating vortexes; the transducer is arranged on the pipeline and is used for measuring flow velocity data; the front liquid level sensor is arranged at the front end of the vortex generating body; the rear liquid level sensor is arranged at the rear end of the vortex generating body; and the meter head is arranged at the top of the pipeline and is used for calculating the flow of the fluid in the pipeline based on the flow velocity data and the preposed liquid level data. According to the method, the flow of the fluid in the pipeline is calculated on the basis of the preposed liquid level data and the flow velocity data which are measured in real time, and compared with the traditional fluid flow which is calculated by directly defaulting that the fluid in the pipeline is in a full-pipe state, the accuracy of the measured fluid flow is greatly improved; and by comparing the fluid liquid level measured by the rear liquid level sensor and the fluid liquid level measured by the front liquid level sensor, a worker can make a preliminary judgment on the fault problem when the transducer gives an alarm, so that the fault can be found out more quickly, and the maintenance speed and efficiency of the worker are improved.

Description

Technical Field

[0001] This application relates to an instrument for measuring the flow rate of fluid in a pipeline, and particularly to an instrument for measuring the flow rate of fluid in a pipeline. Background Art

[0002] Currently, conventional vortex flow meters or heat meters on the market all belong to the full-pipe measurement principle. The core lies in the assumption that the fluid always maintains a full-pipe state in the pipeline, and thus the flow rate is directly converted based on the measured flow velocity. This premise sometimes does not hold in a complex and changeable pipeline system, especially in scenarios involving intermittent motion, complex pipeline layouts, and limited installation conditions, where the fluid in the pipeline may not be full, resulting in measurement errors.

[0003] To address this problem, the industry generally adopts the method of installing exhaust valves and attempts to maintain the full-pipe state of the fluid in the pipeline by exhausting gas regularly or at a constant pressure. However, these methods are essentially passive management and have a lag in response, unable to respond in real time to the rapid changes in the fluid state. In addition, the long-term operation of automatic exhaust valves may encounter problems such as blockage failures, affecting the exhaust effect. Manual intervention is not only inefficient and cumbersome but also accompanied by operation safety risks. This makes the measured flow rate still have a large error when the pipeline of the vortex flow meter or heat meter is not full. Summary of the Invention

[0004] In order to improve the accuracy of the instrument for measuring the flow rate of fluid, this application provides an instrument for measuring the flow rate of fluid in a pipeline. It calculates the flow rate of the fluid in the pipeline based on the actual pre-fluid level data measured in real time by a pre-fluid level sensor and the flow velocity data measured in real time by a transducer. Compared with the flow rate of the fluid calculated by directly defaulting that the fluid in the pipeline is in a full-pipe state in the traditional way, it greatly reduces the flow rate error of the fluid measured by this instrument and improves the accuracy of the measured flow rate of the fluid.

[0005] An instrument for measuring the flow rate of fluid in a pipeline provided by this application adopts the following technical solutions:

[0006] An instrument for measuring the flow rate of fluid in a pipeline includes:

[0007] A pipeline;

[0008] A vortex generator, which is arranged inside the pipeline along the radial direction of the pipeline and is fixed to the inner wall of the pipeline at both ends for generating vortices;

[0009] A transducer, which is arranged on the side wall of the pipeline for measuring the flow velocity data of the fluid in real time;

[0010] A pre-fluid level sensor, which is arranged at the front end where the vortex generator contacts the fluid for measuring the pre-fluid level data of the fluid in real time;

[0011] The header is provided at the top of the pipeline and is electrically connected to both the transducer and the pre-level sensor, and is used to calculate the flow rate of the fluid in the pipeline based on the flow rate data of the fluid measured by the transducer and the pre-level data of the fluid measured by the pre-level sensor.

[0012] Preferably, a pre-installation groove is formed on the vortex generator body, and the pre-level sensor is disposed through the pre-installation groove.

[0013] Preferably, a pre-sleeve is sleeved outside the pre-level sensor, the pre-sleeve is disposed through the pre-installation groove, and pre-permeable holes are formed on the tube wall of the pre-sleeve.

[0014] Preferably, a pre-O-ring seal is provided between the pre-sleeve and the pipeline.

[0015] Preferably, a post-level sensor for measuring the fluid level is further provided on the rear end of the vortex generator body in contact with the fluid, and the post-level sensor is parallel to the pre-level sensor.

[0016] Preferably, a post-installation groove is formed on the vortex generator body, and the post-level sensor is disposed through the post-installation groove.

[0017] Preferably, a post-sleeve is sleeved outside the post-level sensor, the post-sleeve is disposed through the post-installation groove, and post-permeable holes are formed on the post-sleeve.

[0018] Preferably, a post-O-ring seal is provided between the post-sleeve and the pipeline.

[0019] In summary, the present application includes the following beneficial technical effects:

[0020] 1. The present application calculates the flow rate of the fluid in the pipeline based on the actual pre-level data of the fluid measured by the pre-level sensor in real time and the flow rate data measured by the transducer in real time. Compared with the flow rate of the fluid calculated by directly defaulting that the fluid in the pipeline is in a full-pipe state in the traditional method, the flow rate error of the fluid measured by this instrument is greatly reduced, and the accuracy of the flow rate of the fluid measured is improved.

[0021] 2. The present application reduces the impact of the fluid on the pre-level sensor by sleeving a pre-sleeve outside the pre-level sensor, reduces the damage to the pre-level sensor, and extends the service life of the pre-level sensor.

[0022] 3. By providing the post-level sensor in the present application, the staff can initially judge the fault problem when the transducer alarms, so as to find the fault faster, and improve the maintenance speed and efficiency of the staff.

[0023] 4. In the present application, a rear sleeve is sleeved outside the rear liquid level sensor, thereby reducing the impact of the fluid on the rear liquid level sensor, reducing the damage to the rear liquid level sensor, and prolonging the service life of the rear liquid level sensor. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 is a schematic sectional structure diagram in an embodiment of the present application (wherein the pipeline, the vortex generator, the front sleeve and the rear sleeve are sectioned).

[0026] Figure 3 is an exploded view of an embodiment of the present application (wherein the pipeline is sectioned).

[0027] Figure 4 is a schematic diagram of the internal structure of the pipeline in an embodiment of the present application (wherein the pipeline is hidden and the front end of the vortex generator is the main view angle).

[0028] Figure 5 is a schematic diagram of the internal structure of the pipeline in an embodiment of the present application (wherein the pipeline is hidden and the rear end of the vortex generator is the main view angle).

[0029] Description of the reference numerals: 11, pipeline; 12, vortex generator; 121, front mounting groove; 122, rear mounting groove; 13, transducer; 14, front liquid level sensor; 15, meter head; 16, front sleeve; 161, front water permeable hole; 17, front O-ring; 21, rear liquid level sensor; 22, rear sleeve; 221, rear water permeable hole; 23, rear O-ring. Detailed Description of the Embodiment

[0030] The following further describes the present application in detail with reference to the drawings.

[0031] An embodiment of the present application discloses an instrument for measuring the flow rate of fluid in a pipeline.

[0032] Referring to Figures 1 to 3 , the instrument includes a pipeline 11, a vortex generator 12, a transducer 13, a front liquid level sensor 14, and a meter head 15.

[0033] Referring to Figure 1 , both ends of the pipeline 11 are connected to other pipelines through flange connections.

[0034] Referring to Figure 2 and Figure 3, the vortex generator 12 is of a quadrangular prism type, and the vortex generator 12 is arranged at the exact middle position of the pipeline 11 in the radial direction of the pipeline 11. The upper and lower ends of the vortex generator 12 are fixedly connected to the inner wall of the pipeline 11. And during use, the larger surface of the two side surfaces of the vortex generator 12 in the axial direction of the pipeline 11 is the front end in contact with the fluid, and the smaller surface is the rear end in contact with the fluid, so that vortices can be generated when the fluid passes through the vortex generator 12.

[0035] Refer to Figure 3 , the transducer 13 is installed and fixed on the side wall of the pipeline 11, and the transducer 13 is used to measure the flow velocity data of the fluid in the pipeline 11 in real time.

[0036] Refer to Figure 3 and Figure 4 , the front liquid level sensor 14 is installed at the front end of the vortex generator 12 in contact with the fluid. The front liquid level sensor 14 is used to measure the front liquid level data of the fluid in the pipeline 11 in real time. A front installation groove 121 is provided along the length direction on the vortex generator 12, and the front liquid level sensor 14 is inserted into the front installation groove 121. And in order to reduce the impact of the fluid on the front liquid level sensor 14 to protect the front liquid level sensor 14 and extend the service life of the front liquid level sensor 14, a front sleeve 16 is sleeved outside the front liquid level sensor 14. The front sleeve 16 is inserted into the front installation groove 121. The outside of the front sleeve 16 is cylindrical, and the front installation groove 121 is a cylindrical groove for cooperating with the front sleeve 16. The cross section of the front installation groove 121 is more than half a circle. At the same time, in order to ensure that the front liquid level sensor 14 can measure the liquid level of the fluid, a plurality of front water-permeable holes 161 are provided at equal intervals from top to bottom on the pipe wall of the front sleeve 16, so that the fluid can enter the front sleeve 16. In order to better seal the front sleeve 16 and the pipeline 11, a front O-ring 17 is provided between the front sleeve 16 and the pipeline 11, and the front liquid level sensor 14 is hermetically connected to the pipeline 11 through a high-pressure sealing joint.

[0037] Refer to Figure 3 , the meter head 15 is installed on the outer wall of the pipeline 11, and the meter head 15 is electrically connected to both the transducer 13 and the front liquid level sensor 14. Specifically, the meter head 15 includes a housing, a calculation module installed inside the housing, and a display module for displaying the liquid level and the fluid flow rate. The calculation module is electrically connected to the transducer 13 and the front liquid level sensor 14. The calculation module can select a single-chip microcomputer, and the display module can select a single-chip microcomputer display.

[0038] During use, the transducer 13 uploads the data it measures to the calculation module. At the same time, the front liquid level sensor 14 also uploads the front liquid level data of the fluid it measures to the calculation module. The calculation module calculates the cross-sectional area data of the fluid based on the front liquid level data of the fluid uploaded by the front liquid level sensor 14, and then calculates the instantaneous flow rate data of the fluid in the pipeline 11 based on the cross-sectional area data and the flow rate data measured and uploaded by the transducer 13. The instantaneous flow rate data of the fluid calculated by this instrument is closer to the true instantaneous flow rate of the fluid in the pipeline 11. Compared with the flow rate of the fluid calculated directly based on the full pipe state of the pipeline 11 in the traditional method, it greatly improves the accuracy of the measured fluid flow rate in the pipeline 11, effectively reduces the error of the measured fluid flow rate, and at the same time, compared with the traditional process of exhausting the pipeline 11, this instrument also greatly simplifies the measurement process and measurement efficiency of the fluid flow rate in the pipeline 11.

[0039] For the above-mentioned instrument, during its use, if the liquid level in the pipeline 11 does not submerge the transducer 13, the transducer 13 will issue a fault alarm. At this time, the staff cannot initially determine whether the transducer 13 issues the alarm due to its own fault or because the liquid level in the pipeline 11 does not submerge the transducer 13. Therefore, this also makes the maintenance work of the instrument complex and changeable, and at the same time, the maintenance cost is relatively high, reducing the overall reliability and maintenance efficiency of the system.

[0040] In order to be able to make a preliminary judgment on whether the transducer 13 is faulty, a rear liquid level sensor 21 is also provided on the vortex generator 12. The rear liquid level sensor 21 is used to measure the rear liquid level data of the fluid in the pipeline 11 in real time, and the rear liquid level sensor 21 is electrically connected to the calculation module of the meter head 15.

[0041] Refer to Figure 3 and Figure 5 Specifically, a rear mounting groove 122 is formed along the length direction on the upper edge of the rear end of the vortex generator 12 in contact with the fluid, and the rear liquid level sensor 21 is inserted into the rear mounting groove 122. And in order to reduce the impact of the fluid on the rear liquid level sensor 21 to protect the rear liquid level sensor 21 and extend its service life, a rear sleeve 22 is sleeved outside the rear liquid level sensor 21. The rear sleeve 22 is inserted into the rear mounting groove 122. The outside of the rear sleeve 22 is cylindrical, and the rear mounting groove 122 is a cylindrical groove for cooperating with the rear sleeve 22. The cross-section of the rear mounting groove 122 is more than a semi-circle. In order to better seal the rear sleeve 22 and the pipeline 11, a rear O-ring 23 is provided between the rear sleeve 22 and the pipeline 11, and the rear liquid level sensor 21 is hermetically connected to the pipeline 11 through a high-pressure sealing joint.

[0042] Meanwhile, to ensure that the post-position liquid level sensor 21 can measure the liquid level of the fluid, a plurality of post-position water-permeable holes 221 are equidistantly arranged from top to bottom on the pipe wall of the post-position sleeve 22, so that the fluid can enter the post-position sleeve 22.

[0043] During use, the user can preset the thresholds of the front-position liquid level sensor 14 and the post-position liquid level sensor 21. When the liquid levels of the fluid measured by the front-position liquid level sensor 14 and the post-position liquid level sensor 21 are lower than the preset thresholds, the display module of the meter head 15 will display and give an alarm for insufficient liquid level.

[0044] During the use process, the front-position liquid level sensor 14 and the post-position liquid level sensor 21 will measure the liquid level height of the fluid in the pipeline 11 in real time. If the transducer 13 gives a fault alarm, at this time, the user can check the liquid levels of the fluid measured by the front-position liquid level sensor 14 and the post-position liquid level sensor 21 on the meter head 15;

[0045] If both the front-position liquid level data of the fluid measured by the front-position liquid level sensor 14 and the post-position liquid level data of the fluid measured by the post-position liquid level sensor 21 are lower than the height of the transducer 13, it is initially judged that the liquid level of the fluid in the pipeline 11 is too low, and the liquid level height of the fluid in the pipeline 11 needs to be increased;

[0046] If the front-position liquid level data of the fluid measured by the front-position liquid level sensor 14 is higher than the height of the transducer 13, and the post-position liquid level data of the fluid measured by the post-position liquid level sensor 21 is lower than the installation height of the transducer 13, it is initially judged that the flow rate of the fluid in the pipeline 11 is too fast, and cavitation occurs at the rear end of the vortex generator 12, and the flow rate of the fluid in the pipeline 11 needs to be reduced;

[0047] If both the front-position liquid level data of the fluid measured by the front-position liquid level sensor 14 and the post-position liquid level data of the fluid measured by the post-position liquid level sensor 21 are higher than the height of the transducer 13 and the data is relatively stable, it is initially judged that the transducer 13 has a fault, and the transducer 13 can be replaced.

[0048] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An instrument for measuring the flow rate of a fluid in a pipeline, characterized in that: include: pipeline; The vortex generator is arranged inside the pipeline along the radial direction of the pipeline, and its two ends are respectively fixed to the inner wall of the pipeline to generate a vortex; The transducer is arranged on the side wall of the pipeline and is used to measure the flow velocity data of the fluid in real time; The front liquid level sensor is arranged at the front end where the vortex generating body contacts the fluid, and is used to measure the front liquid level data of the fluid in real time; The meter head is arranged at the top of the pipeline and is electrically connected to the transducer and the front liquid level sensor, and is used to calculate the flow rate of the fluid in the pipeline based on the flow velocity data of the fluid measured by the transducer and the front liquid level data of the fluid measured by the front liquid level sensor.

2. The instrument for measuring the flow rate of fluid in a pipeline according to claim 1, characterized in that: A front installation groove is provided on the vortex generating body, and the front liquid level sensor is inserted into the front installation groove.

3. The instrument for measuring the flow rate of fluid in a pipeline according to claim 2, characterized in that: The front liquid level sensor is externally sleeved with a front sleeve, the front sleeve is inserted into the front installation groove, and a front water permeable hole is opened on the tube wall of the front sleeve.

4. The instrument for measuring the flow rate of fluid in a pipeline according to claim 3, characterized in that: A front O-type sealing ring is arranged between the front sleeve and the pipeline.

5. The instrument for measuring the flow rate of fluid in a pipeline according to claim 1, characterized in that: A rear liquid level sensor for measuring the liquid level of the fluid is also provided on the rear end of the vortex generating body in contact with the fluid, and the rear liquid level sensor is parallel to the front liquid level sensor.

6. The instrument for measuring the flow rate of fluid in a pipeline according to claim 5, characterized in that: A rear installation groove is provided on the vortex generating body, and the rear liquid level sensor is inserted into the rear installation groove.

7. The instrument for measuring the flow rate of fluid in a pipeline according to claim 6, characterized in that: The rear liquid level sensor is externally sleeved with a rear sleeve, the rear sleeve is inserted into the rear installation groove, and a rear water permeable hole is opened on the rear sleeve.

8. The instrument for measuring the flow rate of fluid in a pipeline according to claim 7, characterized in that: A rear O-type sealing ring is arranged between the rear sleeve and the pipeline.

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