Instrument for measuring flow of fluid in pipeline

Abstract

The utility model relates to the field of measurement of fluid flow in a pipeline, in particular to an instrument for measuring the fluid flow in the pipeline. The liquid level sensor is arranged on the pipe wall of the pipeline and used for measuring liquid level data of fluid in the pipeline in real time; the energy converter is arranged on the pipe wall of the pipeline and used for measuring flow velocity data of fluid in the pipeline in real time; and the meter head is arranged on the outer wall of the pipeline, is electrically connected with the liquid level sensor and the transducer, and is used for calculating instantaneous flow data of the fluid in the pipeline based on the liquid level data of the fluid measured by the liquid level sensor and the flow velocity data of the fluid measured by the transducer. The actual instantaneous flow data of the fluid in the pipeline is calculated based on the actual liquid level data and the flow velocity data of the fluid, and compared with the traditional fluid flow calculated by default that the fluid in the pipeline is in a full pipe state, the accuracy and authenticity of the measured fluid flow are greatly improved; and the flow of the fluid in the pipeline can be reflected and represented more truly.

Description

Technical Field

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

[0002] Currently, conventional velocity flow meters or calorimeters on the market belong to full-pipe measurement. That is, when calculating the flow rate of the fluid in the pipeline, they usually do not judge whether the fluid in the pipeline is in a full-pipe state, but default that the fluid in the pipeline is in a full-pipe state. Thus, after measuring the fluid velocity in the pipeline, the flow rate of the fluid in the pipeline is calculated according to the state of the fluid being in a full-pipe. Since the pipeline generally has a complex layout in actual applications, and the installation conditions are variable, and at the same time, the pipeline in the system sometimes operates intermittently or there is gas in the pipeline, this will cause the fluid in the pipeline to be in a non-full-pipe state during the flow process. Using the traditional method of calculating the flow rate of the fluid in a full-pipe will result in a large measurement error in the calculated fluid flow rate.

[0003] To solve the problem of non-full-pipe phenomenon that is likely to occur in the pipeline, the conventional treatment method of people is to install an exhaust valve on the pipeline and exhaust the pipeline regularly or at a fixed pressure. In fact, whether it is regular exhaust or fixed-pressure exhaust, a certain amount of gas will accumulate in the pipeline before it is discharged, and it does not trigger the discharge of gas in real time. Therefore, the above method can only alleviate the problem of large measurement error for a while, and it cannot fundamentally solve the problem of non-full-pipe of the fluid in the pipeline. And during the long-term use of the exhaust valve, it is easy to have problems such as blockage and inability to open. Manual exhaust also faces many problems such as large workload, complex operation, and safety risks. Summary of the Invention

[0004] In order to improve the accuracy of measuring the flow rate of the fluid in the pipeline, this application provides an instrument for measuring the flow rate of the fluid in the pipeline. It measures the actual liquid level data of the fluid in the pipeline in real time through a liquid level sensor, and measures the actual flow velocity data of the fluid through a transducer. Then, the meter head calculates the actual instantaneous flow rate data of the fluid in the pipeline based on the actual liquid level data and flow velocity data of the fluid. Compared with the flow rate of the fluid calculated by defaulting that the fluid in the pipeline is in a full-pipe state in the traditional way, it greatly improves the accuracy and authenticity of the measured fluid flow rate, and can more truly reflect and represent the flow rate of the fluid in the pipeline.

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

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

[0007] A pipeline;

[0008] A liquid level sensor is provided on the pipe wall of a pipeline for real-time measurement of the liquid level of the fluid in the pipeline;

[0009] A transducer is provided on the pipe wall of the pipeline for real-time measurement of the flow rate of the fluid in the pipeline;

[0010] A meter head is provided on the outer wall of the pipeline and is electrically connected to both the liquid level sensor and the transducer, and is used for calculating the instantaneous flow rate data of the fluid in the pipeline based on the liquid level data of the fluid measured by the liquid level sensor and the flow rate data of the fluid measured by the transducer.

[0011] Preferably, the number of the liquid level sensors is multiple, and the multiple liquid level sensors are arranged along the circumferential direction of the pipeline.

[0012] Preferably, the multiple liquid level sensors are evenly distributed along the circumferential direction of the pipeline.

[0013] Preferably, a base is fixed on the outer wall of the pipeline, through holes communicating the inside and outside are formed in the pipe wall of the pipeline, the liquid level sensor is threadedly connected to the base, and the liquid level sensor penetrates through the through hole.

[0014] Preferably, an O-ring seal is provided between the liquid level sensor and the pipe wall of the pipeline, and the O-ring seal is located in the through hole.

[0015] Preferably, the meter head includes a housing provided on the outer wall of the pipeline, a calculation module provided inside the housing, and a display module provided on the surface of the housing, and the calculation module is electrically connected to the display module, the transducer, and the liquid level sensor.

[0016] In summary, the present application includes the following beneficial technical effects:

[0017] 1. The present application measures the actual liquid level data of the fluid in the pipeline in real time through the liquid level sensor, measures the actual flow rate data of the fluid by using the transducer, and then enables the meter head to calculate the actual instantaneous flow rate data of the fluid in the pipeline based on the actual liquid level data and flow rate data of the fluid. Compared with the fluid flow rate calculated by defaulting that the fluid in the pipeline is in a full pipe state in the traditional method, the accuracy and authenticity of the measured fluid flow rate are greatly improved, and the flow rate of the fluid in the pipeline can be more truly reflected and represented.

[0018] 2. By providing multiple liquid level sensors in the present application, when the instrument is installed at a certain inclination angle, there is still at least one liquid level sensor for measuring the liquid level of the fluid in the pipeline, so as to ensure the normal use of the instrument, reduce the installation requirements of the instrument, and improve the working efficiency of the staff for disassembly, installation and maintenance. Brief Description of the Drawings

[0019] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure 2 is Figure 1 a sectional view in the A-A direction in (only the pipeline is sectioned).

[0021] Figure 3 It is a partial explosion diagram at the liquid level sensor in an embodiment of the present application.

[0022] Explanation of reference numerals: 1, pipeline; 11, through hole; 2, liquid level sensor; 3, transducer; 4, meter head; 5, base; 6, O-ring seal. Detailed implementation manners

[0023] The following further elaborates on the present application in conjunction with the accompanying drawings.

[0024] An embodiment of the present application discloses an instrument for measuring the flow rate of fluid in a pipeline.

[0025] Referring to Figures 1 to 3 , this instrument includes a pipeline 1, a liquid level sensor 2, a transducer 3, and a meter head 4.

[0026] Both ends of the pipeline 1 are connected to other pipelines through flanges.

[0027] Referring to Figure 2 and Figure 3 , the liquid level sensor 2 is installed on the pipe wall of the pipeline 1, and the liquid level sensor 2 penetrates through the pipe wall of the pipeline 1. The liquid level sensor 2 is used to measure the actual liquid level data of the fluid in the pipeline 1 in real time. Specifically, a through hole 11 is opened on the pipe wall of the pipeline 1, and the liquid level sensor 2 is inserted into the through hole 11. And in order to fix the liquid level sensor 2 to the pipeline 1, a base 5 is welded and fixed on the outer wall of the pipeline 1. The base 5 is located on the outer wall of the pipeline 1 at the position of the through hole 11. The liquid level sensor 2 is fixed to the base 5 by threaded connection. At the same time, the liquid level sensor 2 passing through the through hole 11 can measure the liquid level of the fluid in the pipeline 1. In order to improve the sealing performance between the liquid level sensor 2 and the pipe wall of the pipeline 1, an O-ring seal 6 for sealing is provided between the liquid level sensor 2 and the pipe wall of the pipeline 1. The O-ring seal 6 seals between the liquid level sensor 2 and the pipe wall of the pipeline 1.

[0028] Specifically, referring to Figure 1 and Figure 3 , the number of the liquid level sensors 2 can be set to multiple. The multiple liquid level sensors 2 are evenly distributed on the pipe wall of the pipeline 1 along the circumferential direction of the pipeline 1. In this way, when the pipeline 1 is installed, even if there is a certain inclination angle, at least one of the multiple liquid level sensors 2 is located at the top of the pipeline 1, so that it can measure the liquid level of the fluid in the pipeline 1.

[0029] The transducer 3 is installed on the pipe wall of the pipe 1. The number of transducers 3 is two, and the two transducers 3 are symmetrically distributed on both sides of the radial direction of the pipe 1. The transducer 3 is used to measure the flow velocity data of the fluid in the pipe 1 in real time.

[0030] Referring to Figure 1 and Figure 3 , the meter head 4 is installed on the outer wall of the pipe 1. The meter head 4 includes a housing, a calculation module and a display module. The housing is installed on the outer wall of the pipe 1. The calculation module is arranged inside the housing. The display module can be arranged on the housing. The calculation module is electrically connected to the display module, the transducer 3 and the liquid level sensor 2. The calculation module is used to calculate the cross-sectional area data of the fluid in the pipe 1 based on the liquid level data of the fluid in the pipe 1 measured by the liquid level sensor 2, and then multiply the calculated cross-sectional area data of the fluid by the flow velocity data of the fluid measured by the transducer 3 to calculate the instantaneous flow rate data flowing through the pipe 1 per unit time. Among them, the display module can display the liquid level data of the fluid in the pipe 1 measured by the liquid level sensor 2 and the calculated instantaneous flow rate data of the fluid. The calculation module can select a single-chip microcomputer, and the display module can select a single-chip microcomputer display.

[0031] The instantaneous flow rate data of the fluid in the pipe 1 measured by using the above instrument is calculated based on the real-time liquid level of the fluid in the pipe 1. Compared with the fluid flow rate calculated by the traditional default that the fluid in the pipe 1 is in a full pipe state, the accuracy and authenticity of the measured fluid flow rate are greatly improved, and it can more truly reflect and represent the flow rate of the fluid in the pipe 1.

[0032] When the staff uses the instrument, a minimum threshold of the liquid level of the fluid in the pipe 1 can be preset on the calculation module, and an alarm function can be added, so that if the liquid level of the fluid in the pipe 1 measured by the liquid level sensor 2 is lower than the set minimum liquid level threshold, an alarm will be issued to prompt the maintenance personnel to make a timely response.

[0033] Referring to Figure 1 and Figure 3 , the above instrument also has a function of preliminarily diagnosing whether the transducer 3 is faulty. When the liquid level height of the fluid in the pipe 1 is lower than the transducer 3, the transducer 3 will also issue an alarm. Therefore, during the use of the instrument, if the transducer 3 issues a fault alarm, the staff cannot initially judge whether the transducer 3 issues the alarm due to its own fault or because the liquid level in the pipe 1 does not cover the transducer 3. However, through the above instrument, the staff can make a preliminary judgment on whether the transducer 3 is faulty by observing the liquid level of the fluid in the pipe 1, so as to facilitate the maintenance personnel to quickly find out the location of the fault;

[0034] Specifically, when the transducer 3 issues a fault alarm, if the liquid level of the fluid in the pipeline 1 measured by the liquid level sensor 2 is higher than the height of the transducer 3, it is preliminarily determined that the transducer 3 itself has a fault;

[0035] If the liquid level of the fluid in the pipeline 1 measured by the liquid level sensor 2 is lower than the height of the transducer 3, it is preliminarily determined that the alarm of the transducer 3 is caused by the too low liquid level of the fluid in the pipeline 1, and the liquid level of the fluid can be increased by exhausting gas or increasing the flow rate or pressure of the fluid.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An instrument for measuring the fluid flow rate in a pipeline, characterized in that, Comprising: A pipeline; A liquid level sensor, disposed on the pipe wall of the pipeline, for real-time measurement of the liquid level data of the fluid in the pipeline; A transducer, disposed on the pipe wall of the pipeline, for real-time measurement of the flow velocity data of the fluid in the pipeline; A meter head, disposed on the outer wall of the pipeline, electrically connected to both the liquid level sensor and the transducer, for calculating the instantaneous flow rate data of the fluid in the pipeline based on the liquid level data of the fluid measured by the liquid level sensor and the flow velocity data of the fluid measured by the transducer.

2. The instrument for measuring the fluid flow rate in a pipeline according to claim 1, characterized in that, The number of the liquid level sensors is multiple, and the multiple liquid level sensors are arranged along the circumferential direction of the pipeline.

3. An instrument for measuring the fluid flow rate in a pipeline according to claim 2, characterized in that, The multiple liquid level sensors are evenly distributed along the circumferential direction of the pipeline.

4. An instrument for measuring the flow rate of fluid in a pipeline according to claim 1, characterized in that, A base is fixed on the outer wall of the pipeline, through holes communicating the inside and outside are formed in the pipe wall of the pipeline, the liquid level sensor is threadedly connected to the base, and the liquid level sensor passes through the through hole.

5. An instrument for measuring the fluid flow rate in a pipeline according to claim 4, characterized in that, An O-ring seal is provided between the liquid level sensor and the pipe wall of the pipeline, and the O-ring seal is located in the through hole.

6. The instrument for measuring the fluid flow rate in a pipeline according to claim 1, wherein The meter head includes a housing disposed on the outer wall of the pipeline, a calculation module disposed inside the housing, and a display module disposed on the surface of the housing. The calculation module is electrically connected to the display module, the transducer, and the liquid level sensor.

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