Mobile flow metrology standard device

Abstract

The application relates to a mobile flow metering standard device, which comprises a box body and a plurality of standard tables, a water tank is arranged in the box body, a pipeline system is connected to a water outlet of the water tank, water inlet ends and water outlet ends of adjacent standard tables are respectively connected to the pipeline system, a switching valve is arranged in the pipeline system corresponding to the water inlet ends of the adjacent standard tables, and the pipeline system is used for sending water in the water tank to a flow meter to be detected for metering detection. According to the embodiment provided by the application, the switching valve can be used to select the corresponding standard table by switching the conduction state between the adjacent standard tables and the pipeline system, or the plurality of standard tables can be combined for use, and the flow meter can be calibrated, so that the accuracy and stability of the flow metering standard device for calibrating the flow meter to be detected are effectively ensured, and the different calibration tables can be used for mutual verification, abnormal data can be found in time, and the reliability of the calibration work is improved.

Description

Technical Field

[0001] This application relates to the field of fluid measurement technology, and in particular to mobile flow metering standard devices. Background Technology

[0002] Liquid flow meters are widely used in industrial production, water conservancy and water management, energy metering and other fields. The accuracy of their measurement is crucial for the corresponding production, transportation and testing processes. To ensure the measurement accuracy of the flow meters, they need to be calibrated regularly.

[0003] In existing technologies, the flow meter is typically sent to a legally authorized testing institution or calibrated using a flow standard device.

[0004] However, for flow standard devices, since only one standard meter is generally used, if the standard meter drifts or is damaged during transportation, the reliability of the entire device cannot be guaranteed, and the calibration of the flow meter cannot be carried out. Utility Model Content

[0005] This application provides a mobile flow metering standard device to solve the problem in the prior art where the flow standard device only uses one standard meter, so when the standard meter malfunctions, the reliability of the entire device is affected, and the flow meter calibration work cannot be carried out normally.

[0006] This application provides a mobile flow metering standard device, including: a housing and a number of standard meters. The housing contains a water tank, and the outlet of the water tank is connected to a pipeline system. The inlet and outlet of adjacent standard meters are respectively connected to the pipeline system. The pipeline system is equipped with a switching valve corresponding to the inlet of adjacent standard meters. The switching valve switches the conduction state between adjacent standard meters and the pipeline system. The pipeline system is used to deliver water from the water tank to the flow meter under test for metering and testing.

[0007] Furthermore, the pipeline system is equipped with a pump body, which is connected to a water tank and a switching valve via pipelines.

[0008] Furthermore, the pipeline system is equipped with a compensation module, which is installed on the pipeline.

[0009] Furthermore, the compensation module includes a pressure transmitter and / or a temperature transmitter, which are respectively connected to the pipeline.

[0010] Furthermore, the pipeline system is equipped with a flow regulation module, which is connected to the pipeline.

[0011] Furthermore, the flow regulation module includes: a sight glass and a flow regulation valve, the flow regulation valve and the sight glass are connected by a pipeline, the flow regulation valve is connected to a water tank or pipeline system by a pipeline, and the sight glass is connected to the flow meter being tested by a pipeline.

[0012] Furthermore, the pump body is a variable frequency pump.

[0013] Furthermore, a flow totalizer is installed inside the housing, and the flow totalizer is electrically connected to a standard meter and the flow meter being tested.

[0014] Furthermore, an electric clamping device for fixing the flow meter being tested is provided on the outside of the housing, and the electric clamping device is located on the top or side of the housing.

[0015] Furthermore, the electric clamping device includes: a slide rail, a fixed front plate, a fixed rear plate, and an electric push rod. The slide rail is mounted on the housing, the fixed front plate is mounted on the end of the slide rail, a slider that moves along the slide rail is mounted on the slide rail, the fixed rear plate is mounted on the slider, the main body of the electric push rod is mounted on the fixed front plate, the output end of the electric push rod is connected to the fixed rear plate, and straight connecting pipes are respectively provided on the fixed front plate and the fixed rear plate. The area between the fixed front plate and the fixed rear plate is a placement position for placing the flow meter to be tested.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art:

[0017] According to the embodiments provided in this application, the conduction status between adjacent standard meters and the pipeline system can be switched by switching valves, thereby selecting the corresponding standard meter or combining multiple standard meters for flow meter calibration. This effectively ensures the accuracy and stability of the flow metering standard device in calibrating the flow meter under test. Furthermore, different calibration meters can be used to cross-verify each other, promptly detect abnormal data, and improve the reliability of the calibration work. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 A schematic diagram of the structure of the mobile flow metering standard device provided in the embodiments of this application.

[0022] Figure 2 This is a left view of an embodiment of this application.

[0023] Figure 3 This is the front view of the electric clamping device.

[0024] Figure 4 This is a top view of the electric clamping device.

[0025] Figure 5 This is a schematic diagram of the structure in which the electric clamping device is installed on the side of the box.

[0026] Figure 6 This is a schematic diagram of the structure of the electric clamping device housed in the water tank.

[0027] Figure 7 This is a schematic diagram of a mobile flow metering standard device that is connected to the target system via a flexible hose.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Housing; 11. Water tank; 12. Flow totalizer; 13. Casters; 2. Standard gauge; 21. First standard gauge; 22. Second standard gauge; 3. Piping system; 31. Switching valve; 32. Pump body; 33. Compensation module; 34. Flow regulation module; 341. Sight glass; 342. Flow regulation valve; 4. Electric clamping device; 41. Guide rail; 42. Slider; 43. Fixed front plate; 44. Fixed rear plate; 45. Electric push rod; 46. Connecting straight pipe; 5. Flow meter. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0032] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0033] To address the problem that existing flow measurement standard devices rely on only one standard meter, which can compromise the reliability of the entire device and hinder flow meter calibration when that standard meter malfunctions, this application provides a mobile flow measurement standard device. This device can switch the connection between adjacent standard meters and the pipeline system via a switching valve, thereby selecting the appropriate standard meter or combining multiple standard meters for flow meter calibration. This effectively ensures the accuracy and stability of the flow measurement standard device's calibration of the tested flow meter. Furthermore, it allows for cross-verification between different calibration meters, enabling timely detection of abnormal data and improving the reliability of the calibration process.

[0034] Please see Figure 1 , Figure 2The mobile flow metering standard device provided in this application embodiment includes: a housing 1 and standard meters 2, wherein the number of standard meters 2 is multiple. A water tank 11 is configured inside the housing 1, and the outlet of the water tank 11 is connected to a pipeline system 3. The inlet and outlet of adjacent standard meters 2 are respectively connected to the pipeline system 3. A switching valve 31 is provided in the pipeline system 3 corresponding to the inlet of adjacent standard meters 2. The switching valve 31 switches the conduction state between adjacent standard meters 2 and the pipeline system 3. The pipeline system 3 is used to send the water in the water tank 11 to the flow meter 5 under test for metering and testing.

[0035] During operation, the flow meter 5 under test is connected to the pipeline system 3 so that water loaded in the water tank 11 can be sent into the flow meter 5 for calibration. In the embodiment provided in this application, there are two sets of standard meters 2, and the on / off state of the pipelines connected to the two sets of standard meters 2 is switched by a switching valve 31. In this embodiment, the two sets of standard meters 2 are respectively labeled as the first standard meter 21 and the second standard meter 22. The switching valve 31 switches the state of the first standard meter 21 and the second standard meter 22 in four operating modes: closed mode, single calibration mode of the first standard meter 21, single calibration mode of the second standard meter 22, and combined calibration mode.

[0036] In the off mode, the pipes connected to the first standard meter 21 and the second standard meter 22 are cut off. At this time, the water in the water tank 11 is stopped outside the switching valve 31 and will not flow into the standard meter 2 and the flow meter 5.

[0037] In the single-machine calibration mode of the first standard meter 21, the switching valve 31 opens the pipeline connected to the first standard meter 21 and cuts off the pipeline connected to the second standard meter 22, thereby transporting the water in the water tank 11 to the pipeline connected to the first standard meter 21 through the pipeline system 3, and then flowing through the first standard meter 21 and the flow meter 5 under test in sequence, so as to calibrate the flow meter 5 through the first standard meter 21.

[0038] In the stand-alone calibration mode of the second standard meter 22, the switching valve 31 cuts off the pipeline connected to the first standard meter 21 and opens the pipeline connected to the second standard meter 22, thereby transporting the water in the water tank 11 to the pipeline connected to the second standard meter 22 through the pipeline system 3, and then flowing through the second standard meter 22 and the flow meter 5 under test in sequence, so as to calibrate the flow meter 5 through the second standard meter 22.

[0039] In the combined calibration mode, the switching valve 31 connects both the pipeline connected to the first standard meter 21 and the pipeline connected to the second standard meter 22. This allows water in the water tank 11 to be transported through the pipeline system 3 to the pipelines connected to the first standard meter 21 and the second standard meter 22, respectively, and then flow sequentially through the first standard meter 21 and the flow meter under test 5, or sequentially through the second standard meter 22 and the flow meter under test 5. In this mode, the series and parallel connections between the pipelines connected to the first standard meter 21 and the second standard meter 22 can be switched by switching the internal branches of the switching valve 31.

[0040] When the first standard meter 21 and the second standard meter 22 are connected in series in the pipeline system 3, water passes through the two standard meters 2 sequentially. Therefore, the flow rate at the first standard meter 21 and the second standard meter 22 is the same. Thus, when calibrating the flow meter 5, the difference between the reading of the flow meter 5 and the readings of each standard meter 2 can be observed to determine if there is a measurement deviation in the flow meter 5. If one of the standard meters 2 is drifted or damaged during transportation, the reading of that abnormal standard meter 2 will be deviated. Therefore, the presence of an abnormality in the standard meter 2 can be determined by observing the readings of the two standard meters 2. This series detection method reduces errors caused by flow rate fluctuations because the flow rate through each standard meter 2 is consistent, resulting in more accurate calibration results.

[0041] When the first standard meter 21 and the second standard meter 22 are connected in parallel to the pipeline system 3, the operation of different standard meters 2 can be controlled according to the valves on each branch, thereby achieving wide flow range calibration. This allows for the detection and evaluation of the metering performance of the flow meter 5 at different flow rates. Simultaneously, if any standard meter 2 malfunctions, abnormal data can be detected promptly, forming a mutual verification mechanism and improving the reliability of the calibration work.

[0042] In some optional embodiments, the piping system 3 is equipped with a pump body 32, which is connected to the water tank 11 and the switching valve 31 via a pipeline. The pump body 32 provides power for the flow of water in the water tank 11, pumping the water into the pipeline and transporting it forward along the pipeline, so that the water flows through the standard meter 2 and the flow meter 5, meeting the requirement of calibrating the flow meter 5 through the standard meter 2.

[0043] In some optional embodiments, the piping system 3 is equipped with a compensation module 33, which is disposed on the piping. The compensation module 33 includes a pressure transmitter and / or a temperature transmitter, which are respectively connected to the piping. The pressure transmitter is mainly used to measure the fluid pressure of the water in the piping, and the temperature transmitter is mainly used to measure the temperature of the water in the piping. Using the measured pressure and temperature data, the measured values ​​of the flow meter 5 can be compensated in real time through calculation, ensuring the accuracy of the measurement results. In environments with complex or highly variable fluid conditions, pressure and temperature compensation helps reduce measurement errors and improve calibration accuracy.

[0044] In some optional embodiments, the piping system 3 is equipped with a flow regulation module 34, which is connected to the piping. The flow regulation module 34 includes a sight glass 341 and a flow regulation valve 342. The flow regulation valve 342 is connected to the sight glass 341 via a piping connection. The flow regulation valve 342 is connected to the water tank 11 or the piping system 3 via a piping connection. The sight glass 341 is connected to the flow meter 5 being tested via a piping connection. The flow of water and other media inside the piping can be observed through the sight glass 341. The flow rate can be roughly determined from factors such as air bubbles and the stability of the fluid. The flow rate is then controlled by the flow regulation valve 342, thereby testing the flow meter 5 at different flow rates to determine if there are any abnormalities in its metering operation.

[0045] In some optional embodiments, the pump body 32 is a variable frequency pump. By using a variable frequency pump, when it is necessary to adjust the flow rate of water in the pipeline system 3, the output of the variable frequency pump can be adjusted to effectively control the flow rate, improve control accuracy, and meet the requirement of calibrating the metering effect of the flow meter 5 by different flow rates.

[0046] In some optional embodiments, a flow totalizer 12 is installed inside the housing 1, and the flow totalizer 12 is electrically connected to the standard meter 2 and the flow meter 5 under test. The flow totalizer 12 records the instantaneous flow rate passing through the standard meter 2 and the flow meter 5 under test continuously within the same time interval. After processing by the computer inside the flow totalizer 12, the deviation value of the cumulative amount within the calibration time is compared to calculate the corresponding error value.

[0047] Please see Figure 1 , Figure 3 as well as Figure 4 In some optional embodiments, an electric clamping device 4 for fixing the flow meter 5 under test is provided on the outside of the housing 1, and the electric clamping device 4 is provided on the top or side of the housing 1.

[0048] When calibrating the flow meter 5 under test using a flow metering standard device, different connection methods can be used depending on the type of flow meter 5. For details, please refer to [link / reference needed]. Figure 1 For the calibration of conventional flow meters 5 (such as mass flow meters 5, electromagnetic flow meters 5, vortex flow meters 5, ultrasonic flow meters 5, etc.), the electric clamping device 4 can be installed on the top of the housing 1; please refer to Figure 5 For the calibration of flow meters 5 with special installation requirements (such as float flow meters 5 and metal rotor flow meters 5), the electric clamping device 4 can be set on the side of the housing 1 to meet the working requirements of different types of flow meters 5, thereby obtaining the measurement status of the flow meter 5 under test for corresponding calibration work.

[0049] In some optional embodiments, the electric clamping device 4 includes: a slide rail, a fixed front plate 43, a fixed rear plate 44, and an electric push rod 45. The slide rail is disposed on the housing 1, the fixed front plate 43 is disposed at the end of the slide rail, a slider 42 that moves along the slide rail is mounted on the slide rail, the fixed rear plate 44 is disposed on the slider 42, the main body of the electric push rod 45 is disposed on the fixed front plate 43, the output end of the electric push rod 45 is connected to the fixed rear plate 44, and straight connecting pipes 46 are respectively disposed on the fixed front plate 43 and the fixed rear plate 44. The area between the fixed front plate 43 and the fixed rear plate 44 is a placement position for placing the flow meter 5 to be tested.

[0050] During operation, one end of the flow meter 5 under test is brought into contact with the fixed front plate 43, so that the connecting straight pipe 46 on the fixed front plate 43 is connected to the inlet end of the flow meter 5, and the other end of the flow meter 5 is placed towards the fixed rear plate 44. The electric push rod 45 is activated to drive the fixed rear plate 44 to move towards the flow meter 5, so that the connecting straight pipe 46 on the fixed rear plate 44 is connected to the outlet end of the flow meter 5. At the same time, the connecting straight pipe 46 of the fixed rear plate 44 is connected to the return end of the water tank 11, and the connecting straight pipe 46 of the fixed front plate 43 is connected to the pipeline system 3 connected to the outlet end of the standard meter 2, thus forming a fluid loop, which facilitates the calibration and measurement of the flow meter 5.

[0051] Please see Figure 6 In some embodiments, due to the use of a detachable electric clamping device 4, the setting position of the flow meter 5 can be adjusted according to different working requirements of the flow meter 5. At the same time, when transportation is required, the electric clamping device 4 can also be disassembled and stored in the water tank 11, thereby saving the overall volume, facilitating transportation and storage, and effectively avoiding damage to the electric clamping device 4 due to collisions during movement.

[0052] Please see Figure 7 In some testing operations, it is necessary to directly connect the outlet of pipeline system 3 to the target system. In this case, the electric clamping device 4 can be removed, and the outlet of pipeline system 3 can be connected to the docking pipe of the target system via a flexible hose. The flexible hose and the docking pipe can be connected using quick-connect fittings, threaded connections, or flange connections to ensure a conductive pipeline is formed between the flow metering standard device and the target system, thus ensuring the testing can proceed.

[0053] Please see Figure 1 , Figure 2 In order to improve the mobility of the flow metering standard device, in some embodiments, casters 13 are provided at the bottom of the housing 1 to facilitate the movement of the housing 1, thereby meeting the requirements of the flow meter 5 to be tested and calibrated in different scenarios.

[0054] According to the embodiments provided in this application, the conduction status between adjacent standard meters and the pipeline system can be switched by switching valves, thereby selecting the corresponding standard meter or combining multiple standard meters for flow meter calibration. This effectively ensures the accuracy and stability of the flow metering standard device in calibrating the flow meter under test. Furthermore, different calibration meters can be used to cross-verify each other, promptly detect abnormal data, and improve the reliability of the calibration work.

[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0061] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0062] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mobile flow metrology standard apparatus, characterized by, include: The system includes a housing and a number of standard meters. The housing contains a water tank, the outlet of which is connected to a piping system. The inlet and outlet of adjacent standard meters are connected to the piping system. Each piping system has a switching valve corresponding to the inlet of an adjacent standard meter. These switching valves switch the connection between adjacent standard meters and the piping system. The piping system is used to deliver water from the tank to the flow meter being tested for measurement.

2. The mobile flow metrology standard apparatus of claim 1, wherein, The pipeline system is equipped with a pump body, which is connected to a water tank and a switching valve via pipelines.

3. The mobile flow metering standard device according to claim 2, characterized in that, The pipeline system is equipped with a compensation module, which is installed on the pipeline.

4. The mobile flow metrology standard apparatus of claim 3, wherein, The compensation module includes a pressure transmitter and / or a temperature transmitter, which are respectively connected to the pipeline.

5. The mobile flow metering standard device according to claim 2, characterized in that, The pipeline system is equipped with a flow regulation module, which is connected to the pipeline.

6. The mobile flow metrology standard apparatus of claim 5, wherein, The flow regulation module includes a sight glass and a flow regulation valve. The flow regulation valve and the sight glass are connected by a pipeline. The flow regulation valve is connected to a water tank or pipeline system through a pipeline. The sight glass is connected to the flow meter being monitored through a pipeline.

7. The mobile flow metrology standard apparatus of claim 5 or 6, wherein, The pump body is a variable frequency pump.

8. The mobile flow metrology standard apparatus of claim 1, wherein, The housing contains a flow totalizer, which is electrically connected to a standard meter and the flow meter being tested.

9. The mobile flow metering standard device according to claim 1, characterized in that, The exterior of the housing is equipped with an electric clamping device for fixing the flow meter being tested, and the electric clamping device is located on the top or side of the housing.

10. The mobile flow metrology standard apparatus of claim 9, wherein, The electric clamping device includes: a slide rail, a fixed front plate, a fixed rear plate, and an electric push rod. The slide rail is mounted on the housing, the fixed front plate is mounted at the end of the slide rail, a slider that moves along the slide rail is mounted on the slide rail, the fixed rear plate is mounted on the slider, the main body of the electric push rod is mounted on the fixed front plate, and the output end of the electric push rod is connected to the fixed rear plate. The fixed front plate and the fixed rear plate are respectively provided with connecting straight pipes, and the area between the fixed front plate and the fixed rear plate is a placement position for placing the flow meter to be tested.

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