Flowmeter calibration device with reusable function

Abstract

This utility model relates to a flow meter calibration device with reusable functionality, belonging to the technical field of flow meter testing equipment. It includes a water storage tank and a metering tank. The water storage tank is connected to workshop production water, and an inlet pipe connects the workshop production water to the water storage tank. A pipeline centrifugal pump is installed between the water storage tank and the metering tank. A pumping pipe connects the pipeline centrifugal pump to the lower part of the water storage tank, and a calibration delivery pipe connects the pipeline centrifugal pump to the upper end of the metering tank. The calibration delivery pipe is equipped with a calibration table and a standard table. It features water conservation and environmental protection, high accuracy, high automation, compact structure, and good operational stability. By using a relatively fixed calibration device, the flow meter calibration process is simplified, achieving more accurate calibration results.

Description

Technical Field

[0001] This utility model relates to the technical field of flow meter testing equipment, and specifically to a flow meter calibration device with reusable function. Background Technology

[0002] Flow rate is one of the four most important parameters (temperature, pressure, liquid level, and flow rate) in industrial production processes. In industries such as chemical, petroleum, metallurgy, power, pharmaceutical, and food and beverage, accurate flow rate measurement is directly related to:

[0003] Production cost control: precise proportioning of raw materials to avoid waste.

[0004] Product quality assurance: Ensure stable process parameters and qualified products.

[0005] Energy management and trade settlement: such as the measurement of water, steam, and natural gas, involves huge economic interests.

[0006] Safety and Environmental Protection: Monitor the flow rate of harmful or flammable and explosive media to prevent leaks and accidents.

[0007] As a precision instrument, the flow meter's measurement accuracy decreases over time; this phenomenon is called "drift." Reasons include:

[0008] Mechanical wear: such as bearing wear in turbine flow meters.

[0009] Component aging: such as scale buildup on the electrodes of an electromagnetic flowmeter and coil aging.

[0010] Media influence: Damage to measuring elements caused by impurities and corrosive substances in the fluid.

[0011] Physical shock: Vibration during installation or transportation can cause internal components to shift.

[0012] Various flow meters in production facilities are widely used to measure the volume and mass of various fluids. However, factories generally do not have calibration devices for this purpose, and it is time-consuming and laborious to take them outside for calibration. Summary of the Invention

[0013] This invention addresses the shortcomings of existing technologies by providing a flow meter calibration device with reusable functionality. It features water conservation, environmental friendliness, high accuracy, high automation, compact structure, and good operational stability. By using a relatively fixed calibration device, the flow meter calibration process is simplified, achieving more accurate calibration results.

[0014] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0015] A flow meter calibration device with reusable function includes a water storage tank and a metering tank. The water storage tank is connected to workshop production water. An inlet pipe is provided between the workshop production water and the water storage tank. A pipeline centrifugal pump is provided between the water storage tank and the metering tank. A pumping pipe is provided between the pipeline centrifugal pump and the lower part of the water storage tank. A calibration delivery pipe is provided between the pipeline centrifugal pump and the upper end of the metering tank. A calibration table and a standard table are provided on the calibration delivery pipe.

[0016] Preferably, a flexible hose is provided between the water pumping pipe and the lower part of the metering tank, and bottom valves are provided at both ends of the flexible hose and between the water pumping pipe and the lower part of the water storage tank.

[0017] Preferably, a pressure gauge connected to the calibration delivery pipe is installed between the standard gauge and the pipeline centrifugal pump. A return water pipe is installed between the calibration delivery pipe and the upper end of the water storage tank.

[0018] Preferably, hydraulic control valves are installed on the inlet pipe, between the pressure gauge and the standard gauge, and on the return pipe.

[0019] Preferably, the measuring barrel is equipped with a weighbridge at its lower end.

[0020] This invention can achieve the following effects:

[0021] This invention provides a flow meter calibration device with reusable functionality. Compared with existing technologies, it features water conservation and environmental friendliness, high accuracy, high automation, compact structure, and good operational stability. By using a relatively fixed calibration device, the flow meter calibration process is simplified, achieving more accurate calibration results.

[0022] Water conservation and environmental protection: Water recycling reduces water consumption.

[0023] High accuracy: The system employs both standard table comparison and weighbridge weighing to ensure calibration accuracy.

[0024] High degree of automation: Automatic control is achieved through hydraulic valves, which are easy to operate and highly efficient.

[0025] Compact structure: The components are highly integrated, making it suitable for use in the workshop.

[0026] Stable operation: The foot valve design ensures reliable pump startup. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] In the diagram: 1. Water storage tank; 2. Inlet pipe; 3. Workshop production water; 4. Metering tank; 5. Calibration and delivery pipe; 6. Verification gauge; 7. Weighbridge; 8. Standard gauge; 9. Hydraulic control valve; 10. Pressure gauge; 11. Pipeline centrifugal pump; 12. Hose; 13. Pumping pipe; 14. Return pipe; 15. Bottom valve. Detailed Implementation

[0029] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0030] Example: Figure 1 As shown, a flow meter calibration device with reusable function includes a water storage tank 1 and a metering tank 4. A weighbridge 7 is installed at the lower end of the metering tank 4. The water storage tank 1 is connected to workshop production water 3. An inlet pipe 2 is connected between the workshop production water 3 and the water storage tank 1. A pipeline centrifugal pump 11 is installed between the water storage tank 1 and the metering tank 4. A suction pipe 13 is installed between the pipeline centrifugal pump 11 and the lower part of the water storage tank 1. A flexible hose 12 is installed between the suction pipe 13 and the lower part of the metering tank 4. Foot valves 15 are installed at both ends of the flexible hose 12 and between the suction pipe 13 and the lower part of the water storage tank 1. A calibration delivery pipe 5 is installed between the pipeline centrifugal pump 11 and the upper end of the metering tank 4. A calibration gauge 6 and a standard gauge 8 are installed on the calibration delivery pipe 5. A pressure gauge 10, connected to the calibration delivery pipe 5, is installed between the standard gauge 8 and the pipeline centrifugal pump 11. A return pipe 14 is installed between the calibration delivery pipe 5 and the upper end of the water storage tank 1. A hydraulic control valve 9 is installed on the inlet pipe 2, between the pressure gauge 10 and the standard gauge 8, and on the return pipe 14.

[0031] Workflow:

[0032] I. Preparation Stage:

[0033] The water storage tank 1 is automatically replenished with the workshop production water 3 through the hydraulic control valve 9 on the water inlet pipe 2.

[0034] The system starts up, and the pipeline centrifugal pump 11 begins operation.

[0035] II. Circulation / Preheating Stage:

[0036] Close the valve leading to metering tank 4 and open the hydraulic control valve 9 on return water pipe 14.

[0037] Water circulates between storage tank 1, pipeline centrifugal pump 11, calibration delivery pipe 5, return water pipe 14, and storage tank 1, purging gas from the pipeline and stabilizing the system.

[0038] III. Verification Phase:

[0039] Close the hydraulic control valve 9 on the return water pipe 14 and open the hydraulic control valve 9 on the calibration main pipe.

[0040] Water flows steadily into metering tank 4 after passing through pressure gauge 10, standard gauge 8, and calibration gauge 6.

[0041] Record the readings of standard table 8 and verification table 6, and simultaneously record the changes in the reading of weighbridge 7.

[0042] Once the preset water volume or time is reached, close the hydraulic control valve 9 on the main pipeline to stop the calibration.

[0043] IV. Reuse Stage:

[0044] Through the hose 12 and the pumping pipe 13, the pipeline centrifugal pump 11 pumps the calibrated water in the metering tank 4 back to the storage tank 1, or directly uses it for the next calibration cycle, thus realizing the closed-loop reuse of water resources.

[0045] The following are the procedures for verifying the accuracy of checklist 6:

[0046] (1) The accuracy of the calibrated instrument is determined by whether the real-time display values ​​of the standard instrument 8 and the calibration instrument 6 are consistent. First, start the pipeline centrifugal pump 11. The fluid enters the metering tank 4 through the standard instrument 8 and the calibration instrument 6. At this time, observe whether the instantaneous flow rates of the standard instrument 8 and the calibration instrument 6 are consistent. If they are consistent, the calibration instrument 6 is accurate. If they are inconsistent, it does not indicate a problem. Correction is made by making the corresponding adjustments.

[0047] (2) After running the pipeline centrifugal pump 11 for a period of time, the accuracy of calibration table 6 is comprehensively judged by the cumulative values ​​of standard table 8, calibration table 6, and weighbridge 7. This helps to eliminate the influence of the temporary instability of instantaneous flow on flow measurement. First, record the original cumulative values ​​of standard table 8, calibration table 6, and weighbridge 7. Then, start the pump, adjust the flow rate and back pressure, and run it for a certain period of time to reach a certain amount, depending on the size of the flow meter and the size of the measuring tank 4. After the pipeline centrifugal pump 11 stops, record the final values ​​of standard table 8, calibration table 6, and weighbridge 7. The accuracy of the calibrated table is comprehensively judged by the data obtained by subtracting the original value from the final value. Of course, the instantaneous values ​​of standard table 8 and calibration table 6 can also be observed for reference during this process.

[0048] Regardless of the method used, once the metering tank is full, the hose 12 of the metering tank 4 can be connected to the inlet pipe of the pipeline centrifugal pump 11 and pumped back to the water storage tank 1 to achieve the purpose of water reuse and conservation, which is convenient and quick.

[0049] In summary, this reusable flowmeter calibration device features water conservation and environmental friendliness, high accuracy, high automation, compact structure, and good operational stability. By using a relatively fixed calibration device, the flowmeter calibration process is simplified, achieving more accurate calibration results.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A flow meter calibration device with reusable function, characterized in that: It includes a water storage tank (1) and a metering tank (4). The water storage tank (1) is connected to workshop production water (3). A water inlet pipe (2) is provided between the workshop production water (3) and the water storage tank (1). A pipeline centrifugal pump (11) is provided between the water storage tank (1) and the metering tank (4). A water pumping pipe (13) is provided between the pipeline centrifugal pump (11) and the lower part of the water storage tank (1). A calibration conveying pipe (5) is provided between the pipeline centrifugal pump (11) and the upper end of the metering tank (4). A calibration table (6) and a standard table (8) are provided on the calibration conveying pipe (5).

2. The flow meter calibration device with reusable function according to claim 1, characterized in that: A flexible hose (12) is provided between the pumping pipe (13) and the lower part of the metering tank (4). Bottom valves (15) are provided at both ends of the flexible hose (12) and between the pumping pipe (13) and the lower part of the water storage tank (1).

3. The flow meter calibration device with reusable function according to claim 1, characterized in that: A pressure gauge (10) connected to the calibration delivery pipe (5) is provided between the standard table (8) and the pipeline centrifugal pump (11); a return water pipe (14) is provided between the calibration delivery pipe (5) and the upper end of the water storage tank (1).

4. The flow meter calibration device with reusable function according to claim 3, characterized in that: A hydraulic control valve (9) is provided on the inlet pipe (2), between the pressure gauge (10) and the standard gauge (8), and on the return pipe (14).

5. The flow meter calibration device with reusable function according to claim 1, characterized in that: The weighing barrel (4) is equipped with a weighbridge (7) at its lower end.

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