Composite static start-stop method mass flowmeter calibration system

A mass flowmeter and calibration system technology, applied in the field of compound static start-stop method mass flowmeter calibration system, can solve the problems of reduced accuracy, system paralysis, calibration system accuracy error, etc., so as to improve the accuracy and stability, improve the system Reliability, the effect of avoiding precision errors

Inactive Publication Date: 2009-10-14
XIAN DONGFENG MACHINERY & ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. When using the weighing method, because the working method of the dynamic start-stop method is inconsistent with the actual on-site working method, when the mass flowmeter calibrated by the manufacturer is applied to the actual site, due to the change of the working environment and method There are deviations in the working characteristics of the mass flowmeter, and the accuracy is reduced
[0006] 2. When using the weighing method, there must be an error in the positive and negative travel time of the commutator, which affects the accuracy error of the entire calibration system, and it is impossible to avoid this error by replacing or improving the commutator
[0007] 3. When using the weighing method, since the fluid in the pipeline cannot be completely injected into the weighing container, part of the fluid will remain in the pipeline, which will cause errors in the accuracy of the calibration system
[0008] 4. When using the weighing method, in order to improve the accuracy of the calibration, it is necessary to reduce the error by weighing a larger flow rate, resulting in a longer calibration work cycle and low calibration efficiency, which is not conducive to the mass production of the manufacturer
[0012] 3. When using the standard table method, once the standard table is seriously deviated or broken, the reliability of the entire calibration system will be reduced, so that the system will be paralyzed and calibration work will no longer be possible.
[0013] 4. When using the standard table method, in order to ensure the accuracy and reliability of the system, it is necessary to regularly check the standard table, thus increasing the workload
[0014] 5. When using the standard meter method, the range of the tested mass flowmeter often does not match the range of the standard mass flowmeter, which causes unnecessary accuracy errors

Method used

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  • Composite static start-stop method mass flowmeter calibration system
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  • Composite static start-stop method mass flowmeter calibration system

Examples

Experimental program
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Effect test

Embodiment 1

[0049] When the shut-off valve 9 is opened and the shut-off valve 10 is closed, the system works in a static start-stop method. For flow pump group 2, select the flow pump that corresponds to the flow point to be calibrated. For standard mass flowmeter groups 14, 15 select the standard mass flowmeter consistent with the range of the mass flowmeter 5 to be tested. When working, the fluid in tank 1 is flowed The pump is pumped out, and the fluid is smoothly injected into the weighing container 7 through the first set of standard mass flow meters 14, the mass flow meters to be tested 5, the second set of standard mass flow meters 16 and the steady flow device 16. When a measurement period is completed, the shut-off valve 9 shuts off the liquid flow, and the electronic scale 8 can weigh the mass of the liquid flowing into the weighing container 7 and transmit the data to the computer 11. Compare and analyze the data measured by the first group of standard mass flow meters 14, the mass...

Embodiment 2

[0051] When the shut-off valve 9 is closed and the shut-off valve 10 is opened, the system works in a double-standard meter calibration mode. When working, a standard mass flow meter that matches the measuring range of the mass flow meter 5 to be measured can be manually selected. The fluid in the water tank 1 is pumped out by a flow pump, and the fluid passes through the first group of standard mass flow meters 14, the mass flow meters to be tested 5, and the second group of standard mass flow meters 15, and then directly flows back to the water tank 1. When a measurement cycle is completed, each data is transmitted to the computer 11 for data analysis. If the data error between the first group of standard tables and the second group of standard tables is less than the empirical error, the data in this group is credible and effectively retained; if the data error is greater than the empirical error, the data in this group will be eliminated, and the credible data and the test The...

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Abstract

The invention relates to a composite static start-stop method mass flowmeter calibration system which is used for checking the flow rate of a mass flowmeter, is a calibrating apparatus adopting the mass flowmeter that is nationally and legally prescribed and can check the main characteristics and accuracy index of the mass flowmeter. The calibration system comprises a water tank, a current stabilizer, a regulating valve, stop valves and an electronic scale, and is characterized in that a flow rate pump set is connected between the water tank and the current stabilizer, the two sides of the flowmeter to be measured are respectively connected with standard flowmeter sets, the two ends of the regulating valve are respectively provided with the stop valves, one end thereof is connected with the water tank, and the other end is connected with the current stabilizer which is connected with a weighing container; the standard flowmeter sets, the flowmeter to be measured, the regulating valve and the electronic scale are connected with a computer. The calibration system has the advantages of weighing method and standard scale method, so as to have high accuracy in calibration and working efficiency and the like; furthermore, a static start-stop method is adopted to calibrate the mass flowmeter, so that the accuracy error caused by inconsonant positive and negative strokes of a steering gear can be avoided.

Description

Technical field [0001] The invention relates to a composite static start-stop method mass flowmeter calibration system. technical background [0002] In order to ensure the accurate measurement of mass flow meters, the measurement performance of the mass flowmeter must be regularly tested or verified before leaving the factory, during use, and after maintenance. The flow calibration of the mass flowmeter is to use the national statutory mass flowmeter verification device to check its main characteristics and accuracy indicators. [0003] The existing mass flow meter calibration devices have weighing method and standard meter method. [0004] For mass flow meters, the most suitable calibration method is the weighing method. The flow chart of weighing method verification is as follows figure 1 As shown, it has the following problems: [0005] 1. When using the weighing method, because the working mode of the dynamic start-stop method is inconsistent with the actual field work mode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00
Inventor 张鹏秦宇任卫东周秉直张朝辉张润华
Owner XIAN DONGFENG MACHINERY & ELECTRONICS
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