Verification and calibration system of high-pressure oil flowmeter and working method of verification and calibration system

Abstract

The invention discloses a verification and calibration system for a high-pressure oil flow meter and a working method of the verification and calibration system. The verification and calibration system comprises an adjustable stepless variable high-pressure liquid supply device, a working liquid parameter guarantee system, a working liquid conveying control and tested flow meter clamping system, a working liquid weighing and metering system and a process control system. The method has large direct economic benefits in the field of oil product conveying, metering and settlement, the high-pressure oil flow meter is accurately verified and calibrated, the quality level of a tested hydraulic element or system can be accurately reflected in a hydraulic testing system with the high-pressure oil flow meter as a standard source, and the accuracy and the reliability of the system are improved. Meanwhile, accurate data support is provided for production and manufacturing of hydraulic elements and systems, accurate data support can be provided for production enterprises, and data basis is provided for links such as product research and development, production and manufacturing, factory verification, debugging and calibration and the like.

Description

technical field [0001] The invention relates to the field of verification and calibration of high-pressure oil flowmeters, in particular to a verification and calibration system of high-pressure oil flowmeters and a method for using the same. Background technique [0002] The verification and calibration device of the existing flowmeter cannot completely simulate the verification or calibration of the high-pressure oil flowmeter in the actual use state in the verification and calibration laboratory, and can only be verified and calibrated under normal pressure. Commonly used methods are standard flow meter method and weighing method. The standard flowmeter method is to use a high-precision flowmeter as a standard source to verify a low-standard flowmeter, also known as the comparison method. There are two methods of weighing method. For the flowmeter whose display value is flow rate type, the weighing device is used to weigh the weight of the flowmeter under test within a c...

AI Technical Summary

Problems solved by technology

[0004] 1. It is impossible to assess the influence of the coefficient change caused by the deformation of the parts of the high-pressure flowmeter in a pressure-bearing environment on the measurement accuracy; 2. It is impossible to assess the influence of the fluid passing through the flowmeter under high pressure on the measurement accuracy due to liquid turbulence

3. It is impossible to assess the influence of the gas contained in the working liquid under different pressures on the actual measurement accuracy due to different solubility; 4. The existing flow calibration devices generally use water-based or diesel as the working liquid, while the general working liquid of high-pressure oil flowmeters For hydraulic oil, use water-based or diesel to calibrate the high-pressure oil flowmeter. Because the viscosity and lubricity of the working fluid are different, the resistance and driving force of the metering parts inside the high-pressure oil flowmeter are also different when they rotate, so accurate calibration cannot be performed. Accurate parameters and precision of oil flowmeter in actual work

5. The existing flow calibration device is generally carried out in the constant temperature room of the flow laboratory, and the temperature is generally constant at 20 degrees Celsius. In the working environment of the high-pressure oil flowmeter, the standard oil temperature is between 30 and 80 degrees. The existing system There is no working liquid temperature adaptation device, and it is impossible to assess the interference of measurement accuracy and standard coefficient due to the influence of temperature on parameters such as pipelines, components, and oil density

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