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What is the principle of a petroleum mass flow meter - focus on microfluidic control technology

LPG is not only the main product of refining and chemical enterprises, but also one of the important raw materials. Because the physical properties of liquefied petroleum gas have special characteristics compared with other petroleum products, it has a great influence on the stable operation and measurement accuracy of the flowmeter, so it becomes a major problem in the flow measurement of refining and chemical enterprises. Through more than ten years of continuous exploration, as well as improved measurement methods and measurement methods, and benefited from the maturity of flowmeter technology in the past decade, this problem has been solved better.
The petroleum mass flowmeter structure generally consists of two parts: a signal measuring sensor and a signal converter. Because the flowmeter has the characteristics of direct measurement of fluid bead mass flow, high measurement accuracy, wide application range, low installation requirements, reliable instrument operation and low maintenance rate, it has been widely used in petroleum, chemical, metallurgy, heat, electricity, food. Flow measurement in other fields. The flow tube in the sensor housing vibrates with its natural frequency. The vibrating tube is driven by an electromagnetic driving coil attached to the end of the vibrating tube to approximate the vibration of the tuning fork. The vertical movement of the flow tube is forced to be accepted as the fluid flows into the flow tube.
During the half cycle of the upward flow of the flow tube, the fluid resists the upward movement of the tube and increases its vertical momentum to apply a downward force to the flow tube. Conversely, the fluid flowing out of the flow tube applies an upward force to the flow tube to counteract the vertical vibration of the tube as it vibrates upward. This causes the flow tube to be distorted. During the other half of the vibration, the flow tube vibrates downwards, and the twist direction is reversed. According to Newton's second law, the amount of distortion of the flow tube is completely proportional to the mass flow through the flow tube.
The oil mass flowmeter is installed on the two sides of the flow tube. The electromagnetic signal detector is used to detect the vibration of the vibrating tube. The mass flow rate is determined by the phase difference between the two signals. When no fluid flows through the flow tube, the flow tube does not. Distortion, the detection signals of the electromagnetic signal detectors on both sides are in phase. When there is a fluid interflow tube, the distortion of the flow tube is generated, which causes the phase difference of the C detection signals. This phase difference is directly proportional to the quality of the flow. flow.

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