A Coriolis mass flowmeter with spiral wiring and its wiring method

Abstract

The invention discloses a spirally-wired coriolis mass flowmeter and a wiring method and relates to measuring instruments. The spirally-wired coriolis mass flowmeter is characterized by comprising a base, a U-shaped measuring pipe, spacing plates, signal sensors, a drive sensor and an outgoing line gathering port, wherein the two roots of the U-shaped measuring pipe penetrate through the spacing plates and are fixedly connected with the base, the signal sensors and the drive sensor are fixed to the U-shaped measuring pipe and are provided with signal outgoing lines, all the signal outgoing lines penetrate through the outgoing line gathering port, the outgoing line gathering port is located in the base, all the signal outgoing lines are wound on the U-shaped measuring pipe in a spirally wiring mode, and the signal lines and the U-shaped measuring pipe are fixed through mucilage glue.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to a mass flow meter based on the Coriolis principle. Background technique [0002] The development of mass flowmeters based on the Coriolis principle began in the early 1950s. Until the mid-1970s, the resonant Coriolis mass flowmeter was first developed by Micro Motion in the United States, and a patent was applied for in 1982. its into the international market. In the mid-to-late 1980s, instrument manufacturers in various countries cooperated with universities to conduct research and development on this new type of mass flowmeter. After decades of research and development, various shapes of Coriolis Mass Flowmeter (CMF) have been developed, and its measurement performance has also been greatly improved. [0003] Coriolis mass flowmeters usually use a certain vibration mode of the sensor to make it work in a resonance state in the form of closed-loop control. When the measured flow passe...

AI Technical Summary

Problems solved by technology

Once the peeling phenomenon occurs, the sensor will be invalid, and the lead wires laid out in the first way are located in the direction of the largest linear expansion deformation of the three, so peeling is very easy to occur

In addition, in order to ensure the bonding strength and vibration resistance of the lead wires, it is often necessary to apply more adhesive, which reduces the performance of the sensor

[0008] For the second wiring method, continue to see figure 2 , although the lead-out line is not pasted on the measuring tube, the shape of the lead-out line in space will determine its stiffness and its force on the vibration of the measuring tube, and will vary with the installation method of the sensor (for example, the sensor is in front and back In the installation mode, the lead-out wire is affected by the gravity in the opposite direction, which will inevitably change its spatial shape) and the working temperature (the change of the working temperature will change the elastic modulus of the lead-out wire itself), which seriously affects the Coriolis quality Measuring Accuracy of Flow Meter

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