Non-contact type single-point liquid metal liquid level measurement device

Abstract

The invention discloses a non-contact type single-point liquid metal liquid level measurement device, which consists of a sensing probe, a lifting casing pipe, a liquid level probe, a direct-current stepping motor, an upper flange plate, a lower flange plate, a sealing shell, a meshing gear, a sealing element, a signal processing system, a motor driving system and a wireless transmission system, wherein the sensing probe detects the free liquid level of detected liquid metal; and the stepping motor is controlled by a corresponding control algorithm to drive the lifting casing pipe to lift, thereby keeping the sensing probe always in non-contact with the liquid level of detected liquid metal to realize non-contact measurement; the maximum detection distance between the sensing probe and the liquid level of detected liquid metal can be automatically calibrated by the liquid level probe, and the liquid level can be prevented from contacting with the sensing probe; and the sealing element can ensure the tightness of a measured container and is suitable for measuring the metal liquid level of the pressure container. The liquid level device can measure the liquid level of the liquid metal of which the temperature is up to 600DEG C, can be used for a long time, and has the advantages of high reliability and good sensitivity and accuracy, and is suitable for the accurate non-contact measurement of the high-temperature liquid metal liquid level.

Description

technical field [0001] The invention belongs to the technical field of metal liquid level measurement, and in particular relates to a non-contact single-point liquid metal liquid level measurement device. Background technique [0002] Liquid metal is a metal with high conductivity. At present, its liquid level measurement methods mainly include probe type liquid level measurement method, differential pressure liquid level measurement method and inductive liquid level measurement method. [0003] Probe type liquid level measurement is a contact liquid level gauge. Its working principle is to add electrodes to the probe and the surface of the container respectively. When the metal liquid level touches the probe electrode, a closed circuit is formed to output a corresponding electrical signal. Its disadvantages are: liquid metal vapor may condense on the insulator, destroy the insulating layer, and cause false connection; metal oxides are deposited on the electrical contacts, r...

AI Technical Summary

Problems solved by technology

Its disadvantages are: liquid metal vapor may condense on the insulator, destroy the insulating layer, and cause false connection; metal oxides are deposited on the electrical contacts, reducing the electrical conduction performance

Its disadvantages are: the pressure induction tube needs to be installed on the surface of the liquid metal container, which may affect the integrity of the container; the pressure difference measurement accuracy of high-temperature liquid metal is difficult to guarantee, thus affecting the accuracy of liquid level measurement

Its disadvantages are: the dielectric properties of liquid metal will affect the electromagnetic signal, thereby affecting the accuracy and reliability of the liquid level signal; the insulation layer of the inductance coil is easy to age in a high temperature environment, and is not suitable for long-term work

[0006] In summary, the limitations of the above measurement principles limit the range of use and measurement accuracy of liquid level measurement devices

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