Electromagnetic flowmeter capable of preventing interference of external magnetic field

Abstract

The invention discloses an electromagnetic flowmeter capable of preventing external magnetic field interference, which comprises a pipeline and a protective cover, the pipeline is fixedly sleeved with a connecting pipe, the upper end of the connecting pipe is fixedly connected with a threaded rod, the threaded rod is slidably sleeved with a sleeve, the upper end of the sleeve is provided with a flowmeter main body, and the flowmeter main body is fixedly connected with the protective cover. The sleeve penetrates through the lower end of the protective cover and is fixedly connected with the protective cover, a lifting mechanism used for lifting the flowmeter body and the protective cover is arranged at the lower end of the sleeve, an observation window is formed in the side wall of the protective cover, and two symmetrically-arranged limiting rods are jointly and fixedly connected between the inner bottom and the inner top of the protective cover. The device is reasonable in structure, through the arrangement of the cleaning mechanism and the moving mechanism, water mist or dust on the observation window is cleaned, reading difficulty caused by the water mist on the observation window is prevented, reading can be conducted without opening a protective cover, and reading convenience is improved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic flowmeters, in particular to an electromagnetic flowmeter capable of preventing external magnetic field interference. Background technique [0002] Electromagnetic flowmeter is a new type of flow measuring instrument developed rapidly with the development of electronic technology. Electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid according to the electromotive force induced when the conductive fluid passes through an external magnetic field. [0003] Electromagnetic flowmeters use electromagnetic induction to measure the flow of conductive fluids. Therefore, electromagnetic flowmeters are greatly affected by magnetic field interference. When there is magnetic field interference in the installation range, the measurement accuracy will be low. The existing technology is To solve this kind of problem, it is ...

AI Technical Summary

Problems solved by technology

[0003] Electromagnetic flowmeters use electromagnetic induction to measure the flow of conductive fluids. Therefore, electromagnetic flowmeters are greatly affected by magnetic field interference. When there is magnetic field interference in the installation range, the measurement accuracy will be low. The existing technology is To solve this kind of problem, it is mostly necessary to install a protective cover capable of isolating the magnetic field outside the flowmeter, and read the flowmeter through the observation window on the protective cover. When the protective cover is in use, due to the temperature difference between the inside and the outside, it is easy to generate electricity on the observation window. The water mist will cause the situation to be unclear. At this time, it is necessary to manually open the protective cover for reading. This method is not only time-consuming and laborious, but also easily causes moisture inside the protective cover, which is easy to cause damage to the flowmeter.

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