Protection device for measuring pipe lining membrane by electromagnetic flow meter in pipeline with steam adjoining pipe

Abstract

The invention relates to a protection device for measuring pipe lining membrane by an electromagnetic flow meter in a pipeline with a steam adjoining pipe. The device can solve the problem that pipe lining membranes are damaged by an existing measuring technology. The technical scheme of the protection device is that protection device comprises the electromagnetic flow meter installed on the pipeline with the steam adjoining pipe, the pipelines of the liquid inlet and outlet ends of the measuring pipe of the electromagnetic flow meter are respectively provided with shutoff valves; the liquid inlet end or the liquid outlet end of the measuring pipe of the electromagnetic flow meter and the pipeline between the corresponding shutoff valves are further connected with a pressure reinforcing unit which comprises an inert gas filling pipeline connected with the liquid inlet end or the liquid outlet end of the electromagnetic flow meter. The protection device is simple in structure, and convenient to operate, so that the lining membrane is in the safe using state for a long period, and the service life of the electromagnetic flow meter can be obviously improved.

Description

technical field [0001] The invention relates to a flowmeter protection device, in particular to a liner film protection device for the measuring tube of an electromagnetic flowmeter in a pipeline with a steam accompanying pipe. Background technique [0002] Electromagnetic flowmeters are widely used in the chemical industry. Due to the strong corrosiveness of the chemical medium, the manufacturer of the electromagnetic flowmeter makes the metal measuring tube into a lining type, and the polytetrafluoroethylene film is often used as the lining material, but the film is often damaged during use, and the entire electromagnetic flowmeter fails to measure , no signal output, loss of measurement function. In this case the measuring tube can only be replaced with a new one. However, because the cause of the damage is unclear, the damage of the lining membrane occurs repeatedly, which brings safety hazards to the flow measurement system. [0003] figure 1 It is a partial cross-s...

AI Technical Summary

Problems solved by technology

As the medium is discharged, or steam condenses inside the pipeline, P i There may be a negative pressure vacuum state, at this time P o "P i , the lining membrane is easily ruptured

[0013] The damage of the lining film of the measuring tube has become a normal state, and there have been no reports on the safe use of the protective lining film at home and abroad so far.

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