Pipeline flowmeter for underground water circulation well

The utility model relates to a pipeline flowmeter for an underground water circulation well, which belongs to the technical field of underground water remediation and comprises a flowmeter and a protective shell, a converter is arranged in the middle of the flowmeter, and the protective shell is of a U-shaped shell structure which is composed of a U-shaped plate and a pair of end plates and is provided with an opening on one side. The open side of the protective shell is welded to the flowmeter in a sealing mode, a sealing cavity is formed between the protective shell and the flowmeter, the converter is contained in the sealing cavity, and by the adoption of the structure, the converter is arranged in the sealing cavity formed between the protective shell and the flowmeter and prevented from being directly scratched and collided with the well wall in the process of going up and down the well; the protective shell isolates external underground water, the converter is prevented from being corroded and soaked by