Erosion prevention device for sensor magnetic ring

The sensor magnetic ring erosion prevention device comprises an upper shield, a lower shield and fixing bolts, the upper shield and the lower shield are the same in appearance and size, the upper shield and the lower shield are each of a hollow disc-shaped structure, two fixing handles are symmetrically distributed on the periphery of each disc, and a through hole is formed in the middle of each fixing handle; a disc bottom circular ring of the disc-shaped structure is consistent with a sensor magnetic ring in shape and size, namely, the diameter of the inner circumference of the disc-shaped structure is equal to the diameter of the outer circumference of the magnetic ring, and two second bolt holes consistent in size are symmetrically distributed in the disc bottom circular ring of the disc-shaped structure. The anti-erosion device which is made of stainless steel and is high in hardness is additionally arranged on the magnetic ring, so that the magnetic ring is protected from being scoured by pressure water