Shading device for SF6 meter

The invention relates to a shading device for an SF6 meter. The shading device comprises a shading plate arranged on the SF6 meter and a clamping device for fixing the shading plate on the outer wall of the SF6 meter; the shading plate is made of degradable plastic; the shading plate is a pattern formed by a cylindrical structure in a tangential mode from the top side of one end to the bottom side of the other end; the clamping device comprises a clamping plate and two connecting sleeves; the clamping plate abuts against the shading plate; the clamping plate is in a U shape, and the two connecting sleeves are arranged on the two sides of the clamping plate respectively; the material of the clamping plate is 1Cr18Ni9Ti; a lengthening rod is arranged in each connecting sleeve in a sleeving mode; and rubber plates are arranged on the two faces, making contact with the shading plate, of the clamping plate, and the thickness of each rubber plate ranges from 1 mm to 2 mm. Compared with the prior art, the shading de