Special coring clamp for constructional engineering quality detection

The utility model discloses a special coring clamp for constructional engineering quality detection, which comprises a fixed disc, a fixed groove is formed in the fixed disc, a movable disc is rotatably connected to the inner wall of the fixed groove, plane threads are uniformly formed in the surface of the bottom end of the movable disc, and sliding grooves are uniformly formed in the bottom endof the fixed disc. Sliding blocks are slidably connected to the inner walls of the sliding grooves, arc-shaped teeth are evenly installed at the top ends of the sliding blocks, fixing rods are fixedlyconnected to the bottom ends of the sliding blocks, a connecting rod is fixedly connected to the middle of the top end of the movable disc, and a rotating handle is fixedly installed at the top end of the connecting rod. As the plane threads formed in the bottom end of the movable disc are meshed with the arc-shaped teeth at the top ends of the sliding blocks, when the movable disc rotates, the sliding blocks slide in the