Hardness detection device for circular seamless steel tube

The utility model discloses a hardness detection device for a circular seamless steel pipe, relates to the technical field of seamless steel pipes, and solves the problems that at present, a first fixing block and a second fixing block are arc-shaped, and the radians are inconvenient to fix, so that seamless steel pipes with different pipe diameters cannot be detected and used; certain limitation exists in the using process. Comprising a bottom plate, an L-shaped plate is fixedly mounted on one side of the top end of the bottom plate, a transverse plate is fixedly mounted in the middle of one side of the L-shaped plate, a two-way lead screw is rotationally connected into the bottom plate, two clamping assemblies are arranged on the surface of the two-way lead screw, and each clamping assembly comprises a moving plate, two clamping plates and two limiting rods; the two moving plates are in threaded connection with the two ends of the bidirectional lead screw through lead screw nuts, and clamping plates are fix