Special clamp for pipe hydrostatic testing machine

The utility model belongs to the technical field of pipe performance detection equipment, and particularly relates to a special fixture for a pipe hydrostatic testing machine, which comprises a U-shaped base, a bidirectional screw rod is rotatably mounted between the inner walls of the front side and the rear side of the U-shaped base in a penetrating manner, and the outer side of the bidirectional screw rod is in threaded connection with two U-shaped support plates; a guide rod is fixedly installed between the inner walls of the front side and the rear side of the U-shaped base, and the two U-shaped supporting plates are both in sliding connection with the guide rod. The pipe clamp is reasonable in structural design, the fixing tables are close to each other or far away from each other, the positions of the fixing tables can be adjusted according to the diameter of a pipe, the problem that a clamp lower cover is inconvenient to place at the bottom of the pipe can be solved by erecting the pipe, and the fixin