Vacuum chuck guide rail

The utility model relates to the field of automatic nondestructive testing for welding seams of large pressure container cylinders, in particular to a vacuum chuck guide rail applied to the automatic nondestructive testing. The vacuum chuck guide rail comprises a guide rail plate, axial stops, a vacuum generator and vacuum chuck assemblies, wherein a guide rail plate main body is made from a soft magnetic material with good elasticity and high magnetic permeability; a plurality of vacuum chuck assemblies, a compressed air switching valve and the vacuum generator are uniformly distributed on the looking-up surface of the guide rail plate; the vacuum generator is connected with the vacuum chuck assembly by an air pipe and connected with the compressed air switching valve; a peripheral auxiliary locating block is fixed on any angle of the guide rail plate, and an axial auxiliary locating block is clamped on the long edge of the same side of the guide rail plate; and the two axial stops are fixed on the looking-u