Double-pipe folding mechanism

The utility model relates to a double-pipe folding mechanism which comprises a machine frame and an extrusion assembly arranged on the machine frame. The extrusion assembly comprises a bottom plate transversely fixed to the top of the rack and two traction modules which are movably connected to the top of the bottom plate, have the front-back translation function and are symmetrically arranged in the front-back direction. The lead screw is transversely and rotatably connected to the top of the bottom plate and connected with the two traction modules so as to enable the two traction modules to be always in a centering state during translation, and the hand wheel is fixed to one end of the lead screw; the device further comprises a guide assembly. According to the utility model, the difficulty of folding operation of the inner pipe and the outer pipe is greatly reduced, so that the working efficiency is improved; and as long as the inner pipe and the outer pipe are long enough, the folding operation of the inne