Device for bending pipeline

The utility model relates to a device for bending a pipeline, which comprises an oil cylinder seat, an oil cylinder, an oil pump, a lower positioning plate, an upper positioning plate, a push rod, a pipe bending die and two supporting wheels, and the right end of the oil cylinder is fixedly connected with the left end of the oil cylinder seat; the oil pump communicates with the oil cylinder through an oil pipe; the left end of the lower positioning plate is fixedly connected with the lower part of the oil cylinder seat; the left end of the upper positioning plate is rotationally connected with the upper part of the oil cylinder seat; the push rod is fixedly connected with a piston rod of the oil cylinder; the pipe bending die is fixedly connected with the push rod; the two supporting wheels are installed between the lower positioning plate and the upper positioning plate by inserting bolts into the first bolt holes and the second bolt holes respectively. The extending length of the piston rod is controlled by