Rail travelling crane for pipeline transportation

The invention is applicable to the technical field of pipeline transportation, and provides a rail crane for pipeline transportation, which comprises a vehicle body and two parallel low-voltage power supply rails preset on the ground, the vehicle body comprises a lower vehicle frame and an upper vehicle frame, and a hydraulic lifting mechanism for driving the upper vehicle frame to lift is arranged between the lower vehicle frame and the upper vehicle frame. According to the rail travelling crane for pipeline transportation, the low-voltage power supply rail is arranged on the ground, the crane body walks on the ground rail, the rail and the conductive brush supply power to electrical equipment of the crane body, the hydraulic lifting mechanism controls the upper frame to ascend and descend to adjust the height, a common suspension type travelling crane is replaced, the crane body is low in height, climbing operation is not needed, and overhauling is convenient; the hydraulic lifting mechanism is used for ach