▎ 摘　　要

NOVELTY - The heat pump pipe has an outer thermal insulation layer (33) coated on the surface of the modified layer (31). The inner carbon fiber layer (32) is built into the inner cavity of the outer insulation layer. The ground source heat pump pipe is prepared by mixing the graphene powder with the modifier to prepare a modified graphene dispersion, preparing modified graphene dispersion into modified graphene powder, mixing modified graphene powder with polyethylene (PE) and anti-aging agent and stirring. The stirring is stopped when the friction temperature of the mixture rises to 120 degrees C, so as to transfer to a low-speed cooling mixer, and add coupling agent powder for slow cooling and stirring. The mixture is put in a storage tank to prepare the modified mixture when the mixing and stirring temperature drops to 50 degrees C, and is granulated with a granulator to prepare the granular raw material of the modified layer. USE - Graphene-modified high-efficiency heat conduction ground source heat pump pipe. ADVANTAGE - The bending effect of heat pump pipeis better, thus effectively preventing the internal cracks or direct cracks of the pipe during bending. The obtained tube blank is modified by mixing graphene to increase the performance of the tube. The inner carbon fiber layer is used for anti-corrosion and the outer insulation layer is used for heat preservation, which greatly increases the quality of the finished coffin. DETAILED DESCRIPTION - The raw materials of the modified layer, the inner carbon fiber layer and the outer thermal insulation layer are added into a three-layer co-extrusion mold, and the composite extrusion molding is performed at a temperature of 190-220 degrees C to obtain a tube blank. The prepared tube blank is cut, grinded, and polished. The polished pipe blank is bend through the pipe bending device, and the pipe blank is placed in the pipe placing box. The limit air cylinder is started to drive the baffle plate to move upwards, and the obstruction is loosed to the pipe outlet. The inner tube blank slides out from the pipe outlet to the surface of the processing table. The pipe is manually pushed to the inside of the heating table, so as to start the double-rod air cylinder to drive the sliding frame to move to the middle, and drive the clamping block to move to clamp the pipes together. The bending part of the pipe is heated by the heating plate built in the clamping block. The double-rod air cylinder is retracted after the softening is completed, so as to push the pipe forward, and abut the bending part against the surface of the guide wheel. The first pushing air cylinder is started to drive the first top block to move forward to abut on the surface of the pipe. The third pushing cylinder is started to drive the second top block to protrude and abut against the surface of the other side of the pipe. The second pushing cylinder is started to drive the turret to rotate on the surface of the limit rod and drive the second top block to rotate to bend the pipe. An INDEPENDENT CLAIM is included for a method for preparing graphene-modified high-efficiency heat conduction ground-source heat pump pipes. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene-modified high-efficiency heat conduction ground source heat pump pipe. Modified layer (31) Inner carbon fiber layer (32) Outer thermal insulation layer (33)