▎ 摘　　要

NOVELTY - Preparing internal spiral polyvinyl chloride drainage pipe comprises (i) bending and spiraling steel wire through bending mechanism to obtain spiral steel wire, and introducing into extrusion mechanism, (ii) injecting pipe raw material into extrusion mechanism and extruding to obtain pipe, placing spiral steel wire inside pipe to obtain reinforced pipe, (iii) loading inner layer paint into first storage tank, and inner layer paint into spraying screw mechanism by injecting first storage tank, loading outer coating into second storage tank, and injecting outer coating into brushing mechanism by second storage tank, (iv) carrying out spiral groove processing to inner wall of reinforced pipeline, forming inner spiral groove, spraying inner layer of paint on inner wall of reinforced pipe, and (v) extruding reinforced pipe, painting outer layer of paint on outer wall of reinforced pipe by brushing mechanism to drainage pipe, and (vi) performing preliminary drying. USE - The method is useful for preparing internal spiral polyvinyl chloride drainage pipe. ADVANTAGE - The piper has high-strength, good drainage effect, improved corrosion resistance and impact resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for internal spiral polyvinyl chloride drainage pipe, comprising a pipe body, where the outside of pipe body is provided with an outer coating, the inner side of pipe body is provided with a number of internal spiral grooves uniformly distributed on circumference, and the inner side of pipe body is provided with an inner coating, the inside of pipe body is coated with a spiral steel wire, the pipe body comprises 100 pts. wt. polyvinyl chloride, 10-12 pts. wt. polycarbonate, 2-4 pts. wt. stabilizer (T-178), 8-12 pts. wt. filler (calcium carbonate powder), 1-3 pts. wt. plasticizer (di((2)-ethylhexyl) phthalate), 1-3 pts. wt. anti-impact agent (MBS-(66) and 1-3 pts. wt. lubricant (Sasol Wax HN 61), the outer coat comprises 100 pts. wt. nitrile powder, 200-250 pts. wt. plasticizer, 1-3 pts. wt. stabilizer, 0.5-2 pts. wt. polyethylene wax, 25-40 pts. wt. cyclohexanone, 10-15 pts. wt. butanone, 25-40 pts. wt. silver powder, 25-40 pts. wt. pearlescent powder and 3-5 pts. wt. photoinitiator, and the internal coating comprises 55-65 pts. wt. amine curing epoxy resin, 55-65 pts. wt. epoxy acrylic resin, 20-25 pts. wt. graphene, 6-12 pts. wt. artificial diamond particles and 20-30 pts. wt. artificial fibers. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of flow chart for preparing internal spiral polyvinyl chloride drainage pipe. (Drawing includes non-English language text).