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Transmission line: the screw transmission machine is composed of frame, tire, wheel spacing, wheel screw Angle adjusting mechanism and power system. Spiral conveyor is divided into: integrated, single group passive, single group drive, double group drive. Integrated general arrangement in the cleaning, spray, and the finished pipe plumber located in, the purpose is to realize pipe and double tube, pipe, quick quick, a single set of passive and a single set of drive arrangement on production line transition place for each station, play the role of cohesion in various processes, double set driven conveyor machine tires for trait used process rigidity roller wheel decoration, because of high intermediate frequency heating zone temperature is unfavorable use rubber solid tyre, adopts double drive is in order to better implement of tubing on the production line running, large diameter 3 PE production line adopts a single set of transmission.