Composite pipe and preparation method thereof

• Main Authors: LIU YONGHONG, LI XUESHI, PENG CHUNZHU, LI FANGYING, RU QIHENG, LIANG BO, MA PEIDONG, WANG HAI, GAO HONGZHUO, DONG WANYU
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PIPES; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention discloses a composite pipe which sequentially comprises an inner core pipe, a copper-plated steel wire, a prepreg fiber belt and an outer protective pipe from inside to outside. The copper-plated steel wire is coated with high-performance adhesive resin at a high speed, and the pre-impregnated fiber belt is fully pre-impregnated with the high-performance adhesive resin. The preparation method comprises the following steps: (1) extruding raw materials of the inner core pipe, and carrying out vacuum cooling and sizing; (2) coating high-performance adhesive resin on the copper-plated steel wire at a high speed, and winding; (3) fully pre-impregnating the pre-impregnated fiber belt with high-performance adhesive resin, and winding the pre-impregnated fiber belt; and (4) forming a final composite structure through the outer protective pipe extruded by the connecting layer composite die head and the outer protective pipe composite die head, and performing vacuum cooling sizing, cutting, sealing and tr