Preparation method of crosslinked polyethylene cable connector

Abstract

The invention relates to a cable connector, in particular to a preparation method of a crosslinked polyethylene cable connector. The preparation method comprises the following steps: firstly, peeling and cutting insulating layers at two ends of a cable so that a core of the cable is exposed; secondly, cutting the crosslinked insulating layers on two sides of the connector to be conical; thirdly, setting an anti-stress cone at the end of the cable, and fixing the treated cable to two ends of an insulating forming die, wherein the insulating forming die comprises a metal outer die and an elastic lining die, an elastic die expansion gap is formed between the metal outer die and the elastic lining die, and the temperature of an inner cavity of the insulating forming die is raised to be 120 DEG C; fourthly, after performing cleaning drying treatment on the surface of the insulating layer, setting an outer semi-conducting layer in combination with an outer shielding layer reserved section of the cable; and fifthly, wrapping a metal belt on the surface of the outer semi-conducting layer in a gap manner, using an oxyhydrogen flame to firmly weld two ends of the metal belt and the outer surface of a lead protective tube so as to form a metal projective sleeve tube, and then using the oxyhydrogen flame to trim welding surfaces at two ends of the metal protective sleeve tube so as to form a slope connecting section.

Description

technical field [0001] The invention relates to a cable joint, in particular to a preparation method of a cross-linked polyethylene cable joint. Background technique [0002] Existing cross-linked polyethylene cables often need a long length when used, and due to the limitation of manufacturing technology, the length of a single cable is limited to a certain extent. Since the length of a single cable is not enough, it is necessary to connect multiple cables, and the connection of the current cross-linked polyethylene cables is often done with flexible joints. In order to ensure that the entire cable has good electrical properties, the flexible joint is required to have the same excellent electrical properties as the body of the XLPE cable. There are various structures of traditional joints, among which soft joints are better used. However, at present, the manufacturing process of cable intermediate joints with various structures mainly includes six types: wrapping type, ca...

AI Technical Summary

Problems solved by technology

However, it is precisely because of the cross-linked polyethylene heat shrinkable tape that must be used in the molded joint process that it is inevitable that pollutants will be entrained in the production process of this cross-linked polyethylene insulating tape; During the process, a certain amount of air gap must be entrained; therefore, the molded joint process is only suitable for making cross-linked insulated power cable factory soft joints below medium and low voltage levels.

[0004] Although the flexible joints made by the mold-casting joint process have the best electrical performance, due to the complicated manufacturing process and long construction period, it generally takes 3 to 4 weeks to make a three-phase molded joint. The requirements are strict, and the engineering and technical personnel who make the joints have a high level of operational skills and require a lot of process equipment.

Therefore, in recent years, the mold casting joint technology has not been really utilized.

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