Improved installation process of a 10kv three-core cable cold-shrink intermediate joint

Abstract

The invention relates to an improved installation process for a cold shrink intermediate joint of a 10kV three-core cable. The process comprises the following steps: (1) peeling a cable outer sheath, a steel belt, an inner protection layer and filler among cable cores according to sizes; (2) peeling a copper shield and an outer semi-conducting layer of the cable according to sizes; (3) cleaning a main insulator of the cable; (4) crimping copper connecting rods, putting the copper connecting rods into the cold shrink joint and a copper shield net cover in a sleeving way respectively, crimping a copper connecting tube and leads at the two ends with a pair of hydraulic tongs, and winding a copper conductor with a semi-conducting adhesive tape till the copper conductor is flush with the main insulator; (5) brushing a polyethylene special dedicated adhesive; (6) painting two-component RTV (Room Temperature Vulcanized Silicone Rubber); (7) installing the cold shrink joint; (8) installing the copper shield net cover in a sleeving way and overlapping a flat copper woven belt; and (9) performing water-proof protection and mechanical protection. A process of painting the polyethylene special dedicated adhesive and the RTV is adopted instead of a conventional silicone grease painting process, thereby effectively smoothening a cross-linked polyethylene insulating surface layer, enhancing the insulating performances of accessories, saving raw materials and consumable items, and increasing the working efficiency.

Description

Technical field [0001] The invention relates to the field of power cables, in particular to an improved installation process for a cold-shrinkable intermediate joint of a 10kV three-core cable. Background technique [0002] A power cable is generally composed of a conductor, an insulating layer and a protective layer. The protective layer includes a metal protective layer and a rubber-plastic protective layer, which are used to ensure the mechanical strength of the power cable and prevent external corrosion. [0003] Limited to transportation conditions, power cables are usually produced as a 500-meter shaft. When the cable length required on site is greater than 500 meters, two cables are connected by making an intermediate joint. The intermediate joint is mainly used to restore the three-layer structure of the conductor, insulation and sheath of the power cable. At present, during the installation process of the intermediate connector, if the cable is scratched when the cable in...

AI Technical Summary

Problems solved by technology

At present, during the installation process of the intermediate joint, if the cable is scratched when the insulation of the cable is stripped, it is necessary to radially cut off the entire section of the scratched cable, which not only causes a large consumption of cables, high economic costs, but also brings inconvenience to the staff , reducing work efficiency