Experimental high-voltage XLPE cable flexible joint insulating layer interface simulation device and method

Abstract

The invention provides an experimental high-voltage XLPE cable flexible joint insulating layer interface simulation device and method. The device comprises an extruder, a heating solenoid and an injection mold; the injection mold is arranged in the heating solenoid; the extruder extrudes raw materials into the injection mold; the injection mold comprises an end socket, an air outlet pipe, an air outlet, a first injection molding passage, a second injection molding passage, a beveled body and a cylinder; the end socket is installed at the opening end of the cylinder; the cylindrical bevel is formed in the cylinder; the air outlet pipe and the first injection molding passage are arranged right above the cylinder; the air outlet and the second injection molding passage are arranged right below the cylinder; and the cylinder is horizontally placed on a bracket. According to the invention, a sample researched by an experiment can be independently prepared, and the influence of variables such as extrusion rate, an extrusion molding temperature, a reaction force cone inclination and the like on interface electrical characteristics is researched, so that the design of a forming mold and the selection of extrusion parameters are correctly guided, the quality of an actually produced joint product is improved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of injection molding equipment, and in particular relates to an experimental high-voltage XLPE cable soft joint insulation layer interface simulation device and method. Background technique [0002] Polyethylene insulated high-voltage DC cable is a submarine power cable, mainly used for grid connection between islands and mainland or islands, between land and offshore wind farms, and between offshore drilling platforms. The length of a single cable is limited by the cable manufacturing equipment. When the length of a single cable cannot meet the use requirements, multiple cables can be connected with flexible joints until the use length requirements are met. [0003] The preparation of soft joints is mainly realized by injection molding. During the preparation, an extruder is used to extrude the cross-linked polyethylene base material and fill it into the molding die. During the preparation process, the selected moldi...

AI Technical Summary

Problems solved by technology

Since the high-voltage XLPE cable flexible joint insulation layer interface sample studied in the current experiment is cut from the cable provided by the factory, it is impossible to study the influence of variables such as extrusion rate, extrusion temperature, and reaction force cone inclination on the electrical characteristics of the XLPE-XLPE interface. Therefore, it is impossible to correctly guide the design of the molding die and the selection of extrusion parameters, resulting in low production efficiency of soft joints in actual production, and low and unstable product quality.

Images